立井工作面预注浆施工  

Pre-Grouting Operation at Mine Shaft Sinking Face

作　　者：王职责 吴新光 

机构地区：[1]湖南涟邵建设工程(集团)有限责任公司,湖南娄底417000

出　　处：《建井技术》2014年第5期16-18,共3页Mine Construction Technology

摘　　要：宝山铅锌矿主井深832m ，净直径4.5m。井深606.1～636.1m段细砂岩含水层，涌水量达100m3／h ，采用工作面预注浆技术堵水加固，注浆段高35m ，在工作面构筑止浆垫，分段下行压入式注浆，注浆终压8M Pa。浆液以单液水泥浆为主；双液浆在注浆结束时，用于封孔。注浆后，该含水层涌水量降到了1.8m3／h ，堵水率达98.2％，取得了良好的效果。A mine main shaft of Baoshan Lead and Zinc Mine had a depth of 832m and a net diameter of 4.5m. At a section of 606. 1 ~ 636.1m of the mine shaft,there was a fine sandstone aquifer and a water flow was 100m3 /h. A pre—grouting technology at the mine shaft sinking face was applied to the water sealing and reinforcement. A grouting section was 35m in height. A concrete plug was built at the mine shaft sinking face. A sectional downward pressurized grouting was applied and the final pressure of the grouting was 8MPa. The grout was a single cement grout mainly and a double grout would be applied to seal the borehole when the grouting operation was terminated. After the grouting conducted,the water flow of the aquifer was reduced to 1.8m3 /h,the water sealing rate was at 98.2% and a excellent effect was obtained.

关 键 词：立井 含水层 工作面预注浆 止浆垫 

分 类 号：TD265.48[矿业工程—矿井建设]