Log in

Relevant bibliographies by topics / Hard coal mining / Journal articles

To see the other types of publications on this topic, follow the link: Hard coal mining.

Journal articles on the topic 'Hard coal mining'

Author: Grafiati

Published: 24 April 2022

Last updated: 30 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Hard coal mining.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Qiang Zhang, Cong Wang,. "A Data Mining Method for Constitutive Model of Hard Brittle Coal." Journal of Electrical Systems 20, no. 2 (2024): 971–84. http://dx.doi.org/10.52783/jes.1262.

Full text

Abstract:

Data mining is an effective way to solve various types of complex nonlinear problems. And the anisotropy of the mechanical characteristics of coal is a typical nonlinear problem. Hard coal seam are usually characterized by brittleness, which makes them difficult to be crushed efficiently. It is important to improve the efficiency of hard coal crushing by the brittleness characterization method of hard coal is clarified. So the constitutive model and damage mechanism of hard brittle coal was studied in this paper. Damage model of hard brittle coal based on Weibull distribution was established.

APA, Harvard, Vancouver, ISO, and other styles

2

Bukowska, Mirosława, Urszula Sanetra, and Mariusz Wadas. "Zonation of deposits of hard coals of different porosity in the Upper Silesian Coal Basin." Gospodarka Surowcami Mineralnymi 32, no. 1 (2016): 5–24. http://dx.doi.org/10.1515/gospo-2016-0009.

Full text

Abstract:

Abstract The article presents the results of tests of porosity of the Upper-Silesian Coal Basin (USCB) hard coals. The porosity was determined for various lithotypes of hard coal, collected in different areas of the Upper-Silesian Coal Basin. Samples of hard coal were collected in 60 seams of 16 coal mines, from the depth of approximately between 350 and 1200 m. There are also presented differences in values of open porosity of coal depending on the depth of occurrence, as well as chronostratigraphic and tectonic correlation of a seam. Uniaxial compression strength of the tested coals falls in

APA, Harvard, Vancouver, ISO, and other styles

3

Liu, Xiaoyu, Manchao He, Jiong Wang, and Zimin Ma. "Research on Non-Pillar Coal Mining for Thick and Hard Conglomerate Roof." Energies 14, no. 2 (2021): 299. http://dx.doi.org/10.3390/en14020299.

Full text

Abstract:

This article introduces a new non-pillar coal mining technology (i.e., Gob-side Entry Retaining by Roof Cutting (GERRC)) under the condition of thick and hard roofs. First, we theoretically analyzed the solution to the large suspension span of the thick and hard roof in coal mining. Three-Zone pre-split blasting design in non-pillar coal mining for thick and hard roofs was proposed, based on the principles of rock mechanics. After field experiments, the technology was successfully applied to the non-pillar coal mining of a huge thick conglomerate roof. This research supplements the non-pillar

APA, Harvard, Vancouver, ISO, and other styles

4

Liu, Xiaoyu, Manchao He, Jiong Wang, and Zimin Ma. "Research on Non-Pillar Coal Mining for Thick and Hard Conglomerate Roof." Energies 14, no. 2 (2021): 299. http://dx.doi.org/10.3390/en14020299.

Full text

Abstract:

This article introduces a new non-pillar coal mining technology (i.e., Gob-side Entry Retaining by Roof Cutting (GERRC)) under the condition of thick and hard roofs. First, we theoretically analyzed the solution to the large suspension span of the thick and hard roof in coal mining. Three-Zone pre-split blasting design in non-pillar coal mining for thick and hard roofs was proposed, based on the principles of rock mechanics. After field experiments, the technology was successfully applied to the non-pillar coal mining of a huge thick conglomerate roof. This research supplements the non-pillar

APA, Harvard, Vancouver, ISO, and other styles

5

Jonek-Kowalska, Izabela. "State aid and competitiveness of the hard coal mining industry in the European Union." Equilibrium 10, no. 1 (2015): 69. http://dx.doi.org/10.12775/equil.2015.004.

Full text

Abstract:

The hard coal mining industry in the European Union (EU) is in decline, mostly due to a lack of price competitiveness. It is maintained, to a great extent, by state aid; the key objective of the industry’s existence is to provide energy security and guarantee employment in the mining regions. In Poland, the hard coal mining industry is currently undergoing a serious crisis that threatens the two largest mining enterprises with bankruptcy. In addition, due to the European Union’s restrictions concerning the circumstances of granting state aid, these enterprises cannot count on the financial sup

APA, Harvard, Vancouver, ISO, and other styles

6

Yu, Bin, Jun Zhao, and Hong Chun Xia. "Study on Technology of Fully-Mechanized Sub-Level Caving Mining Technology in the Datong Permo Carboniferous Coal Seam." Advanced Materials Research 616-618 (December 2012): 565–68. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.565.

Full text

Abstract:

This thesis briefly introduced roof control technology in fully-mechanized sublevel caving mining with hard roof and hard coal seam, Mining technology , gas prevention and comprehensive prevention and control technology in spontaneous combustion of coal, which in longwall top-coal caving face with hydraulic support in thickness seam in the Datong permo carboniferous coal seam . New development directions of fully-mechanized sublevel caving mining technology in the Datong mining area in the next few years.

