ABSTRACT
The shallowly buried explosion technology is widely used in the military and civilian fields. Based on the continuum-discontinuum element method, the evolution characteristics of displacement and crack of rock mass under shallowly buried explosion loading are studied. First, a full-time numerical simulation of rock mass is conducted. Then, the displacement evolution characteristic of rock mass is investigated. Finally, the crack evolution characteristic of rock mass is investigated. The numerical results show that the rock mass undergoes three stages of extrusion deformation, slippage, and dispersion, and finally, an obvious infundibular crater appears. The interface undergoes tensile failure and shear failure, and the interface near the explosive mainly undergoes shear failure. The cracked interface mainly appears in the explosion stage, and the cracked interface in the explosion stage accounts for 94.16% of the overall cracked interface.
