Abstract：The dynamics finite element program LS-DYNA3D is employed to simulate the high-explosive explosion experiment in granite，which has a crooked tunnel that is backfilled with concrete stemming. The appropriate material models and its parameters are important in numerical simulation. Together with the results of high-explosive explosion experiments，the computational methods，physical models，constitutive models，and their parameters that used for calculation are established and validated by large numbers of numerical tests. Elastic-plastic-hydro material model is used for granite，and the JHC model is used to describe the dynamic response of concrete. The equation of state(EOS) of JWL is used to determine the pressure of detonation products of high-explosive. Free field parameters and the failure regions are calculated. The reach time of stress wave in wall rock and tunnel is analyzed and compared. The simulated results agree well with the experiments results. This work can be regarded as the basement for numerical simulation of the explosion in granite and can be used for such experimental studies.