APA, Harvard, Vancouver, ISO, and other styles

7

Sygut, Edyta. "Skutki procesu dekarbonizacji dla gmin województwa śląskiego w zakresie dochodów z opłaty eksploatacyjnej." Optimum. Economic Studies, no. 4(118) (2024): 180–93. https://doi.org/10.15290/oes.2024.04.118.11.

Full text

Abstract:

Purpose – Withdrawal from hard coal as an energy source, and the resulting abandonment of its extraction, has numerous consequences, including fiscal ones. The purpose of the article is to assess the effects of decarbonisation process on the financial management of municipalities of the Silesian Voivodeship in terms of mining fee in the context of fiscal stability. Research method – The research covers the period of 2012–2022. The first stage consists in the assessment of the fiscal efficiency of mining fee in the budgets of municipalities of specific voivodeships in Poland, separately in term

APA, Harvard, Vancouver, ISO, and other styles

8

Huo, Wenqi, Huaizhan Li, Guangli Guo, Yuezong Wang, and Yafei Yuan. "Surface Subsidence Prediction Method for Backfill Mining in Shallow Coal Seams with Hard Roofs for Building Protection." Sustainability 15, no. 22 (2023): 15791. http://dx.doi.org/10.3390/su152215791.

Full text

Abstract:

The mining of shallow coal seams with hard roofs poses a threat to surface structures. In order to ensure the protection of these buildings, backfill mining is increasingly used in these types of coal seams. However, due to the lack of appropriate surface subsidence prediction methods, there are concerns about whether backfill mining can meet the requirements of building protection. In this study, through numerical simulation and physical experiments, the movement characteristics of the strata and surface were studied in the backfill mining of a shallow coal seam with a hard roof. Our results

APA, Harvard, Vancouver, ISO, and other styles

9

Dubiński, Józef, and Marian Turek. "Chances and Threats of Hard Coal Mining Development in Poland – The Results of Experts Research/Szanse I Zagrożenia Dla Rozwoju Górnictwa Węgla Kamiennego W Polsce – Wyniki Badań Eksperckich." Archives of Mining Sciences 59, no. 2 (2014): 395–411. http://dx.doi.org/10.2478/amsc-2014-0028.

Full text

Abstract:

Abstract The actual situation of hard coal mining in Poland has been presented. In particular, these factors, which have impact on the competiveness of mining sector were highlighted and need of its improving has been stressed. Outlining present situation of hard coal mining an attention was paid to its specific threats. The primary analytical material is based on the results of questionnaire conducted among 92 specialists and experts from the mining sector. The questions were related to chances and threats for development of hard coal mining in Poland. The factors determining them were groupe

APA, Harvard, Vancouver, ISO, and other styles

10

Zhang, Wei, Jiawei Guo, Kaidi Xie, et al. "Comprehensive technical support for safe mining in ultra-close coal seams: A case study." Energy Exploration & Exploitation 39, no. 4 (2021): 1195–214. http://dx.doi.org/10.1177/01445987211009390.

Full text

Abstract:

In order to mine the coal seam under super-thick hard roof, improve the utilization rate of resources and prolong the remaining service life of the mine, a case study of the Gaozhuang Coal Mine in the Zaozhuang Mining Area has been performed in this paper. Based on the specific mining geological conditions of ultra-close coal seams (#3up and #3low coal seams), their joint systematic analysis has been performed, with the focus made in the following three aspects: (i) prevention of rock burst under super-thick hard roof, (ii) deformation control of surrounding rock of roadways in the lower coal

APA, Harvard, Vancouver, ISO, and other styles

11

Cheng, Qingying, Bingxiang Huang, Luying Shao, et al. "Combination of Pre-Pulse and Constant Pumping Rate Hydraulic Fracturing for Weakening Hard Coal and Rock Mass." Energies 13, no. 21 (2020): 5534. http://dx.doi.org/10.3390/en13215534.

Full text

Abstract:

The weakening of hard coal–rock mass is the core common problem that is involved in the top coal weakening in hard and thick coal seams, the hard roof control during the initial mining stage in the longwall mining face, and the hanging roof control in the gob of non-coal mine. Based on the characteristics of pulse hydraulic fracturing and constant pumping rate hydraulic fracturing, a weakening method for hard coal–rock mass by combining pre-pulse and constant pumping rate hydraulic fracturing is proposed. A complete set of equipment for the combined pulse and constant pumping rate hydraulic fr

APA, Harvard, Vancouver, ISO, and other styles

12

Shen, Yu San, and Li Jun Zeng. "The Study of Combined Mining Technology at Thin Coal Seam with Hard Limestone Floor." Advanced Materials Research 594-597 (November 2012): 2640–43. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.2640.

Full text

Abstract:

The mining of thin coal seam with hard limestone floor require that the mating of full mechanized mining equipments must be scientific and rational.It is difficult to advancing when adopting inclined mining or the face meet geological structure. This paper analyzed and solved the main technical matters in the mining of thin coal seam with hard floor,such as fast marching method of inclined mining face ,process parameters optimization of mining face and meeting geological structure etc.

