Strength Prediction Model of Cemented Backfill and Inversion Calculation of Cement Consumption

With the development of trackless equipment and filling technology, the high stage subsequent cemented filling method had been successfully applied in Lilou mine. On account of price of collapsed severely of iron ore, it was of paramount importance to defuse costs on the basis of ensuring the strength of the filling body. Based on the slump test of whole tailing slurry, 9 groups of ratio tests were devised and the strength prediction model of cemented backfill was established. The actual cement consumption in the stope was calculated by using the fitting formula of the prediction model. The quantitative relationship between the design and actual cement consumption was analyzed. The results showed that there was a large surplus of cement dosage in the 12-1^#and 12-5^# stope, which were 19.45 and 17.56% respectively more than design. Along with improvement of technical proficiency and calibration of measuring instruments and materials conveying equipment, the cement consumption will be reduced in a larger space.