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The West Wing ventilation roadway, featuring a quasi-rectangular cross-section, has been in service for an extended period and now exhibits significant deformation. The surrounding rock mass consists primarily of weak strata, with frequent roof penetration events, localized collapses, and severe floor heave observed along the tunnel. Given the unique geological conditions at Shandong Fengyuan Yuanhang Coal Mine—particularly the narrow 4.7 m interburden between the 16# coal seam extraction level and the West Wing ventilation roadway—this study aimed to optimize the support system for such challenging soft-rock conditions. Through field investigations and theoretical analysis, the research team developed an improved support strategy specifically designed for soft-rock rectangular tunnels adjacent to active longwall panels. Numerical modeling was employed to rigorously assess the proposed solution’s effectiveness. The results show that the optimized support system successfully controls key deformation issues, including roof subsidence and floor heave, in the West Wing ventilation roadway. This finding not only confirms the scientific validity of the design but also demonstrates its practical feasibility for real-world applications.

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Research on the Support and Reinforcement Technology of the Rectangular Soft Rock Roadway Across the Close Distance of the Mining Face

  • 会议论文

  • 发表日期：

    2026年

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  • Shenghua Qiu,
  • Rui Liu,
  • Dexin Liu,
  • Yingquan Zhu,
  • Fuhui Cao

摘要

The West Wing ventilation roadway, featuring a quasi-rectangular cross-section, has been in service for an extended period and now exhibits significant deformation. The surrounding rock mass consists primarily of weak strata, with frequent roof penetration events, localized collapses, and severe floor heave observed along the tunnel. Given the unique geological conditions at Shandong Fengyuan Yuanhang Coal Mine—particularly the narrow 4.7 m interburden between the 16# coal seam extraction level and the West Wing ventilation roadway—this study aimed to optimize the support system for such challenging soft-rock conditions. Through field investigations and theoretical analysis, the research team developed an improved support strategy specifically designed for soft-rock rectangular tunnels adjacent to active longwall panels. Numerical modeling was employed to rigorously assess the proposed solution’s effectiveness. The results show that the optimized support system successfully controls key deformation issues, including roof subsidence and floor heave, in the West Wing ventilation roadway. This finding not only confirms the scientific validity of the design but also demonstrates its practical feasibility for real-world applications.