Energy Science & Engineering, 2022 Extra‐thick coal seams are widely distributed in the Datong mine area in China. The rapid stopping of mining and the support withdrawal technology for extra‐thick coal seams need to be developed urgently. The reasonable stopping top coal caving distance,
Shengrong Xie +9 more
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Development of 3D top coal caving angle model for fully mechanized extra-thick coal seam mining
International Journal of Mining Science and Technology, 2022 During high-intensity, fully mechanized mining of extra-thick coal seam, the top coal would cave to a certain 3D form. Based on the data collected during drilling, a 3D model of top coal caving surface space was established to determine the relationship between the location of the stope roof and the caving surface, enabling the mathematical computation
Hongfei Duan +4 more
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Strata behavior in extra-thick coal seam mining with upward slicing backfilling technology
International Journal of Mining Science and Technology, 2016 Abstract Based on the character of upward slicing backfilling mining and the condition of Gonggeyingzi coal mine in Inner Mongolia, this paper describes the studies of the strata behavior and the stress distribution in the process of backfilling mining in extra-thick coal seams.
Xuejie Deng +3 more
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Research on bending-slip rib spalling and rib stability of extra-thick hard coal wall [PDF]
Scientific ReportsIn response to the frequent occurrence of coal face spalling affecting the working face production during the mining of extra-thick hard coal seams, this study investigates the characteristics of typical hard coal face damage.
Bo Xue +4 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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Research on the technology of unloading pressure and preventing punching in extra-thick coal seams [PDF]
Scientific ReportsThis study addresses stress concentration in roadways and elastic energy accumulation in the cantilever beam of hard roofs within the goaf of extra-thick coal seams. Using the 61,607 working face of Longwanggou Mine as a case study, the key roof layer was identified through theoretical calculations, and hydraulic fracturing parameters were optimized ...
Lixin Zhang +4 more
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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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Overlying strata movement law and rockburst prevention & control for fully mechanized top coal caving face in extra-thick coal seams [PDF]
Scientific ReportsTo investigate the movement law of overlying strata in the fully mechanized top-coal caving face of extra-thick coal seams and further achieve the effective prevention and control of rock burst. Taking the 12,240 working face of Gengcun Coal Mine as the engineering background, initially, the calculation formula for the collaborative deformation load of
Hai Rong +7 more
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Study on the linkage mechanism between key strata fracture in overburden and surface subsidence during caving mining in extra-thick coal seams [PDF]
Scientific ReportsCaving mining in extra-thick coal seams induces large-scale overburden movement, leading to more intense fracture processes in key strata, more significant surface subsidence, and frequent dynamic disasters in mines.
Tianwei Lan +5 more
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Numerical simulation on fracturing behaviour of hard roofs at different levels during extra-thick coal seam mining. [PDF]
R Soc Open Sci, 2020 Gao R, Huo B, Xia H, Meng X.
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