摘要
为解决石港煤业15号煤层回采工作面瓦斯浓度严重超标的问题,拟在15405回采工作面使用地面L型钻孔抽采采空区瓦斯。为了验证采用该抽采工艺的合理性并确定L型钻孔的最优布置参数,采用COMSOL模拟软件建立三维裂隙场模型,分析采空区瓦斯运移和富集规律,结果表明:L型高位钻孔水平段的合理终孔范围为:垂直方向上距煤层顶板19~29 m,水平方向上距回风巷上帮13~23 m,L型抽采钻孔可有效将上隅角瓦斯体积分数降至1%以下,预计可解决工作面瓦斯的控制问题。
In order to solve the serious problem of excessive gas concentration in the 15# coal seam mining face of Shigang coal industry,it is proposed to use L-shaped surface borehole to extract goaf gas in the 15405 mining face.In order to verify the rationality of the extraction process and determine the optimal layout parameters of L-shaped drilling,COMSOL simulation software was used to establish a three-dimensional fracture field model and analyze the law of gas migration and accumulation in gob.The results show that the reasonable final hole range of the horizontal section of L-shaped high level drilling is as follows:The gas concentration in the upper corner can be reduced to less than 1% by L-type extraction drilling hole,which is 19~29 m away from the coal seam roof in the vertical direction and 13~23 m away from the upper side of the return air roadway in the horizontal direction.It is expected to solve the problem of gas control in the working face.
作者
王保功
WANG Baogong(Shanxi Shigang Mining Industry Co.,Ltd.,Zuoquan 032600,China)
出处
《煤》
2025年第4期18-21,26,共5页
Coal
关键词
高瓦斯
L型钻孔
数值模拟
high gas
L-shaped drilling
numerical simulation
作者简介
王保功(1981-),男,河南沈丘人,工程师,从事“一通三防”管理技术工作,E-mail:kylwzx@163.com。
