Results 11 to 20 of about 1,192,587 (115)
Height of the Fractured Zone in Coal Mining under Extra-Thick Coal Seam Geological Conditions
Advances in Civil Engineering, 2021 The height of the fractured zone caused by coal mining is extremely significant for safely mining under water, water conservation, and gas treatment. At present, the common prediction methods of overburden fractured zone height are only applicable to ...
Dequan Sun +4 more
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Geofluids, 2021 The Datong mining area is a typical double system coal seam mining area in China, where the Jurassic and Carboniferous coal seams are mined simultaneously. The upper Jurassic coal seam has been largely mined, leaving a large amount of gob area.
Haixiao Lin +4 more
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Mining technology and practice of full-solid waste cemented backfilling in narrow strip of extra-thick coal seam under buildings [PDF]
Meitan kexue jishuThere is a great amount of coal pressed under buildings in our country, while the discharge of coal-based industrial solid wastes such as coal gangue and fly ash are increasing, which has severely restricted the local economic and social development ...
Lang LIU +6 more
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Water Formation and Inrush Risk of Overburden Strata for Extra-thick Coal Seam Mining
Meikuang Anquan, 2020 Based on the analysis of the hydrogeological data of the first mining area in Zhaoxian Coal Mine, by using the research methods of theoretical analysis, similar material test and numerical simulation, the separation layer of overburden strata and water ...
ZHANG Peisen, YAN Fenqian, SUN Yanan, WU Junda
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E3S Web of Conferences, 2018 Some coal seams belong to cretaceous strata in the east of Inner Mongolia, China. There are obvious differences of rock characteristics and mechanical properties between Cretaceous and Carboniferous- Permian strata. The overburden failure characteristics
Li Jianghua, Lian Yuguang, Li Hongjie
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Application of intelligent top-coal caving technology in overlying aquifer protection of extra-thick coal seam [PDF]
Meitan kexue jishuThe grassland areas in eastern Inner Mongolia and northern Xinjiang are rich in coal and groundwater resources. The mining fissures formed by high-intensity coal mining are easy to lead to the strong water-rich aquifer, and it is very easy to cause the ...
Weixuan CHENG +5 more
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Applied SciencesChannel wave seismic activity often occurs with thin and medium-thick coal seams being the main target layer. To address the problem of channel wave applicability detection in extremely thick coal seams, the propagation and identification characteristics
Tao Ding +5 more
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EnergiesUpper protective layer (UPL) mining is extensively utilised as a pressure relief strategy to prevent outbursts and coal bursts. However, when the excavation height of the protected layer is substantial, the depressurisation efficacy of the protective ...
Yanjiang Chai +5 more
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Failure properties of roadway with extra-thick coal seams and its control techniques
HeliyonThe dense conventional combined support hardly controls the overall subsidence of the roadway roof in extra-thick coal seam and affects the excavation efficiency, leading to the technical problem of mining proportion imbalance in the mine. In this study,
Yiming Zhao, Nong Zhang, Jian Wang
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Geofluids, 2021 In order to reveal the evolution law of gas discharge of carbon monoxide in mining an extra-thick coal seam of the Datong mining area by the numerical simulation and field monitoring test, the 8202 working face and 8309 working face in the Tongxin coal ...
Zhanyuan Ma, Feng Du
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