Abstract: Ore rock caving in the natural caving method is a process of undercutting and unloading，ore-rock caving and even forming a balance arch. Its essence is to repeat the process continuously. The regularity of ore rock caving is affected by geological and engineering factors such as ground stress，stope structural parameters，physical and mechanical properties of ore rock. At present，most of the research is assumed to be two-dimensional model，focusing on the theoretical method or numerical simulation analysis of the caving process and the shape of the caving arch，less involving the research of the caving process in three-dimensional space. According to the main characteristic parameters of the ore rock caving process，a constitutive model is established to describe the mechanical characteristics of the process，and FLAC^3D is used to realize the numerical simulation on the effects of the ore body occurrence depth，side pressure coefficient，bottom form and stope size parameters on the regularity of ore rock caving. The research conclusions are helpful to guide the field practice.

Key words: Geostress, Structural parameters of stope, Falling height, Falling volume