Experimental study on the influence of brine on the strength of tailings cemented backfill

In order to study on the effect of brine on the strength of tailings cemented backfill, the strength test of fillings under different curing ages, different mixing waters and different sand-sand ratios is carried out.The test results show that the strength of the filling block and the maintenance age are a power function relationship.Brine will increase the early strength of the filling(7 d), but will reduce the long-term strength of the filling(7-28 d).Through the analysis of the extremely poor influencing factors of the filling body strength, the curing age is the main factor affecting the strength of the filling body.