Sometimes, rock heaps are developed in some areas where railways, highways and other transportation projects are constructed. The physical and mechanical characteristics of the rock heaps are determined by the structures formed in different conditions. Numerical simulation and analysis of rock heap formation were performed to understand the rock structure formed under seismic motion. Discrete element method was adopted in simulating the formation process of rock heap. The cataclastic texture rock slopes were selected as the potential material supplying sources forming rock heap under seismic motion. The formation mechanism and development process are studied in different terrain conditions. The results show that the responses of slope surface increased from down to top, the blocks on the top surface were more likely to be thrown; the bottom shear failure in cataclastic texture slope was the main reason for the collapse of slope and formation of rock heaps. In addition, the inner structure of rock heap is analyzed using sectional slicing and three-dimensional sampling method.

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