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China is one of the very few countries using coal as its dominant energy resources,with the coal production exceeding one thirds of the total in the world.Some problems relating to coal mining are serious,such as resources destruction,environmental damage,and production accidents.Thus,Chinese scholars firstly proposed the concept of green mining of coal resources and scientific research and technological system for realizing the green mining.Then they put forward the academic viewpoint of realizing scientific mining.In this paper,we discuss,from the connotation and the basic system of the green mining,the structure theory of mining-induced rock mass,and the seepage theory of mining-induced rock mass,the main progresses achieved in the basic research of the coal resource green mining.According to the technical innovations of simultaneous extraction of coal and gas,water preserved mining,and the coal mining with gangue backfilling,we summarize the important progress in the coal
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2019-7-18 The annual solid waste produced by coal mining is as many as seven million tons in China, but the governance ratio is less than 10% (Yang 2012). Furthermore, the waste generated by open pit mining causes the destruction and occupation of cultivated lands of nearly 280,000 acres, and this number is increasing at a rate of 12,000 acres a year.
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2011-1-1 The mining area is 448944m 2. Coal 9 mined at the working face is black, bulk, basically semi-bright and rich in vitrain. Its thickness is 11.50-14.48m, 13.01m in average. Its seam is steady and dip angle is 1.2 - 4.9e, 2.5 eon average.
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2021-7-23 T he coal industry in the United States—encompassing coal mining, processing, and transportation—is a relatively small but vitally important component of the nation’s economy. Coal provides nearly a quarter of all energy supplies in the United States, with most of this coal
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2021-4-2 coal mines. In 2018, the production of coal in the Ordos reached 616 million tons. Along with a large number of coal mining regions in Ordos, ground fissures, ground collapse, and land subsidence have undermined the land surface eco-systems [1–3]. The land subsidence caused by coal mining in this area has the characteristics of high subsidence rate
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Coal mining in northwestern China is an important industry, and the Ordos Basin is known for its rich coal resources. Ordos, located in Inner Mongolia, China, is one of the important locations for super coal mines. In 2018, the production of coal in the Ordos reached 616 million tons.
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The numerical simulation software of UDEC (Universal Distinct Element Code) was used to contrast and analyse the characteristics of surrounding rock stress distribution and overlying rock horizontal displacement under the condition of different length of coalface, then it was indicated that the surrounding rock deformation was less when length of coalface was 110 m which was advantageous for roof control; according to the conditions of roof and floor, the roof
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2021-6-7 The research on the key factors of surface subsidence in paste backfilling mining of thick coal seam in deep mine is a complex system engineering, which involves mining, backfilling, support, subsidence, safety, and other aspects.
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2019-9-16 Zhao, P., Zhuo, R., Li, S. et al. Research on the effect of coal seam inclination on gas migration channels at fully mechanized coal mining face. Arab J Geosci 12, 597 (2019). https://doi.org/10.1007/s12517-019-4742-0. Download citation. Received: 06 January 2019. Accepted: 27 August 2019. Published: 16 September 2019
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2014-1-1 The main working bed thickness is average 2.5 m, dip angle of coal seam average is 51°, and thickness of adjacent coal seam is 2.2 m on average and have an average of 27 m to main working seam space. The long of mining workface is about 75 m and advancing speed is 3.5 m/d and mining intensity is about 725 t/d.
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China is a country with rich coal, coal mining plays an important role in our country's energy security. But at the same time, in support of national progress of energy industry and national economic development, coal mining has caused a lot of damage to the ecological environment and social issues. The exploitation of underground resources not only leaded to the ground the destruction of ...
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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 ...
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2021-7-23 Additional research is needed to mitigate the adverse environmental impacts associated with past, existing, and future coal mining and processing. Research activities should focus particularly on developing techniques to mitigate the alteration and collapse of strata overlying mined areas, to model the hydrological impacts of coal mining
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2021-4-7 Browse Coal mining news, research and analysis from The Conversation Menu Close Home ... Articles on Coal mining. Displaying 1 - 20 of 94 articles. Darren England/AAP April 7, 2021
Read MoreAimed at the specific geological conditions of 7# thin coal seam in Liuquan Mine, this paper used the methods of numerical calculation and theoretical analysis to determine the reasonable technological parameters of high-grade conventional mining face. The numerical simulation software of UDEC (Universal Distinct Element Code) was used to contrast and analyse the characteristics of surrounding ...
