摘要
结合《防治煤与瓦斯突出规定》与《煤矿安全规程》消突指标的规定,把抽采影响范围内煤层残余瓦斯压力小于0.74MPa且抽采率大于30%作为标准确定有效抽采半径,建立了基于钻孔瓦斯流量和瓦斯压力的有效抽采半径计算公式。根据62110工作面的瓦斯地质条件,进行了有效抽采半径的计算,并采用COMSOL Multiphysics对有效抽采半径进行了模拟。结果表明:预抽时间60d时有效抽采半径约2.5m,与基于钻孔瓦斯流量和瓦斯压力计算的有效抽采半径基本一致。
Combined with regulation of outburst elimination indication of ＂Regulation of Control Coal and Gas Outburst＂ and ＂Coal Mine Safety Regulation＂ ,effective drainage radius of residual gas pressure smaller than O. 74 MPa within the scope of coal extraction impact and pre--pumping rate greater than 30% has been determined and the formula of effective drainage radius has been established based on the borehole gas flow and gas pres-- sure. The effective drainage radius has been calculated and simulated by using COMSOL Multiphysics according to the gas geological conditions of 62110 face. The results shows that the effective drainage radius is about 2.5 m when the pre--pumping time is 60 day, whose result is basically the same with the radius calculated based on borehole gas flow and gas pressure
出处
《江西煤炭科技》
2014年第3期1-3,共3页
Jiangxi Coal Science & Technology
关键词
有效抽采半径
瓦斯压力
瓦斯流量
消突
effective drainage radius
gas pressure
gas flow
outburst elimination
