基于主动预裂的煤矿冲击地压超前控制工艺研究

Research on Advanced Control Technology of Coal Mine Rock Burst Based on Active Presplitting

  • 摘要: 针对彬县水帘洞煤矿高瓦斯与弱冲击地压耦合条件下煤体结构完整、应力集中引发的冲击地压防控难题,构建主动预裂超前干预控制工艺,优化设计水力压裂与爆破预裂协同参数并开展现场工业试验。通过微震监测、顶板位移观测、支护应力监测等多维度数据定量对比分析。结果显示:预裂区域高能微震频次下降62.8%,累计冲击能量释放减少65.8%;顶板下沉速率、巷帮收敛速率分别降低56.6%、57.1%,支架工作阻力波动幅度减小55.8%。研究表明,该主动预裂工艺可有效调控冲击能量释放,为高瓦斯与弱冲击地压耦合矿井的冲击地压预控设计提供了可靠技术支撑。

     

    Abstract: In view of the difficult problem of rock burst prevention and control caused by intact coal body structure and stress concentration under the coupling condition of high gas and weak rock burst in Binxian Shuiliandong Coal Mine, an active presplitting advanced intervention control technology is constructed, hydraulic fracturing and blasting presplitting collaborative parameters are optimized and designed, and on-site industrial tests are carried out. Through quantitative comparative analysis of multi-dimensional data such as microseismic monitoring, roof displacement observation, support stress monitoring and others, the results indicate that the frequency of high-energy microseismic events in the presplitting area is decreased by 62.8%, and the cumulative impact energy release is reduced by 65.8%; The roof subsidence speed and the convergence speed of the roadway side are decreased by 56.6% and 57.1% respectively, and the fluctuation amplitude of the bracket working resistance is decreased by 55.8%. The research shows that this active presplitting technology can effectively regulate and control the release of impact energy, and provides a reliable technical support for the pre control design of rock burst in high gas and weak rock burst coupled mines.

     

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