APPLICATION OF GAS CURTAIN TO LARGE MINING TUNNEL

The application of the gas curtain to the large section tunnel in 2 # mining field and Longshou Mine of Jinchuan Nonferrous Metals Corporation and Anqing Copper Mine are described The wind door, the blower station, and the wind window are substituted by the multiple gas curtain in the tunnels with large section and pressure differentials, the choking rate is up to 85%～88%, and the blowing rate to the strope is 30～40m 3/s, and the flowage in the tunnel is well adjusted It will be widely used in the underground mining