层状岩石强度特征及其数值实现

为了实现层状岩石横观各向同性的数值描述,首先通过理论分析得到层状岩石的强度特征以及层理面处于极限应力平衡状态时,主应力满足的条件;然后,应用相应数值实现方法,对比理论分析结果与数值计算结果。结果发现,单轴压缩和三轴压缩情况下,对于不同的层理面倾角,数值计算与理论分析的结果基本相同,差别在2%以内,说明所引入的数值计算方法能够较好地描述层状岩体的破坏特征。

Strength Characteristics of Stratified Rock and the Numerical Simulation

In order to study the transversely isotropic characteristics of stratified rock by a numerical analysis method, the principal stress state of rock for the limit equilibrium state in jointed planes is first obtained by theoretical analysis. as the basis of the numerical procedure method. The theoretical and numerical results are compared for rock samples under uniaxial compression and triaxial compression, which shows that, for the different inclinations of joint plane, the numerical result is almost the same as the theoretical one, with the maximum difference less that 2%, so the numerical calculation method proposed in the present paper can describe the failure characteristics of stratified rock very well and can improve the ability of numerical simulation.