| 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°. |