Abstract: In order to acquire the optimal matching scheme of the full tailings-cemented filling body,decrease the filling cost and guarantee the gap stability,and taking the full tailings-cemented filling body as the research object and the uniaxial compressive strength as the research index,the influencing factors for the strengthening of the filling body are comprehensively analyzed.The sensitivity and the significance of filling body′s influencing factors were analyzed by the range analysis and variance analysis through applying orthogonal experiment.Researches showed that the optimal matching scheme of this experiment was the concentration of 75%,cement-sand ratio of 1∶6 and curing period for 28 days.The intensity sequence of the sensitivity affecting the samples from highest to lowest was the curing age,cement-sand ratio and concentration.The curing age has the most significance on the filling bodies′ compressive strength.Therefore,the mine needs to guarantee the curing age about the filling body in the practical production.

Key words: Full tailings-cemented filling body, Compressive strength, Orthogonal experiment, Scheme optimization