Computer Simulation of Gas Pressure and Drainage Radius for Dense Boreholes Gas Pre-drainage in Outburst Coal Seam

摘要：

The computer simulation technique has been widely applied to the mine disaster control field. In this paper, we discuss the use of dense borehole pre-drainage technology as a preventive measure for coal and gas outburst. In order to enhance the pre-drainage efficiency and rationally arrange the borehole, the solid-gas coupled RFPA2D-Gas software is used to study the variation regularity in gas pressure and drainage radius under different conditions. These include the coal seam permeability coefficient, the space between boreholes, the borehole diameter, the gas content coefficient and the predrainage time. In conclusion, if a large permeability coefficient, a large borehole diameter, a small space between boreholes and a small content coefficient are used in the coal seam, then the reduction in gas pressure and drainage radius will be large. In this case, the shortest pre-drainage time is required in order to avoid the outburst danger in the coal seam. If the pre-drainage time is extended, both gas pressure reduction and drainage radius increase.

关键词： computer simulation outburst coal seam dense boreholes gas pre-drainage gas pressure drainage radius RFPA2D-Gas software

作者: YI Li-jun TANG Zhi-ling YU Qi-xiang

作者单位: College of Resource and Metallurgy Guangxi University Nanning, P.R.China College of Computer Science and Electronic Information Guangxi University Nanning, P.R.China College of Safety Engineering China University of Mining and Technology Xuzhou, P.R.China

会议类型: 国际会议

会议名称: 第四届国际计算机新科技与教育学术会议(2009 4th International Conference on Computer Science & Education)

会议地点: 南京

会议语种:英文

页码: 1174-1180

在线出版日期: 2009-07-25（万方平台首次上网日期，不代表论文的发表时间）