The Effect of Confining Pressures on Rock Fracturing under Dynamic Loads
In order to investigate the effect of confining pressures on rock dynamic fracturing under dynamic loads, a 2D finite difference dynamic numerical model for a circular rock sample with a single centralized borehole is developed. According to the material properties and loading conditions, shock and linear equations of state are combined and applied to the rock material in this model. A modified principal stress failure criterion is applied to determining material status. It is shown that as the increase of mining depth, the extent of blasting-induced damage of rock increases significantly.
Jun Hu and Qi Luo
Z. M. Zhu et al., "The Effect of Confining Pressures on Rock Fracturing under Dynamic Loads", Advanced Materials Research, Vol. 320, pp. 255-258, 2011