基于冲击启动理论的深孔区间爆破疏压技术

 通过分析巷道冲击地压启动机制，采用数值模拟方法研究巷帮集中应力分布的爆破效应，提出基于冲击启动理论的深孔区间爆破疏压方法。研究表明：巷帮深孔爆破的区间应为冲击启动区，否则将起到负面作用；加大巷帮煤壁支护强度以疏、降集中应力是有限的；深孔区间爆破疏压方法，一方面疏、降冲击启动区应力或能量集中程度，阻止冲击启动环节发生，另一方面迫使率先冲击启动的区域向煤壁深部迁移，并增加疏压区消耗冲击地压启动后的总能量，降低能量释放速度。研究结果在现场取得较好的应用效果。

DREDGING TECHNOLOGY OF PRESSURE WITH DEEP-HOLE INTERVAL BLASTING BASED ON THEORY OF ROCK BURST START-UP

By analyzing the mechanism of rock burst start-up,the blasting effect of the concentrated stress distribution in the roadway is studied by numerical simulation methods;and the dredging method of pressure with deep-hole interval blasting based on theory of rock burst start-up is proposed.The research results show that:(1) The interval of deep-hole blasting in roadway should be the area of rock burst start-up,otherwise it will play a negative role.(2) It is limited to dredge and debase concentrated stress by increasing intension of roadway support.(3) On one hand,the dredging method of pressure with deep-hole interval blasting can dredge and debase the degree of concentrated stress or energy of the area of rock burst start-up,thus the rock burst start-up step can be prevented.On other hand,it let the area of rock burst start-up firstly move to the deep coal wall;and the total energy which is consumed by rock burst start-up in dredging pressure area increases,but the energy release speed reduces.The good effect of application the research results to field engineering is got.