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Artigos de revistas sobre o assunto "QUARRY MINING PROJECTS"
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Mikolas, Milan, Jozef Mikusinec, Jan Abrahamovsky, Jana Dibdiakova, Yulia Tyulyaeva e Jakub Srek. "Activities of a Mine Surveyor and a Geologist at Design Bases in a Limestone Quarry". IOP Conference Series: Earth and Environmental Science 906, n.º 1 (1 de novembro de 2021): 012073. http://dx.doi.org/10.1088/1755-1315/906/1/012073.
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Abstract At the beginning of this article, the main historical milestones of Povážská cementáreň (cement plant) Ladce, a.s. (PCLA) are presented. The main parameters of the Butkov quarry are also specified (sources of the mineral resources) such as the size of the protected deposit area, the mining area, etc. Another part of the article is devoted to proposals for future mining process. There are two projects in connection with the basic investment plan for PCLA modernization. The first one is the preparation of the survey area for limestone - the stages above the current E15 and the other one is the preparation of the survey area for marl - the Moskové locality. Both of these projects were realized in association with Považskň cementáreň, a.s., Ladce and VŠB - Technical University of Ostrava. An integral part of this article based on the project are also simulation of graphic models and diagrams. The last part of the article documents ways of the cooperation of Butkov Quarry and Považskň cementáreň, a.s., Ladce with the public. The management of the Butkov Quarry and Považskň cementáreň, a.s. have come to realize that their cooperation with the public on cultural and social activities helps both, the public and the quarry (include cement plant).
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Strelnikov, Andrew, Sergey Markov, Ludger Rattmann e Dieter Weber. "Theoretical Features of Rope Shovels and Hydraulic Backhoes Using at Open Pit Mines". E3S Web of Conferences 41 (2018): 01003. http://dx.doi.org/10.1051/e3sconf/20184101003.
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Open coal mining companies in Kuzbass (Western Siberia, Russia) constantly face challenges to increase the economic efficiency of mining operations, reduce coal losses and increase profitability. One of the ways to increase the efficiency of open pit mining is to improve the technology for the development of coal-bearing zones of quarry fields on complex structured inclined and steep deposits. At present, the projects for promising deposits have been completed, and a number of operating open pits conduct the development of coal-bearing zones along their entire width by horizontal layers. The excavating and loading equipment for overburden and mining operations in these zones is diverse: quarry rope shovels, hydraulic backhoes or their joint work. When they work together in the coal-bearing zone, the rope shovels extracts the interbeds, and the hydraulic backhoes extract the coal seams. However, such technical solutions are not sufficiently substantiated. The fact is that rope shovels and hydraulic backhoes have their advantages and disadvantages in operating.
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Cherniaiev, Oleksii, Artem Pavlychenko, Oleksandr Romanenko e Yurii Vovk. "Substantiation of resource-saving technology when mining the deposits for the production of crushed-stone products". Mining of Mineral Deposits 15, n.º 4 (dezembro de 2021): 99–107. http://dx.doi.org/10.33271/mining15.04.099.
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Purpose. Scientific substantiation of the expedient depth of mining the non-metallic deposits of rocky minerals on the basis of mathematical and statistical methods, which will ensure resource-saving and rational use of natural resources. Methods. To solve the purpose set, the following methods are used: graphical-analytical – when optimizing the maximum depth of mining the deposits of building materials, and the method of mathematical modeling – for determining the maximum depth of mining the non-metallic deposits with internal dumping. By means of statistical processing according to systematized types of deposits, the patterns of a change in the maximum depth of mining the basic deposits, depending on the main parameters of the quarry field, have been studied. Findings. A new methodology, which is distinguished by taking into account in-pit dumping, has been developed for calculating the maximum depth of granite quarries, which most of all influences the efficiency of mining operations and the value of economic indicators while ensuring the maximum economic effect with the achievement of a rational maximum depth of mining the deposit. A new, theoretically substantiated methodology has been created for determining the maximum depth of mining the mineral deposits for the production of crushed-stone products while providing the resource- and land-saving during the quarry operation. Originality. For the first time for these deposits, the dependence of their maximum mining depth on the main parameters of the quarry field and the place of internal dumping of overburden rocks has been determined. This has become a determining factor in the appropriate mining of deep non-metallic deposits of building materials with internal dumping, which provides a minimal land disturbance. Practical implications. The research results have been tested and implemented in working projects for mining the Liubymivske, Chaplynske, Pervomaiske, Mykytivske, Trykratske and Novoukrainske granite deposits; as a result of additional mining of mineral reserves, their additional increment in the volume from 1 to 48 million m3 is possible, which will ensure 5-40 years of sustainable operation of the mining enterprise.
