大直径冻结井筒单层井壁注浆堵水技术研究

Large Diameter Freeze Shaft Single Wellbore Grouting Plugging Technology Research

为研究大直径冻结井筒单层井壁注浆堵水技术,针对门克庆矿副立井开始解冻后井筒漏水量较大的问题,结合井筒的技术特征、水文地质情况和井壁参数,对井筒壁后、隔水帷幕及井壁微裂纹采取分阶段、分重点进行注浆堵水。结果表明:井筒漏水量由233 m3/h降低为4.5 m3/h,达到井筒漏水量规范要求。

To study the freezing of large diameter single wellbore wall grouting technology for large amount of leakage problems wellbore door grams celebrate mine shaft began to thaw vice combining technical features wellbore wall hydrogeologieal conditions and parameters of the wellbore after the walls, curtains and wall impermeable microcraeks take phased ,focused carried grouting. The results show that： the amount of leakage from the wellbore 233 m3/h reduced to 4.5 m3/h, reaching the amount of wellbore leakage specifications.