STUDY ON REMOLDING DESIGN STABILITY OF ABANDONED MINE SLOPE BASED ON FLAC^3D

The abandoned quarrying mines in Lishu County, Jilin Province have caused a large area of land damage and vegetation damage, and the high and steep slopes formed in the historical mining process have produced hidden dangers to the safety of local people. In view of this situation, in order to effectively restore the ecological environment of the mine, eliminate the hidden danger of geological disasters and develop characteristic tourism projects, this paper puts forward the remolding scheme of the abandoned mine slope. According to the overall planning requirements, the existing mine slope is remade to eliminate potential geological disasters, and at the same time, trees are planted in the pit and the platform to restore the slope ecology. Finally, the finite difference method is used to calculate and analyze the stability of the mine slope under the current conditions and after remolding. The results show that:1) Under the current condition, the high and steep slope is affected by unloading and weathering, and the rock mass cracks gradually increase, especially the unloading effect of the top rock mass gradually strengthens, and the local joint cutting of the current slope is easy to appear the phenomenon of block loss; 2) The remolding enhances the stability of the mine slope and meets the specification requirements. The research results provide a reference for the remolding design of the abandoned mine slope.