【摘要】 针对华丰煤矿开采深度达1150m的4号煤层具有强冲击倾向性、直接顶具有中等冲击倾向性,工作面开采过程中面临严重的冲击地压威胁等问题,为了防止开采期间冲击地压的发生,对准备工作面实施区域卸压,开采上下解放层,施工直径108mm、深度30m、孔间距2.5m的煤层大直径卸压钻孔等措施,当准备工作面煤层应力降低30%～50%后,再在工作面回采过程中通过微震监测、矿震监测、地音监测、应力监测和钻屑法监测等技术进行监测。实践证明,对准备工作面实施区域卸压和冲击地压监测技术,可有效防止破坏性冲击地压的发生。更多还原

【Abstract】 According to the mining depth of No.4 seam in Huafeng Mine was over 1 150 m and the seam with the high bumping tendency and the immediate roof with medium pressure bumping tendency,the coal mining face would face a serious rock burst danger and other problems during the mining process.In order to prevent the rock burst occurred in the mining period,a regional pressure releasing,mining in the upper and lower liberated seams,constructed large diameter pressure releasing borehole with diameter of 108 mm,depth of 30 m and space of 2.5 m between boreholes and other measures conducted for the standby coal mining face.When the stress of the standby coal mining area was reduced by 30%~50%,the micro seismic monitoring and measuring,mine seismic monitoring and measuring,ground sound monitoring and measuring,stress monitoring and measuring,drilling cuttings monitoring and measuring and other technology were applied to monitor and measuring the coal mining face during the mining process.The practices showed that the regional pressure releasing and the rock burst monitoring and measuring technology conducted in the standby coal mining face could effectively prevent the destructive rock burst occurred.更多还原