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1
Ozcelik, Mehmet. "Environmental effects of marble quarry operations in Burdur Lake Basin (Burdur-Turkey)". Journal of Degraded and Mining Lands Management 10, n. 3 (1 aprile 2023): 4517. http://dx.doi.org/10.15243/jdmlm.2023.103.4517.
Testo completoAbstract (sommario):
Marble is the most important natural material because of its structural features and its long durability. It is mined at operated quarries on hill slopes. The original landform is permanently altered, and vegetation cover is destroyed. Another important feature of marble quarries is the large amount of waste materials released during the quarrying process. In the last decades, together with the visible effects of global warming and climate change, fresh water resources are rapidly depleted and polluted due to careless land use. Quarrying operations are among the most important stakeholders of this process. Environmental effects of quarry activities depend on the location of the site in the landscape, the vertical and horizontal dimensions of the excavation, the methods used to excavate the marble, and the formation of the geological structure. Furthermore, the region's seismicity, microclimate conditions, ecological condition, and surface and groundwater conditions are all factors influencing environmental degradation. Additionally, numerous serious environmental impacts associated with quarrying activities near the site, such as visual pollution, water, dust, noise, air pollution, vibration, land subsidence, and landslides, will cause health issues and unpredictable biodiversity loss. Quarrying operations have the potential to impact pre-existing ecosystems, including groundwater depletion, loss of fertile topsoil, forest degradation, and human health. This article aims to draw attention to various serious environmental impacts, health problems and biodiversity loss resulting from quarrying operations in Burdur Lake Basin.
2
Rasti, Arezou, Hamid Ranjkesh Adarmanabadi e Mohammad Reza Sahlabadi. "EFFECTS OF CONTROLLABLE AND UNCONTROLLABLE PARAMETERS ON DIAMOND WIRE CUTTING PERFORMANCE USING STATISTICAL ANALYSIS: A CASE STUDY". Rudarsko-geološko-naftni zbornik 36, n. 4 (2021): 21–32. http://dx.doi.org/10.17794/rgn.2021.4.3.
Testo completoAbstract (sommario):
Nowadays, most mining and quarrying industries utilize a diamond wire saw machine for bench cutting operations. This method uses a metal wire or cable assembled by diamond beads to cut the hard stone into large blocks. Many parameters classified into controllable and uncontrollable parameters affect the performance of the diamond wire saw cutting method. The uncontrollable parameters are related to rock engineering properties, and controllable parameters are related to operational aspects and machine performance. The diamond wire sawing process’s production rate is one of the most critical parameters influencing the design optimization and quarrying cost estimation. The cutting rate and wear rate of diamond beads are the most important factors to evaluate quarries’ production performance. This study aims to determine the effects of different controllable and uncontrollable parameters on different quarries’ production rates. Rock engineering properties like strength, hardness, and abrasivity, and operational aspects, such as cutting angle and drive wheel diameters, are considered as the main factors affecting the production performance of the diamond wire saw method. To discover the influence of these parameters, a detailed investigation in ten quarry operations was carried out. The relation between cutting rate and diamond bead wear with different parameters is estimated. It was observed that different controllable and uncontrollable parameters could increase or decrease the cutting rate and diamond bead wearing. Furthermore, using simple and multiple regression analysis, performance prediction of the cutting rate and wearing of diamond beads was developed, and the best equations were proposed.
3
Al-Anweh, Ahmed M., Mohammed Ibrahim El-Anbaawy, Mohamed Mahmmoud Abu-Zeid e Ibrahim Al-Akhaly. "Geological Complications and Environmental Hazards of the Cement Raw Materials Quarry Sites in Yemen". Sultan Qaboos University Journal for Science [SQUJS] 28, n. 1 (1 giugno 2023): 53–76. http://dx.doi.org/10.53539/squjs.vol28iss1pp53-76.
Testo completoAbstract (sommario):
Extensive field and site investigations were conducted to assess and evaluate the situation in the presently exploited quarries of cement raw materials in Yemen. These quarries have several geological complications represented mainly by high elevations, steep slopes, rugged topography, heterogeneity in bed thickness, lithologic composition and quality, presence of igneous sills and dykes, intensive fracturing and jointing and abundance of karstification features. Moreover, the processes of quarrying and related operations have several negative environmental impacts the most important of which are soil failure, overburden and land sliding, toppling and rock falls (which result in considerable mass wasting) and emission of dust and noise. Generally, quarrying operations are more hazardous in quarries of gypsum and basement rocks than in those of carbonates and volcanics. Furthermore, the quarries have problems related to the conservation of natural resources. These are represented primarily by the excavation of the valuable agricultural and reclaimed lands and improper exploitation of the cement raw materials and the fresh and underground waters the reserves of which decreased drastically. To deal with the above-mentioned problems, a number of recommendations are outlined. They comprise mitigation measures which must be strictly implemented. Also, it is of almost importance to conduct prospecting for new occurrences of the presently exploited cement raw materials and their possible substitutes as well as additional groundwater resources.
4
Μερτζάνης, Α., Α. Σκοτίδα, Γ. Ευθυμίου e Γ. Ζακυνθινός. "TEMPORAL EVOLUTION OF THE ENVIRONMENTAL SITUATION (GEOLOGY - GEOMORPHY) AND THE LAND USES OF ABANDONED QUARRIES OF THE MOUNTAIN PENTELIKON (ATTICA - GREECE)". Bulletin of the Geological Society of Greece 36, n. 1 (1 gennaio 2004): 216. http://dx.doi.org/10.12681/bgsg.16624.
Testo completoAbstract (sommario):
In the frame of this study, the places as well as the methods and techniques used of marble quarrying in the southwest side of mountain Penteliko, have been located and charted. We record the temporal evolution of the situation of the natural environment, with special reference to the geological - geomorphological structure as well as to the land uses in the area of the abandoned quarries in the mountain Penteliko, in combination with different periods of development of the quarrying works from the ancient times until today. We also mention the impacts on the environment during the operation of the quarries and after the ceasing of the works. These environmental impacts include: a. changes in the morphology of the relief, b. differentiation of the erosion conditions of the land c. interference of the hydrological conditions d. formation of dust, e. noise and vibrations, f. disturbance of the natural ecosystems and g. aesthetic decay of the landscape.
5
Moh’d, Seif Hamza, e Ahmad Kanyama. "Challenges of Addressing Environmental Problems due to Quarrying Operation in Uwandani Ward, Pemba". World Journal of Social Science Research 3, n. 3 (28 luglio 2016): 367. http://dx.doi.org/10.22158/wjssr.v3n3p367.
Testo completoAbstract (sommario):
<p><em>This paper examines the challenges of</em><em> addressing environmental challenges arising from aggregates quarrying at Uwandani Ward in Pemba, Zanzibar. Specifically, the study examines i) the socio-economic importance of quarrying</em><em>,</em><em> ii) the environmental impacts</em><em>,</em><em> iii) the interventions done to address environmental problems</em><em>,</em><em> and iv) the constraints over interventions. Data collection methods included household questionnaire survey, key informants interviews and participant observations. Statistical Package for Social Sciences (SPSS) and content analysis techniques were used in the analysis and processing of quantitative and qualitative data. The findings showed that although the revenue generated from quarrying operation is crucial for the livelihood of the local people, persistent environmental problems have been difficult to address due to lack of education, poverty, rapid increase of quarrying operations, drought and climate change variability, apathy in the community and inferior technology used in the quarrying operations. Furthermore, the challenges of tackling environmental problems are contributed by unsuccessful piecemeal interventions of the government because of the lack of clear recognition and appreciation of the artisanal quarrying operation contribution in the livelihood of local people. This paper recommends that the government recognizes and appreciates informal quarrying operations in order to put effective policies to develop the sector and address its environmental problems. This should be accompanied by the participation of all stakeholders in planning and implementation to address environmental problems through bottom-up approaches.</em><em></em></p>
6
Goforth, Tom T., e Jessie L. Bonner. "Characteristics of Rg waves recorded from quarry blasts in central Texas". Bulletin of the Seismological Society of America 85, n. 4 (1 agosto 1995): 1232–35. http://dx.doi.org/10.1785/bssa0850041232.