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Nguyen, Tuan Anh, Viet Van Pham, Nam Xuan Bui, Hoa Thu Thi Le, Hai Thi Le, Bao Dinh Tran e Hanh Minh Thi Le . "Modelisation of fractured rock mass for open pit mining in Vietnam". Journal of Mining and Earth Sciences 61, n.º 5 (10 de outubro de 2020): 80–96. http://dx.doi.org/10.46326/jmes.ktlt2020.07.
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In open pit mining, besides the value of the minerals obtained, the cost of waste rock removal determines the efficiency of the mining operation. The paper introduces the rock mass data processing method and modelisation of fractured rock mass to serve the optimal calculation of technological stages in mining. This code is a discrete fracture network (DFN) code that couple geometrical block system construction based on modelisation stochastic with RESOBLOK simulations. The method of three-dimensional modeling (3D) of the fractured rock mass in the quarry is based on the rock mass data, the geometrical parameters of the open pit mine. From there, the rock mass simulation models were used in the analysis of the stability analysis of open pit benches, the optimization of the blast design parameters at overburden benches, project construction materials, and technology projects for block stone extraction. An application in some open pit mines such as quarries of Vietnam is presented.
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Avezboyev, S., S. Sharipov e K. Xujakeldiev. "Development of projects for recultivation of lands using GIS technologies". IOP Conference Series: Earth and Environmental Science 1138, n.º 1 (1 de fevereiro de 2023): 012019. http://dx.doi.org/10.1088/1755-1315/1138/1/012019.
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Abstract The necessity of reclamation of disturbed lands as a result of mining is substantiated. Disturbed lands lose all economic importance. In addition, they are a source of pollution of soil and air in the adjacent territories, worsen the living conditions of the population and the appearance of the landscape. The technique of drawing up the working projects for the recultivation of disturbed lands as a result of mining by using the GIS software “Panorama” is considered. The use of this software reduces the time needed to complete a project, reduces the costs and improves the accuracy of project calculations. The use of the technique is shown by the example of the recultivation of disturbed lands in the “Kushbulak” plot of the Karakhtay field. Agricultural reclamation with restoration of pastureland use is recommended. It is planned to create a beach zone with a 30 cm layer of sand in the far northwestern section. It is planned to fill the bottom of the quarry with soil to the design level and create a terrace, as well as work on the land area with a fertile soil layer of 20 cm and planning the surface. The efficiency of reclamation in parallel with the use of a mineral deposit is substantiated.
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Zarubin, Mikhail, Larissa Statsenko, Pavel Spiridonov, Venera Zarubina, Noune Melkoumian e Olga Salykova. "A GIS Software Module for Environmental Impact Assessment of the Open Pit Mining Projects for Small Mining Operators in Kazakhstan". Sustainability 13, n.º 12 (21 de junho de 2021): 6971. http://dx.doi.org/10.3390/su13126971.
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This research article presents a software module for the environmental impact assessment (EIA) of open pit mines. The EIA software module has been developed based on the comprehensive examination of both country-specific (namely, Kazakhstan) and current international regulatory frameworks, legislation and EIA methodologies. EIA frameworks and methods have been critically evaluated, and mathematical models have been developed and implemented in the GIS software module ‘3D Quarry’. The proposed methodology and software module allows for optimised EIA calculations of open pit mines, aiming to minimise the negative impacts on the environment. The study presents an original methodology laid out as a basis for a software module for environmental impact assessment on atmosphere, water basins, soil and subsoil, tailored to the context of mining operations in Kazakhstan. The proposed software module offers an alternative to commercial off-the-shelf software packages currently used in the mining industry and is suitable for small mining operators in post-Soviet countries. It is anticipated that applications of the proposed software module will enable the transition to sustainable development in the Kazakh mining industry.
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Kolesnikov, Valery, Alexander Katsubin, Victor Martyanov e Alexander Dobrov. "Features of the Excavation and Loading Equipment of Various Types in the Development of Inclined and Steep Beds". E3S Web of Conferences 105 (2019): 01023. http://dx.doi.org/10.1051/e3sconf/201910501023.
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Open pit coal mining enterprises are constantly faced with the task of increasing the economic efficiency of mining, reducing coal losses and increasing profitability. One of the ways to increase the efficiency of open-pit mining is the improvement of the technology for developing coal-bearing zones of quarry fields in sloped and steeply complex (hard-structured) deposits. Currently, projects for promising deposits have been completed, and a number of existing sections are developing coal-bearing zones across their entire width in horizontal layers. Extraction and loading equipment for stripping and winning operations in this area is characterized by a wide variety: rope shovels (also called power or stripping shovels), backhoes and hydraulic shovels or their joint work. When using only rope shovels or only backhoes, they produce an excavation of both interbeds and coal seams. When they work together in the coal-bearing zone, the rope shovel makes a stripping of the interbeds, and the backhoe – an extraction of the coal seams. However, such technical solutions are not sufficiently substantiated. The fact is that rope shovels and backhoe shovels have their advantages and disadvantages in operation.
