强采动碎裂巷道围岩破坏机理与控制对策

    Failure Mechanism and Control Measures of Cracked Roadway with Severe Mining

    • 摘要: 为解决双巷布置形式回采巷道将经受多次采动影响进而诱发围岩碎裂变形失稳的难题,以东梁煤业3101工作面辅助运输巷为工程背景,综合运用现场实测、钻孔窥视、数值模拟及工程实践等多种研究方法对试验巷道围岩变形破坏机理与控制技术进行了系统研究。研究表明:多次采动影响及围岩控制方案缺乏针对性是造成巷道围岩破坏的直接诱因。因此,提出以“三高”支护理念(高强全断面锚网+高强加长锚杆+高预应力强力锚索)为基础的围岩强化控制对策,并经现场工程实践验证可行,确保了强采动巷道围岩在采掘全过程中的安全稳定性。

       

      Abstract: In order to solve the deformation and instability problem of surrounding rock caused by multiple severe mining dynamic load of double roadway layout, taking No.3101 working face auxiliary transportation roadway of Dongliang Coal Industry as engineering background, the deformation and failure mechanism and control technology of the surrounding rock of the test roadway were systematically studied by using a variety of research methods including field measurement, drilling and peeping, numerical simulation and engineering practice. It is shown that the direct cause of roadway surrounding rock damage is the effect of multiple mining and lack of pertinence of surrounding rock control scheme. Therefore, the reinforcement control measures for surrounding rock based on the support concept of “three-height” (high-strength full-section anchor network + high-strength extension anchor rod + high-prestress strong anchor cable) is proposed. The feasibility is verified by field engineering practice, which ensures the safety and stability of surrounding rock in the whole process of mining.

       

    /

    返回文章
    返回