煤炭与化工2023，Vol.46Issue(12)：94-97,4.DOI:10.19286/j.cnki.cci.2023.12.023
松软煤层水力冲孔增透技术研究与应用
Research and application of hydraulic punching anti-reflection technology in soft coal seam
摘要
Abstract
Aiming at the problem of low permeability and difficult gas control in high gas and soft coal seam,taking No.4 coal seam in Huainan mining area as the engineering background,based on the mechanism of hydraulic punching and pressure relief technology,the effect of pressure relief and permeability improvement after hydraulic punching is investigated by means of theoretical analysis and field test,by comparing and analyzing the extraction concentration,single hole extraction amount,gas pressure,gas content before and after punching,as well as the initial velocity of gas emission and drilling cuttings after punching.The results show that after the implementation of hydraulic punching measures in the outburst coal seam,the dynamic stress around the coal body is unbalanced,a large amount of adsorbed gas is converted into free gas,and the gas extraction concentration of the borehole is improved.After punching,the residual gas pressure of the coal seam is reduced from 2.5 MPa to 0.17 MPa,and the residual gas content is reduced from 8.49 m3/t to 2.05 m3/t,which effectively reduces the risk of coal and gas outburst.关键词
突出煤层/低透气性/水力冲孔/增透技术/瓦斯突出/消突效果Key words
outburst coal seam/low air permeability/hydraulic punching/antireflection technology/gas outburst/elimination effect分类
矿业与冶金引用本文复制引用
赵文武,王云龙,李耀龙..松软煤层水力冲孔增透技术研究与应用[J].煤炭与化工,2023,46(12):94-97,4.基金项目
河北省高等学校科学技术研究资助项目(QN2019231) （QN2019231）
