Analysis and Treatment on Water Inflow f rom Backwall of Mine Shaft Liner in Mine Freezing Shaft
TONG Qiang
YANG Guang-xiang
SUN De-lin
DU Bing-qi
Abstract： A mine ventilation shaft in the east block of Inner Mongolia Changcheng No.1 Mine was sunk with a ground freezing method.After an operation of a freezing machine stopped for one month,during a downward excavation conducted in a mine shaft,a water inflow occurred from a backwall of the mine shaft liner at the freezing section,a max water inflow was 60m3 /h and a safety construction was influenced. According to the analysis on the causes of the water inflow from the backwall of the mine shaft liner,a location of the water flow channel was found. Then a water detection and grouting borehole was drilled in the backwall,a chemical grouting material ——— Marithan E was applied to seal the water flow channel. The water inflow from the backwall was sealed within 5 days only and an ex pected effect was obtained.
Keywords：mine freezing shaftwater inflow from backwallfreezing pipe brokenlongitudinal tempera_ture measurementbackwall grouting
Publication Date：2014-07-28
Pages：4( 8-11 )