Testo completoAbstract (sommario):
Abstract Chemical blasts from quarrying operations in central Texas are routinely recorded by the W. M. Keck Foundation Seismological Observatory near China Spring, Texas. The Keck Observatory consists of a single, broadband, three-component, borehole seismograph system. Five quarries, located at distances ranging from 16 to 101 km from the observatory, each detonate from 1 to 6 tons of ammonium nitrate/fuel oil explosive on the average of twice per week. For every quarry for which the orientation of the working face could be determined, dispersed Rg waves are recorded at the Keck Observatory from those quarries at which the working face is directed away from the observatory, but are not observed or are severely attenuated from those quarries at which the working face is directed toward the observatory. Seismograms containing the dispersed Rg are easily recognized as quarry blasts, but those in which the dispersed Rg is absent look like small earthquakes.
7
Orfanos, M., H. Perakis e V. Gikas. "RF-BASED LOCALIZATION (WIFI RTT/LORA) IN UNDERGROUND QUARRYING FOR AGENT SUPERVISION AND MAPPING APPLICATIONS". International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-1/W1-2023 (25 maggio 2023): 353–61. http://dx.doi.org/10.5194/isprs-archives-xlviii-1-w1-2023-353-2023.
Testo completoAbstract (sommario):
Abstract. Mining and quarrying industry has recently made a shift towards underground exploitation as a viable alternative to traditional open-pit approaches. Thus, emerged the imperative need for localization systems for personnel safety and operations’ monitoring purposes. While there are many approaches taking advantage of the various signals of opportunity (SoO) supported by Internet of Things (IoT) for indoor and underground navigation, the need for a GNSS alternative in such areas is still present in terms of meeting system and user requirements (scale, cost, availability, accuracy, and integrity). The goal of this research is to provide insights regarding different Radio Frequency (RF) technologies operation and evaluate their positioning capabilities (Wi-Fi, BLE and LoRa) in underground industrial facilities such as quarries and mines, following and expanding the tests of previous studies in controlled environment. Furthermore, the multi-sensory approach that this study is pursuing, aims to provide the foundations of a low-cost, scalable and robust positioning system. This system would integrate the characteristics of the aforementioned technologies in order to meet the application-specific user requirements and set the basis for a more efficient mobile mapping system. In this context, technologies’ characterization and comparison is presented, by using data from a real operating underground quarry. The data gathered lead to the conceptualization of the localization scheme, which besides the SoO observables, utilizes their availability status as an additional feature within the quarry as well. The proposed combined approach outperformed the rest, achieving an accuracy bellow 15m for the 85% of the test data, which is sufficient for typical quarrying operations monitoring and management requirements.
8
Ballin, Torben Bjarke. "The worked quartz vein at Cnoc Dubh, Uig parish, Isle of Lewis, Western Isles". Scottish Archaeological Internet Reports, n. 11 (2004): 1–23. http://dx.doi.org/10.9750/issn.2056-7421.2004.11.1-23.
Testo completoAbstract (sommario):
In 2002, an examination was carried out of a small quartz vein at the knoll of Cnoc Dubh, a few hundred metres from the southern shores of Loch Ceann Hulabhig on the Isle of Lewis (NGR: NB 2318 2998). The vein proved to have been worked in prehistoric time, defining it as a quarry, and it was measured, photographed and characterized. In the present paper, the Cnoc Dubh quartz quarry is presented in detail, to allow comparison with other lithic quarries, and it is attempted to define attributes diagnostic of prehistoric exploitation, and to schematically describe the 'mining operations' by which the quartz was procured. As part of this process,quartz quarrying is compared to the procurement of other lithic and stone raw materials, mainly drawing on research from Scandinavia, Australia and the USA, and the location of quartz quarries in relation to prehistoric settlements is discussed. The average distance between quartz sources and Neolithic–Bronze Age sites on Lewis is then used to discuss ownership of, and access to, prehistoric quartz sources, as well as the possible exchange of quartz.
9
Sevelka, Tony. "Blasting Quarry Operations: Land Use Compatibility Issues and Potential Property Value Impacts". Journal of Environmental Law & Policy 02, n. 03 (28 dicembre 2022): 1–78. http://dx.doi.org/10.33002/jelp02.03.01.
Testo completoAbstract (sommario):
Aggregate resources are essential for road and building construction. In 2019, the US domestic production reached 1.53 billion tons of crushed stone valued at $18.7 billion produced by an estimated 1,430 companies operating 3,440 quarries, according to the U.S. Geological Survey (USGS) Mineral Commodity Summaries. But, it is also recognized that a quarry blasting below the water table is one of the most noxious, toxic and destructive uses of land, with no reasonable prospect of post-extraction-rehabilitation. If permitted and established in the wrong geographic location, a blasting quarry operation can result in significant deleterious impacts on the environment and local inhabitants and can disrupt short and long-term land use planning objectives. Because a quarry can remain operational for 100+ years, impacting five or more generations; quarries have the potential to cause permanent environmental degradation, destabilize communities, damage, sterilize or diminish the use and enjoyment of residential and non-residential properties, and reduce property values. Blasting is the preferred method of extracting rock in a quarry operation, the consequences of which can lead to environmental and property damage, and to injury or death of human and non-human life. In North America, licensing and operational oversight of a pit or quarry are primarily controlled by the individual states, territories and provinces, and address matters of compliance, while issues related to land use planning and zoning are entirely within the jurisdiction of the local municipalities, counties or regions. Accordingly, this research paper seeks to inform land use planners of the importance of protecting the environment and its inhabitants from the adverse effects, including the diminution in property values, associated with aggregate extraction operations generally and blasting quarries specifically, through the use of permanent onsite setbacks and offsite separation distances to avoid land use incompatibility and sensitive land uses.
10
J, Matsimbe. "Optimization of Shovel-Truck Productivity in Quarries". International Journal of Research in Advent Technology 8, n. 10 (10 novembre 2020): 1–9. http://dx.doi.org/10.32622/ijrat.810202008.
Testo completoAbstract (sommario):
In open pit operations, the loading equipment drives production but the haulage fleet drives costs. Most quarries in Malawi face challenges in shovel-truck productivity due to factors which require optimization of mine operations. The case of Njuli quarry is used to come up with a model that can be applied by quarries in Malawi. Loading and haulage costs account as much as 50 – 60 % of a company’s total operation cost hence it is necessary to maintain an efficient shovel-truck system. This research optimized the shovel-truck productivity per day, applied the queuing theory to the haul cycle, and suggested ways to improve the efficiency of materials handling operations. Examining a match between truck body size and shovel bucket size yielded the size of the load, cycle time and number of trips in an hour. The cycle time depended on the weight of the equipment, the horsepower of the engine, haul distance, and condition of the road plus dump area. Quarry companies in Malawi will apply this new knowledge to improve equipment selection and maximize the tonnage of aggregates produced per day to meet production targets.
11
Kabanov, Alexander, Konstantin Malyshev e Danil Vasiliev. "The improvement of ballast quarry operational efficiency on the basis of optimal provision of ballasting job operation fields". Proceedings of Petersburg Transport University, n. 4 (20 marzo 2019): 536–44. http://dx.doi.org/10.20295/1815-588x-2018-4-536-544.
Testo completoAbstract (sommario):
Objective: To develop a theoretically justified methodology for transshipping process parameters determination as well as to improve ballast quarry operational efficiency on the basis of optimal provision of ballasting job operation fields. Methods: Operation of crushed quarries and ballasting facilities was studied through the methods of mathematical statistics as well as correlation analysis of technical and economic as well as organizational process parameters. Results: Areas of effective interaction of ballast quarries and ballasting facilities were determined. Operation lengths of shuttle-service trains running with engineering materials from loading terminal to detraining point were optimized. Effective load values of shuttle-service trains were estimated. The results are presented in table and graphic forms. Practical importance: Effective cost value area for ballast materials is recommended in contractors for practical application. Profitability of deliveries from crushed quarries was improved by providing ballasting job operation fields; guidelines on bedding of lines at railway stations and station blocks were developed as well as standards for October railway were introduced.
