Prediction of continuous–discontinuous failure of granite subjected to direct shearing using acousto-optical-mechanical scheme

The catastrophic failure of deep rocks is difficult to predict, which generally exhibits a continuous–discontinuous behavior. A multimodal acoustic–optical–mechanical (AOM) monitoring system integrating acoustic emission (AE) analysis, digital image correlation (DIC), and mechanical loading was developed to address this limitation. Direct shear tests on granite were conducted under six different normal stresses to investigate the AOM responses during shear rupture. The shear failure was divided into three stages: Stage I—compaction and stable crack propagation, Stage II—from crack damage stress to catastrophic failure, and Stage III—post-peak residual shear and structural reconfiguration. The acoustic quiet…

• NN
  National Natural Science Foundation of China

  Awards: 52422403, U22A20166
• GS
  Guangdong Science and Technology Department
• NS
  National Science and Technology Major Project
• MR
  Mineral Resources
• NM
  National Major Science and Technology Projects of China

  Award: 2024ZD1003903