APA, Harvard, Vancouver, ISO, and other styles

13

Feng, Junwen, Wenmiao Wang, Zhen Wang, et al. "Study on the Mechanism and Control of Strong Rock Pressure in Thick Coal Seam Mining under the Goaf of Very Close Multiple Coal Seams." Processes 11, no. 5 (2023): 1320. http://dx.doi.org/10.3390/pr11051320.

Full text

Abstract:

With the increasing proportion of close-distance coal seam mining in China, the problem of strong mining pressure during the mining of close-distance coal seams is becoming more and more severe. This article focuses on the complex stress environment and severe mining pressure encountered in the mining of thick coal seams under the multi-coal-seam goaf of Zhunnan Coal Mine. By using research methods, such as similar material simulation, theoretical analysis, and numerical simulation, it studies in depth the instability characteristics of the overlying rock structure of the W1701 working face, t

APA, Harvard, Vancouver, ISO, and other styles

14

Gong, Peng, Yongheng Chen, Zhanguo Ma, and Shixing Cheng. "Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting." Advances in Civil Engineering 2020 (October 26, 2020): 1–12. http://dx.doi.org/10.1155/2020/8842818.

Full text

Abstract:

For the problem that the hard roof causes wider end-mining coal pillar, and the roadway is greatly affected by mining, this paper took Shanxi Luning Coal Mine as the engineering background; based on the stress distribution characteristics of the coal pillar, the calculation method of the limit end-mining coal pillar size was given; considering the formation conditions and transmission forms of the advanced abutment stress, a method combining presplitting and deep hole blasting was proposed to weaken the advanced abutment stress. The numerical simulation was used to analyze the stress distribut

APA, Harvard, Vancouver, ISO, and other styles

15

Starczewska, Magdalena, Anna Sowiżdżał, Kajetan d’Obyrn, and Damian Cień. "Mine Water as a Source of Energy—Case Study from Poland." Energies 17, no. 19 (2024): 4808. http://dx.doi.org/10.3390/en17194808.

Full text

Abstract:

The energy sector in Poland is primarily based on fossil fuels, mainly coal. Hard coal mining is one of the most important industries in Poland. Hard coal deposits in Poland are found in three basins, but mining is currently carried out in the Upper Silesian Coal Basin (USCB) and the Lublin Coal Basin (LCB). The Upper Silesian Coal Basin is Poland’s central hard coal basin, with the most significant coal production extending across Poland and the Czech Republic. Approximately 80% of proven hard coal resources in Poland are found in the Upper Silesian Coal Basin (USCB). There is a tremendous am

APA, Harvard, Vancouver, ISO, and other styles

16

Zheng, Kaige, Yu Liu, Tong Zhang, and Jingzhong Zhu. "Mining-Induced Stress Control by Advanced Hydraulic Fracking under a Thick Hard Roof for Top Coal Caving Method: A Case Study in the Shendong Mining Area, China." Minerals 11, no. 12 (2021): 1405. http://dx.doi.org/10.3390/min11121405.

Full text

Abstract:

Fully mechanized top-coal caving mining with high mining height, hard roofs and strong mining pressure are popular in the Shendong mining area, China. The occurrence of dynamic disasters, such as rock burst, coal and gas outburst, mine earthquakes and goaf hurricanes during the coal exploitation process under hard roof conditions, pose a threat to the safe production of mines. In this study, the characteristics of overburden fracture in fully mechanized top-coal caving with a hard roof and high mining height are studied, and the technology of advanced weakening by hard roof staged fracturing w

APA, Harvard, Vancouver, ISO, and other styles

17

Dou, Litong, Ke Yang, Wenjie Liu, Xiaolou Chi, and Zhijie Wen. "Mining-Induced Stress-Fissure Field Evolution and the Disaster-Causing Mechanism in the High Gas Working Face of the Deep Hard Strata." Geofluids 2020 (September 25, 2020): 1–14. http://dx.doi.org/10.1155/2020/8849666.

Full text

Abstract:

The compound dynamic disaster of coal and gas outbursts and rockburst is a typical hazard jeopardizing the mining of the high gas content coal seam under a hard roof condition. In this study, the hard roof’s mechanism inducing this hazard is analyzed. Physical analog modeling experiments and in situ monitoring of mining-induced stress were performed during coal seam mining under a hard roof condition. The pattern of hard roof breakage effect on the stress-fissure field evolution was revealed. The elastic energy was released and propagated on both sides immediately after the hard roof breaking,

APA, Harvard, Vancouver, ISO, and other styles

18

Liu, Xiaoyu, Guodong Mei, Xuyang Xie, Sha Wang, and Manchao He. "Research and Application of Integrated Presplitting Blasting in Nonpillar Mining Technology." Shock and Vibration 2022 (April 18, 2022): 1–15. http://dx.doi.org/10.1155/2022/6637580.

Full text

Abstract:

This article introduces a technology of integrated presplitting blasting, which can be applied to a new nonpillar coal mining method (i.e., Gob-side Entry Retaining by Roof Cutting (GERRC)) under the condition of thick and hard roofs. First, the new nonpillar coal mining method emerging in China is explained. Then, the concept of integrated presplitting blasting was put forward, and the mechanism of the technology was explained by the method of numerical simulation. Through a mining case with a thick hard limestone roof, the relevant design of nonpillar mining and the design parameters of inte

APA, Harvard, Vancouver, ISO, and other styles

19

Bogusz, Anna, and Mirosława Bukowska. "Specific Energy of Hard Coal Under Load." Studia Geotechnica et Mechanica 37, no. 1 (2015): 9–16. http://dx.doi.org/10.1515/sgem-2015-0002.