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Rada, Constantin, e Florin Faur. "The risk of landslide occurrence in the waste dump belonging to the Ruget quarry and measures to combat it". MATEC Web of Conferences 290 (2019): 11010. http://dx.doi.org/10.1051/matecconf/201929011010.
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The mining waste dump has emerged as a result of lignite extraction from Ruget quarry. The waste dump should have 6 steps with a total height of 90 m (as designed), but, at present, only 5 steps have been constructed (in different stages of execution) due to cessation of the activity. Since the stability analysis showed a high degree of instability for some steps there are needed specific redesigning works (slope angle reduction, terraces, levelling etc.) as well as hydrotechnical works (central and side collector drains and collector tubes at the base of the dump). At present, no properly designed works to eliminate the risk of landslide (not even consolidation) and no ecological rehabilitation projects are in progress. Thus, in this paper there are proposed and designed stabilization works (by reshaping, construction of rock support walls at the base of the dump etc.), as well as recultivation with specific plants, which aim at eliminating the geotechnical risks in the area and the reintegration of the dump in the surrounding landscape.
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Rysbekov, K. B., Dai Huayang, M. B. Nurpeisova, V. H. Lozynskyi, G. M. Kyrgyzbayeva, K. Kassymkanova e А. М. Abenov. "Modern monitoring tools – effective way to ensure safety in subsoil use". Engineering Journal of Satbayev University 144, n.º 3 (2022): 34–40. http://dx.doi.org/10.51301/ejsu.2022.i3.06.
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Work aim is to carry out geomonitoring of rock mass state, which provides for comprehensive accounting and analysis of all natural and man-made factors, as well as use of methods and control tools developed by authors.Work uses complex method, including: study of mining and geological conditions, structural features of rocks of deposits and conduct of mine surveying observations in mines based on innovative methods and means of geomonitoring developed by the authors. Research materials of geomechanical processes at the mines of Akzhal, Saryoba Sayak and others are presented during projects implementation of «Development of innovative methods for predicting and assessment of rock mass state to prevent technogenic emergencies» and «Comprehensive monitoring of slow deformation processes of the earth's surface during large-scale development of ore deposits of Central Kazakhstan», and also used in the educational process of Satbayev University. As a result of research: methodology for comprehensive assessment of rocks state has been developed, which makes it possible to consider features of geological structure of undermined strata and, thereby, improve quality of geomechanical support for mining operations; design of permanent forced centering point (FCP) for installation of high-precision instruments has been developed, which makes it possible to ensure speed and accuracy of centering, as well as to exclude use of tripods; scientifically substantiated possibility of predicting stress-strain state of rock mass in the studied deposits, i.e. it is possible to determine: tensile strength - σco; clutch - K; density - γ and strength of rocks - f according to the scale of M.M. Protodyakonov; composition of hardening solution from mining waste has been developed to increase stability of sections of ledges of quarry, which has high fluidity, adhesion to rocks and sufficient strength.
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Aripin, Wahyu Teri, Ernawati Ernawati e Igo Sumarli. "ANALISA RANTAI PASOK MATERIAL USAHA JASA KONSTRUKSI KABUPATEN TASIKMALAYA". Jurnal Tekno Insentif 14, n.º 1 (1 de abril de 2020): 17–27. http://dx.doi.org/10.36787/jti.v14i1.155.
