In order to study the scope and distribution law of rock damage induced by blasting, using the Holmquist-Johnson-Cook model based on the LS-DYNA software, this study focuses on the variation of the blast damage scope of the limestone with the increase of a radial uncoupling coefficient K
, and then the distribution law of damage under the condition of coupling charge is comparatively analyzed for the limestone, tuff and granite porphyry, and the damage evolution is further characterized by the Logistic function model. The simulation results show that the HJC constitutive model is capable of characterizing the blast-induced damage during the numerical simulation. The ratio of damage radius to bore-hole radius decreases fast first and then slowly with the increase of the radial uncoupling coefficient. The damage curves of different rocks all show an inverted-S attenuation, but there are some differences in the damage distribution characteristics. The crushing zones of the limestone and tuff are larger and the corresponding boundary between the crushing zone and the cracking zone is obvious, while the crushing zone of the granite porphyry becomes smaller and the corresponding boundary is indistinct. The research results can provide some technical references for the assessment and control of blast-induced damage in practical engineering.