关键词: 非连续卸压, 冲击地压, 宽煤柱, 防治技术

Abstract: In response to the issue of impact disasters induced by discontinuous unloading of wide coal pillars in Sandunzi Coal Mine, through on-site measurement and theoretical analysis, the pressure characteristics, coal pillar stress distribution characteristics, and microseismic activity characteristics of the unloading and non unloading areas were studied. An analysis model of impact induced by discontinuous unloading of wide coal pillars was established, revealing the mechanism of rock burst induced by discontinuous unloading of wide coal pillars. Based on this, the prevention and control methods for rock burst of wide coal pillars were explored, The research results indicate that under the action of the overlying lateral roof and advanced support pressure, the stress concentration area will transfer towards the middle of the un unloaded coal body, which is prone to unstable instability. The dynamic load disturbance caused by the sudden rupture of the complete roof rock layer is also the main reason for the impact of the wide coal pillar. Finally, it is proposed that the combined anti erosion method of continuous pressure relief of wide coal pillars and weakening of thick and hard rock layers can help prevent and control rock burst induced by wide coal pillars. The research results will provide technical support for the prevention and control of induced impact disasters in wide coal pillars in China's coal mines.