Results 31 to 40 of about 531 (168)
Numerical Simulation Study on Fully-Mechanized Top Coal Caving in Extra-Thick Coal Seam
IOP Conference Series: Earth and Environmental Science, 2020 Abstract Three working face of a mine 250203, 250205, 250206 as the research object, the establishment of a geomechanical model according to the actual situation of the project. FLAC3D using numerical simulation method to analyze section coal pillar width in 20 m, 10 m, when 0 m, Face sequential mining process key strata caving stride ...
Wu-lin Lei +4 more
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Gong-kuang zidonghua, 2020 In the context of intelligent fully mechanized caving and mining, it is important to consider not only the cutting by the shearer, but also the coal caving at the back of the support and top coal recovery.
HAN Xiuqi +4 more
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Sudden change mechanism of mine pressure in fully mechanized caving face and its countermeasures
Meikuang Anquan, 2022 In view of the sudden change of mine pressure in 226 upper 02 fully mechanized caving face of Huangyuchuan Coal Mine, the mechanism and countermeasures of sudden change of mine pressure in fully mechanized caving face are studied by using the methods of
LI Yong, WANG Zhuoying
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Meikuang Anquan, 2021 Aiming at the problem of over-limit gas in the return air corner of the “U” type downward ventilation fully mechanized caving face in Baode Coal Mine, the law of gas migration in the stope and goaf was studied. Using Fluent numerical simulation software
ZHANG Zenghui, XUE Yanping
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Processes, 2022 In recent years, with the rapid development of equipment manufacturing and advances in the research on mine pressure and rock mechanics, large-mining-height comprehensive mechanized coal mining technology has become increasingly widely used in thick-seam mining.
Li Li, Xiao Zhang, Jianqiao Luo, Bin Hu
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Dynamic Random Arching in the Flow Field of Top-Coal Caving Mining
Energies, 2018 The large mining height fully mechanized top-coal caving mining technique has developed rapidly and become the most extensively used mining method for ultra-thick coal seams. The arching of coal/gangue and the drawing out of gangue are peculiar phenomena
Ningbo Zhang +3 more
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Study on strata behavior law of weak cohesive roof in deep buried fully mechanized top coal caving face [PDF]
E3S Web of Conferences, 2021 In view of the severe ground pressure behavior and spontaneous combustion risk of goaf in fully mechanized top coal caving face with deep buried weak cohesive roof and thick coal seam prone to spontaneous combustion, combined with theoretical analysis of
Ren Qihan
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Influence of Refuse Content on Economic Benefits for Fully Mechanized Top Coal Caving
Procedia Engineering, 2011 AbstractIn order to study the influence of refuse content on economic benefits and realize ending drawing top-coal reasonably for fully mechanized top coal caving, relationship between refuse content and drawing interval has been analyzed, and drawing law of loose top-coal with different drawing interval has been simulated by PFC2D software.
Zhang, Yong +6 more
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Applied Sciences, 2022 To study the caving of thick hard overburdens and evolution of water-conducting fracture zones in fully mechanized top-coal caving faces of gently inclined extra-thick coal seams, we comprehensively analyzed the 8103 working face of the Beixinyao Coal ...
Yang Zhou, Xueyi Yu
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Meitan xuebaoThe fully mechanized top-coal caving support is a critical device that serves both as a support mechanism and an active means for top-coal caving in fully mechanized top-coal caving mining operations.
Qingliang ZENG +5 more
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