Full text

Abstract:

Abstract The article presents results of experimental tests of energy parameters of hard coals under loading, collected from research sites located within five main geologic structures of Upper Silesian Coal Basin (GZW) - Main Trough, Main Anticline, Bytom Trough, Rybnik Trough and Chwałowice Trough. Coals from12 mines were analysed, starting with seams of group 200, through groups 400, 500, 600 and, finally, seams of group 700. Coal of each of the groups of seams underwent uniaxial compression stress of the energy parameters, in a servo-controlled testing machine MTS-810NEW, for the full rang

APA, Harvard, Vancouver, ISO, and other styles

20

Dreger, Marcin. "Changes in the methane emissions and hard coal output in the Brzeszcze mine (the Upper Silesian Coal Basin, Poland)." Geology, Geophysics and Environment 46, no. 2 (2020): 159. http://dx.doi.org/10.7494/geol.2020.46.2.159.

Full text

Abstract:

The paper presents the variability of methane emissions in mining excavations in the Brzeszcze mine (Poland) against the background of hard coal output, geological and mining factors. The geological structure of the Upper Silesian Coal Basin (USCB) is very diverse. The Brzeszcze coal deposit is located close to the large and permeable Jawiszowice fault which increases the methane hazard during mining activities performed close to this fault. The overall decrease in hard coal output (1988–2018) has coincided with a rapid increase in methane emissions (1997–2018). Throughout the study period, ha

APA, Harvard, Vancouver, ISO, and other styles

21

Biały, Witold. "Equipment/machinery failure rate in hard coal mines." New Trends in Production Engineering 2, no. 1 (2019): 353–63. http://dx.doi.org/10.2478/ntpe-2019-0038.

Full text

Abstract:

Abstract The main task of the maintenance services in hard coal mines is to ensure continuous operation of the equipment (machines). The measurable effect of these actions should be the reduction of maintenance costs of equipment (machinery) and thus the reduction of production costs – coal mining. The paper presents an issue of failure rate of technical measures applied in the mining process. In order to ensure greater efficiency and productivity, it is necessary to find the causes of the most frequent failures in this process and effectively counteract them. As a result of these activities,

APA, Harvard, Vancouver, ISO, and other styles

22

Tutak, Magdalena. "Analysis of the similarity of hard coal mines in terms of the number of dangerous incidents caused by the activation of natural hazards." Multidisciplinary Aspects of Production Engineering 2, no. 1 (2019): 91–100. http://dx.doi.org/10.2478/mape-2019-0009.

Full text

Abstract:

Abstract Hard coal mines and mining enterprises involved in hard coal exploitation in the area of the Upper Silesian Coal Basin (Górnośląskie Zagłębie Węglowe) are characterised by the presence of natural hazards typical of this type of exploitation. These hazards include the risks related to methane, coal dust explosion, endogenous fires, as well as rock burst and caving of roof rocks. The article presents the results of a taxonomic analysis aimed at determining the similarity of hard coal mines and mining enterprises in Poland in terms of the dangerous incidents caused by the risks related t

APA, Harvard, Vancouver, ISO, and other styles

23

Wang, Shuli, Guangli Zhu, Kaizhi Zhang, and Lei Yang. "Study on Characteristics of Mining Earthquake in Multicoal Seam Mining under Thick and Hard Strata in High Position." Shock and Vibration 2021 (March 3, 2021): 1–17. http://dx.doi.org/10.1155/2021/6675089.

Full text

Abstract:

Rock burst has become one of the most serious world’s problems in coal resources mining, and fracture and movement of thick and hard strata in high position is the main reason to induce strong mining earthquake and rock burst. Multicoal seam mining of 10302 working face in Baodian coal mine is selected as an engineering background, which has thick and hard strata in high position. Using SOS microseismic monitoring system to collect microseismic events and date during multicoal seam mining, characteristic and difference of microseismic in multicoal seam mining under thick and hard rock in high

APA, Harvard, Vancouver, ISO, and other styles

24

Tomczok, Marta. "Węglopolis – metropolitalne związki miast i „pod-powierzchni”." Wielogłos, no. 1 (55) (2023): 111–29. http://dx.doi.org/10.4467/2084395xwi.23.006.17994.

Full text

Abstract:

Coalpolis – Metropolitan Relation of Cities and “Under-Grounds” The article proposes the use of a new concept of coal city, which allows describing regions of hard coal mining and post-mining regions by taking into account both their geology as well as their mining and economic culture. Węglopolis (Coal City) is a perspective on literature and art, particularly useful in attempts to assess the past of coal regions and design their future. The author shows the correlation of coalpolises both with the available naming tradition (Górnośląsko-Zagłębiowska Metropolia, polis, megalopolis), as well a

APA, Harvard, Vancouver, ISO, and other styles

25

Bukowska, Mirosława, Piotr Kasza, Rafał Moska, and Janusz Jureczka. "The Young’s Modulus and Poisson’s Ratio of Hard Coals in Laboratory Tests." Energies 15, no. 7 (2022): 2477. http://dx.doi.org/10.3390/en15072477.

