Study on strength influencing factors and strength model of cemented backfill with mixed aggregate

The strength of cemented backfill is one the important indexes affecting filling effect. There are many factors that affect backfill. In order to explore influence law strength, firstly, test with mixed aggregate was carried out on basis physical and chemical analysis materials particle size distribution aggregate. Then, according results, effects aggregate, solid mass concentration Cw,%, cement content Bw,%, their interaction were analyzed. Finally, model established by using industrial parameters such as gradation, reliability analyzed, verification out. results show affected single Bw,% also these factors. Except for a few points, relative error less than 10%. average values 3-day, 7-day, 28-day 6.32%, 2.46%, 0.92%, respectively, which shows has good applicability predicting in Jinchuan mine.