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Abstrak - Pelaksanaan pekerjaan infrastruktur/jasa konstruksi di Kabupaten Tasikmalaya diketahui mengalami beberapa kendala, antara lain pada setiap tahun anggaran terdapat proyek yang mengalami keterlambatan penyelesaian sehingga harus dikenai denda keterlambatan. Dari hasil observasi keterlambatan penyelesaian beberapa proyek tersebut diakibatkan adanya hambatan pada rantai pasok, baik itu rantai pasok bahan baku, tenaga terampil dan perlengkapan. Hambatan ini disinyalir karena perencanaan supply chain yang kurang baik dari semua pihak yang terlibat dalam pengerjaan proyek tersebut. Tujuan dari kajian ini adalah untuk memberikan usulan terhadap pengelolaan rantai pasok usaha jasa konstruksi dalam rangka meningkatkan efisiensi dan efektivitas penyelenggaraan usaha jasa konstruksi di Kabupaten Tasikmalaya. Metode atau tahapan serta program kerja penyelesaian kegiatan Kajian Rantai Pasok Usaha Jasa Konstruksi di Kabupaten Tasikmalaya, akan diuraikan rencana rinci dimulai dari tahapan penyelesaian kegiatan yang akan menghubungkan beberapa variabel sistem rantai pasok usaha jasa konstruksi yang ada di Kabupaten Tasikmalaya. Penelitian ini hanya berfokus pada analisa rantai pasok materialnya saja. Data dikumpulkan melalui observasi, survei, dan wawancara dengan para stakeholders usaha jasa konstruksi di Kabupaten Tasikmalaya. Kemudian untuk validasi data dilakukan FGD sebelum akhirnya dilakukan pengolahan data. Hasil analisa menunjukkan bahwa bahan/material terutama jenis bahan tambang alam/quarry untuk infrastruktur di Kabupaten Tasikmalaya dengan mempertimbangkan permintaan secara keseluruhan diperkirakan akan mengalami defisit pasokan sekitar tahun 2028. Selain itu bentuk rantai pasok yang tidak ideal menjadi faktor terjadinya keterlambatan penyelesaian proyek pekerjaan konstruksi di Kabupaten Tasikmalaya. Sehingga dalam kajian ini dibuat rekomendasi rantai pasok yang ideal dari hasil kolaborasi rantai pasok ideal O’Brien untuk diterapkan pada usaha jasa konstruksi di Kabupaten Tasikmalaya.
Abstract - The implementation of infrastructure works / construction services in Tasikmalaya Regency is known to experience several constraints, including in every budget year there are projects that are late in completion so they must be subject to late fees. Based on the results of observations, the delay in the completion of some of the projects due to obstacles in the supply chain, both the supply chain of raw materials, skilled workers and equipment. This obstacle was allegedly due to poor supply chain planning from all parties involved in the work on the project. The purpose of this study is to provide a proposal for the management of the supply chain of construction service businesses in order to improve the efficiency and effectiveness of the implementation of its service in Tasikmalaya Regency. Methods or stages as well as work programs for completing Construction Service Business Supply Chain Study activities in Tasikmalaya Regency will be elaborated starting from the stage of completing activities that will connect several supply chain system construction service business variables in Tasikmalaya Regency. This research only focuses on analyzing the supply chain of the material. Data was collected through observations, surveys and interviews with stakeholders of the construction service business in Tasikmalaya Regency. Then the data validation is done by the FGD before data processing is finally performed. The results of the analysis show that the materials, especially the type of natural mining / quarry for infrastructure in Tasikmalaya Regency by considering the overall demand is expected to experience a supply deficit around 2028. Besides the non-ideal supply chain shape is a factor in the delays in the completion of construction work projects in Tasikmalaya Regency. So in this study an ideal supply chain recommendation was made from the results of the O'Brien's ideal supply chain collaboration to be applied to the construction service business in Tasikmalaya Regency.
Teses / dissertações sobre o assunto "QUARRY MINING PROJECTS"
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Marques, Cátia Sofia Gomes. "Cidades criativas - projectar em áreas abandonadas ou deprimidas para reestruturação social cultural e económica". Master's thesis, Faculdade de Arquitetura de Lisboa, 2012. http://hdl.handle.net/10400.5/5983.
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Tese de Mestrado em Arquitectura com Especialização em Planeamento Urbano e Territorial.As pedreiras são fenómenos singulares ilustrativos das relações entre o homem e os valores do território. São paisagens exclusivas, identitárias da cultura das regiões em que se inserem, tal como dos recursos endógenos do meio, e neste sentido afirmam-se como fenómenos singulares pelo que devem ser defendidas e preservadas. Estas paisagens pela sua própria natureza e dimensões, na ausência de tratamento ambiental e paisagístico, podem repercutir-se pejorativamente. A não sustentabilidade das actividades extractivas impõem um limite ao seu desenvolvimento. Pelo que, após as explorações, a recuperação da área afectada é um imperativo legislativo. Assegurando o equilíbrio ecológico e a qualidade paisagística do local. As mesmas características e especificidades das pedreiras que incitam ao prejuízo atribuem, por outro lado, um carácter excepcional a estas paisagens. As áreas extractivas após o término da sua função genérica podem representar a oportunidade de serem reconvertidas em novos valores. A reabilitação de uma pedreira pode perpetuar o propósito útil do espaço, valorizando as especificidade da paisagem e a sua competitividade. A sua reconversão em novos atractivos pode beneficiando a região e da população e, simultaneamente, assegurar o equilíbrio e qualidade do meio e da paisagem.
