深部冲击矿井“三位一体”防冲支护体系研究

Research on “trinity” anti-rock burst support system in deep rock burst mine

为了研究矿井中央辅助运输大巷经受周期性冲击地压对支护体系的影响,基于彬长矿区孟村煤矿现有冲击地压防治技术,对巷道围岩变形破坏进行了系统研究。采用理论分析与数值模拟相结合的方法,对巷道围岩变形机理进行了分析评价。结果表明:深部冲击危险区卸压与浅部围岩体加固的综合技术使巷道围岩形成“强-弱-强”的“三位一体”防冲结构,对中央辅助运输大巷的冲击地压可以起到有效缓解与控制巷道围岩作用,研究结果对类似地质条件下矿井冲击地压防治具有重要指导意义。

In order to study the influence of periodic rock burst on the support system of the central auxiliary transportation roadway,based on the existing rock burst prevention technology in Mengcun Coal Mine of Binchang mining area,the deformation and failure of surrounding rock of the roadway were systematically researched.The deformation mechanism of roadway surrounding rock is analyzed and evaluated by combining theoretical analysis with numerical simulation.The results show that the comprehensive technology of pressure relief for deep rock burst danger area and reinforcement for shallow surrounding rock makes the surrounding rock of roadway form a“strong-weak-strong”“trinity”anti-rock burst structure,which can effectively alleviate and control the rock burst of central auxiliary transportation roadway.The research results have important guiding significance for the prevention and control of mine rock burst under similar geological conditions.