Full text

Abstract:

The Young’s modulus and Poisson’s ratio, parameters reflecting the elastic response of a rock to stress, are the key parameters used in many engineering activities, such as hard coal mining and natural gas extraction. The objective of this paper was to present the results of complex laboratory measurements of the static and dynamic Young’s modulus and Poisson’s ratio for Upper Carboniferous hard coals from the Upper Silesian Coal Basin. The coals differed in geologic age (Mudstone Series—younger coals; Upper Silesian Sandstone Series—older coals) and petrographic structure (vitrain, clarain, a

APA, Harvard, Vancouver, ISO, and other styles

26

Zhu, Wei, and Yong Hai Teng. "Characteristic of Development of the Fractured Zone in Mining under Medium Hard Overburden Using Fully-Mechanized Top-Coal Caving Method." Applied Mechanics and Materials 226-228 (November 2012): 1312–17. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.1312.

Full text

Abstract:

For the prediction of the height of the fractured zone developed in mining with fully-mechanized top-coal caving system, the traditional calculation method, if used, generally yield a value with a comparatively large error. Based on mining condition of 6206 face at Wangzhuang Coal Mine in Luan mining area, a comprehensive study is made in the paper of the characteristics of the development of the fractured zone in the medium hard overlying strata under such full-seam mining conditions by taking various means, including field measurement and numerical and physical simulation. Through comparison

APA, Harvard, Vancouver, ISO, and other styles

27

Đulović, Izudin, Rejhana Dervišević, and Dževad Forčaković. "GEOLOGICAL CHARACTERISTICS OF THE KOTEZI MINING DISTRICT IN THE BUGOJNO COAL BASIN." Glasnik Rudarsko-geološko-građevinskog fakulteta 10, no. 10 (2022): 19–30. http://dx.doi.org/10.51558/2303-5161.2022.10.10.19.

Full text

Abstract:

This paper presents geological characteristic of the deposit Kotezi of the Bugojno coal basin. Regional geological researches were conducted from 1983 to 1987, and detailed from 2014 to the end of 2018. After field research and laboratory tests, the analysis and interpretation of the obtained results was carried out. Based on the determined borders of surface distribution and the research results of the coal deposit Kotezi, proved are four coal layers: II bottom, I bottom, main and roof. Coal of the deposit Kotezi belong to the younger coals, soft to medium hard, no luster (matt), brown to bla

APA, Harvard, Vancouver, ISO, and other styles

28

Rybak, Aurelia, and Ewelina Włodarczyk. "ANALYSIS OF WORK EFFICIENCY IN HARD COAL MINING IN POLAND." CBU International Conference Proceedings 6 (September 26, 2018): 417–23. http://dx.doi.org/10.12955/cbup.v6.1192.

Full text

Abstract:

Motivation: This article presents the analysis of work efficiency in hard coal mining in Poland. Labour costs in Polish mining enterprises account for over 40% of the total production cost. For this reason, the labour productivity of employees has a key impact on the final operating profit.Problem statement: In the case of Polish coal companies, the efficiency is the index value of which particular restructuration programs have attempted to increase for years. However, because of the effect of overstaffing and a decrease in hard coal exploitation, the task was impossible.Approach and results:

APA, Harvard, Vancouver, ISO, and other styles

29

Zang, Chuan Wei, Xuean Zhuang, and Chuan Le Ma. "Research of Large-Area Hard Roof Caving Prevention and Control System in Shortwall Mining Face." Advanced Materials Research 734-737 (August 2013): 802–8. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.802.

Full text

Abstract:

In the mining process, if the roof is very hard, it will hang in a large area in the gob. The hanging roof may cave suddenly, which will crash the mining face and generate hurricanes so as to cause casualties and equipment damage. The hard roof control technology has mainly been used in the longwall mining face in coal mines for a long time, and made little use in shortwall mining face. The factors of roof caving is analyzed in shortwall mining area, which mainly consists of the coal pillar size and layout, the length of coal face, roof thickness and strength, the overburden load, the supporti

APA, Harvard, Vancouver, ISO, and other styles

30

Maksimović, Svetomir, and Marko Babović. "From the history of Serbian mining hard coal mine Dobra Sreća 1884 - 1970." Rudarski glasnik 121, no. 1-2 (2024): 85–95. https://doi.org/10.5937/rg2402085m.

Full text

Abstract:

This paper was created as a result of the need to point out the difficulties faced by the coal economy of Serbia, starting from the period of its creation in 1835. Until the moment when many mines with Kama coal exploitation were closed due to the low price of oil and gas, difficult conditions work and insufficient research. When writing this paper, the existing literature was mostly used: J. Grgašević, Mining in Serbia, V. Simić, Development of coal mines and coal industry in Serbia, P. Jovanović, Mining on the soil of Serbia II/1 I Geological conditions of the terrain between "Podvis" and "G

APA, Harvard, Vancouver, ISO, and other styles

31

Czaplicka-Kolarz, Krystyna, Dorota Burchart-Korol, Marian Turek, and Wojciech Borkowski. "Model Of Eco-Efficiency Assessment Of Mining Production Processes." Archives of Mining Sciences 60, no. 2 (2015): 477–86. http://dx.doi.org/10.1515/amsc-2015-0031.

