淮南深部巷道挤压变形及其控制对策

    Huainan Deep Roadway Squeezing Deformation and Its Control Countermeasures

    • 摘要: 为了研究高地应力软岩巷道挤压变形及其控制对策,根据实测地应力值和围岩力学参数,分别从基于Hoek-Brown准则的解析计算和有限元数值计算进行了围岩稳定性分析,计算结果显示巷道变形失稳严重,拱顶位移和底臌量大,与现场情况吻合;此外,根据Hoek挤压变形等级曲线判定该巷道围岩变形为非常严重的挤压变形。基于深部巷道围岩稳定性控制理论和“分步联合支护”理论制定了控制围岩挤压变形的支护方案,通过有限元数值软件计算和现场监测验证了该支护方案的效果,结果表明所提出的支护方案能够有效的控制围岩挤压变形。

       

      Abstract: In order to study the squeezing deformation and control measures of soft roadway with high ground stress, according to the measured stress value and surrounding rock mechanical parameters, the stability of surrounding rock is analyzed based on the analytical calculation of Hoek-Brown and finite element numerical calculation, the results show that the deformation and failure is very serious after excavation, the crown displacement and the floor heave amount is very large, which is consistent with the site situation. The deformation of roadway surrounding rock is determined as very serious squeezing deformation according to Hoek squeezing deformation level curve. Based on the stability control theory of deep roadway surrounding rock and the theory of "step by step combined supporting", the control methods of are carried out. Through the finite element numerical calculation analysis and site monitoring, the evaluation of the supporting effect is verified, the results show that the proposed scheme of supporting achieves good effect and can control the squeezing deformation effectively.

       

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