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Molino, Fernanda Brusa. "Mecanismo de Desenvolvimento Limpo e eficácia das medidas de compensação de reduções certificadas de emissões: análise de projetos aplicados à mineração". Pontifícia Universidade Católica de São Paulo, 2013. https://tede2.pucsp.br/handle/handle/6291.
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Previous issue date: 2013-11-05Industrialization, that was already seen as synonymous of progress and hope of a better future for most nations, reaches the XXIth century facing many detractors and being seen as a major threat because of its voracious consumption of raw material which exhausts seas, forests, soil, subsoil and releases harmful gases that contribute to the greenhouse effect, causing the reaction of sectors of society concerned with the legacy that will be let to future generations. Among most harming sectors, are mining and related industry, whose degrading and polluting activities demonstrates the need for quality control and environmental monitoring. This study seeks to contextualize the concern about global warming and the rise of international treaties on the subject for the defense of the environment, mentioning Kyoto Protocol, Intergovernmental Negotiating Committee for a Framework Convention on Climate Change (INC/FCCC), the conferences between the parties, and also the Brazilian legislation related to the issue of climate change mitigation. The study seeks to know about the flexibility mechanisms proposed by Kyoto Protocol, aiming to achieve emission reductions by developed countries signatories. The research analyzes the Clean Development Mechanism (CDM), the Certified Emission Reductions (CER) and the efficiency of these instruments as a form of environmental compensation, highlighting the various modalities, to finish with the presentation of the carbon market and CDM related projects that help in global warming mitigation undertaken by mining sector. Among the findings, it appears that compensation measures are able to meet the recommendations of the Kyoto Protocol and to assist in combating the adverse effects of mining to the environment
A industrialização, antes sinônimo de progresso e esperança de um futuro melhor para a maioria das nações, alcança o século XXI enfrentando muitos detratores e sendo vista como grande ameaça em razão da voracidade no consumo de matéria-prima que exaure os mares, as florestas, o solo, o subsolo e libera os nocivos gases que contribuem para o efeito estufa, provocando a reação de setores da sociedade preocupados com o legado que será herdado pelas gerações futuras. Entre os setores que mais poluem está a mineração e as atividades relacionadas, cuja ação degradadora para o meio ambiente demonstra a necessidade de controle de qualidade ambiental e monitoramento. Este estudo busca contextualizar a preocupação com o aquecimento global e o surgimento de tratados internacionais sobre o tema para a defesa do meio ambiente, fazendo menção ao Protocolo de Quioto, à Convenção- Quadro das Nações Unidas sobre Mudança do Clima e às Conferências entre as partes, e também as legislações brasileiras relacionadas à questão da mitigação das mudanças climáticas. Buscam-se conhecer os mecanismos de flexibilização propostos pelo Protocolo de Quioto, visando atingir às reduções de emissão pelos países desenvolvidos signatários. A pesquisa analisa os Mecanismos de Desenvolvimento Limpo (MDL), as Reduções Certificadas de Emissões e a eficiência desses instrumentos como forma de compensação ambiental, destacando-se as várias modalidades, para finalizar com a apresentação do mercado de carbono e projetos relacionados com MDL que auxiliam na mitigação do aquecimento global empreendidos pelo setor minerário. Entre os achados, verifica-se que as medidas de compensação são capazes de atender às propostas do Protocolo de Quioto e auxiliar no combate aos efeitos adversos da mineração ao meio ambiente
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FAISAL, JAMAL. "ASSESSING THE ENVIRONMENTAL AND SOCIAL IMPACTS OF QUARRY MINING PROJECTS IN MOGADISHU, SOMALIA". Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/20143.
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This research focuses on the assessment of the impact of quarry mining activities on the
environment and the nearby community in the Karan and Wadajir district of Mogadishu, Somalia.
The study focuses on the effects of quarrying activities on society and the environment, as well as
potential solutions to these problems. The research objectives include identifying the main factors
contributing to improper quarrying activities, investigating the effects of such activities on the
environment and its surrounding neighborhood.
