缓倾斜高瓦斯煤层工作面高位定向长钻孔瓦斯抽采技术研究  

Study on Gas Drainage Technology of High Level Directional Long Borehole in Gently Inclined High Gas Coal Seam

作　　者：霍小泉 袁增云 彭勇 HUO Xiao-quan;YUAN Zeng-yun;PENG Yong(Xiashijie Coal Mine,Shanmei Shaanxi Tongchuan Coal Mining Co.,Ltd.,Tongchuan 727000,China;Beijing Yoland Mining Technology Development Co.,Ltd.,Beijing 102488,China)

机构地区：[1]陕西陕煤铜川矿业有限公司下石节煤矿,陕西铜川727000 [2]北京优蓝新能矿业技术发展有限公司,北京102488

出　　处：《煤炭技术》2021年第11期136-141,共6页Coal Technology

摘　　要：为解决下石节煤矿缓倾斜工作面采空区和上隅角瓦斯超限问题,提出了用高位定向长钻孔代替高位抽采巷进行瓦斯抽采的方法,首先通过FLAC3D数值模拟软件分析获得了下石节矿覆岩三带分布规律,并以此为依据选择层位布置钻孔,在下石节煤矿2305综采工作面施工高位定向长钻孔对工作面涌出的瓦斯进行抽采,并在抽采期间持续观测分析抽采效果。通过分析获得的钻孔在垂向及倾向上瓦斯浓度及抽采纯量的部分规律,提出了缓倾斜工作面高位定向长钻孔瓦斯抽采的布孔优化方案,预期研究结果对于缓倾斜工作面以高位定向长钻孔瓦斯抽采技术研究具有重要意义。In order to solve the problem of gas overrun in goaf and upper corner of gently inclined working face in Xiashijie coal mine,puts forward the method of gas drainage by using high-level directional long borehole instead of high level gas drainage lane.Firstly,the distribution law of overburden three zones in Xiashijie coal mine is obtained by FLAC3D numerical simulation software,and he position of layer of borehole is selected,the gas drainage is carried out in panel 2305 of Xiashijie.The gas emitted from the working face is extracted by high position directional long borehole.And the gas drainage effect is continuously observed and analyzed during the extraction period.Based on the analysis of some laws of gas concentration and drainage purity in vertical and inclined direction of boreholes,the optimization scheme of gas drainage with high directional long boreholes in gently inclined working face is put forward.The expected research results are of great significance for the study of gas drainage technology with high directional long boreholes in gently inclined working face.

关 键 词：数值模拟 高位定向长钻孔 高位巷 瓦斯抽采 

分 类 号：TD712.6[矿业工程—矿井通风与安全]