动载扰动下矿井巷道围岩冲击地压防控技术

    Technology for controlling rock burst in mine roadway surrounding rock under dynamic load disturbance

    • 摘要: 为了解决深部开采过程中动载扰动引发的巷道围岩冲击地压问题,保障深部矿井高效安全开采,本文提出动载扰动下矿井巷道围岩冲击地压防控技术。通过构建动静载荷叠加的能量判据模型以揭示冲击起动机制;提出考虑顶底板约束的煤岩组合冲击能速度指数,建立多指标综合评价体系;设计“强韧-让压-吸能”一体化的多级让压防冲支护体系,形成“疏导”与“抵抗”并重的围岩控制技术。通过实例应用分析表明,该技术体系可有效辨识冲击危险等级,巷道围岩变形得到显著抑制,支护系统损坏率大幅降低,微震事件频次减少。此防控技术能保障支护系统完整性,实现巷道在高动载扰动下的长期稳定可控,为深部矿井开采提供有力技术支撑。

       

      Abstract: To address the issue of rock burst in mine roadways caused by dynamic load disturbances during deep mining and ensure efficient and safe mining in deep mines, this paper proposes a control technology for rock burst in mine roadways under dynamic load disturbances. By establishing an energy criterion model for the superposition of dynamic and static loads to unveil the rock burst initiation mechanism.; Propose the impact energy velocity index of coal-rock combination considering the constraints of top and bottom plates, and establish a multi-index comprehensive evaluation system. Design a multi-level pressure-reducing and anti-erosion support system integrating "strength and toughness - pressure-reducing and energy absorption", forming a surrounding rock control technology that emphasizes both "guidance" and "resistance". Practical application and analysis show that, the deformation of the surrounding rock of the roadway has been significantly suppressed, the damage rate of the support system has been greatly reduced, and the frequency of microseismic events has decreased. This prevention and control technology can ensure the integrity of the support system, achieve long-term stability and controllability of the roadway under high dynamic load disturbances, and provide strong technical support for deep mine exploitation.

       

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