软岩巷道联合支护条件下围岩复合拱承载能力力学分析

Mechanical Analysis of Bearing Capacity of Surrounding Rock Composite Arch Under Combined Support of Soft Rock Roadway

煤矿巷道在深部高应力的作用下,表现出明显的软岩特性,单一支护方式难以实现对这类巷道的稳定控制。论文以金宝屯矿S106回风巷为工程背景,基于联合支护复合拱力学分析基础上,对联合支护条件下复合拱承载能力进行计算,并通过霍氏理论计算得到的围岩特性曲线对原设计支护强度进行评价。

Under the action of deep high stress,coal mine roadway shows obvious soft rock characteristics,and it is difficult to achieve stable control of this type of roadway by a single support method.The paper takes the S106 return airway of Jinbaotun Mine as the engineering background,and based on the mechanical analysis of the composite arch with joint support,the bearing capacity of the composite arch under the condition of joint support is calculated,and the surrounding rock characteristic curve calculated by Huo’s theory.The original design support strength is evaluated.