地质构造带小煤柱沿空掘巷围岩变形控制技术

    Control Technology of Surrounding Rock Deformation by Tunneling Gateway Along Gob With Small Coal Pillars in Geological Structural Belt

    • 摘要: 通过分析7602回风巷道控制的技术难点,研究了围岩变形特征,确定了采用7 m小煤柱护巷较合理,提出了采用预应力全长锚固系统控制围岩变形,设计了控制方案。井下应用实践表明,方案能够有效控制围岩变形,两帮变形量缩减了约40%,保证了工作面正常回采。

       

      Abstract: Through analyzing technical control difficulties in 7602 return airway; the surrounding rock deformation characteristics are studied. It is identified that the coal pillar width of 7 m is reasonable, and the pre-stressed full-length anchoring system is proposed to control surrounding rock deformation, the control scheme is designed. The application results show that the control scheme can control the deformation effectively, which reduces roadway two-side displacement by 40 percent and ensures the mining face normally.

       

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