ANALYSIS ON THE INFLUENCE OF MINE CAVE LOCATION ON SLOPE STABILITY

The excavated in the mountain for a mining tunnel will have both advantages and disadvantages on the stability of the slope, and the adverse effects may lead to serious consequences such as failure of slope. In this paper, a series of generalized slope model is established. Based on the three dimensional fast Lagrangian analysis of continua, the numerical simulation software FLAC3D is used to simulate the excavation at different locations of the generalized model. The stability of the slope after excavation is analyzed, and the influence of mine location on slope stability is summarized. In order to verify the rule from the generalized model, the physical model is established and the numerical simulation is carried out with the background of the geological landslides disaster of Shanyang in Shaanxi Province. The results show that when the excavation is in the shoulder position, the slope is more stable than that without excavation. When the excavation position near the slope, the stability of the slope is reduced. When the excavation is gradually moved from the surface to the inside of the slope, the stability of the slope decreases first and then increases, especially when the excavation is near the most dangerous sliding surface, the slope has its lowest stability. This paper can be used as the theoretical guidance for the activity of mine slope safety.