12
Gentry, Rozer L., N. E. Bin, ErinC Gentry e JeffreyF Gilman. "RESPONSES OF NORTHERN FUR SEALS TO QUARRYING OPERATIONS". Marine Mammal Science 6, n. 2 (aprile 1990): 151–55. http://dx.doi.org/10.1111/j.1748-7692.1990.tb00237.x.
Testo completo
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M., Vijayakumar, e Jeshtin M. "A cross sectional study of the morbidity pattern among stone quarry workers and their associated risk factors". International Journal Of Community Medicine And Public Health 8, n. 9 (27 agosto 2021): 4451. http://dx.doi.org/10.18203/2394-6040.ijcmph20213551.
Testo completoAbstract (sommario):
Background: Construction sector is a thriving industry which comprises most of the unorganized workers and providing widespread opportunities for employment of most of the poorest and marginalized sections of society in India. The workers are more susceptible to various occupational hazards due to working conditions in dusty environment. This study is proposed to identify the morbidity pattern, availability and usage of safety measures, health care seeking behaviour and health care facilities at the quarry site.Methods: A cross sectional study was conducted among the stone quarry workers of Maduranthakam area in Kancheepuram district from February 2018 to May 2018. The sample size was calculated as 94 and five quarries were selected randomly. The study tool was interview based semi structured questionnaire and clinical examination. Appropriate descriptive and inferential statistics like Chi square test, Fischer’s exact test was done to determine significant association (p<0.05).Results: The common morbidities among the participants were abdominal conditions (54%), injuries (34%) and musculoskeletal disorders (27%). One in five individuals had respiratory problems and those with breathing difficulty had decreased peak expiratory flow rate. Usage of personal protective equipments is low and about 63.8% of them were using government health care facilities.Conclusions: Increasing demand for stone and aggregates has led to extensive stone quarrying operations. Awareness and enforcement of personal protective equipment, vaccination against diseases like tetanus, periodic health check- ups should be enforced for people working in quarries.
14
Herceg, Vjekoslav, Mario Klanfar, Karolina Herceg e Dubravko Domitrović. "SPECIFIC ENERGY CONSUMPTION OF MATERIAL HANDLING BY EXCAVATOR IN THE QUARRYING OF CRUSHED STONE". Rudarsko-geološko-naftni zbornik 38, n. 1 (2023): 83–92. http://dx.doi.org/10.17794/rgn.2023.1.8.
Testo completoAbstract (sommario):
A hydraulic excavator is widely used in crushed stone quarries to perform many different operations. Previous research on material handling by excavators is most often based on laboratory testing and observation of soil materials and the digging forces in them. These results are very difficult to transfer to fieldwork during the quarrying process. Therefore, in this work, the energy consumption of an excavator while working in typical materials for a crushed stone quarry was investigated. The field measurements were performed on overburden, blasted rock material, boulders, and two different crushed materials. Energy consumption was observed only during the portion of the cycle in which the bucket digs the material. In this way, the energy consumption was mainly related to the properties of the material. The highest energy consumption was found for blasted rock material, lower in overburden, and the lowest for boulders and crushed materials. These results are important for organizing an optimal distribution of machines according to the work tasks in the quarry and ultimately for energy savings.
15
Kittipongvises, Suthirat. "Assessment of Environmental Impacts of Limestone Quarrying Operations in Thailand". Environmental and Climate Technologies 20, n. 1 (27 novembre 2017): 67–83. http://dx.doi.org/10.1515/rtuect-2017-0011.
Testo completoAbstract (sommario):
Abstract Environmental impacts of the mineral extraction have been a public concern. Presently, there is widespread global interest in the area of mining and its sustainability that focused on the need to shift mining industry to a more sustainable framework. The aim of this study was to systematically assess all possible environmental and climate change related impacts of the limestone quarrying operation in Thailand. By considering the life cycle assessment method, the production processes were divided into three phases: raw material extraction, transportation, and comminution. Both IMPACT 2002+ and the Greenhouse Gas Protocol methods were used. Results of IMPACT 2002+ analysis showed that per 1 ton crushed limestone rock production, the total depletion of resource and GHGs emissions were 79.6 MJ and 2.76 kg CO2 eq., respectively. Regarding to the four damage categories, ‘resources’ and ‘climate change’ categories were the two greatest environmental impacts of the limestone rock production. Diesel fuel and electricity consumption in the mining processes were the main causes of those impacts. For climate change, the unit of CO2 eq. was expressed to quantify the total GHGs emissions. Estimated result was about 3.13 kg CO2 eq. per ton limestone rock product. The results obtained by the Greenhouse Gas Protocol were also similar to IMPACT 2002+ method. Electrical energy consumption was considered as the main driver of GHGs, accounting for approximately 46.8 % of total fossil fuel CO2 emissions. A final point should be noted that data uncertainties in environmental assessment over the complete life cycle of limestone quarrying operation have to be carefully considered.
16
Rudenko, Yu F., V. M. Shestopalov, Iu A. Negoda e O. V. Gural. "ASSESSMENT OF CHANGES IN THE HYDROGEOLOGICAL CONDITIONS CAUSED BY WET-BASED CONSERVATION OF THE STYLSKYI QUARRY OPERATED BY “DOKUCHAEVSK FLUX AND DOLOMITE COMPLEX” PJSC USING MATHEMATICAL MODELLING". Geological Journal, n. 3 (8 ottobre 2021): 17–34. http://dx.doi.org/10.30836/igs.1025-6814.2021.3.237248.
Testo completoAbstract (sommario):
Extraction of minerals significantly affects the hydrogeological conditions of the environment. Active development of mining operations in the Donbas region determined the dominant influence of technogenic changes in geological environment on the formation of modern ecological conditions in the region. This applies not only to coal mining but also raw materials extraction (dolomites, limestone) for metallurgical plants mostly by quarrying. Recently, a significant environmental problem in the region has been the mines and quarries closure, envisaged by the program for restructuring the coal industry of Ukraine. Closure of mines or quarries through wet-based conservation is the least financially expensive, although it significantly increases the technogenic load on the natural environment. The object of research involved groundwater and surface water within the area of the Stylskyi and Skhidnyi (Vostochnyi) quarries of the “Dokuchaevsk flux-dolomite complex” PJSC, as well as Kipucha Krynytsa and Shevchenkivskyi water intake structures. The goal of research was to forecast changes in the hydrogeological conditions under the influence of wet-based conservation of the Stylskyi quarry. To achieve this goal, hydrogeological methods, mathematical modelling, and expert assessments were used. Consequently, a hydrogeological model of the research area was created, its functional correspondence to the natural-anthropogenic conditions was confirmed, and calculation hydrogeological parameters were specified. As a result, the forecast of changes in the hydrogeological conditions under the influence of wet-based conservation of the Stylskyi quarry was made. In particular, the following issues were determined: the dynamics of quarry flooding; the influence of this process on changes in water inflows to the Skhidnyi (Vostochnyi) quarry, Kipucha Krynytsa and Shevchenkivskyi water intake structures; possible flooding of settlements and swamping of the research area; changes in chemical composition and groundwater salinity; time of quarry draining at various intensity of water outflow to resume mineral production in case of need. We would like to emphasize that the forecasts made should be used when designing partial or full flooding of the Stylskyi quarry.
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Mikaeil, Reza, Akbar Esmaeilzadeh, Sara Aghaei, Sina Shaffiee Haghshenas, Amir Jafarpour, Javad Mohammadi e Mohammad Ataei. "EVALUATING THE SAWABILITY OF ROCKS BY CHAIN-SAW MACHINES USING THE PROMETHEE TECHNIQUE". Rudarsko-geološko-naftni zbornik 36, n. 1 (2021): 25–36. http://dx.doi.org/10.17794/rgn.2021.1.3.
