Study on crack initiation and damage stress in sandstone under true triaxial compression

Kong et al discuss the study on crack initiation and damage stress in sandstone under true triaxial compression. Rock masses in deep underground engineering are characterized by a complex geological environment and mechanical properties with frequent hazards such as excavation-induced spalling, rock burst and collapse. These failure behaviors result in a significant challenge for the construction of underground engineering and the prediction of abrupt hazards. It is also found that the crack initiation stress and crack damage stress have a relationship with the stress state in which the intermediate principal stress must be taken into consideration.