Abstract: To study stress evolution characteristics of surrounding rock in mining process of close dis- tance coal seams, according to the geological and mining conditions of 762 working face of No.8 coal seam and 962 working face of No.9 coal seam in Haizi coal mine, Huaibei mining group, three-dimensional numerical model was established to study the interaction of surrounding rock stress between the mining operation of 762 and 962 working faces. The results show that floor relief stress of 762 working face exhibits a nearly linear decrease, and forms relief zone in the headgate of 962 working face. The length shortening of 762 working face reduces the distressing effect to 962 working face, and the floor lateral concentration stress of 762 working face and the abutment pressure of 962 working face are superimposed. The pulse numbers of electromagnetic radiation monitored in gateways verifies the mining stress evolution of surrounding rock.

Key words: close distance coal seam, mining-induced stress development, electromagnetic emission