The significance of this research lies in advancing knowledge about the effects of quarry
extraction on natural and social settings. By studying the perceptions of nearby neighbors and
corporate employees, the research aims to provide insights into how individuals in mining districts
perceive the social and ecological consequences associated with quarry mining operations. The
findings of this study can be used by planners, policymakers, and decision-makers to manage
abandoned quarries effectively and turn them into secure locations. The research also aims to
provide guidance on ecologically sustainable and friendly quarrying operations to fill the existing
scientific and knowledge gap. The study is geographically limited to the Mogadishu quarries in the
El-addo, Karan, and Wadajir districts. The research methodology involves a questionnaire surveys,
interviews, and observations. The data collected from quarry workers, local residents, and
environmental protection authorities are analyzed using descriptive statistics. The majority of
respondents fell within the 26-35 age range, and quarry owners/operators constituted the largest
occupation group. The level of awareness among quarry workers and operators about proper mining
practices was rated as high by 34.5% of the respondents. While 34.5% of respondents were aware
of negative environmental impacts caused by quarry mining activities, 65.5% reported being
unaware. Factors contributing to improper quarrying activities include limited knowledge about
sustainable mining practices, lack of regulations and enforcement, poverty and economic
desperation, corruption and illegal activities, and insufficient government oversight.
The research findings contribute to raising awareness about the potential environmental
effects of quarries and provide valuable information for mitigation and corrective actions. The
results also inform decision-making processes and facilitate the proper management and
rehabilitation of abandoned quarry sites. By filling the knowledge gap, the research supports the
development of ecologically sustainable quarrying operations.
Livros sobre o assunto "QUARRY MINING PROJECTS"
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Amosu, Cyril. Mining Feat: Seasonal Monitoring of the Economic Sustainability of Fanalou Quarry, Ikpeshi, Edo State, Waste Minimization in Segilola Gold Mine Project, Osun State, Solid Minerals Blueprint for Sustainable Local Prospects and Development. Independently Published, 2022.
Encontre o texto completo da fonteCapítulos de livros sobre o assunto "QUARRY MINING PROJECTS"
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Goodwin, Joshua A. "Aggregate mining on Mount Zion, Clayton, California". In Regional Geology of Mount Diablo, California: Its Tectonic Evolution on the North America Plate Boundary. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.1217(05).
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ABSTRACT Two construction aggregate companies, Cemex and Hanson Aggregates, operate respective crushed stone quarries on the east and west slopes of Mount Zion in Clayton, California. These sidehill quarries utilize a single highwall and mine Jurassic diabase of the Coast Range ophiolite that formed as a sheeted dike complex. Hydrothermal veins, some containing 20%–30% disseminated pyrite and chalcopyrite, cut the diabase. The east quarry, operated by Cemex, was started by the Harrison-Birdwell Company in 1947. The west quarry, operated by Hanson, was started by the Henry J. Kaiser Sand and Gravel Company in 1954. The Cemex quarry highwall is visible as you come into the city of Clayton on Marsh Creek Road, with a height of ~280 m (920 ft). The height of the highwall at the Hanson quarry is ~215 m (700 ft). Both operations remove weathered diabase overburden to expose fresh diabase, which is drilled, blasted, and hauled to the plant for processing. To ensure aggregate is suitable for construction, quality assurance testing is conducted in accordance with the specifications of various agencies. These quarries supply the surrounding area with aggregate for hospitals, schools, highways, dams, and other buildings. Noteworthy projects supplied by the Clayton quarries include the Concord BART Station, Interstate-680, Interstate-580, Calaveras Dam, Sherman Island Levee, Highway 4, Highway 24, and Bay Bridge epoxy asphalt. Before aggregate was mined, Mount Zion was the site of a copper rush from 1862 to 1864. Gold and silver were also reported in various assays from the Clayton district. Although prospecting created excitement around Clayton, no productive orebodies were ever discovered.
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Massaro, Alessandro, e Angelo Galiano. "Image Processing and Post-Data Mining Processing for Security in Industrial Applications". In Handbook of Research on Intelligent Data Processing and Information Security Systems, 117–46. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1290-6.ch006.
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The chapter analyzes scientific approaches suitable for industrial security involving environment health monitoring and safety production control. In particular, it discusses data mining algorithms able to add hidden information important for security improvement. In particular k-means and artificial intelligence algorithms are applied in different cases of study by discussing the procedures useful to set the model including image processing and post clustering processing facilities. The chapter is focused on the discussion of information provided by data mining results. The proposed model is matched with different architectures involving different industrial applications such as biometric classification and transport security, railway inspections, video surveillance image processing, and quarry risk evaluation. These architectures refer to specific industry projects. As advanced applications, a clustering analysis approach applied on thermal radiometric images and a dynamic contour extraction process suitable for oil spill monitoring are proposed.
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Stellin, A., W. T. Hennies, L. Soares, F. Fujimura, M. R. M. Stellin e V. H. Lauand. "Area recovery project of dimension stone quarry closure". In Mining Science and Technology, 663–70. CRC Press, 2004. http://dx.doi.org/10.1201/9780203022528-127.
