Pre-Grouting Operation at Mine Shaft Sinking Face
WANG Zhi-ze
WU Xin-guang
Abstract：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.
Keywords：mine shaftaquiferpre-grouting at sinking faceconcrete plug
Publication Date：2014-07-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 16-18 )