Experimental Study on the Optimization of the Ratio of Cemented Filling Materials Ultra-fine High-sulfur Tailings

Abstract: According to the problems existing in the operation of Pakistan Duddar Lead-zinc mine filling system, around the gobi aggregate soil content increase and insufficient supply contradiction, meet the strength of the mining process, to further reduce the filling cost as the optimization direction, respectively add fly ash, waste stone crushing material instead of gobi aggregate, increase the use of tailings and low ash sand ratio experiment.The experiment shows that the Gobi aggregate can meet the filling strength requirements; adding fly ash and reducing the sand ratio are available in the stope with specific conditions, and can reduce the filling cost by adding admixture and fine slag powder.Based on the actual situation of Duddar Lead-zinc mine site, the best scheme to optimize the ratio of filling materials is adopted by increasing the amount of tailings and adding admixture.