煤矿安全2017，Vol.48Issue(5)：5-8,4.DOI:10.13347/j.cnki.mkaq.2017.05.002
工作面前方承压抽采钻孔瓦斯渗透规律及其层理效应研究
Study on Gas Seepage Laws and Bedding Effect for Pressure-bearing Drainage Boreholes in Front of the Working Face
摘要
Abstract
Three gas extraction drilling holes of different angles with coal seam bedding direction were arrangemented in Xin'an Coal Mine of Yima Coal Group,the gas drainage concentration,gas flow and total pure drainage volume were investigated to uncover the gas seepage laws of drill holes under different pressure-bearing conditions in the process of working face advancing.Numerical model was set up to simulate the gas permeability of three extraction boreholes respectively,the simulation results are relatively similar with field investigation.The results show that the best gas extraction area is from 7 m to 11 m before the working face,the arrangement of boreholes parallel to the bedding of coal seam could make the gas drainage work best,the reasonable area for gas extraction equipment dismantling is 4 m to 6 m before the working face.关键词
承压状态/抽采钻孔/瓦斯纯量/渗透特性/层理效应Key words
pressure-bearing condition/gas extraction borehole/pure gas amount/permeability characteristic/bedding effect分类
矿业与冶金引用本文复制引用
田坤云,付江伟..工作面前方承压抽采钻孔瓦斯渗透规律及其层理效应研究[J].煤矿安全,2017,48(5):5-8,4.基金项目
国家自然科学基金资助项目(51604091,51604311) （51604091,51604311）
河南工程学院博士基金资助项目(D2015025) （D2015025）
