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Stress and microseismic activity in hard roof thick coal seams under varying mining rates. [PDF]
Sci RepGu ST +5 more
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Simulation of deformation characteristics of irregular rock specimens with different mining face lengths. [PDF]
Sci RepZhang Y +5 more
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Numerical simulation on the delivery law of gob gas of fully mechanized caving face
Science in China Series A: Mathematics, 2008According to the cover rock caving features, the gob of fully mechanized caving face was divided into 3 zones: natural collected zone, pressure effecting zone and press stable zone. Based on these and the gob gas flow control equation, and considered the influence to the mining fissured zone of gas drainage, also made use of CFD software, we found an ...
Shugang Li
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Gas Control Technology of Fully Mechanized Caving Face of Hard Desorbing Coal Seam
Advanced Materials Research, 2013Basing on the problems of residual coal in goaf in fully mechanized caving face in hard desorbing coal seam, high content of residual gas, large gas emission, serious gas overrun in return airflow corner and vitiated air, combing the actual situation in 3-219 fully mechanized caving face, the paper has adopted adjacent goaf drainage, drainage in gas ...
Hai Yang Wang +2 more
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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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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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Measurement and Analysis for Gas Emission Characters in Fully Mechanized Caving Face
Applied Mechanics and Materials, 2013According to the practical condition of 3401 fully mechanized caving face in Dayang coal mine, the relationship between strata behaviors, mining technology and stope gas emission are analyzed through real-time monitoring of the support working resistance, advance abutment pressure and gas concentration of working face.
Xin Jian Li +3 more
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Technological optimization of fully mechanized caving mining face with large mining heights
Journal of Coal Science and Engineering (China), 2013Fully mechanized cave mining with large mining height is a new mining method, due to its large mining thickness and lower roadway excavation, the technology has been widely used in China’s thick seam mining. In order to improve the top-coal recovery ratio of fully mechanized cave mining with large mining height, a study was conducted on optimizing the ...
Lu-Jia Fan, Sheng-Li Yang
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Optimization Studies on Pillar Size of Fully Mechanized Caving Face
Advanced Materials Research, 2014By theoretical calculations, numerical simulation and field monitoring methods to analyze the stress distribution and the extent of damage of coal pillar determine a reasonable size is about 10m, can improve the recovery rate of coal resources, and to ensure the roadway stability. 10m pillar coal resources compared with the previous 20m pillar recovery
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