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M, Stellin, Hennies, A, H. Lauand, Jr Stellin, W. T, L. Soares e F. Fujimura. "Area recovery project of dimension stone quarry closure". In Mining Science and Technology, 663–70. Taylor & Francis, 2004. http://dx.doi.org/10.1201/9780203022528.ch127.
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"7. The ancient quarry and mining district between the Eifel and the Rhine: aims and progress of the Vulkanpark Osteifel Project". In The Cultural Landscape and Heritage Paradox, 177–86. Amsterdam University Press, 2011. http://dx.doi.org/10.1515/9789048510962-012.
Texto completo da fonteTrabalhos de conferências sobre o assunto "QUARRY MINING PROJECTS"
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Wang, Wentao, Arushi Gupta e Nan Niu. "Mining Security Requirements from Common Vulnerabilities and Exposures for Agile Projects". In 2018 IEEE 1st International Workshop on Quality Requirements in Agile Projects (QuaRAP). IEEE, 2018. http://dx.doi.org/10.1109/quarap.2018.00007.
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Moni, Vlastimil, Lubomir Donat e David Hirman. "INCREASING OF THE SERVICE LIFE OF BUCKETS WITH CORNER EDGES OF BUCKED-WHEEL EXCAVATORS IN THE LOCATION OF THE CSA BROWN COAL SURFACE MINE". In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/1.1/s03.035.
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In accordance with the latest trends, considerable emphasis is put on all mining companies in the Czech Republic not only on reducing the environmental impact of brown coal mining, but also on overall efficiency, the balance of which can be improved by increasing of the operational reliability of individual components of technological units and reducing operating costs. And it is the latter sphere, in that Vrsanska uhelna a.s. does considerable initiative. In cooperation with the firm RENOMAG s.r.o. and the Research Institute for Brown Coal a.s. carries out the development and laboratory and in situ operational tests of new types of buckets with corner edges and other material tests of disconnecting organs used in the extraction of brown coal by the surface method. The article briefly acquaints the reader with the progress of work on the development of new types of buckets with corner blades of a bucked-wheel excavator series KU 800 used for mining of the overburden at the site of the Czechoslovak Army mine (CSA) and its content follows a series of articles describing activities in the field for the monitored period within the solved project. Attention is paid mainly to the results of operational testing of new prototypes of blades on a real machine in the conditions of overburden mining at the Vrsany mine, based on other designs and modifications of replaceable corner blade were created, which were tested in real operation of CSA quarry. The new replaceable corner blade with an innovated shape and unique material composition was then used on the KU 800 excavator in order to verify the functionality of the edge geometry in specific operating conditions and to find out the appropriate edge geometry and abrasion protection for the given mining conditions. At the end of the article, the results and evaluation of the implemented long-term operational tests are described together with the final summary of specific benefits of deployed prototypes of buckets with corner edges.
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He, Changdi, e Brijes Mishra. "Characterization of Fracture Propagation in Granite Under Uniaxial Compression Test Through Digital Image Processing and Discrete Element Method". In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0529.
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ABSTRACT This study utilized digital image processing (DIP) and discrete element method (DEM) to explore the correlation between mineralogy and fracture propagation in granite. The study concludes that an increase in the content of quartz and feldspar leads to a gradual increase in the uniaxial compressive strength (UCS) value of granite. However, the UCS value of granite undergoes a significant decline with increasing mica content. Additionally, the presence of quartz intensifies the brittleness of granite, while feldspar enhances the ductility of granite. In the isotropic model, fractures tend to initiate from stress concentration points and propagate during the UCS test, causing further stress concentration due to the creation of high-stress zones by the crack tip. In the anisotropic model, fractures usually occur in areas where quartz and feldspar are more concentrated because of a higher likelihood of stress concentration in those regions. However, mica agglomerations are not susceptible to stress concentrations due to their low strength and high toughness, which serve as a buffer. INTRODUCTION Granite is commonly utilized as a host rock for various underground engineering projects such as radioactive waste disposal, deep mining, and enhanced geothermal systems (EGS)(Zhu et al., 2021; Kumari et al., 2017). Nonetheless, the presence of fractures in granite can have varying effects on these projects. In the case of radioactive waste disposal, fractures can compromise the integrity of the repository by providing pathways for radioactive material leakage into the surrounding environment (Jia et al., 2022; Zhao et al., 2022a). Moreover, in deep mining, fractures can pose a significant hazard to miners as they can destabilize the rock mass, leading to rockfalls and collapses that may endanger their lives (Zhao et al., 2022b). Conversely, fractures in granite play a crucial role in EGS, as they facilitate fluid flow and heat transfer. The distribution and connectivity of fractures can impact the efficiency of EGS by affecting the flow of fluid through the reservoir (Zhong et al., 2022).
