Study on Stress Evolution and Crushing Behavior of Jointed Rock Mass under Confining Pressure and Joint Materials

To study the effects of confining pressure and joint material properties on stress evolution fracture behavior jointed rock mass under SHPB impact load, numerical software LS-DYNA indoor system are used to carry out experimental research intact mass. The peak stress, reflection transmission coefficient, specimen failure state specimens different schemes obtained. level propagation attenuation law explosive waves expounded. test results show that when is within a specific range, resistance limestone can be increased, more difficult it destroyed. Moreover, if continues increase after rising value, will decline. In case, decrease—the dynamic strength changes with change in material. cement highest, gypsum second, epoxy resin lowest. damage has same as above.