Results 31 to 40 of about 1,698,756 (161)
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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Numerical and in-situ investigation on the ground behavior of the end roof in fully mechanized caving face [PDF]
E3S Web of Conferences, 2021 Fully mechanized top coal caving is a major high-yield and high-efficiency coal mining method for thick seam mining. At present, it is affected by the further popularization and application of fully mechanized caving mining because the recovery rate is ...
Zang Chuanwei +5 more
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Migration law of different top coal thicknesses in top coal caving
Frontiers in Earth Science, 2022 Top coal caving has become one of the main mining methods for thick and extrathick coal seams. Because of coal seam conditions, the top coal thickness is not constant. It is necessary to study the influence of top coal thickness changes on the top-coal-caving mining process.
Hua Nan, Hua Nan, Shuai Wang
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Analysis and Engineering Practice of Factors Affecting Top-Coal Recovery in a Large Dip Coal Seam
Advances in Civil Engineering, 2022 The recovery of top coal in the caving face directly impacts the efficiency of mining coal resources. The geological conditions and mining parameters are well known to be significant influences on the recovery of top coal. This study focused on the 9-301
Xinglong Huang +11 more
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Energy Exploration & Exploitation, 2022 In view of solving the problems of large top coal loss and low recovery rate in the traditional caving process of horizontal section fully mechanized caving mining, taking the fully mechanized caving face of steeply inclined and extra-thick coal seam in ...
Fengfeng Wu +7 more
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Study on the Structural System of Roof in Fully Mechanized Top Coal Caving
, 2011 Based on the structural characters of roof in fully mechanized top coal caving, mechanical analysis, mechanical calculation and simulation experiment were used to explore the particularity of roof structure in fully mechanized top coal caving.
Jie Shen +5 more
core +3 more sources
Energy Science & Engineering, 2022 AbstractTraditionally, longwall top coal caving (LTCC) panels adopt the single‐window drawing mode and their drawing efficiency is relatively low. The synchronous multi‐window drawing (SMWD) mode is a remarkable approach to resolve the incompatibility between shearer coal mining and top‐coal drawing.
Tielin Zhao +5 more
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Top coal recovery at different caving positions.
, 2023 The re-mined face using top coal caving system is the most applicable method for recovering the remaining reserves of a previous partially-mined thick coal seam.
Chunhua Zhang (148898) +3 more
core +1 more source
Drawing mechanisms for top coal in longwall top coal caving (LTCC): A review of two decades of literature [PDF]
International Journal of Coal Science & Technology, 2021 AbstractThis review details the state of the art in research on top coal drawing mechanisms in Longwall top coal caving (LTCC) by examining the relevant literature over the last two decades. It starts with an introduction of the brief history and basic procedures of LTCC.
Jiachen Wang +4 more
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