Abstract：As the exploit strength increasing，rock-burst may occur under the condition of non-hard roof. Aiming at mining conditions of high seam with fully mechanized sublevel caving mining and higher fully mechanized mining，based on the mechanics system of roof，coal and floor，and using the method of numerical simulation，the effects of time-space evolvement of mining pressure field on pressure，distortion，and destruct of mining space，mutual effect between far pressure and near pressure，and inducing conditions of rock-burst are discussed. Time-space evolvement law of collapse of coal seam and terranes and the mining pressure field are also presented. The mechanism of rock-burst and gas disaster induced by high strength exploit has been opened out.
