Abstract:According to the force mechanism, the control fissures of shear-type unstable rocks are classified into compression-shear and tension-shear types. A calculating method of cracking angle (θ0) and fracture toughness (GIC) are put forward using a maximum strain energy release criterion. Taking Shoulishan typical unstable rocks in Wanzhou district of Chongqing, China, as examples, the calculation results show that the cracking angles with maximum strain energy release criterion are the same as those with maximum circumferential stress criterion. The cracking direction of the control fissures points to the free face.
ZHANG Yi,XU Lijun,WANG Hao. Fracture Propagation of Control Fissures Based on Energy Criterion in Share-Type Unstable Rock[J]. jgg, 2018, 38(2): 132-135.