Dynamic response of cylindrical thick-walled granite specimen with clay infilling subjected to dynamic loading

To better understand dynamic characteristic of rock in mud and water environment, quasi-static and dynamic uniaxial compressive tests were performed on cylindrical thick-walled granite specimen with various clay infillings. The results from quasi-static compressive tests show the existences of a central hole and clay infilling in cylindrical thick-walled specimen have no obvious effect on static mechanical behavior of specimens. Dynamic compressive tests indicate that the dynamic compressive strength (DCS) of cylindrical thick-walled granite specimen with clay infilling, which linearly increases with the strain rate, is the sum of DCS of hollow thick-walled granite specimen and the hydrodynamic pressure of clay fillings in the central hole space. The DCS of specimen increases with the increasing moisture content of clay infilling and the decreasing hole diameter at the same strain rate.