In view of underground mining,an ore-rock stability evaluation was taken combining the fuzzy-grey-element,on the parameters that are capable to reflect ore-rock stability.Based on fuzzy-matter-element theory,grey system theory and correlation function calculation,a fuzzy-grey-element model is set up for evaluating ore-rock stability.And a fuzzy-grey-element of correlative coefficient is constructed by correlative transformation and processing the optimal subordinate degree.The combinational weight coefficient of evaluation index was decided by combining summation normalization method with entropy method.A fuzzy-grey-element evaluation was also taken on the grade of ore-rock stability and the sequence from good to bad at Shaba Fields of Kaiyang phosphorite Mine by calculating correlation and adopting maximum correlation theory.Results obtained are all satisfactory.
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