摘要
为解决煤层渗透性低这一制约瓦斯抽采技术发展的瓶颈,进行了采动影响下煤层瓦斯渗透率示踪试验,获得了采动煤层瓦斯渗透率演化规律。基于应力-渗流耦合效应,采用数值试验方法,探讨了钻孔布置位置对瓦斯抽采效果的影响。结果表明:钻孔布置于渗透率较高区域,瓦斯压力降低幅度相对较大,抽采效果较好;距离工作面小于5 m为最佳钻孔拆除时间,有利于改善工作面安全状态。
The low permeability of coal is the bottleneck of gas extraction technology.The permeability tracer test of mining coal seam was done to solve this bottleneck,the evolution law of permeability was obtained.Based on the coupling effect of stress and seepage,the numerical experiment method was used to analysis the drill hole layout how to influent the gas drainage effect.The results show that gas drill hole locate at the high permeability area,the gas pressure decrease large range relatively and gain the better extraction.The drill hole is removed when the length is less than 5 m from the working face.It is conducive to improving the safety of the working face.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第3期406-410,共5页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)基金资助项目(2005CB221503)
