巷道交叉点围岩变形规律因素及调控研究

    Research on the factors and regulation of surrounding rock deformation at tunnel intersections

    • 摘要: 为有效控制五阳煤矿8002回风巷与80采区专用回风巷交叉点处出现的围岩严重变形问题,采用现场观测、数值模拟与现场工业性试验相结合的综合分析方法,系统探究该交叉点的变形规律因素,并提出针对性的调控技术。研究发现交叉点围岩变形的主要诱因包括:巷道埋深较大导致的高地应力作用明显,交叉区域顶板结构稳定性不足,以及围岩岩性软弱、整体力学性能较差。针对该交叉点顶板破碎的情况提出“顶板锚索补强协同注浆加固”的联合支护方案。结合现场工业性试验结果表明,实施该方案后,巷道顶底板最大移进量为352 mm,两帮最大移进量为150 mm,有效控制围岩变形,保障巷道的安全稳定使用。

       

      Abstract: To effectively control the severe deformation of the surrounding rock at the intersection of the 8002 return tunnel and the dedicated return tunnel of the 80 mining area in Wuyang Coal Mine, a comprehensive analysis method combining field observation, numerical simulation, and on-site industrial tests is adopted. This approach systematically explores the deformation patterns and factors at the intersection and proposes targeted control techniques. The study finds that the main causes of surrounding rock deformation at the intersection include: significant high ground stress due to the deep burial of the tunnel, insufficient stability of the roof structure in the intersection area, and weak surrounding rock with poor overall mechanical properties. In response to the fractured roof at this intersection, a combined support scheme of “roof anchor reinforcement coordinated with grouting stabilization” is proposed. The results of on-site industrial tests indicate that after implementing this scheme, the maximum convergence of the tunnel’s roof and floor is 352 mm, and the maximum convergence of the two walls is 150 mm, effectively controlling the surrounding rock deformation and ensuring the safe and stable use of the tunnel.

       

    /

    返回文章
    返回