Abstract:Among the strategic resources of rare and precious metals in China, thin vein mines account for 60%. The mining of this type of mine is characterized by small mining width, high loss and dilution, and low level of mechanization. Therefore, the selection of mining methods is of vital importance. In this paper, the grey system theory is used for this type of ore body to construct a grey system model for optimizing the mining method of steeply inclined thin veins. Combined with the actual production situation on the mine, eight indicators such as mining loss dilution rate, mining cost and production capacity of the stopa are considered as the key factors for screening. The Analytic Hierarchy Process (AHP) is adopted to assign weights to each indicator. It is obtained that the concrete cushion layer cliff filling method is the optimal mining method. This mining method was actually used on site, and the results obtained from the test stope were good. The AHP-grey correlation analysis provides a reasonable theoretical basis for the screening of mining methods for the mining of the mine.

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