The optimal selection model of mining method based on statistical fuzzy weights and fuzzy interval evaluation

In order to solve the problem in selecting evaluation indexes and determining their weights,the calculation method of evaluation index weights based on statistical method was proposed.The fuzzy interval weights of evaluation indexes was determined which was combined by the statistical weights based on selected times of index weights and the statistical weights of evaluation indexes with their weights as the boundary of fuzzy interval weights,and the comprehensive calculation of two kinds of statistical weights as the most possible numbers of fuzzy interval weights,after comprehensive analyzing of numerous mining experts' evaluation index models by counting and analyzing their papers of mining method optimization.The fuzzy interval evaluation model and a probability density function of interval number which calculated succinctly are established,and a ranking method of interval numbers is also designed based on the fuzzy evaluation principles.Evaluation methods are ranked as the maximum possibility and the interval numbers by using the fuzzy interval evaluation method,the final ranking of evaluation methods was determined by considering the two kinds of ranking methods.The optimal selection of mining method of a multilayer mineral deposit by applying the optimal selection model of mining method based on statistical fuzzy weights and fuzzy interval evaluation shows that it is more accurate and reasonable to represent the value of evaluation index weights by fuzzy interval numbers,and the evaluation process is better to simulate the fuzziness and uncertainty during the optimization,which is valuable for the optimal selection of mining method.