The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and …
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The wastewater from coal-mine industry varies greatly and is resistant to biodegradation for containing large quantities of inorganic and organic pollutants. Microorganisms in activated sludge are responsible for the pollutants' removal, whereas the microbial community composition and structure are …
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— The stability of the arm of F-structure and connected rock blocks especially block B as shown in Fig. 4 a significantly affected the strata behaviors of the working face, mining tremors occurred frequently in the gob and around the roadways. Fig. 1 above illustrates "Voussoir Beam" structure diagram of rupture roof formed after coal …
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— Currently, the study of coal structure variation under an acid environment mainly focuses on releasing coalbed methane (Dong et al., 2023; ... A scientometric analysis of trends in coal mine water inrush prevention and control for the period 2000–2019. Mine Water Environ., 39 (1) (2020), pp. 3-12, 10.1007/s10230-020-00661-2.
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— A coal mine underground reservoir in Shendong mining area is selected as the research object. The geometric shape, size and material properties of the underground reservoir are collected. ... Wen ZJ, Jing SL, Song ZQ, et al. Study on coal face spatial structure model and control related dynamic disasters [J]. Coal Sci. Technol., 2019, …
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generated by coal and uranium, both products of mining. We are surrounded by these raw materials — minerals and coal — that make nearly everything possible in our . ... atomic …
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— At the same time, the geological structure of coal mine will also cause a large change in the state and mechanical properties of the gas in the nearby rock body (Li, et …
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— The flameproof rock powder shed and flameproof water bag are disposable equipment, which cannot play an flameproof role when secondary explosion or multiple explosions occurs in coal mine. Therefore, it is of great significance to solve the problem of multiple explosion isolation and achieve stable and reliable multiple explosion isolation …
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— Along with the increase in the coal mining sector, incident in the coal mining sector has decreased. Typical of coal mining activities is very strict safety regulations. Regulation in Mining Safety Management System is the role of the Indonesia government to be approved and provides clear rules in the OSH & Safety Operational system.
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— We present a super-range seismic observation along the >1300-km-long profile passing through the Yinchuan basin and the Ordos block from the blasting point towards the southeast triggered by a large-(dynamite) scale coal blast in the Ningxia Hui Autonomous Region's Helan Mountain (yielded a profile). The seismic wave information …
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— With the increasing depth of coal mining, the quantitative evaluation of the degree of geological structure development is becoming increasingly important for the control of mine water hazards in coal mining areas. Understanding the complexity of geological structure development can improve the safety and efficiency of coal …
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— According to the coal seam gas content and gas relative emission, it is predicted that the upper limit of gas relative emission in the mine will change from 1.38 to 20.30 m³/t·d, which is a low ...
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— Assessment of soil microbial diversity, in terms of the actively growing population, may be a sensitive indicator of ecological stress and restoration processes. During this study, the relationship between microbial community structure; vegetation cover; and physical and chemical characteristics of topsoil covers at seven coal discard …
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Morupule Coal Mine (MCM), initially known as Morupule Colliery, was established in 1973 as a subsidiary of Anglo American Corporation. MCM has grown from a 30 thousand tonnes per annum via conventional …
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— In the post-extraction epoch, wastewater from mining activities, particularly acid mine drainage (AMD) residing in sulfur-laden coal terrains, assumes a pivotal role in the safety stewardship of decommissioned coal mines. This research aims to investigate the mechanism behind coal characteristic deterioration from prolonged exposure to AMD.
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— Coal is a natural mixture, and its structure is complex, diverse and heterogeneous, and different coal ranks have different structures. The molecular …
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— Coal mine safety management index system and environmental risk model based on sustainable operation. Author links open overlay panel Wenwang Yang a, Sanlin He b. ... "Paradigm" comes from the book "The Structure of Scientific Revolutions", which refers to the theoretical basis and practical norms on which scientific research operates ...
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— The top-layer design of intelligent coal mine was carried out, and the ideas of the integrated planning development mode of intelligent coal mine, the scientific design on the overall framework of ...
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— The “Oâˆ'X†structure caused by the key strata is the basic form of spatial structure evolution in coal mine, as well as the boundary and important part of other spatial structures. 3.2 “F†structure of workface with one side adjacent to gob The workface, which one side adjacent to the gob with small pillar between them ...
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and maintenance of a Management Structure at a Queensland coal mine. 2.2 Application . This Recognised Standard applies to all Coal Mines as defined under the CMSHA and relates to the requirements of sections 7, 41, 42, 55, 60 and 66 of the CMSHA. ... •Coal Mine Operator ensure SSE develop and maintains a management
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Coal Analysis - The determination by chemical methods of the amounts of various components of coal. Coal Ash - Non-combustible material in coal. Coal Bank - Exposed seam of coal. Coal Basin - A coal field with a synclinal basin structure. Coal Bump - Sudden outbursts of coal and rock that occur when stresses in a coal pillar,
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Coal production requires mining in either surface (strip) or underground mines. Surface mining leaves pits upon coal removal, and to prevent soil erosion and an unsightly environment, operators must reclaim the land, …
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— coal mining, extraction of coal deposits from the surface of Earth and from underground. Mongolia: coal mine Tavantolgoi coal mine, southern Gobi, Mongolia. Coal is the most abundant fossil fuel on Earth. …
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— The mechanical properties of coal rocks depend on the in situ stress, mining layout, temperature and water pressure etc., 24, 25 but the influence of water-soaking time on the changes in pore structures, composition, surface morphology and elasticity was intended to be the focus. Therefore, in the present work, the time-dependent effects of …
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— The experimental results show that the fractal dimension of the mine mostly ranges from 0.7 to 1.6. The fault structure becomes more complex with the increase of fractal dimension, and the gas content in the region with a larger fractal dimension is higher. The fractal dimension of fault can reflect complexity of geological structure of the mine.
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— Coal has remained the primary component of China's energy structure, and high-intensity extraction has continued in the central and western coal-producing regions of China. In contrast to the abundant coal resources, water resources have become extremely scarce in these regions, creating a conflict between coal resource extraction and water …
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Origin, Composition, and Structure of Coal Geologists believe that underground coal deposits formed about 250–300 million years ago, when much of Earth was swamp covered with thick forest and plant growth. ... in the coal, producing acid mine water. When pumped out of the mine and into nearby rivers, streams, or lakes, the mine water ...
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— The molecular formula of non-caking coal in Chicheng Coal Mine was determined to be C 207 H 181 O 32 N 3 S.The 13 C NMR-predicted spectrum of the model showed good consistency with the 13 C NMR-experimental spectrum obtained from the experiments, providing researchers with reference to the construction ideas and …
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— Structure) for Safety Planning of Coal Mine Project with Surface Mining. Methode. To cite this article: Faqih Andy Maulana and Yusuf Latief 2020 IOP Conf. Ser.: Mater. Sci. Eng. 1007 012005.
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— In this article to assess the effectiveness of the coal mine working face technological structure the authors propose to use the original indicators. These indicators enable to make a comprehensive assessment of the coal mine working face technological structure "before" and "after" the implementation of the improved technological ...
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