Based on the analysis of Wugou coalmine geology and hydrogeology, numerical simul-ation model is established. The 1031 working face of mining height is numerical simulated by mea-ns of the FLAC3D software. The stress and strain evolution characteristics of roof strata were obtained. Different ways are adopted to predict the biggest growth altitude of "two belts"in workin-g face’s different mining regions.The reasonable design of waterproof coal pillar in the lower aqui-fer is determined and safety regulation and technical measures are developed. All of these can lib-erate coal resources of more than 20 million t and have important application value for the lower a-quifer mining safety.
