Abstract: To investigate the sensitivity of blasting effects to different blasting hole parameters, a finite element sample model based on the RHT damage constitutive method was established to conduct numerical simulation analysis of blasting effects under different hole depths, blasting depths, sealing gaps, and blocking lengths. Rock mass fragmentation simulation was carried out, and the accumulation of damage on the upper surface and the internal stress evolution process were collected. The fragmentation characteristics of the rock mass and the crack propagation laws were analyzed, and the following conclusions were obtained: (1) By analyzing the crack propagation on the upper surface of the sample, it can be known that the greater the blasting depth, the thinner the thickness of the upper surface crushing zone, while the average crack length shows a process of first decreasing, then increasing, then decreasing again, and then increasing again, that is, when blasting at the middle position and the bottom position of the hole, the formed cracks are longer; (2) Under the current simulation conditions, the greater the hole depth, the better the fragmentation effect; (3) When the sealing gap between the hole and the electrode increases, the average crack length on the free surface of the rock sample first decreases rapidly, and then when the sealing gap exceeds a certain threshold, the average crack length basically stabilizes; (4) When the blocking length increases, the crack length and width will rapidly decrease until they can hardly produce cracks on the free surface of the rock sample top, and the thickness of the crushing zone will also decrease until it cannot form a crushing zone; (5) The analysis of the influence of blasting hole parameters shows that the sealing gap has the greatest impact on the impact wave fragmentation effect, and the hole depth has the greatest impact on the thickness of the upper surface crushing zone.