face advance
1.FIRE NREVENTION AND EXTLNGUISH TECHNIQUES WITH AIR REGULATION BY ADDITION OF PRESSURE AND ADVANCE OUFFLOW IN FULLY MECHANIZED MINING FACE
6.Aiming at the abnormal strata behavior in the advance entry of 1303 fully-mechanized working face in Xinglongzhuang coal mine, the movement rule, characteristic, step distance of fracturing, position and mode of fracturing of the overlying strata in mining process is analyzed by using the key strata theory.

