The influence of gas storage parameters on gas emission rate from borehole
Gas emission rate from borehole is one of the most important indexes for the coal and gas outburst prediction. The mathematical model of gas flow in the coal seam, gas flow into the measuring chamber, gas pressure change in the measuring chamber, and gas flow out of the chamber through the pipe is established. Gas migration in the coal seam, gas pressure in borehole chamber and gas flow in pipe is simulated using the finite difference method. Gas emission rate is obtained under dynamic boundary conditions. The influence of gas storage parameters on gas emission rate from borehole is analyzed. Results show that: the gas pressure and the permeability coefficient have great impacts on the value of gas flow quantity in borehole. The larger the original gas pressure of coal seam and the permeability coefficient of coal seam are, the greater the maximum value of gas emission rate form borehole and the later the maximum appears.
borehole gas flow rate gas storage original gas pressure permeability coefficient
GAO Jian-liang SHANG Bin
School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, 4540003,China State Mine 6, Hebi Coal Group Co., Ltd, Hebi, 458000, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
239-245
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）