Abstract: According to the mine production situation and the basic parameters of the filling materials,the concentration and strength of filling materials are determined, furthermore, the tailings backfill ratio is researched. The research results show that,the filling ratio of 1〖DK(〗∶〖DK)〗10 can meet the demand of the mine production and the quality of filling and the production efficiency can be improved by adding 501 additive.

Key words: Classified tailings, Cemented filling body, Ratio optimization