复杂高应力区掘进工作面冲击地压发生机理与防治技术研究

    Research on The Mechanism and Prevention Technology of Rock Burst in Excavation Face of Complex High Stress Areas

    • 摘要: 复杂高应力区冲击地压高发,并且破坏能量大,对煤矿生产造成极大影响。以赵楼煤矿7303工作面的冲击地压防治为例,通过应力检测、CT反演分析和微震检测等技术对现场进行分析,同时分析了媒体大直径钻孔卸压的效果。通过分析7303初采阶段冲击危险影响因素,建立了复杂高应力采场支承模型,通过计算得7303采空区侧向支承压力影响范围为134 m,应力峰值距离煤壁67 m,峰值应力为78 MPa,并针对性的提出放冲措施。

       

      Abstract: Impact ground pressure in complex high stress area is high and has large destructive energy, which greatly affects coal mine production. Taking the prevention and control of impact ground pressure in 7303 working face of Zhaolou coal mine as an example, we analyzed the site through stress detection, CT inversion analysis and microseismic detection, and meanwhile analyzed the effect of media large-diameter drilling holes in unloading pressure. By analyzing the impact danger influencing factors in the initial mining stage of 7303, a complex high-stress mining support model is established, and the lateral support pressure influencing range of 7303 mining hollow area is calculated to be 134 m, and the peak stress is 67 m away from the coal wall, and the peak stress is 78 MPa, and targeted measures for releasing the impact are put forward.

       

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