DYNAMICS OF MICROFAILURES IN ELASTIC ZONE DURING EXPLOSION OF SPHERICAL CHARGE IN ROCK

摘要

A calculated model is developed for explosion of spherical charge in rock; it takes into account accumulation of damages in the elastic zone under the action of blast wave. The condition, under which the density of generated microcracks reaches the critical value, is used as failure criterion. The microcrack growth rate is determined by exponential function of equivalent stress.