动力扰动诱发煤层大巷冲击地压机理及其防控技术

为了提高深部矿井煤层大巷冲击地压动力灾害防控效果,基于高家堡煤矿冲击地压灾害发生特点与工程地质条件,通过动静载组合控制煤岩动态破坏的普适性理论方法进行探究,揭示了高家堡煤矿煤层大巷冲击地压致灾机理,明确了动静载复合应力场动力灾害防控途径.在此基础上,考虑煤层大巷服务年限长、 围岩应力集中程度高等特点,结合动力扰动诱发大...

Mechanism and Prevention of Coal burst in Deep Shaft Main Roadway subjected to the dynamic disturbance

In order to improve the prevention and control effect of rockburst dynamic disasters in deep shaft coal roadways, based on the occurrence characteristics of rockburst disasters and engineering geological conditions in Gaojiabao Coal Mine of Zhengtong Coal Industry in Shaanxi, the universal theory of dynamic and static coal damage control through the combination of dynamic and static loads The method of exploration reveals the disaster mechanism of coal roadway pressure burst in Gaojiabao coal mine, and clarifies the prevention and control method of dynamic disaster caused by combined dynamic and static load stress field. On this basis, considering the characteristics of long service life of coal seam roadways and high degree of stress concentration in surrounding rocks, combined with the impact failure mechanism of the roadway induced by dynamic disturbance, a targeted combination of "blasting loosening + surrounding rock grouting" is proposed to control surrounding rock disasters. , And verified through the comprehensive research method of numerical simulation and field test. The research results show that the scientific prevention and control of rock burst dynamic disasters in deep shaft coal seam roadways aims to increase the attenuation of dynamic stress waves and reduce the stress concentration of surrounding rocks; and the realization of "blasting-grouting" joint control technology has both the above effects , In the field engineering practice, the prevention and control effect is good, and it can be used as one of the effective ways to prevent and control the rock burst disaster in the deep shaft coal seam roadway.