掘进工作面动态瓦斯压力分布及涌出规律  

Dynamic distribution of gas pressure and emission around a diving roadway

作　　者：高建良[1] 候三中[1] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454000

出　　处：《煤炭学报》2007年第11期1127-1131,共5页Journal of China Coal Society

基　　金：教育部长江学者和创新团队发展计划资助项目(IRT0618);河南省高校杰出科研人才创新工程资助项目(2004KYCX005);教育部留学回国人员科研启动基金资助项目;河南理工大学博士基金资助项目(B0204)

摘　　要：利用有限差分法对移动掘进工作面巷道周围瓦斯压力分布以及瓦斯涌出规律进行了数值模拟.结果表明:当工作面以一定的速度向前掘进时,巷道周围瓦斯压力分布呈子弹头形状向前移动,掘进巷道周边煤层瓦斯压力随煤壁暴露时间的增长逐渐降低,工作面瓦斯涌出量呈锯齿状周期增加.当掘进工作面以一定速度向前掘进时,每一循环内瓦斯涌出变化量基本相同,每一循环内从工作面迎头煤层内涌出的瓦斯量基本相同.The Finite difference method was applied to simulate the dynamic variation of gas pressure in coal seam around a developing roadway and gas emission rate on the airway surface. Simulation results reveal the dynamic change of the gas pressure and emission rate, The gas pressure distribution advances forward with the advancement of the working face. The gas emission rate from the roadway surface decreases with the elapse of the exposure time of the roadway surface. At the initial stage of the new working face is exposured, the methane emission rate is greatest, then it decreases sharply. The variation amount of methane emision rate in every driving cycle is the same and the variation of methane emission rate from the working surface is the same also.

关 键 词：移动工作面 瓦斯压力 瓦斯涌出量 数值模拟 

分 类 号：TD712.52[矿业工程—矿井通风与安全]