Full text

Abstract:

Abstract The paper presents an author’s method of eco-efficiency assessment of mining production processes in hard coal mines, which enables integrating results of evaluating both environmental and economic aspects. The proposed method uses life cycle approach to assess environmental efficiency and the result of operating activities to assess economic efficiency. The comprehensive method of assessing mining production processes was proposed as the Key Performance Indicator (KPI) in hard coal mines in Poland to be used to support decision making in mining companies.

APA, Harvard, Vancouver, ISO, and other styles

32

Qin, Tao, Yong Li Liu, Chang Ji Dong, and Ping Wang. "Numerical Simulation and Analysis of Rock Burst Induced by Roof Movement." Applied Mechanics and Materials 522-524 (February 2014): 1394–98. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.1394.

Full text

Abstract:

For composite thick seams have been incidents burst power disasters, and seriously affect the safety of the mine production.Based on the engineering background in coal mine, through the same mining conditions, stope mining process simulation which happens in single hard coal, soft coal and single composite thick Coal Seam of Island face were studied through comparative analysis by FLAC3D numerical simulation technology. Tendency and trend of the pressure distribution results obtain through the comparative analysis . The research results has been applied in the actual coal mining.

APA, Harvard, Vancouver, ISO, and other styles

33

Rybak, Aurelia, and Anna Manowska. "Sales Forecasting and Coal Mining Planning in the Context of Hard Coal Production Strategies." Multidisciplinary Aspects of Production Engineering 1, no. 1 (2018): 483–89. http://dx.doi.org/10.2478/mape-2018-0061.

Full text

Abstract:

Abstract Polish energy security is based mainly on a coal. Such dependency will be still maintained for several years. It is therefore necessary to improve the economic situation of polish mining companies. The mining companies in Poland are operating under tremendous uncertainty of turbulent environment. The article presents used by the authors methods to facilitate the creation and selection of optimal production strategy. These are scenario planning, forecasting and linear programming, which allow the simulation of company operations in the future. The authors suggest the most successful an

APA, Harvard, Vancouver, ISO, and other styles

34

Morawski, Eugeniusz. "Restructuring the hard coal mining industry in Poland." Resources Policy 20, no. 3 (1994): 193–97. http://dx.doi.org/10.1016/0301-4207(94)90051-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Kędzierski, Przemysław. "Review of electrostatic hazards in hard coal mining." Mining - Informatics, Automation and Electrical Engineering 4 (534), no. 1 (2018): 17. http://dx.doi.org/10.7494/miag.2018.2.534.17.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Schürmann, Thomas. "Conditions for a Successful Farewell." (Post-)Industrial Memories. Oral History and Structural Change 31, no. 2-2018 (2020): 22–36. http://dx.doi.org/10.3224/bios.v31i2.03.

Full text

Abstract:

In 2018, when the last German hard coal mines were closed down, the conditions were relatively favourable, especially in the coal region of Ibbenbüren in Northern Westphalia. This district is marked by small towns and medium-sized enterprises with a relatively low unemployment rate. On the one hand, the shutdown without greater lay-offs was enabled by the co-working of the trade union and the mining company. This, on the other hand, depended to a large extent on external influences, not least on state subsidies and the preceding integration of the German hard coal industry into a rescue compan

APA, Harvard, Vancouver, ISO, and other styles

37

Krawczyk, Piotr, Marzena Majer, and Joanna Krzemień. "Proposal of Economic Assessment of Hard Coal Mines Operation Conducted in Polish Conditions with the Use of Cost Benefit Analysis." Archives of Mining Sciences 61, no. 4 (2016): 875–92. http://dx.doi.org/10.1515/amsc-2016-0058.

Full text

Abstract:

Abstract The paper presents possibilities of an economic evaluation of hard coal mines, using Cost Benefit Analysis (CBA). Suggested methodology for CBA applied to the economic evaluation of a mine allows to conduct a complex evaluation of mine’s functionality in connection to Polish conditions. Additionally to financial aspects, significant from the point of view of the mine’s owner, the paper includes social and environmental effects as a result of mining activities. Proposed methodology has undergone tests which used averaged data obtained from two selected hard coal mines located in the Up

APA, Harvard, Vancouver, ISO, and other styles

38

Burtan, Zbigniew, Dagmara Nowak-Senderowska, and Paweł Szczepański. "Methodology for Identification of Occupational Hazards Using Their Characteristic Features in Hard Coal Mining." Applied Sciences 15, no. 13 (2025): 7079. https://doi.org/10.3390/app15137079.

