In order to extend the service life of the tailings pond and treating the goaf,it is urgently necessary to carry out experimental research on phosphate filling in Jinsha phosphate mine,providing basic data for the process design of the backfill system.By sampling of filling materials,the physical and chemical properties parameters of phosphate tailings were tested and analyzed.Based on the flow performance,bleed-ing rate,and filling ratio test of the filling slurry,the influence of factors such as filling concentration and sand-ratio on the mechanical properties of the backfill was comprehensively determined.Furthermore,the strength growth mechanism of the backfill was analyzed by SEM-EDS microscopic test method.The main reason for the strength growth of the backfill was that the cement hydrated to form fibrous C-S-H gel,over-lapped with fine tailings particles to form a whole,and filled the internal pores of the specimen.The re-search results can provide reference for determining the cemented filling parameters of tailings in similar phosphate mines in China.
维普
万方数据
