关键词: 似膏体充填, 分级尾砂, 全尾砂, 充填体强度, 充填配比方案

Abstract: At present,the coarse tailings from vertical tailings silos after free settling in a mine are used to realize self-flow cemented filling.There exist such problems as large amounts of bleeding at filling body,long solidification time and low strength in backfilling process.Aiming at the problems existing in the current filling method of the mine,and combining with the advantages of paste backfilling，the tailings paste-like backfilling ratio tests were carried out.The physical and chemical properties of the whole tailings and the classified tailings were mainly analyzed.On the basis of this,the experimental research on the paste-like backfilling ratio of the whole tailings and the classified tailing was carried out to contrast and analyze their index on slump,bleeding rate and uniaxial compressive strength.Combined with the requirements for the strength of the filling body in the mine production,the optimal matching scheme of backfilling to meet the production requirements is determined.The result shows that the whole tailings backfilling has a better effect than that of the classified tailings,and its strength can meet the needs of mine production.According to the actual mine production,the optimal matching scheme of the whole tailings paste-like backfilling is proposed.

Key words: Paste-like backfilling, Classified tailings, Whole tailings, Strength of filling bodies, Matching scheme for backfilling