Numerical Analysis of Coal-gas Flow on the Mining Method of Extreme Short-range Protective Strata
The safety in coal mining was threatened by the potential of the coal-gas outburst. The coal-gas existing condition was ameliorated in the coal seams prone to coal-gas outburst adopting the mining method of protective strata. The gas volume and the gas pressure were reduced synchronously in the protected coal seam, and the coal seam of high permeability prone to the coal-gas outburst was changed into that of low permeability with no proneness to the coal-gas outburst. The D15 coal seam was treated as the protective strata, and the D16-17 coal seam was treated as the protected strata in the Fifth coal mine in the Pingdingshan Coal Mining Group. The distance between the two coal seams was 5 meters averagely, clarified into the extreme short-range protective strata. The numerical analysis was based on the theory of the porous media flow with the finite element method. The gas flow process and the change mechanism of the coal-gas pressure were analyzed in the process of mining the protective strata.
extreme short-range protective strata the porous media mining procedure coal-gas flow coal-gas pressure
LEI Wenjie SU Guoshao
School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China Department of Civil and Architecture Engineering, Guangxi University, Nanning 530004, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
1497-1502
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）