Testo completoAbstract (sommario):
One of the most significant factors in the estimation of dimension stone quarry cost is the production rate of rock cutting machines. Evaluating the production rate of chain-saw machines is a very significant and practical issue. In this research, it has been attempted to evaluate and select the suitable working-face for a quarry by examining the maximum production rate in the Dehbid and Shayan marble quarries. For this purpose, fi eld studies were carried out which included measuring operational characteristics of the chain-saw cutting machine, the production rate and sampling for laboratory tests from seven active case studies. Subsequently, the physical and mechanical properties of rocks including: Uniaxial Compressive Strength (UCS), Brazilian Tensile Strength (BTS), Los Angeles abrasion, quartz content, water absorption percentage, porosity, Schmidt hardness and grain size for all sample measurements were studied after transferring the samples to a rock-mechanics laboratory. Finally, the sawability of the quarried working-faces was evaluated using the PROMETHEE multi-criteria decision-making (MCDM) model according to the physical and mechanical properties. The results of the study indicated that the number 1 and 5 working-faces from the Dehbid and Shayan quarries are the most suitable working-faces in terms of production rate with the maximum recorded production values (4.95 and 3.1 m2 /h), and with net fl ow rates (2.67 and -0.36) respectively.
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Sanina, Irina, e Natalia Konstantinovskaya. "Features identification of quarry explosions in the central part of the East European Platform according to the data of the small-aperture group “Mikhnevo”". Russian Journal of Seismology 4, n. 2 (28 giugno 2022): 23–32. http://dx.doi.org/10.35540/2686-7907.2022.2.02.
Testo completoAbstract (sommario):
The features of the location and identification of mass explosions produced at quarries in the central part of the East European Platform associated with changes in the regulations for blasting operations, according to observations at the small-aperture seismic group “Mikhnevo” IDG RAS, are considered. Descriptions of wave forms from explosions at the largest quarries of the Belgorod and Kursk regions are given. The analysis of the identified “anomalous” mass explosions at quarries is given. The “atypical” wave forms and the time of blasting operations are considered. The possible negative consequences for the objects of the national economy and especially responsible buildings and structures located in the immediate vicinity are indicated.
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Chaurasia, Ram Sharan, e Surya Narayan Mohapatra. "Temporal status and change detection of stone quarrying and crushing activities using multi-temporal google earth images". Journal of Geomatics 17, n. 1 (28 aprile 2023): 12–21. http://dx.doi.org/10.58825/jog.2023.18.1.71.
Testo completoAbstract (sommario):
Stone quarrying and crushing (SQC) activities under mining operations normally produce a destructive landscaping impression during the period from start to end. Spatio-temporal data, downloaded from Google Earth Pro s/w, coupled with remote sensing, GIS, and GPS has been used to evaluate time series (2003, 2008, 2015 and 2021) analysis of stone quarrying and crushing activities in a part of Jhansi Tehsil. Results shows that the variability and pressure on land resources due to stone quarry and crushing activities were found linear increments during the time. There was annual heavy exploitation record during 2003-2008 (30.83%) of stone from quarry sites and total increments of SQC activities were found 277.64% since last 18 years. This study exhibited the prospective advantage of annual monitoring over period and support to make the possible preparations/ management for destructive mining operations. This study exhibited the prospective advantage of annual monitoring over period and support to make the possible preparations/ management for destructive mining operations.
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Kaykov, Dimitar, Danail Terziyski, Kremena Arsova-Borisova e Milan Stajić. "A NON-LINEAR OPTIMISATION APPROACH TO IN-PIT HAUL ROAD DESIGN". Sustainable Extraction and Processing of Raw Materials 4, n. 4 (1 agosto 2023): 47–57. http://dx.doi.org/10.58903/u17190831.
Testo completoAbstract (sommario):
Truck haul costs, as one of the predominant operational costs for mining and quarrying operations, are known to be heavily dependent on the design parameters of haul roads. Furthermore, in-pit haul road design parameters determine the pit limits and therefore, the potential feasibility of the mining operation. Thus, when in search of an optimal solution in terms of in-pit haul roads, one should primarily consider the location of the in-pit haul road, its design features and the deriving operational costs regarding extraction and haul costs. A suitable objective function in this case may be the undiscounted profit for the ultimate pit design. However, for each considered scenario, truck and excavator operational costs can be calculated using simulation techniques for better accuracy. Furthermore, finding an optimal solution requires the execution of a reliable and efficient algorithm, depending on the shape of the objective function. Hence, a non-linear optimisation approach was proposed in this paper for solving the in-pit haul road optimisation problem, based on a simulation of the materials allocation, which was used for calculating the objective function. Design parameters were assumed to be predetermined, while the only variable used for finding an optimal solution was the location of the in-pit haul road inside the pit contour. In addition, two 1-D algorithms were compared for finding the optimal solution (Search with accelerated step size and 1-D Simplex method). Furthermore, two regression models are proposed (Multiple Linear Regression – MLR and Non-Linear Regression - NLR), which could identify the more feasible region for the in-pit haul road location and reduce the number of iterations required for convergence.
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Tanushree Mahapatra. "Environmental, social and health impacts of stone quarrying in Mitrapur panchayat of Balasore district, Odisha". International Journal of Science and Research Archive 8, n. 1 (28 febbraio 2023): 678–88. http://dx.doi.org/10.30574/ijsra.2023.8.1.0142.
Testo completoAbstract (sommario):
Excessive demand for stones due to rapid infrastructure development led to uncontrolled stone quarrying in Mitrapur panchayat of Balasore district causing serious environmental degradation and socio-economic conflict. A large numbers of tribal people of this area are dependent on stone quarrying activities for carrying their livelihood. Methodology include field observation, photo documentation and interview of local people through a predesigned structured questionnaire to know the local people perception about the impacts of quarrying. This current study was conducted through collection of data from local people of five villages namely, Chatrikhunta, Chandipur, Patana, Kathagochhi and Jamudiha of Mitrapur panchayat of Balasore. Majority tribal people of study area (53%) depends upon quarrying activity for their livelihood. Many local people complained about various negative effects of stone quarrying activities. A vast majority of respondent stated that they suffered severely from the noise pollution caused from the stone quarry related activities (83%). Major source of noise pollution were stone crushers (54%), transport of material by truck/dumper/ tractor (24%) and use of dynamite in blasting operation in quarry (22%). About 40% respondent complained about the impact of dust pollution on agriculture. The availability of water resources in the study area varied from site to site. Many health impacts like bodily pain, eye infection, sleepless nights, headache, cough and chest pain have been reported due to engagement in stone quarrying. In spite of its contribution towards development, quarrying is also responsible for several negative environmental and socio-economic impacts, particularly when quarrying activity is carried out haphazardly.
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Kaur, Olufemi Julius Ayodele. "Heavy Metal Pollution Assessment of Granite Quarrying Operations at Ikole-Ekiti, Nigeria". International Journal of Environmental Monitoring and Analysis 2, n. 6 (2014): 333. http://dx.doi.org/10.11648/j.ijema.20140206.16.
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Melodi, M. M. "Assessment of the Operations of Stone Crushers in Artisanal and Small Scale Granite Quarries". Advanced Materials Research 367 (ottobre 2011): 575–80. http://dx.doi.org/10.4028/www.scientific.net/amr.367.575.
Testo completoAbstract (sommario):
Estimation of the respective productivities of men and women stone crushers in Artisanal and Small Scale Granite Quarries was carried out by collecting data from sample sites and conducting statistical treatment of collected data. An analysis of the results shows that the productivities of men and women stone crushers are 1.1 and 0.6 tonnes per day. Based on these results, a rating scale of output and required manpower in Artisanal Granite quarries was developed using interval and nominal rating methods.
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Galaida, K. P., e B. L. Talgamer. "A study of the impact of climate on the self-growth of limestone quarries". XXI Century. Technosphere Safety 6, n. 2 (8 luglio 2021): 211–20. http://dx.doi.org/10.21285/2500-1582-2021-2-211-220.
