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针对用于各向异性岩石材料的修正后的Hoek-Brown准则,推导相应的数值计算格式,将其引入可对横观各向同性介质进行弹塑性分析的二维有限元程序中,以一个假定的位于层状岩体中的矩形地下洞室为算例,通过改变岩体层面的倾角,计算和分析围岩中的位移、应力及塑性区。结果表明:当岩体层面的方向位于某些角度时,围岩中可能无或出现范围不同的塑性区,层状岩体各向异性的变形和强度特性对洞室围岩的力学动态及稳定性具有强烈的影响。
Aiming at the modified Hoek-Brown criterion for anisotropic rock materials, the corresponding numerical calculation format is deduced and introduced into the two-dimensional finite element program which can elasto-plastic analysis of transversely isotropic media. , A rectangular underground cavern located in a layered rock mass is taken as an example to calculate and analyze the displacement, stress and plastic zone in the surrounding rock by changing the inclination of the rock mass. The results show that the deformation and strength characteristics of anisotropic deformation and strength of the layered rock mass may have influence on the mechanical dynamic and stability of the surrounding rock of the cave when the direction of the rock mass plane is at certain angles. Sex has a strong influence.