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2021-1-22 The majority of coal is derived from open-cast mines (±53%) and underground bord-and-pillar operations (40%), while stoping (4%) and longwall mining (3%) make up the balance. the importance of coal mining in south Africa Coal is South Africa’s most plentiful and cheapest source of energy. The coal has a low to
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2021-7-1 Australian black coal mining industry is expected to generate revenue of approximately $60 billion by the end of 2013 with revenue growth of over 9.5% compared to the rate and growth revenue five years before. The biggest factor is the higher annual coal prices and growing production over the last five years and these factors have contributed ...
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Exploitation multiplayer seam few theoretical and technical foundation at home and abroad, affecting the validity of the mining, rationality. although a lot of research on theory and technology of coal mining over the years[1~5], But it was not able to an overall comprehensive analysis of upper goaf adjacent goaf and overlying the coal pillar ...
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Research on Hydraulic Support Selection of Unmanned Fully－mechanized Coal Mining Face Yongsheng Yang. 1, a, Xuewen Li. 2, b . and Lizhi Zhang. 3, c . 1
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2021-3-15 Research Article Research on the Evolution Characteristics of Floor Stress and Reasonable Layout of Roadways in Deep Coal Mining Yang Yu ,1,2 Lianying Zhang ,1 Jianfei Lu ,1 Dingchao Chen,1 Xiangqian Zhao,3 and Limin Liu2 1School of Civil Engineering, Xuzhou University of Technology, Xuzhou 221111, China 2Tai’an Fangzhou Mining Technology Co., Ltd., Tai’an 271024, China
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2021-7-22 Coal mining research and development (RD) are carried out by a range of organizations and entities—federal government agencies, state government agencies, equipment manufacturers, academic institutions, and industry. In general, the scope of and motivation for research
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Coal mining and air pollution. In the era of 21st century, this belt has become an industrial hub. Along with MCL, a good number of coal-based thermal power plants, several heavy industries, coal washeries, and a large number of subsidiary industrial units have come up in the area.
Read More2021-7-23 Additional research is needed to mitigate the adverse environmental impacts associated with past, existing, and future coal mining and processing. Research activities should focus particularly on developing techniques to mitigate the alteration and collapse of strata overlying mined areas, to model the hydrological impacts of coal mining
Read MoreThis 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 ...
Read More2021-1-22 The majority of coal is derived from open-cast mines (±53%) and underground bord-and-pillar operations (40%), while stoping (4%) and longwall mining (3%) make up the balance. the importance of coal mining in south Africa Coal is South Africa’s most plentiful and cheapest source of energy. The coal has a low to
Read More2020-12-9 Purpose. The purpose of this research is to identify and study the contextual relationships of the significant lean enablers in the Indian coal mining industry using the application of interpretive structural modeling (ISM), matrice d' impacts croisés-multiplication appliquée á un classement (MICMAC) and structural equation modeling (SEM).
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2019-7-1 coal [2]. The main coal field of Jharkhand are Jharia coal fields (JCF) having about almost 63 bn tons of coal production. Coal accounts for the 60% of the country’s energy need and is the major source for power generation in India [2]. A typical coal mining area is generally affected by air, water,
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Water environment problems induced by mining were studied. Influences of coal mining on runoff of rivers and on water sources were discussed. And the forming mechanism of acid water was analyzed. The result shows that the mining activity is gradually changing the eco environment of adjacent areas, especially the water. With the water sources being continually polluted, the underground water ...
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The result of land use in coalfield is important to sustainable development in resourceful city. For surface morphology being changed by subsidence, the mining subsidence becomes the main problem to land use with the negative influence of ecological environment, production and steadily develop in coal mining areas. Taking Panyi Coal Mine of Huainan Mining Group Corp as an example, this paper ...
Read More2021-2-25 Today, Urgewald, Reclaim Finance, Rainforest Action Network, 350.org Japan and 25 further NGO partners published groundbreaking research on the financiers and investors behind the global coal industry. “This is the first time anyone has attempted to analyze commercial banks’ and institutional investors’ exposure to the entire coal
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الصين -تشنغ تشو -المنطقة الوطنية للتنمية الصناعية للتكنولوجيا المتطورة، جادة العلوم رقم 169.
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