Full Depth Freezing Technology of Large Diameter Mine Shaft
WANG Bin
JIANG En-wu
CHENG Zhi-bin
Abstract：A net diameter of a mine auxiliary shaft in Menkeqing Mine was 10m ,the depth of the shaft was 755.45m and the shaft was constructed with full depth freezing method. The freezing depth of the shaft was 768m. The strata passed through by the shaft mainly were Cretaceous and Jurassic soft rock strata. Among the strata ,there were three aquifers. A main borehole+auxiliary borehole pattern meth‐od was applied to the freezing boreholes. A freezing of the mine shaft was officially started on Oct.17 , 2010 based on the refrigeration machine set turned on. On November 27 of the same year ,a freezing ring of the freezing wall was formed. On December 6 ,2010 ,a trial excavation was conducted in the shaft (after 49 days of the refrigeration machine set was turned on).On January 2 ,2012 ,the freezing operation of the shaft was stopped and on January 15 ,2012 ,the mine shaft was safely and successfully reach on the bottom of the mine shaft with the expected effect.
Keywords：large diameter mine shaftfull depth freezingwestern areasoft rock strata
Publication Date：2014-09-18
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 8-10 )