Based on the blasting demolition of a 7-storey frame-shear wall structure in Wuhan, this study investigates the impact of different incision patterns on the collapse process. A refined finite element numerical model was established using ABAQUS, with steel and concrete supporting columns modeled separately and the upper collapse body modeled as a whole. This approach enables accurate simulation of the mechanical behavior of supporting columns while improving computational efficiency. A triangular incision form model was also developed and compared against the trapezoidal incision form used in the project. The stress distribution, recoil distance, and collapse motion characteristics of supporting columns under the two different incision forms were analyzed to explore their effects on the collapse process. Results indicate a high consistency between the numerical simulation and the actual collapse regarding timing, motion characteristics, and overall process, validating the modeling approach. Compared to the trapezoidal incision form, the triangular incision form features a lower center of gravity, causing the structure to tilt quickly around the incision vertex post-detonation. This leads to rapid failure of the rear-row support columns under large eccentric pressure. Consequently, the collapsed body makes ground contact faster, at a higher velocity and disintegrates more thoroughly. Additionally, the triangular incision generates greater horizontal kinetic energy, resulting in a larger recoil distance. This analysis highlights the significance of incision form selection in optimizing blasting demolition outcomes.