Results 131 to 140 of about 531 (168)
Research on overburden structural characteristics and support adaptability in cooperative mining of sectional coal pillar and bottom coal seam. [PDF]
Sci RepFeng D +6 more
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Construction of multiphysics coupling equations and study on flow field migration patterns in shallow buried goaf under air leakage conditions. [PDF]
Sci RepPan J, Qiu C, Zhao D, Liu L, Yuan Q.
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Mechanism and field validation of fly-ash grouting for mitigating mining-induced surface subsidence. [PDF]
Sci RepDing C, Qin Y, Cao C.
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Arabian Journal of Geosciences, 2016
This study investigates the flow and caving characteristics of top coal and roof rock, as well as top coal loss pattern in the fully mechanized top coal caving mining of extra thick coal seams. The two dimensional discrete element numerical simulation software program, particle flow code (PFC), is used for the simulation of top coal caving and the ...
Changyou Liu +2 more
exaly +2 more sources
This study investigates the flow and caving characteristics of top coal and roof rock, as well as top coal loss pattern in the fully mechanized top coal caving mining of extra thick coal seams. The two dimensional discrete element numerical simulation software program, particle flow code (PFC), is used for the simulation of top coal caving and the ...
Changyou Liu +2 more
exaly +2 more sources
Analyses on factors influenced top-coal caving of fully mechanized mining for thick coal seam
2011 Second International Conference on Mechanic Automation and Control Engineering, 2011For the actual implementation of fully-mechanized caving mining in thick coal seam in China, systems analysis of the influence factors of top coal capability, including natural geological factors and technology factors. Influence factors of top coal capability, constitute analysis of fully mechanized caving coal loss, thereby reducing loss of coal ...
null Renjie Gao +2 more
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Analysis on the Breaking Law of Soft and Thick Roof of Fully Mechanized Top-Coal Caving Face
Geotechnical and Geological Engineering, 2020The study of roof breaking law is very important for the behavior of the underground pressure in fully mechanized top-coal caving face under the condition of weak roof. In this paper, the research is to study the soft and thick roof breaking law in the fully mechanized top-coal caving face 2–100 in coal seam 2#.
Dezhong Kong, Qiang Li, Guiyi Wu
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International Journal of Rock Mechanics and Minings Sciences, 2009
Abstract A key issue in underground mining is to understand and master the evolving patterns of stress induced by mining, and to control and utilize the action of rock pressure. Numerical and physical modeling tests have been carried out to investigate the distribution patterns of stress in the rock surrounding a fully mechanized top-coal caving ...
G.X. Xie, J.C. Chang, K. Yang
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Abstract A key issue in underground mining is to understand and master the evolving patterns of stress induced by mining, and to control and utilize the action of rock pressure. Numerical and physical modeling tests have been carried out to investigate the distribution patterns of stress in the rock surrounding a fully mechanized top-coal caving ...
G.X. Xie, J.C. Chang, K. Yang
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Advanced Materials Research, 2015
Using numerical simulation method,fully mechanized top coal’s caving property of Tang gong ta coal mine was studied.The results show at primary mining period of fully mechanized working face, there were stress concentration regions at the front and rear of coal wall,but it was not distinct in the front and top coal’s caving property was not ideal.When ...
exaly +2 more sources
Using numerical simulation method,fully mechanized top coal’s caving property of Tang gong ta coal mine was studied.The results show at primary mining period of fully mechanized working face, there were stress concentration regions at the front and rear of coal wall,but it was not distinct in the front and top coal’s caving property was not ideal.When ...
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Mining, Metallurgy & Exploration, 2021
In a fully mechanized top coal caving mining process, the mechanical properties of the top coal deteriorate constantly, and the stability of the support is determined by the boundary position of the top coal entering the limit equilibrium state. Top coal flaking occurs more easily along the advancing direction owing to an increase in the distance of ...
Ding Lang +6 more
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In a fully mechanized top coal caving mining process, the mechanical properties of the top coal deteriorate constantly, and the stability of the support is determined by the boundary position of the top coal entering the limit equilibrium state. Top coal flaking occurs more easily along the advancing direction owing to an increase in the distance of ...
Ding Lang +6 more
openaire +1 more source
Numerical simulation of hard top-coal's pulsed caving in fully mechanized caving face
2010 International Conference on Mechanic Automation and Control Engineering, 2010In order to improve the top-coal recovery in fully mechanized longwall face, the hard top-coal caving was simulated through particle flow program in three dimensions. According to the pressing cracking test of hard coal, the top-coal's fragmentation size and spatial distribution were simulated.
Jinping Wei +3 more
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