Stress analysis of single range holes with simultaneous blasting

Using stress analysis theory and method, rocky crushing mechanism between two holes of single line hole simultaneity explosion is studied. Analysing the distribution of rocky tension pressure region, pressure region, pure tension surface in the range of two holes explosion and the elastic displacement region's stress, strain and movement state during explosion, it is considered that during the precrack explosion, big hole distance and other single line hole simultaneity explosion, the penetration between two holes is identical, the penetration is not accomplished only by the tension vertical to the gun port center on line, and all factors that make rock to form the deformation and displacement facing the free surface affect the penetration between two holes.