Abstract:In Yichang a total phosphorus mine tailings as raw material, the experiment scheme is designed on the relationship between the concentration of slurry, cement sand ratio and curing time of three factors of the mechanical properties of tailings filling cementation, and the production of filling specimens with cement sand ratio 1︰4～1︰10, and the slurry concentration of 68%～75%, respectively, 3, 7, 14-day maintenance and after the 28-day uniaxial compressive strength test, and through linear, polynomial and exponential fitting methods explore the quantitative relationship between the three and three factors of the strength. Backfill strength and sand ratio characterized by polynomial function, the concentration of slurry is characterized by polynomial function, and the maintenance schedule sign of exponential function. With the strength of cement sand ratio decreases while the decline and the decline trend slowed down, while increasing and increasing trend is more obvious with increasing slurry concentration increases with the curing time increased progressively but the increasing trend gradually slow. The research results can provide reference for the determination of the strength of cemented stowing of full tailings filling in similar phosphate mines.