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Modeling and simulation of strata movement for protective seam mining with large interburden
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作者 SONG Chang-sheng LI De-hai LI Hua-min 《Journal of Coal Science & Engineering(China)》 2009年第1期46-49,共4页
Based on simulated material scale modeling and numerical simulation, the protective seam mining method was conducted at one coal mine. After extracting the No.15seam, the overlying strata movement and the deformation ... Based on simulated material scale modeling and numerical simulation, the protective seam mining method was conducted at one coal mine. After extracting the No.15seam, the overlying strata movement and the deformation of the No.9-10 protected seamwere studied. The experiment results show that it is feasible to destress the protectedseams with large interburden thickness. When the face had advanced 200 m from thesetup room, the No.9-10 seam was fully destressed, resulting in easy gas drainage in thedestressed zone. Recommendations on mining sequence of multiple seams mining in thesame coal areas were made. 展开更多
关键词 large interburden protective seam mining strata movement destressed
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Effect of protective coal seam mining and gas extraction on gas transport in a coal seam 被引量:12
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作者 Yao Banghua Ma Qingqing +2 位作者 Wei Jianping Ma Jianhong Cai Donglin 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第4期637-643,共7页
A gas–solid coupling model involving coal seam deformation,gas diffusion and seepage,gas adsorption and desorption was built to study the gas transport rule under the effect of protective coal seam mining.The researc... A gas–solid coupling model involving coal seam deformation,gas diffusion and seepage,gas adsorption and desorption was built to study the gas transport rule under the effect of protective coal seam mining.The research results indicate:(1) The depressurization effect changes the stress state of an overlying coal seam and causes its permeability to increase,thus gas in the protected coal seam will be desorbed and transported under the effect of a gas pressure gradient,which will cause a decrease in gas pressure.(2) Gas pressure can be further decreased by setting out gas extraction boreholes in the overlying coal seam,which can effectively reduce the coal and gas outburst risk.The research is of important engineering significance for studying the gas transport rule in protected coal seam and providing important reference for controlling coal and gas outbursts in deep mining in China. 展开更多
关键词 protective coal seam mining Seepage characteristic Coal and gas outburst Numerical simulation
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