Theoretical research on the explosion effect of charges on rock

The dynamic response of each damage zone in rock medium under the action of explosion was discussed based on the cavity expansion theory and Coulomb law. The influence of charge property on the dimension of breaking zone was studied by changing the parameters of Jones-Miller equation of state (EOS). The JWL EOS was introduced into the rock explosion theory for the first time, and the calculated results were compared with Jones-Miller EOS. The results shows that the larger the initial average pressure of explosive product is, the smaller the attenuation exponent resulted in lager crushing zone is. Although the product pressure was overestimated by Jones-Miller EOS, and JWL EOS based on the experiment data could exactly describe the product state. The crushing zones calculated by two EOSs are in accord with the experiment results. The successful application of JWL EOS in rock explosion theory offered a viable way to establish the theory of non-ideal explosion in rock.