Laboratory study of dynamic mechanical characteristic of granite subjected to confining pressure and cyclic blast loading

To investigate the deformation characteristic of deep rock under cyclic blasting, the static-dynamic loading experimental equipment was set up. The dynamic strain gauges and high-speed (HS) camera were adopted to obtain strain field and the crack propagation of rock under confining pressure of 0 MPa, 5 MPa and 10 MPa. Under the one-time loading from cylindrical charge, the cracks in crushed zone were generated by shear and tensile failure....