定向长钻孔瓦斯抽采技术在煤巷条带预抽中的应用

为了解决以往条带瓦斯预抽钻孔工程量大、抽采浓度低、抽采时间长的问题，采用定向长钻孔瓦斯抽采技术预抽榆树田煤矿的条带瓦斯，施工了4个定向长钻孔，分析了其在煤巷条带瓦斯预抽中的抽采效果。研究表明：定向长钻孔在榆树田煤矿煤层中单孔长度可达723m，煤层孔段比例高达96%以上|日瓦斯抽采浓度最大为738%，日最大抽采纯量达23017m/d|定向长钻孔瓦斯抽采技术煤层孔段比例高、抽采速度快，能够实现定向条带的区域消突。

Application of Directional Long Bore Gas Extraction Technology in Strip Pre-Extraction

In order to solve the problem of large-scale gas pre-drilling and drilling engineering, low extraction concentration and long extraction time, the directional long-hole gas drainage technology is applied to the strip pre-extraction of Yushutian Coal Mine. The research shows that the length of single hole in the coal seam of Yushutian Coal Mine can reach 723m, the proportion of coal seam hole is as high as 96%~100%; the concentration of daily gas drainage is 73.8%, and the maximum daily extraction volume is 23017 m3/d; Orientation Long Hole Gas Drainage Technology The coal seam has a high proportion of holes and a fast extraction speed, which can achieve the regional elimination measures. This study provides a reference for gas control and gas utilization of mines and adjacent mines.