Abstract: In the mining process of underground bauxite mine,the biggest problem is the high loss rate and dilution rate of ore mining,which causes serious waste of national resources.To select the optimal mining method,taking a gently inclined thinlayer bauxite mine as an example,combined with the characteristics of underground mining,this paper establishes the optimal decisionmaking model by using the fuzzy mathematics method,obtains the weight of each index,and makes a comprehensive evaluation of the three mining methods,and determines that the optimal scheme is the hydraulic support mining method,which is finally verified by the industrial test,and obtains good results.At the same time,it is also selected for other mines The appropriate mining method provides a reference.

Key words: Loss rate,Dilution rate,Bauxite,Fuzzy mathematics method,Mining method