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Brašnjić, Benjamin, e Dean Osmanović. "INFLUENCE OF THE CHEMICAL COMPOSITION OF LIMESTONE ON THE DEVELOPMENT OF MINING WORKS IN QUARRY". In GEO-EXPO 2021. DRUŠTVO ZA GEOTEHNIKU U BOSNI I HERCEGOVINI, 2021. http://dx.doi.org/10.35123/geo-expo_2021_6.
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There are only a few limestone mines in Bosnia and Herzegovina that provide the mineral raw material for industrial production. As a result, the experience in planning and designing such quarries is lesser than in designing the quarries for construction. Limestone from "Vijenac" deposit is an industrial mineral raw material, which is used for the production of soda (light, heavy and bicarbonate), cement, nitrogen fertilizer named "KAN", and is also used in construction and road construction. The use of limestone as a mineral raw material in industrial production requires more attention to the chemical composition of limestone than to the physical-mechanical characteristics. The paper presents a solution to this problem by creating a block of models of exploitation reserves of limestone, which enables foresight of the chemical composition of limestone, both in each floor partially and during the period of exploitation. The block model was created on the basis of the updated state of works, the projected contour of limestone surface mine and the exploration works' database. The block model uses the following: CaCO3, CaO, SiO2, Al2O3, Fe2O3, bulk density, category of reserves and the purpose of the mineral raw material, i.e. for industry or construction. The block model analysis has determined that the northern part of the mine, from the floor E-612.5 to E-525 meters a.s.l., does not meet industrial requirements in terms of chemical composition of limestone. Therefore, limestone from this part of the surface mine will be used for construction purposes. These quantities of limestone are about 2.6x106 m3. Limestone from the southern part of the surface mine meets the industry requirements. Its quantities are about 8.47x106 m3.
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Chignoli, L., G. E. Cossali e M. Marengo. "Design of a Polymeric Mini-Channelled System for the Cooling of a High-Energy Particle Detector at FERMILAB". In ASME 3rd International Conference on Microchannels and Minichannels. ASMEDC, 2005. http://dx.doi.org/10.1115/icmm2005-75241.
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BTeV is a high-energy physics experiment, which is designed to proof several aspects of the so-called Standard Model. Precise measurements will reveal if the Standard Model contains breakdowns and therefore they will hint new matters for a more fundamental theory. One of BTeV’s main goals is to precisely measure CP violation in the beauty quark system. CP violation was first observed in strange quarks in 1963 and recently in beauty quarks at BaBar and Belle. CP violation causes particles and antiparticles to behave differently. The BTeV experiment was approved by FERMILAB and was currently being developed. In fact a very recent decision from the Department of Energy (February 2005) cancelled the project due to budget restrictions. A prototype of an innovative detector, called μ-strip detector, is under construction in a team leaded by an Italian group at INFN. The detector is based on copper strips deposited onto 300μm thick high resistivity bulk silicon. A hybrid electronic linked at the two terminals of the strips is positioned on the silicon layer. The system is inserted in a carbon fiber structure and then finally located around the particle beam. Even if the details of the electronic power dissipation and the chip geometry are not yet completely defined, the major constraints of the experiment (radiation hard structure, no mechanical vibration, high signal noise ratio with extremely low electrical charges, low atomic number of the components) have led the μ-strip team to make an effort in direction of a heat-sink based on a PEEK mini-tube system.
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Francini, Robert B., e William Nik Baltz. "Blasting and Construction Vibrations Near Existing Pipelines: What Are Appropriate Levels?" In 2008 7th International Pipeline Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ipc2008-64325.
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Construction and industrial processes such as mining and quarry blasting or pile driving near a pipeline create vibrations that will result in stress on the pipeline. This stress is added to the normal operating stress on the line. The obvious way to determine these stresses is by exposing the pipeline, installing strain gauges, reburying the line and measures its response to the event. This is very costly and not a practical approach in most cases. A common method that is used for monitoring these activities is to measure the vibration of the ground above the pipeline. The question then becomes, how do these vibrations relate to the stress on the pipe? The answer to this question is very important both to the pipeline and the construction/process operators as it will determine what the allowable vibration levels are. We will present the results of a recent project where 4 pipelines located within a coal field production area were instrumented with strain gauges and the stress on the lines measured along with the particle velocity in the soil above the lines during a large blast. This data will be compared with blasting data generated by the Bureau of Mines and Esparza. We will then look at methods for estimating the stress to see how they compare with the data. Finally we will present guidelines for determining acceptable vibration levels over a pipeline based on these results and an integrity analysis of the pipeline.