Abstract: Taking the 3111 comprehensive mechanized working face in Xiadian coal mine as an research object,the movement law of stope overburden and the basic parameters of stope pressure under the condition of hard roof are obtained by simulating on mine pressure regularity of mining face.When the not cut caving of working face advance to 50 m,the destruction scope of whole rocks is small,so,the whole roof is not caving.When the cut caving of working face advance to 30 m,the regional destruction of the intersect of fine sandstone strata and working face throughout the whole of the fine sand layers.The first pressure step distance is about 30 m.The above research results provide the basis for strengthening the management of roof during the working face mining.

Key words: Fully-mechanized caving mining, Mine pressure, Numerical simulation, Roof