By using numerical simulation soft FLAC~(3D) and based on the Nantun mining area and Zouji highway above it,a deep research on failure mechanism and process is conducted,which can theoretical and technical support to the arrangement of mining scheme and the high-class highway maintenance management at the same time. The research shows that under the same geological conditions and infection of mining zone,the highway's capacity of resistance to deformation is strongest,first-class highway and second-class hi...