Abstract: The veining up mining of hanging wall ore destroys the slope rock structure, redistributes the stress of slope rock, and affects the stability of slope. Taking the veining up the hanging wall ore residual slope of Shirengou Iron Mine for example, three-dimensional numerical model of veining up mining of the high residual slope of Shirengou Iron Mine is established, and stability of residual slope are analyzed through calculating with numerical simulation by using the large-scale finite element numerical simulation analysis software of ANSYS. The conclusion shows that this mining has little effects on the overall stability of the open pit slope of Shirengou iron ore, and the mining of residual slope is stable, but the supporting and management of roof at tunnel exit and goaf should be strengthened.

Key words: Veining up mining, Displacement field, ANSYS, Residual slope, Numerical simulation