Testo completoAbstract (sommario):
Small limestone quarries are located everywhere. After mining operations have been completed, they are not recultivated and left for self-growing. In order to assess the process of vegetation cover restoration, field studies were conducted at 6 quarries located in different climatic zones of Eastern Siberia and Abkhazia. A description of the quarries was made, and areas of disturbed land were identified. The impact of various factors on the self-growth was studied, including the mining parameters, the size of quarries, the height of ledges, the width of berms, the angles of slopes, the composition of rocks in the surface layer, the exposure of slopes, and the composition of surrounding plants. The research identified factors that have positive and negative effects on the intensity of self-growth; recommendations for forming non-working boards were provided. Mining operations without the implementation of reclamation measures aimed to create favorable conditions for the self-overgrowing of disturbed lands, impair the process of vegetation restoration and entail long-term erosion processes, despite the favorable conditions of the subtropical climate of Abkhazia. The available solutions for land reclamation in Siberian quarries can be implemented in other climatic zones.
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Umirzokov, A. M., K. T. Mambetalin, S. S. Saydulozoda e A. L. Berdiev. "EFFICIENCY ASSESSMENT OF ROAD OPERATION IN THE MOUNTAIN QUARRIES". Труды НГТУ им. Р.Е. Алексеева, n. 1 (2021): 98–105. http://dx.doi.org/10.46960/1816-210x_2021_1_98.
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Frascá, Maria H. B. O. "Considerations on Granite Dimension Stone Porosity and Modifications from Quarry to Slabs". Key Engineering Materials 548 (aprile 2013): 124–31. http://dx.doi.org/10.4028/www.scientific.net/kem.548.124.
Testo completoAbstract (sommario):
This paper presents the physical and petrographic characterization of selected granitic rock types from several quarries in Brazil and aims to contribute to a better knowledge of the engineering properties of granite dimension stone, focusing on laboratory physical determinations and the possible changes that would occur along processing operations, i.e., from the quarried rock to the polished slabs or tiles. The tests – petrography and porosity determinations – led to the collection of parameters of in natura and processed rock material, respectively from specimens obtained from small cubic blocks and polished slabs, situations considered representative of the stresses to which the rock is submitted to during the several processing stages. The results indicated that porosity tends to be higher for “tiles” than for “blocks”, and that “S-type granites” have higher porosity/open-pores values than “ordinary granites”, mainly due to their conspicuous microcracking. Moreover, in spite porous configuration may be modified during stone processing, it was found that such changes are not homogeneous and intrinsically associated to the petrographic characteristics, as previous microcracking and alteration states. Finally, as the new physical conditions, acquired after processing, may influence the stone durability, it is strongly suggested that they should be taken into account, as an additional criterion, to the cladding or flooring natural stone selection and specification.
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Melentyev, A. A. "Agricultural land plot reclamation of citrogypsum sediment pool on Belgorod city territory". IOP Conference Series: Earth and Environmental Science 1112, n. 1 (1 dicembre 2022): 012144. http://dx.doi.org/10.1088/1755-1315/1112/1/012144.
Testo completoAbstract (sommario):
Abstract One of the main society tasks with the rapid development of industry is assigned to nature protection and correct use of natural resources. Therefore, a significant role is put to the hands of land use. Today, the mining industry in the Russian Federation is characterized by huge volumes of mining. The main production is carried out mainly due to the open method of work. The negative consequences of such developments are: taking of large land areas from the economic turnover, their violation in the course of work; changes in hydrogeology and landscapes; development of erosion processes, etc. Thus, as a result of mining operations, the areas of land disturbed by such developments, processing waste and mucks of rocks are rapidly increasing. Moreover, when mucks are formed, unnecessary rocks are mucked, without taking into account their suitability for reclamation, and when creating external mucks, the requirements of rational farming are not always taken into account. As a result, these lands become barren and negatively affect the environment. It follows from this that lands disturbed by open pit mining must be returned to economic circulation with minimal losses and the creation of favorable conditions for the environment. The work relevance lies in the study of work on the land restoration in quarries during their development and extraction of raw materials for construction purposes. Reclamation provides for the restoration of lands disturbed by quarrying, as well as the preservation of the already restored land.
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Kibii, Caroline J., e Isaac J. Ndolo. "Effects of Adherence to Environmental Rules and Regulations in Stone Quarrying at Tuluongoi Sublocation of Baringo County, Kenya". Journal of Sustainability, Environment and Peace 4, n. 2 (8 dicembre 2021): 74–81. http://dx.doi.org/10.53537/jsep.2021.12.003.
Testo completoAbstract (sommario):
Stone quarrying has been recognized as a socioeconomic activity serving as a fundamental source of livelihood for some communities. Nonetheless, most operations are often accompanied by adverse effects on the same communities and the environment. The objective of this study was to determine the level of awareness of environmental rules, regulations, and principles governing stone quarrying in Tuluongoi sublocation, Tenges Division, Baringo County. The study also sought to establish whether there is a linkage between awareness of environmental rules, principles, and regulations governing stone quarrying and the impacts on the environment. Two villages were chosen for the study. The stratified sampling procedure was used to pick 120 households from the two villages, the total number (97) of regular quarry workers was enumerated, and purposive sampling was used to select six key informants. The quarry workers and household heads were the primary units for data collection. Primary data were collected by using questionnaires, in-depth interviews, observations, and pictorials. Secondary data were obtained from census reports, peer-reviewed journals, county strategic plans, unpublished theses, and scholarly books. Some data were analysed using descriptive statistics such as frequencies and percentages, while the SPSS software was used to generate tables, graphs, and frequencies. The chi-square procedure was used to test whether the awareness of environmental rules and regulations on stone quarrying were significantly independent of environmental degradation at the 0.05 significance level. The study established that 55.1% of quarry workers and 65% of household heads were unaware of any environmental rules, regulations, and principles governing stone quarrying. Out of those aware, 88.9% of household heads and 67.7% of quarry workers had poor awareness of environmental regulations and requirements. The study recommends that National Environment Management Authority promotes and enforces environmental rules, regulations, policies, and principles governing stone quarrying in collaboration with the relevant county government departments by enhancing awareness among the residents.
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Sandrigailo, Igor, Stepan Arefiev e Sergei Chebotarev. "Determination of operation parameters and indicators of surface miners in marble quarrying". Вестник Пермского национального исследовательского политехнического университета. Геология. Нефтегазовое и горное дело 21 (2016): 362–66. http://dx.doi.org/10.15593/2224-9923/2016.21.8.
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STEPUK, Oleg G., Alexander M. NASKOVETS, Vladimir I. MOISEENKO e Aleksandr G. SIDORENKO. "DEVELOPMENTS IN LAYOUT AND INCREASING OF TRANSVERSE STABILITY OF MINING DUMP TRUCKS OF EXTRA HIGH LOAD CAPACITY". Mechanics of Machines, Mechanisms and Materials 4, n. 53 (dicembre 2020): 28–34. http://dx.doi.org/10.46864/1995-0470-2020-4-53-28-34.
Testo completoAbstract (sommario):
Main feature of modern mining dump trucks is the need to ensure the transportation of minerals with minimal costs, which is achieved by deepening the quarries (in order to save overburden), increasing the slopes of roads, reducing the distance of cargo transportation, increasing the load capacity of machines and improving the safety of their movement. It is shown that new work conditions of dump trucks and major specific requirements are resolved mainly at the stage of layout of machines by optimizing wheel arrangement of dump trucks, loading of tires and their performance, providing specific power of the propulsion system, choice of the transmission type and its units, and major systems to ensure operational safety: brakes, steering, stability of motion. Special attention is paid to the creation of a new system for improving lateral stability and its design for dump trucks with a load capacity of more than 400 t. The results of operational studies of the main layout and design solutions adopted for a dump truck with a load capacity of 450 t are presented. Efficiency of the decisions made is shown which made it possible to create a mining dump truck superior to all analogues in the world by indicators of the main operational properties that ensure competitiveness: fuel efficiency, performance, and operating costs. A system created for the first time for increasing lateral stability (schematic diagram and structural elements) confirmed the projected traffic safety in typical quarries and the necessary life in operation.
