Application and research on consistency combination weights for mining method optimization by multi-objective decision

Mining method selection was handled as a system engineering problem with multi-objective decision-making. First,a comprehensive multi-objective decision-making index system for mining method optimization was built in consideration of technical feasibility,economic benefit,resource utilization,labor productivity,safety and environment factors. Then,the analytic hierarchy process,fuzzy judgment matrix and Delphi method were used to get three groups of single weights for the decision-making index system.On this basis,a group of reasonable combination weights were determined through Kendall nonparametric test and Spearman rank correlation analysis. This provides a better solution for weight distribution in multi-objective decision-making,and can improve the rationality and scientificity of weight-determining methods for the decision-making index system. Finally,Jinshandian iron mine was taken as a case study on mining method selection,and the optimal mining method,sublevel open stope with backfill,was determined by this combination weight and fuzzy multi-objective decision-making method.