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为快速、批量地进行参数敏感性研究,基于各向异性弹性力学的理论,将具有两组正交节理的双重孔隙-裂隙介质简化为平面正交各向异性无限域,建立了相应的物理方程,得出此无限域中圆形洞室周边切向应力的弹性解析公式。对节理、基岩的几何及弹性常数、侧压力系数、边界荷载作用方向角等因素的应力敏感性进行了分析。其结果表明:节理的间距及刚度、基岩弹性常数的变化对洞周切向应力的影响不大;而侧压力系数、边界荷载作用方向对洞周切向应力的分布及量值有显著的作用;在边界荷载作用方向为某个角度时应力波峰和波谷的差值最大,这意味着此时洞室的稳定性最差。
In order to study the parameter sensitivity quickly and in bulk, based on the theory of anisotropy elastic mechanics, the double pore-fracture medium with two orthogonal joints is simplified to the plane orthogonal anisotropy infinite field, and the corresponding physical equations , The elastic analytical formula of the tangential stress around the circular cavity in this infinite domain is obtained. The stress sensitivity of joints, geometrical and elastic constants of bedrock, lateral pressure coefficient and direction angle of boundary load are analyzed. The results show that: the pitch and stiffness of joint, the change of bedrock elastic constant has little effect on the tangential stress of the hole, while the distribution and the magnitude of the tangential stress of the hole around the hole have significant difference between the lateral pressure coefficient and the boundary load direction The difference between the stress peak and the trough is the largest when the direction of the boundary load is at an angle, which means that the stability of the cavern is the worst.