Abstract:In order to select a better blasting effect scheme and effectively improve the roadway excavation speed, the finite element analysis software was used to numerically simulate the quasi-parallel cutting blasting technology. By controlling the amount of dosage and whether or not there is a central hole, the effective stress in the cutting cavity and on the free surface is compared: the center hole and the increase of the dosage can increase the effective stress of the blast; According to the charge structure and blasting process conditions in this paper. There is a height threshold value about 1.25m from the bottom of the hole in the blasthole, affect the distribution of effective stress of the explosion; Near the midpoint of the connection line, the effective stress on the free surface is getting smaller and smaller, which is consistent with the conclusion given by the theoretical model analysis of the double-hole blasting stress superposition. According to the distribution of the effective stress contour at the bottom of the blasthole, the quasi-parallel cutting is more suitable for the blasting of rock with a larger hardness and a deeper blast hole.