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破碎帶工程圍巖超前錨桿加固拱結構

Arch structure of bolt forepoling in surrounding fractured rock

  • 摘要: 在破碎帶巖層開挖時,頂板極易垮落,通常采用超前錨桿加固來做輔助支護.為了研究工程圍巖超前錨桿加固機理及其位移變化規律,把這種開挖形成的拱看成有幾何缺陷的圓弧拱.以武平紫金礦業230斜坡道在破碎帶中超前錨桿加固為工程實例,利用屈曲理論及薄膜理論對其位移的變化進行了力學分析,完善了前人對這種加固拱簡化的問題.

     

    Abstract: When the rock is difficult to cut and support in fracture zones,forepoling is usually used as auxiliary reinforcement support.In order to study the arch structure mechanism of bolt forepoling in surrounding fractured rock and its displacement evolution,bolt forepoling at the Ramp 230 in Wupin Zijin Mining Company was taken as an example,and the displacement evolution of the arch structure,which is taken as a flawed one,was analyzed on the basis of the buckling theory and the membrane theory.This study improves the simplification problem of reinforced arches.

     

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