摘要
针对高瓦斯矿井回风巷上隅角悬顶面积过大容易造成瓦斯超限的难题,进行水力压裂控制坚硬顶板回风巷上隅角悬顶面积的井下试验。通过在巷道内布置H型钻孔,并将钻孔间距缩至控制半径的一半,同时采取相邻钻孔错位压裂的措施,结果证明工作面两巷上隅角悬顶面积控制在要求的范围之内,并且对巷道没有产生额外的破坏作用。
In order to solve the difficult problem of methane overrunning for large hanging roof area at the upper corner in high methane mine, hydro-fracturing was applied to controlling hanging roof area. H-style boreholes were arranged in roadway, space between bore-holes was reduced to half of the controlling diameter, and misalignment hydro-fracturing at adjacent borehole was applied. Practice showed that the area of hanging roof was controlled within requirement without extra failure action.
出处
《煤矿开采》
北大核心
2015年第5期70-73,共4页
Coal Mining Technology
基金
国家自然科学基金委员会与神华集团有限责任公司联合资助项目(U1261211)
中国煤炭科工集团科技创新基金面上项目(2013MS010)
天地科技股份有限公司科技创新基金项目(KJ-2014-TDKC-01)
关键词
水力压裂
上隅角
悬顶面积
hydro-fracturing
upper corner
hanging roof area
