关键词: 深井, 区段煤柱, 冲击地压, 静载荷, 震波CT, 综合防控

Abstract: In order to prevent and control the rockburst problem of gob-side entry with 80 m section coal pillar in 1301 working face, the main influence factors were investigated, seismic wave CT was used to detected the static load of rockburst area for burst hazard assessment, and the prevention measures were formulated and applied. The results show that:(1) the rockburst load source of wide coal pillar was static load composed of the high gravity stress, strong tectonic stress and the lateral abutment pressure of goaf; (2) In-situ evaluation technology of seismic CT based on static load detection showed that the burst hazard indices of wide coal pillar were C=0.5-0.7 and had moderate degree burst hazard; (3) large-diameter borehole pre-relief technology was used to transfer concentrated stress and dissipate elastic strain energy of roadway side, full roadway section was designed to improve the anti-impact ability; reasonable advancing speed was determined to reduce mining disturbance, the comprehensive monitoring-early warning was determined the dynamic burst hazard area and pressure-relief measures. Field application shows good effect.