关键词: 双煤柱, 数值模拟, 冲击危险性, 矿震, 矿压显现, 岩层移动

Abstract: Due to the existence of double panel-pillar between 3-1103 working face and 3-1101 working face in Hongqinghe coal mine, the new auxiliary transportation roadway of 3-1103 working face is faced with high burst hazard, which poses a threat to safe production. Numerical simulation and statistics are carried out to investigate the mine pressure features of double panel-pillar area and the active control of burst hazard. Simulation results show that: (1) Panel-pillar area is of high stress concentration with 1# pillar and 2# pillar posing a threat to the abandoned old auxiliary roadway and the new auxiliary roadway respectively; (2) With the increase of 2# pillar, the stress in 1# pillar, 2# pillar and beside the new auxiliary transportation roadway decreases; The stress in coal mass beside the new auxiliary transportation roadway decreases faster than that beside the old auxiliary transportation roadway; (3) Seismic events induced by 3-1103 working face mainly accumulated in the pillar area; The seismic events with energy more than 104J were mainly 214 m in front of working face and within 35 m on average away from the pillar.