摘要
利用工作面高抽巷施工掩护顺槽掘进工作面下向穿层条带预抽钻孔,通过对钻场底板深、浅孔注浆封堵围岩裂隙解决了孔内返水不畅难题;采取了"两堵一注"封孔方式确保封孔严密不漏气;孔内全程下吹水管,实现了单孔、分组、定时吹水工作目标,提高了下向消突钻孔抽采效果,形成了一套高效、快速的下向穿层钻孔消突管理模式,实现了高地压严重突出区域煤层高效消突以及技术经济一体化目标,安全经济效益显著。
The high-drainage roadway construction face of the working face is used to pre-drill the borehole under the tunneling face, and the problem of poor water return in the hole is solved by grouting the surrounding rock cracks in the deep and shallow holes of the drill floor. The "two plugs and one note" sealing method was adopted to ensure that the sealing holes were tight and airtight;the water pipes were blown all the way in the hole, and the single hole, grouping and timed water blowing work targets were realized, and the drilling effect of the downhole drilling was improved. A set of efficient and rapid down-drilling and hole-dissipation management mode has been formed, which has achieved the goal of high-efficiency outburst of coal seams and technical and economic integration in areas with high ground pressure and serious safety and economic benefits.
作者
柏发松
王永保
苏朝晖
甘成
BAI Fa-song;WANG Yong-bao;SU Zhao-hui;GAN Cheng(Dingji Coal Mine,Huaihu Coal-electicity Limited Company,Huainan 232141,China)
出处
《煤炭技术》
CAS
2020年第1期125-127,共3页
Coal Technology
关键词
高地压
突出煤层
下向穿层钻孔
高效消突
high ground stress
outburst coal seam
downhole drilling
efficient elimination
