黔西县龙场煤矿南回风井井筒地面预注浆工程得失探讨

ON DISADVANTAGES AND ADVANTAGES IN THE PRE-GROUTING ENGINEERING OF THE SOUTHERN RETURN AIR SHAFT AT LONGCHANG COALMINE,QIANXI

该井采用立井开拓方式,设计直径5.5m,掘深268m。抽水试验预计断层破碎带涌水量37m3/h,经预注浆处理,井筒涌水量仍达10m3/h。分析该井注浆设计、施工中的得失,以指导类似工程。

The shaft is a vertical one with a design diameter of 5.5 m and a depth of 268 m. It was pre-grouted due to the experimental water outflow estimate of 37 m3 per hour. But the water flow was still at 10 m3 per hour after the grouting. We analyzed the gains and los- ses of the grouting design and construction to guide future simil^Lr engineering.