玉溪煤矿煤巷掘进工作面增透瓦斯抽采技术研究与应用

Research and Application of Gas Drainage Technology for Increasing Permeability of Roadway Driving Face in Yuxi Coal Mine

为实现1302运输顺槽掘进工作面瓦斯的高效抽采,通过分析水力冲孔造穴增透技术原理、工艺流程,结合工作面的具体地质条件,设计水力冲孔造穴水压为18 MPa,造穴循环距离为100 m,每循环内划分为4个区域,进行变间距造穴方案设计,基于煤层瓦斯含量特征,进行掘进工作面顺层钻孔抽采设计,并在水力冲孔造穴方案实施前后分别进行抽采效果监测分析。结果表明:增透抽采技术实施后,抽采效率显著提升,且抽采方案实施后煤层残余瓦斯含量和钻屑解吸指标均满足规范要求。

In order to realize the high-efficiency gas drainage of the 1302 transport along the tunneling face,the hydraulic punching hole-making hole-making hydraulic pressure is designed to be 18MPa through the analysis of the principle and technological process of hydraulic punching hole-making and anti-reflection technology,combined with the specific geological conditions of the tunneling face.The cavitation cycle distance is 100m,and each cycle is divided into 4 areas.The variable spacing cavitation scheme design is carried out.Based on the characteristics of coal seam gas content,the bedding drilling and drainage design of the driving face is carried out,and the cavitation scheme is hydraulically punched.Perform monitoring and analysis of drainage effects before and after implementation.The results show that after the implementation of the enhanced drainage technology,the drainage efficiency has been significantly improved,and the residual gas content of the coal seam and the drilling cuttings desorption index after the implementation of the drainage plan meet the requirements of the specification.