Results 1 to 10 of about 531 (168)
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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An analytical methodology of rock burst with fully mechanized top-coal caving mining in steeply inclined thick coal seam. [PDF]
Sci Rep, 2023 Abstract Rock burst disaster is still one of the most serious dynamic disasters in coal mining, seriously restricting the safety of coal mining. The b value is the main parameter for monitoring rockburst, and by analyzing its changing characteristics, it can effectively predict the dangerous period of rockburst.
Shan P, Yan Z, Lai X, Xu H, Hu Q, Guo Z.
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Meitan kexue jishu, 2023 At present, intelligent coal caving in high gas fully mechanized top coal caving face is facing many problems, mainly including poor recognition accuracy of coal gangue, incomplete control research on coal flow and gas concentration, cumbersome design ...
Yao CUI +3 more
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Study on the Structural System of Roof in Fully Mechanized Top Coal Caving [PDF]
Applied Mechanics and Materials, 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. The simplified model of roof structure was built in final.
Jie Shen, Da Meng, Li Ke Wei
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Boundary distribution of top-coal limit-equilibrium zone in fully mechanized caving in steeply dipping coal seams [PDF]
Geomatics, Natural Hazards and Risk, 2021 In fully mechanized caving mining, the earlier the top coal enters the limit-equilibrium zone, the easier it is for leakage to be induced in front of the support. As the dip angle of the seam increases, the leakage of the top coal in front of the support drastically reduces the stability of the stope support–surrounding rock system.
Haifei Lin, Shenghu Luo
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Mechanism of stress-loaded rockburst in fully mechanized top-coal caving stope with deep overburden
Meitan xuebao, 2023 The stress-loaded rockburst is a unique type of rockburst that occurs in some fully mechanized top-coal caving stopes with deep thick overburden, its occurrence mechanism is still unclear, leading to the failure to effective prevention and even serious ...
Xiang ZHANG +10 more
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International Journal of Mining Science and Technology, 2014 Abstracts Based on break characteristics of roofs in fully mechanized top-coal mining of thick shallow coal seams, a fracture mechanics model was built, and the criterion of crack propagation in the main roof was derived using the fracture mechanics theory.
Xiexing Miao, Yanli Huang
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International Journal of Mining Science and Technology, 2018 When mining the fully-mechanized longwall caving face along strike, the unstable equipment, the low top-coal recovery ratio and the difficulty in controlling surrounding rock may occur due to large dip angle.
Hu Shaoxuan +3 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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Meikuang Anquan, 2020 This paper systematically summarizes the development process of fully mechanized top coal caving technology and equipment in Yankuang Group in recent 30 years.
MENG Xiangjun, LI Mingzhong, YUE Ning, SUN Jishuang
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