Full text

Abstract:

Ensuring employee safety is a top priority for every enterprise, and it is especially critical in high-risk industries like coal mining. To achieve this goal, it is essential to focus efforts on identifying existing hazards and thoroughly assessing the associated risks. Accurate identification and detailed characterization of occupational hazards play a pivotal role in the occupational risk assessment process, providing the foundation for effective safety strategies. This article presents an analysis of the process of identifying occupational hazards in hard coal mining, based on applicable le

APA, Harvard, Vancouver, ISO, and other styles

39

Marszowski, Ryszard, and Robert Hildebrandt. "Main objectives of the strategy, as well as motivations for the transformation of hard coal mining in Poland." Scientific Papers of Silesian University of Technology. Organization and Management Series 2024, no. 194 (2024): 315–238. http://dx.doi.org/10.29119/1641-3466.2024.194.18.

Full text

Abstract:

Purpose: in the cognitive space, the article focuses on the issue of dynamically growing social awareness of the impact of hard coal on climate change - which determines the need to implement a strategy to abandon this raw material. The authors of the article also point out that in connection with this process - as the world strives for sustainable and more ecological development - the transformation of the hard coal mining sector becomes an inevitable challenge. Methodology: the theses presented in the article were verified using the following methods: literature review, critical analysis of

APA, Harvard, Vancouver, ISO, and other styles

40

Cui, Feng, Shuai Dong, Xingping Lai, Jianqiang Chen, Jiantao Cao, and Pengfei Shan. "Study on Rule of Overburden Failure and Rock Burst Hazard under Repeated Mining in Fully Mechanized Top-Coal Caving Face with Hard Roof." Energies 12, no. 24 (2019): 4780. http://dx.doi.org/10.3390/en12244780.

Full text

Abstract:

The dynamic disasters caused by the failure of hard roof in the process of mining coal seriously affect the safe production in coal mines. Based on the W1123 mining coal working face of Kuangou coal mine, the physical similar material simulation experiment and acoustic emission (AE) monitoring method are used to study the failure law and AE characteristics of overburden in the process of coal mining. The stress evolution law is revealed through numerical simulation, the dangerous areas and rock burst hazard under the repeated mining with hard roof are studied combined with microseismic monitor

APA, Harvard, Vancouver, ISO, and other styles

41

Mocek, Piotr. "Defining of the required parameters of the main fans on the ventilation shaft for the target model of the hard coal mine Y in connection with its decommissioning." IOP Conference Series: Earth and Environmental Science 906, no. 1 (2021): 012052. http://dx.doi.org/10.1088/1755-1315/906/1/012052.

Full text

Abstract:

Abstract The article presents the results of the analysis and calculations of the ventilation network of the decommissioned hard coal mine Y for the model of its target operation. After the end of hard coal mining and the liquidation of most of the mining excavations, the former Y hard coal mine will become an element of the drainage system and a protection for other, still active mining plants. In order for the Y excavation to be transformed into a mine water pumping station, its ventilation system should be rebuilt, and new parameters of the main fan should be determined for a smaller networ

APA, Harvard, Vancouver, ISO, and other styles

42

Moellerherm, Stefan, Jürgen Kretschmann, Julia Tiganj, and Martha Poplawski. "Post-mining Challenges and Knowledge Transfer for the Ukrainian coal industry." IOP Conference Series: Earth and Environmental Science 970, no. 1 (2022): 012034. http://dx.doi.org/10.1088/1755-1315/970/1/012034.

Full text

Abstract:

Abstract The Ukraine has started to restructure its coal mining activities. The country will probably face similar challenges and obstacles that German hard coal mining had experienced. The restructuring of old mine sites to new economic hubs requires governance practices and efficient management processes. Best practice, lessons learned, training and reskilling approaches of the young generation from the coal mining region Ruhr area are described and how they can be transferred to the Ukraine.

APA, Harvard, Vancouver, ISO, and other styles

43

Lan, Yiwen, Rui Gao, Bin Yu, and Xiangbin Meng. "In Situ Studies on the Characteristics of Strata Structures and Behaviors in Mining of a Thick Coal Seam with Hard Roofs." Energies 11, no. 9 (2018): 2470. http://dx.doi.org/10.3390/en11092470.

Full text

Abstract:

The movements of overburden induced by mining a thick coal seam with a hard roof extend widely. The effects of breakages in the hard strata on the strata behaviors might vary with the overlying strata layers. For this reason, we applied a test method that integrated a borehole TV tester, borehole-based monitoring of strata movement, and monitoring of support resistance for an in situ investigation of a super-thick, 14–20 m coal seam mining in the Datong mining area in China. The results showed that the range of the overburden movement was significantly high, which could reach to more than 300

APA, Harvard, Vancouver, ISO, and other styles

44

Zhang, Qiang, Cong Wang, and Ying Tian. "Numerical and Experimental Study on Crushing Properties of Hard Coal Using Impacting-Cutting Technique." Shock and Vibration 2022 (February 9, 2022): 1–14. http://dx.doi.org/10.1155/2022/7091553.

Full text

Abstract:

The reserves of high-quality coal seams have been greatly reduced in recent years, and the low efficiency of traditional cutting methods in hard coal seams has become a problem for the coal production industry. In order to improve the mining efficiency, an impacting-cutting technique was proposed in this study. A drum modification model with picks impact function was established, and crushing properties of the impacting-cutting drum at f4, f5, and f6 coal hardness were simulated using the discrete element method. The simulation results show that the impacting-cutting drum has higher coal crush

APA, Harvard, Vancouver, ISO, and other styles

45

Marcisz, Marek. "Degree of Faulting of Hard Coal Deposits of Upper Silesian Coal Basin." Gospodarka Surowcami Mineralnymi 33, no. 2 (2017): 97–112. http://dx.doi.org/10.1515/gospo-2017-0013.

