基于PFC 2D的含节理岩体单轴压缩数值模拟

基于颗粒流方法模拟含节理岩体的单轴压缩破坏过程,并对不同节理倾角的岩体进行单轴压缩数值模拟,研究不同节理倾角岩体的裂纹扩展路径、破坏形式以及强度变化规律。结果表明:(1)在单轴压缩破坏过程中,岩体节理倾角不同,裂纹扩展与最终破坏形态不同,但破坏过程基本一致;(2)当节理倾角从0°到90°的变化过程中,抗压强度随节理倾角的增大先减小后增加,总体呈"U"型分布规律,并在倾角为60°时达最小值。

Numerical Simulation of Uniaxial Compression of Jointed Rock Mass Based on PFC 2D

Based on the particle flow method, the uniaxial compression failure process of jointed rock mass is simulated, and the numerical simulation of uniaxial compression is carried out for rock mass with different joint obliquity to study the crack propagation path, failure mode and strength change rule of rock mass with different joint obliquity. The results show that: (1)in the process of uniaxial compression failure, the joint obliquity of rock mass is different, the crack growth and the final failure form are different, but the failure process is basically the same; (2)when the joint obliquity changes from 0° to 90°, the compressive strength decreases first and then increases with the increase of joint obliquity, which shows the "U" type distribution law, and reaches the minimum value when the obliquity is 60°.