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Kolesnikov, Valery F., Oleg I. Litvin e Viktor L. Martyanov. "THE FEATURES OF CURRENT MINING OPERATIONS PLANNING AT CENTRAL KUZBASS QUARRIES". Vestnik of Kuzbass State Technical University 131, n. 1 (2019): 95–100. http://dx.doi.org/10.26730/1999-4125-2019-1-95-100.
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Regotunov, Andrey, Rudolf Sukhov e Gennady Bersenyov. "About transition processes in blasthole drilling at quarries". E3S Web of Conferences 177 (2020): 01008. http://dx.doi.org/10.1051/e3sconf/202017701008.
Testo completoAbstract (sommario):
As a system, the mining enterprise develops under constantly changing conditions of the external and internal environment. These conditions affect the state of the most important drilling subsystem: blasthole drilling technology, safety, performance, power consumption of the boring rigs and roller bits used. The main transition processes as necessary responses of the subsystem to changing conditions were identified as a result of fragmentary data analysis showing decisions taken over the past 15-20 years, which increase drilling activity efficiency and safety of smaller quarries of Russia, which contain a significant amount of material resources. The main transition processes contribute to the growth of drilling performance and consist of changing the following: bit design for specific rocks; drilling method; drilling mode; boring rig design; controlled parameters of drilling process and rock properties redetermination; parameters of maintenance and repair system. Based on the performed analysis, the systematization results of the main factors predetermining the need for transition processes implementation in the “drilling operations” subsystem were obtained and presented. The proposed approach allowed to reveal a holistic picture of the main interacting factors in the “drilling operations” subsystem. Based on the factors systematization presented in the article it is possible to envisage changes of individual factors depending on changes of other factors, not functionally related directly when planning drilling operations.
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Adebayo, B., e A. E. Aladejare. "Effect of Rock Properties on Excavation-Loading Operation in Selected Quarries". Advanced Materials Research 824 (settembre 2013): 86–90. http://dx.doi.org/10.4028/www.scientific.net/amr.824.86.
Testo completoAbstract (sommario):
The effect of rock properties on excavation-loading operation in quarries was investigated by conducting test on the mechanical properties of selected rocks. These rock samples were tested in the laboratory for specific gravity, point load strength, uniaxial compressive strength and mineral composition using weigh balance, point load tester, 1100kN compression machine and petrological microscope respectively. The filling rates of the front end loaders bucket were determined. The result obtained show that value of uniaxial compressive strength varied from 29.22 MPa-30.87 MPa. The bucket filling rate varied from 0.180-0.250 m3/s and 0.145-0.170 m3/s for porphyritic biotite granite and coarse biotite granite respectively. There is strong relationship between bucket filling rate and strength properties with values of R2 ranging from 0.9737 to 0.9981.Therefore strength parameters of the rock have effect on excavation loading operation in quarries.
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Pandula, B., J. Kondela, I. Buchla e J. Baulovič. "METHODOLOGY OF SEISMIC BLASTING IN QUARRIES". International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVI-5/W1-2022 (3 febbraio 2022): 165–69. http://dx.doi.org/10.5194/isprs-archives-xlvi-5-w1-2022-165-2022.
Testo completoAbstract (sommario):
Abstract. Blasting induced vibration is one of the fundamental problems in the quarries and intense vibration can cause critical damage to environment nearby the quarries. Blasting operations generate seismic waves with different maximum particle velocity and wide spectrum of frequencies. This process depends on the properties of the rocks, properties of charges and technology of blasting. It is very important to study how to control vibration induced by blasting in the mitigation of negative effects of blasting in quarries. Maximum values of the particle velocity are depended on great number of different factors. The article presents the results of the analysis as well as an evaluation methodology of seismic safety of the objects during blasting work held by the seismic waves’ attenuation law and milisecond timing. Methodology of the evaluation of seismic effects of blasting are base for evaluation of the effects of seismic blasting in quarries in Slovakia.
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Герасимова, Катерина. "ВЛАСТИВОСТІ СПЕЦІАЛЬНОГО, МОДИФІКОВАНОГО ЗАЛІЗОМ БЕТОНУ, В УМОВАХ ДИНАМІЧНИХ ВПЛИВІВ". European Science, sge15-01 (30 dicembre 2019): 25–50. http://dx.doi.org/10.30890/2709-2313.2022-15-01-009.
Testo completoAbstract (sommario):
In the process of operation, the structures of buildings and structures perceive dynamic influences that arise as a result of the operation of technological and other equipment, as well as demolition work in quarries and mines located near enterprises
36
Isakov, Bakhitzhan, e Mykhailo Chetveryk. "Perspective trends for the development of cycle-flow technology in deep quarries taking into account the structure of their working area". Geo-Technical Mechanics, n. 159 (2021): 89–95. http://dx.doi.org/10.15407/geotm2021.159.089.
Testo completoAbstract (sommario):
Over the past 20 years, the parameters of the working zone of deep quarries have changed, which began to consist of sections of inclined and steep sides. At a number of deep iron ore quarries, temporary internal dumps of overburden rocks began to be created in the working area, which influences the choice of schemes for opening deep horizons in cyclic-flow technology (СFT). The purpose of the study is to substantiate promising directions for the development of CFT in deep iron ore quarries, taking into account the structure of their working area and the use of steeply inclined conveyors (SIC). It is shown that with certain parameters of a large piece transported by the conveyor belt, contained in the transported rock mass, and its certain kinetic energy, stable operation of the system, widely used steeply inclined and inclined conveyors, is achieved. The parameters of a steeply inclined conveyor when transporting rocks with a high density were determined. It is assumed that with the same kinetic energy of a piece (ore, rock) contained in the transported rock mass, stable operation of a steeply inclined conveyor will be ensured. Based on this, the parameters of the transported piece and the parameters of the steeply inclined conveyor are determined. According to the maximum size of the pieces that come after crushing in a cone crusher for coarse crushing on a steeply inclined conveyor, its stable operation is ensured at a density of transported rocks of not more than 2.8 t/m3. The economical use of SIC is achieved by combining the cyclic-flow technology with SIC and with the technology of pre-enrichment of ore in a quarry. For these conditions, the use of cyclic-flow technology with steeply inclined and inclined conveyors is justified. The structure of the working zone of a deep quarry with gentle and steep sides is considered. For these conditions, rational schemes for the opening of horizons with steep sides of the open pit and the use of temporary internal dumps was developed. The depth of the quarry, at which it is necessary to introduce a new opening scheme, was established. It is shown that the time of transition to the next opening scheme is significantly affected by the productivity of the quarry and the rate of decrease in mining operations.
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Uteshov, Yerzhan, Daniyar Galiyev, Seitgali Galiyev, Kanay Rysbekov e Dilda Nаuryzbayeva. "Potential for increasing the efficiency of design processes for mining the solid mineral deposits based on digitalization and advanced analytics". Mining of Mineral Deposits 15, n. 2 (2021): 102–10. http://dx.doi.org/10.33271/mining15.02.102.
Testo completoAbstract (sommario):
Purpose. The research purpose is to develop and adapt the existing scientific-methodological, as well as software and information base for managing the geotechnological complexes to implement the process approach at the level of design and operation of mining-and-transport complexes during opencast mining. The development is associated with the coverage of more and more relevant options for excavating-conveying, as well as excavating-automobile-conveying mining-and-transport systems used in quarries. Methods. The methodology for managing the geotechnological complexes involves an adequate step-by-step accounting and appropriate operational regulation of all the main factors in specific mining-engineering, mining-geometrical, mining-and-geological, economic and organizational conditions. The method of simulation logical-statistical modelling of mining-and-transport processes is used as the main method. Findings. The results indicate that simplified analytical approaches and inadequately considered factors that have a significant impact on the efficiency of mining operations lead to significant errors (10-20% or more) that determine the real practical profitability of the mineral deposits development. Originality. Scientific novelty is an integrated approach to a single research object, which is a geotechnological complex, a unique simulation logical-statistical modelling of mining-and-transport processes, the economics of process management, as well as integrated and corporate process management. Practical implications. The obtained results of an integrated technical and technological audit of a project for mining the coal deposit, with sufficient accuracy for practical application, will ensure the methodological base development for the designing, planning and management of mining and mining-transport operations, as well as an increase in the efficiency of scientific and scientific-practical research in this direction when solving the practical tasks of mining sector.