Full text

Abstract:

Abstract The paper presents the results of research on the degree of faulting of deposits/mining areas of the Upper Silesian Coal Basin having been carried out since the 1970s. The results of these works are comprised of an analysis of the density of faults and an of the faulting index for 26 deposits/mining areas in the borders of the USCB. The statistical presentation of the problem includes three main parameters that characterize the tectonic complication of hard coal deposits in the borders of mining areas: lineal density GUL, surface density GUP and synthetic faulting index WU. The compar

APA, Harvard, Vancouver, ISO, and other styles

46

Han, Hongkai, Jialin Xu, Xiaozhen Wang, Jianlin Xie, and Yantuan Xing. "Surface Subsidence Prediction Method for Coal Mines with Ultrathick and Hard Stratum." Advances in Civil Engineering 2019 (April 7, 2019): 1–15. http://dx.doi.org/10.1155/2019/3714381.

Full text

Abstract:

Overburden conditions consisting of ultrathick and hard stratum (UTHS) are widespread in China and other countries, but existing surface subsidence prediction methods ignore the strong impact of UTHS on surface subsidence. They are thus not applicable for surface subsidence prediction for coal mining with the presence of UTHS. We conducted actual measurements of surface and UTHS subsidence in the Tingnan Coal Mine. The results showed that under the UTHS mining condition, the required gob dimension is much larger than the empirical value when the surface reaches sufficient mining and that the a

APA, Harvard, Vancouver, ISO, and other styles

47

Luo, Hongye, Shun Liang, Qiangling Yao, et al. "Mechanism and Application of Hydraulic Fracturing in the High-Level Thick and Hard Gangue Layer to Improve Top Coal Caving in Fully Mechanized Caving Mining of an Ultra-Thick Coal Seam." Minerals 12, no. 12 (2022): 1605. http://dx.doi.org/10.3390/min12121605.

Full text

Abstract:

The thick and hard gangue layer has long been one of the key obstacles affecting the coal recovery rate in the fully mechanized top-coal caving mining of ultra-thick coal seams, and it is also one key factor restricting the development of the technology used for such work. In this study, to improve the poor top coal cavability and low recovery rate in fully mechanized caving mining of ultra-thick coal seams containing thick and hard gangue layers, the fully mechanized caving mining of longwall working face 42,108 of the Qinggangping Coal Mine is the engineering setting. Then, through a combina

APA, Harvard, Vancouver, ISO, and other styles

48

Kęsek, Marek, Paweł Bogacz, and Marcin Migza. "Study on the Usefulness of Lean Management Tools and Techniques in Coal Mines in Poland." Energies 16, no. 21 (2023): 7240. http://dx.doi.org/10.3390/en16217240.

Full text

Abstract:

The article presents research on the possibilities of utilising the Lean Management method to increase the profitability of coal mining operations through cost rationalisation and production optimisation. The Lean Management method has its roots in the automotive industry, but its significant benefits can allow it to be transferred to other industries. Based on the analysis of global literature describing examples of its application in general mining, as well as the authors’ own observations related to Polish hard coal mining, it was determined that the Lean Management method is not being util

APA, Harvard, Vancouver, ISO, and other styles

49

Xingen, Ma, Pan Jun, Zou Qinghai, et al. "Study on Mechanism and Main Influencing Factors of Rockburst under Complex Conditions of Hard and Deep Overburden." Shock and Vibration 2023 (November 13, 2023): 1–21. http://dx.doi.org/10.1155/2023/5582345.

Full text

Abstract:

Xinzhuang Coal Mine is a typical kilometer-deep rockburst mine in the Ningzheng mining area of China Huaneng Group, which is still in the capital construction period. At present, there are a few studies on the rockburst mechanism and prevention of this mine. In order to explore the occurrence mechanism and main influencing factors of rockburst under the complex geological conditions of large buried depth, thick topsoil, and hard overburden in Xinzhuang Coal Mine, this paper, based on the analysis of the basic geological data of the mine, deeply explores the comprehensive disaster factors of Xi

APA, Harvard, Vancouver, ISO, and other styles

50

Shen, Wen-long, Wen-bing Guo, Hua Nan, Chun Wang, Yi Tan, and Fa-qiang Su. "Experiment on Mine Ground Pressure of Stiff Coal-Pillar Entry Retaining under the Activation Condition of Hard Roof." Advances in Civil Engineering 2018 (October 18, 2018): 1–11. http://dx.doi.org/10.1155/2018/2629871.

Full text

Abstract:

In mining excavation, the retained entry with stiff coal pillar is situated in the strong mine ground pressure. Influenced by mining abutment stress and dynamic stress (the vibration signal) induced from the hard roof activation, the retained entry may be subjected to roof separation, supporting body failure, severe floor heave, and even roof collapse. Based on a 2D physical model, an experimental method with plane-stress conditions was used to simulate the mechanical behavior of the rock strata during mining. In this experiment, three monitoring systems were adopted to reveal the characterist

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!