Studying the movement characteristics of unstable rock and falling rocks is crucial for providing precise and scientific basis for the design of unstable rock management. In order to obtain relative parameters of rockfall motion, taking the unstable rock and rockfall at the Damaotian coal mine as its research object, through on-site investigations of the locations and quantities of rockfalls that have already occurred, the inversion method is used to calculate the collision recovery coefficient and rolling friction coefficient of the unstable rock. Subsequently, the RocPro3D software is used to construct a three-dimensional realistic model of the unstable rock, and the model is employed for quantitative calculations. The research results indicate:1) The established model can quantitatively calculate the real-time horizontal distance, bounce height, and maximum energy of rockfalls;2) The numerical simulation results are closely aligned with those obtained from standard formula calculations, with minimal error. This study provides scientific basis for hazardous rock management design, effectively avoiding resource waste caused by excessive management.