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Galaida, K. P., e B. L. Talgamer. "Assessment of self-healing of mines at the limestone quarry in Inkerman, Crimean Peninsula". XXI Century. Technosphere Safety 7, n. 1 (30 marzo 2022): 75–84. http://dx.doi.org/10.21285/2500-1582-2022-1-75-84.
Testo completoAbstract (sommario):
Limestone quarries, widespread throughout the Crimean Peninsula, are not recultivated after mining operations, which has a negative impact on the environment. The purpose of the study is to evaluate the self-healing process for mines at limestone quarries on the Crimean Peninsula. To assess the current state of mines and self-healing processes, field studies were conducted at the Inkerman saw limestone quarry. Using remote sensing resources, the areas of disturbed lands were determined. The route method made it possible to make floristic descriptions of vegetation. The influence of various factors on the self-healing of, including mining parameters, the size of quarries, the height of ledges, the width of berms, the angles of slopes, the composition of rocks in the surface layer, has been studied. The influence of the slope angles on the self-healing process was determined and their permissible values were justified; the hydrological conditions of the deposit were estimated. Factors affecting the intensity of self-healing were established. Radical changes in the landscape, destruction of flora and fauna, soils, a sharp decrease in the biological productivity of the territory, deterioration of sanitary and hygienic and aesthetic living conditions caused by the manmade relief were observed. Potential for the development of industrial limestone production and conditions for self-healing of the disturbed lands were evaluated. When completing mining operations, it is recommended to leave a layer of loose sediments with a capacity of 0.4–0.5 m on the rocky foundations (bottom and berms of ledges), including from destroyed minerals, and to form non-working sides of quarries by doubling and straining the ledges with simultaneous expansion of the berm while maintaining a stable slope angle.
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Loginova, I., O. Kruzhilko e D. Vinivitin. "INVESTIGATION OF THE NEED TO ADJUST THE ROADS DESIGN STANDARDS OF IN QUARRIES". Labour protection problems in Ukraine 36, n. 1 (31 marzo 2020): 22–28. http://dx.doi.org/10.36804/nndipbop.36-1.2020.22-28.
Testo completoAbstract (sommario):
The purpose of this work is to justify the need to adjust the standards for designing roads in quarries, taking into account the Rules of labour protection in the development of minerals in an open way. The study is based on domestic (experience in Poltava GOK, Yeristovsky GOK) and foreign (mining enterprises in Australia, USA, Canada) practical experience in operating heavy-duty mining vehicles, as well as on a systematic analysis of current norms for technological design of roads in quarries. An analysis of the regulatory and legal issues related to the safety of operation of heavy-duty mining vehicles showed that the Ukrainian standards for designing roads in opencast mines have not changed 25 years. At the same time, the fleet of technological dump trucks used in quarries, technical characteristics, capabilities and prospects for their use, have significantly changed. The study and identification of the advantages of using roads with a constant slope without the installation of horizontal platforms provides the basis for developing recommendations for updating the design standards for roads in open pits, as the current standards do not meet the requirements for the safe operation of modern heavy-duty mining vehicles. It is proposed to update regulatory legal acts by reviewing them with corrective amendments, taking into account the appropriate level of safety when using heavy trucks. Implementation of the proposed standards to improve the transport scheme of the quarry will contribute to the safe operation of heavy mining vehicles.
40
Konstantinovskaya, N. L., A. G. Goev e T. V. Danilova. "Possible consequenses of the technogenic seismic impact on geological environment of the central part of East European craton from the small-aperture seismic group «Mikhnevo»". Moscow University Bulletin. Series 4. Geology, n. 6 (6 febbraio 2023): 95–109. http://dx.doi.org/10.33623/0579-9406-2022-6-95-109.
Testo completoAbstract (sommario):
The results of natural and man- made seismicity long-term observations on the Eastern European Platform (EEP) according to the data of the small-aperture seismic group (MSG) “Mikhnevo” IDG RAS are summarized. It is shown that technogenic seismicity is dominant in this area. Descriptions of wave forms from blasts at the largest quarries of the Belgorod and Kursk regions are given. Special attention to the assessment of energy from explosions produced at numerous relatively small quarries located in the central part of the EEP is paid. The energy assessment of the total technogenic impact on the environment is given. The results of registration and location of natural-tectonic events that occurred on the territory of the central part of the EEP, previously considered aseismic, are shown. The negative impact on the territories located near the existing quarries from the resulting dust and gas emissions during drilling and blasting and other mining operations was noted.
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Csikosova, Adriana, Maria Janoskova e Katarina Culkova. "Application of Discriminant Analysis for Avoiding the Risk of Quarry Operation Failure". Journal of Risk and Financial Management 13, n. 10 (28 settembre 2020): 231. http://dx.doi.org/10.3390/jrfm13100231.
Testo completoAbstract (sommario):
Activity in the mining industry is based on the profitability principle similar to other business sectors. In the case of stone pits, gravel and sand quarries, it presents a very complex task, mainly due to the fact that the economy of localities is influenced greatly by natural conditions, which cannot be changed. The presented contribution deals with the problem of how mining companies, realizing the surface extraction of construction materials, could be profitable in the future. The main research method of this contribution presents regression and correlation analyses with the goal of determining parameters with a decisive influence on the future economic development of the locality. A complex system of stone pit, gravel and sand quarries demanded discriminant analysis to evaluate individual localities with the goal of dividing them into profitable and not profitable localities. The results of the contribution divide localities of quarry mining among profitable or not profitable, serving for predicting the future development of the company, based on discriminant analysis. The results of maximally possible measures respect assumptions, enabling the correct application of such multivariate statistical methods. A further orientation of the research in an area of model creation for predicting the future development of the company is possible in the application of logistic regression and neuron nets.
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Makokha, PaulPeter M. "Characteristics of Cottage Industries in Kakamega County, Kenya". International Journal of Human Resource Studies 4, n. 4 (15 novembre 2014): 73. http://dx.doi.org/10.5296/ijhrs.v4i4.6621.
Testo completoAbstract (sommario):
Cottage industries are the home-based units of production which rely on human- or animal-propelled skills and technology. They are characterized by accessibility to raw materials, low costs of operation, and proximity to markets. The cottage industries highlighted in this research paper are: pottery, crude sugar production, brick-making, liquor production, quarrying and masonry, carpentry, traditional medicine production, charcoal production, basketry and weaving, baking, bicycle repair, flour-grinding, and shoe-making and repair.
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Date, William, e Mark Stone. "Queensland’s risk-based petroleum and gas regulator". APPEA Journal 62, n. 2 (13 maggio 2022): S238—S242. http://dx.doi.org/10.1071/aj21084.
Testo completoAbstract (sommario):
Resources Safety & Health Queensland (RSHQ) is the new independent regulator for occupational safety and health in Queensland’s petroleum and gas, mining, quarrying and explosives sector. RSHQ was created by the Queensland Government on 1 July 2020 as a singular focussed statutory body. It is a stand-alone organisation quite separate from its former portfolio Department – the Department of Natural Resources Mines and Energy. RSHQ’s vision is ‘zero serious harm’. In pursuit of this lofty vision – which is defined as operations and activities free from fatality, hospitalisation and confirmed cases of disease – RSHQ applies its regulatory approach which is risk-based and data-driven. This paper outlines the regulator’s approach, values and principles to supporting the upstream petroleum sector in Queensland in order to protect its workers and meet its obligations under law. Importantly, RSHQ compliance principles and practice should be understood by operators, contractors, workers and other key stakeholders in the petroleum sector. Case studies demonstrate the efficacy of this approach as it applies to the construction, operation and decommissioning of wells, gathering systems and plant. Operators, contractors and service companies will significantly benefit from reading and hearing more from the regulator at the APPEA Conference in Brisbane in 2022.
