深部高应力区岩爆预测及防治技术研究

Research of prediction and control technology of rockburst in deep and high-stress zone

根据某矿三水平运输下山岩爆发生特点,从岩体的力学性质及诱发因素方面分析了岩爆发生的影响因素,得出该区域岩爆属深部高应力型中等岩爆的结论;提出采用电磁辐射法预测岩爆,通过分析电磁辐射监测值确定了合理的临界指标,并通过现场应用验证了电磁辐射法预测岩爆危险性的可行性;提出了3种爆破卸压方案,采用数值模拟方式优选了延伸辅助眼浅孔爆破卸压方案,并通过现场试验验证了该方案具有良好的岩爆防治效果。

Taking characteristics of rockburst of the third level transport tip in a coal mine into consideration, a conclusion was gotten that rockburst in the zone was highly-stressed medium rockburst in deep district by analyzing influence factors of rockburst from mechanical properties of rocks and precipitating factors. Electromagnetic radiation method was used to predict rockburst and rational critical indexes were determined through analyzing monitored electromagnetic radiation value. Feasibility of the method was verified by field application. Three blasting pressure-release schemes were put forward and a short-hole blasting scheme with extending the secondary hole was chosen by use of numerical simulation. Perfect rockburst prevention and control effect of the scheme was verified by field test.