Taking Jinjia mine as the engineering background, the overlapping mining process of two working face of 11223 and 111811 in the mine coal group was simulated by using FLAC3D software and stress distribution, and the displacement and plastic zone failure pattern of the coal and rock were gotten. Results showed that the stress in three different regions were formed in coal beds after overlapping mining, namely, the stress increasing region of coal pillar, cutting holes and the return air lane, the stress decreasing zone of the central mining goaf, and the original stress zone away from working face. The form and trend of stress nephogram and displacement nephogram were flat trapezoid and the tendency was oblique trapezoid. The trend of plastic zone graph was crest trapezoid and the tendency was dome inclined ladder. The pattern did not change after superposition, but the range increased.