地面水文孔井下封堵技术

Stemming Technology Under Well in Ground Hydrogeological Holes

对地面难以封堵的水文孔采取在井下封堵的方案,通过封孔与堵源相结合,在钻孔设计上对水文孔周围含水层形成立体交叉网,采用地面与井下注浆系统相结合的办法,对水文孔附近的含水层彻底注浆,从而切断水文孔外围含水层与其之间的水力联系,达到治理钻孔水害的目的。

According to the difficult stemming hydrogeological holes, the authors have introduced the application of stemming under well to grout fully in water--bearing bed nearby hydrogeological holes, and to cut off hydraulic connection between the inside and outside of water--bearing bed, which achieves comprehensive prevention of water disasters during drilling holes.