Fracture mechanism of rock around a tunnel-shaped cavity with interconnected cracks under blasting stress waves

• Published in: International journal of impact engineering Vol. 157; p. 103999
• Main Authors: Li, Xiaohan, Zhu, Zheming, Wang, Meng, Xiao, Dingjun, Shu, Yun, Deng, Shuai
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.11.2021; Elsevier BV
• Subjects: Blasting; Crack initiation; Crack propagation; Dynamic response; Dynamic stability; Dynamic stress concentration; Fracture mechanics; Fracture modes; Mathematical models; Propagation; Propagation velocity; Rock masses; Stability analysis; Strain gauges; Stress distribution; Stress propagation; Stress waves; Tunnel; Tunnels; Wave propagation; Dynamic stress concentration; Tunnel; Blasting; Fracture modes; Crack propagation

•A new specimen with a tunnel-shaped cavity and interconnected cracks was proposed.•The incident direction of blasting stress waves affects crack initiation and propagation.•The RHT parameters of green sandstone can well characterise the dynamic response of rock.•Interconnected cracks greatly change...