Abstract:In view of the engineering geological conditions of the Bojitian gold deposit with complex concealed large gold deposits, the mining method is optimized by mathematical fuzzy method. Firstly, on the basis of the four primary mining methods, the index is quantified by the Technique for Order Preference by Similarity to an Ideal Solution, and the Euclidean distance of the positive ideal solution calculated by the matrix is established, so as to obtain the final order of advantages and disadvantages of the four mining methods according to the fitting degree. Secondly, through numerical simulation, the distribution of the maximum stress field and the distribution of the plastic zone are analyzed, and the order of advantages and disadvantages of the four primary mining methods is obtained. The results show that the upward drift filling mining method is the optimal mining method of Bojitian gold deposit, which provides a reference for the selection of mining methods of Bojitian gold deposit and accumulates experience for the mining of similar complex gold deposits in Guizhou.