To study the failure process and characteristic of rock mass containing intermittent joint, the cracking initiation mechanism and extending process of intermittently jointed rock mass were simulated using software RFPA2D. The results show that the strength of the rock mass increases when the joint angles changed from 30°, 45° to 60°, the deformation increases and the sound emission boosts up in the prophase of the rock failure. The cracking initiation actions change from independence to interaction and the cracking propagation length decreases when the joint density increases. The middle joints quickly connect to the adjacent joints with the action of compression-shear stress, which results in the rock failure. The broken rock zone is the range where the intermittent joints connect.
|Number of pages||6|
|Journal||Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology|
|Publication status||Published - 1 Jan 2007|
- Broken rock zone
- Cracking process
- Intermittently jointed rock mass
- Numerical simulation