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Regotunov, Andrey, e Vladimir Antonov. "Modelling the development of drilling operations in iron ore quarries (based on Kachkanar MPP)". E3S Web of Conferences 56 (2018): 01011. http://dx.doi.org/10.1051/e3sconf/20185601011.
Testo completoAbstract (sommario):
The necessity of application of quantitative models of drilling operations development in iron ore quarries for the justified planning of drilling volumes and the relevant fleet of drilling rigs has been shown. For this purpose, experimental regression studies of the patterns of formation and development of drilling operations in the transition period of the modern market economy have been carried out using the example of the Kachkanar Mining and Processing Plant, which has typical characteristic features and dynamics of changes in mining production in Russia. Based on the analysis of the annual technical and economic indices of Kachkanar MPP, conclusions have been drawn about the characteristics of the depression period of drilling production in the 1990s and its subsequent growth, coupled with qualitative changes in the fleet of drilling rigs and productivity thereof. In order to establish the relevant quantitative relationships and development forecasts of the drilling operations at the plant, a nonlinear regression model for the distribution of the length of wells drilled per year has been created, depending on the calendar time, the number of drilling rigs and their utilization factor. The model has a high determination factor of 0.9. It is adequate to the errors of the initial indices, it is statistically reliable, and in this confidence interval, it expresses regularities in changes in the annual length of the drilled wells. According to the regularities, interpretation of transient processes and forecast estimates of the development of drilling operations have been provided.
45
Jimeno, Carlos López, Ignacio Díez Torrijos e Carmen Mataix González. "Mines, Quarries and Landscape. Visuality and Transformation". Management Systems in Production Engineering 22, n. 2 (1 giugno 2016): 110–22. http://dx.doi.org/10.2478/mspe-07-02-2016.
Testo completoAbstract (sommario):
Abstract In this paper a review of two basic concepts is carried out: scenery and landscape integration, proposing a new concept: “visuality”, alternative to the classical “visibility” used in landscape studies related to mining activity, which explores the qualitative aspects that define the visual relationships between observer and environment. In relation to landscape integration studies, some reflections on substantive issues are made which induce certain prejudices at the time of addressing the issue of mining operations landscape integration, and some guidance and integration strategies are formulated. In the second part of the text, a new approach to the landscape integration of mines and quarries is raised, closely linked to the concept of visuality which are based on a basic goal: the re-qualification of the place, and give innovative answers to re-qualify the place and show how to catch the opportunity in the deep transformation generated by the development of mining activities. As a conclusion, a case study is presented in the last section, the landscape integration study conducted on marble exploitations Coto Pinos (Alicante, Spain), considered the largest ornamental rock quarry in Europe.
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Makarov, Vladimir, Péter Kovacs, Samuel Dagmar e Riccardo Paulman. "Technological Solutions for Processing Closed Coal Mines by Open Pit Method". E3S Web of Conferences 41 (2018): 01041. http://dx.doi.org/10.1051/e3sconf/20184101041.
Testo completoAbstract (sommario):
The main sources of environmental pollution are: pollution from the residual effects of working out of mine fields by underground method; pollution from secondary mining of mine fields by the open method. The pollution of the environment from the underground mining of mine fields is mainly due to the erosion of the surface of the ditches caused by collapse of the underground workings, spontaneous combustion of the remaining coal reserves and exit of poison gases SO2 and CO to the surface through the cracks from the lower horizons of the worked-out mine fields. This makes actual the research of technological possibilities of harmful emissions reducing when quarrying underground mines’ fields. The environment deterioration from conducting open pit mining operations in the underground mine fields is caused by the technological processes of quarrying (preparation of rock for excavation, excavation, transportation of rocks and coal, dumping), by the objects of the open pit infrastructure (industrial site, transport communications, trenches and other workings, coal storage and rock dumps). The main direction of eliminating the negative environmental consequences of underground mining is the localization or complete isolation of the underground mines influence’ on the surface.
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HORI, Yoshiki. "THE OPERATION PERIOD OF QUARRYING IN THE EASTERN PART OF NAZLAT SUSAYN' ALI IN MIDDLE EGYPT". Journal of Architecture and Planning (Transactions of AIJ) 74, n. 642 (2009): 1911–19. http://dx.doi.org/10.3130/aija.74.1911.
Testo completo
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Çınar, Ibrahim, e Cem Şensöğüt. "Mapping of Noise Propagation in Quarries for Environmental Perspective". International Journal of Economic and Environmental Geology 10, n. 1 (15 aprile 2019): 1–4. http://dx.doi.org/10.46660/ijeeg.vol10.iss1.2019.210.
Testo completoAbstract (sommario):
In this study noise measurements were made in a quarry belonging to a private, company located in the boundaries of Karaomerler village, Konya (Turkey). Noise levels were measured at 42 points, in the operation field and equivalent noise levels were determined and the results were mapped using NetCad program. With the help of the obtained noise maps, it is recommended to take preventive measures, where necessary. Proper reading of maps is crucial for effective and sufficient measures in terms of occupational health and safety measures have to be taken.
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Çınar, Ibrahim, e Cem Şensöğüt. "Mapping of Noise Propagation in Quarries for Environmental Perspective". International Journal of Economic and Environmental Geology 10, n. 1 (15 aprile 2019): 1–4. http://dx.doi.org/10.46660/ojs.v10i1.210.
Testo completoAbstract (sommario):
In this study noise measurements were made in a quarry belonging to a private, company located in the boundaries of Karaomerler village, Konya (Turkey). Noise levels were measured at 42 points, in the operation field and equivalent noise levels were determined and the results were mapped using NetCad program. With the help of the obtained noise maps, it is recommended to take preventive measures, where necessary. Proper reading of maps is crucial for effective and sufficient measures in terms of occupational health and safety measures have to be taken.
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Florea, Vlad Alexandru, Dragos Pasculescu e Vlad Mihai Pasculescu. "Reliability and maintainability of scraper conveyor used in coal mining in the Jiu Valley". Mining of Mineral Deposits 15, n. 3 (settembre 2021): 16–21. http://dx.doi.org/10.33271/mining15.03.016.
Testo completoAbstract (sommario):
Purpose.The aim of the study is to determine and analyse causes of faults in the operation of TR-7A scraper conveyor and to estimate the required time for their remediation and select the methods of their prevention and elimination. Methods. The characteristic of a system, such as the scraper conveyor, intended to fulfil its specified function in time and operation conditions, can be studied, theoretically, by determining its operational reliability. This implies the existence of a framework that incorporates several interconnected components of technical, operational, commercial and management nature. The quantitative expression of reliability was based on elements of mathematical probability theory and statistics (exponential distribution law), failure and repair mechanism not being subject to certain laws. Findings. The following TR-7A subassemblies, if defective, could have been the cause of a failure: chains, hydraulic couplings, chain lifters, drive, return drums, some electrical equipment. After 28 months of monitoring the TR-7A operation, we have established the number of failures (defects) ni, the operating time between failures ti, frequency of failures fc, time to repair tri, weight repair time pr, mean time between failures (MTBF), mean time to repair (MTR). Originality.Data collection and processing involves the adoption of specific procedures to allow the correct highlighting of the causes and frequency of failures. The accomplishment of this approach allowed finding the solutions for increasing reliability of some subassemblies of TR-7A conveyor (i.e., those subjected to abrasive wear). Practical implications.One solution was to use materials with compositional and functional gradient in the case of worn surfaces of some subassemblies. It was successfully applied for the chain lifters where a significant increase in the mean time between failures was obtained. The field of application of these materials can be extended to the metal subassemblies of machines and equipment with abrasion wear that occurs both in underground mines and in quarries.