采矿与安全工程学报2017，Vol.34Issue(1)：177-184,8.DOI:10.13545/j.cnki.jmse.2017.01.027
高突煤层穿层钻孔“钻-冲-割”耦合卸压技术及应用
"Drilling-flushing-slotting" intercoupling pressure-relief technology of cross-measure boreholes and its application in high gassy outburst coal seam
摘要
Abstract
In order to enhance gas extraction effect of cross-measure boreholes in highly gassy outburst coal seam,in view of the limitations of single hydraulic pressure-relief and transparency technology,and combining the technological advantages of hydraulic flushing and hydraulic slotting,"Drill-ing-Flushing-Slotting" intercoupling pressure-relief technology of cross-measure boreholes was pro-posed.Its intercoupling pressure-relief mechanism was studied through numerical methods and field application was carried out in a colliery.Research results have shown that after "Drilling-Flushing-Slotting" intercoupling pressure-relief,surrounding coals were disturbed intensively and pressure-relief area,plastic zone and gas flow channels increased.Results of field application have shown that the number and the length of cross-measure boreholes within per unit length of coal roadway decreased by 32.5％ and 42.9％ respectively,and the speed of driving increased to above 100 m per month.关键词
高突煤层/穿层钻孔/“钻-冲-割”/卸压/瓦斯抽采Key words
highly gassy outburst coal seam/cross-measure borehole/drilling-flushing-slotting/pressure-relief/gas extraction分类
矿业与冶金引用本文复制引用
高亚斌,林柏泉,杨威,李贺,李子文..高突煤层穿层钻孔“钻-冲-割”耦合卸压技术及应用[J].采矿与安全工程学报,2017,34(1):177-184,8.基金项目
国家重点基础研究发展计划(973)项目(2011CB201205) （973）
国家自然科学基金项目(51074161) （51074161）
国家科技支撑计划项目(2012BAK04B07) （2012BAK04B07）
