Results 11 to 20 of about 7,043 (214)
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 ...
Hongfei Duan +4 more
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International Journal of Mining Science and Technology, 2020 The size distribution of the broken top coal blocks is an important factor, affecting the recovery ratio and the efficiency of drawing top coal in longwall top coal caving (LTCC) mining panel.
Jiachen Wang +4 more
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A review of cavability evaluation in longwall top coal caving
International Journal of Mining Science and Technology, 2017 Longwall Top Coal Caving has been considered as one of the most effective technologies for the extraction of underground thick coal seams. A large number of studies on the applicability of Longwall Top Coal Caving into new mine sites have linked the ...
Tien Dung Le +3 more
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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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Journal of Rock Mechanics and Geotechnical Engineering, 2015 AbstractBased on the loose medium flow field theory, the loose top-coal drawing law of longwall top-coal caving (LTCC) mining technology is studied by using self-developed three-dimensional (3D) test device. The loose top-coal drawing test with shields and the controlled test without shields are performed in the condition without any boundary effect ...
Jiachen Wang +3 more
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Structure and deformation measurements of shallow overburden during top coal caving longwall mining
International Journal of Mining Science and Technology, 2017 Mining induced pressures are strong and overburden failure areas are large in top coal caving longwall mining, which constrains high production and safety mining.
Sheng Li +5 more
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Automatic control system of top coal caving on fully-mechanized coal mining face
Gong-kuang zidonghua, 2015 In view of problems of large randomness, low efficiency of coal caving of artificial operation for top coal caving mining face, an automatic control system of top coal caving on fully-mechanized coal mining face was designed.
WEI Wenya
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Longwall top coal caving automation concept [PDF]
E3S Web of Conferences, 2021 This paper describes history of the longwall top coal caving technology. The devices capable to promote wider application of LTCC are discussed. The advantages, shortcomings and their elimination methods are specified. The authors designate the objectives to be met to implement the maximum potential of LTCC. The industry approach to these objectives is
Nikitenko Sergey +3 more
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3D experimental investigation of multi-port caving technology in LTCC with extra-thick seams
矿业科学学报, 2023 This paper investigated the multi-port caving technology to improve the top coal recovery and caving efficiency of the longwall top coal caving(LTCC)in extra-thick seams.The 3D drawing experiments are designed based on the actual geological conditions of
Li Meng, Wei Weijie, Zhang Xin
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Technology path and assumptions of intelligent surrounding rock control at longwall working face
矿业科学学报, 2022 The intelligent surrounding rock control at longwall working face is the necessary condition to realize the intelligent mining of working face. This paper redefined the connotation of the surrounding rock system at longwall working face and clarified the
Yang Shengli, Wang Jiachen, Li Ming
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