关键词: 全尾砂, 胶结充填, 充填体性能, 适应性

Abstract: The backfill system with classified tailings in a mine was in low efficiency with its complex process and the supply shortage of tailings.The test on tailings parameters was carried out，the four concentration sample slurry（66%，68%，70% and 72%）were prepared with 3 different dosage of cements（1∶〖KG-*2〗4，1∶〖KG-*2〗8，1∶〖KG-*2〗12）for the capability test of settlement，infiltration，concretion and strength.The results show that the physical characteristics of the tailings were the porosity 39.71%，natural rest angle 40°，average particle size 0.0497 mm，the tailings were finer，the water effusion rate by settlement was 6.39%~23.76%，and concentration increased by 1.81%~8.77%; Penetration speed of 0.25~0.36 cm/h; When cements dosage is 25%，the final concreted time of 26.2~23.9 h; while 12.5%，the concreted time of 41.4~40 h，the final concreted time does not exceed 2 h; the slump height of all samples were 24.9~26.8 cm，the slurry can flow better.The 28 d uniaxial compressive strength were 0.38~1.9 MPa.And the UCS was positive related with slurry concentration，the cements dosage.the suggested ratio was 12.5% cements dosage，backfill concentration was 70%~72% according to the require of mining methods on the concretion time and UCS.The results in the paper was coming to a standard for the determination of cemented fillings slurry performance made by unclassified tailings in similar mines.

Key words: Unclassified tailings, Cemented filling, Fillings performance, Adaptability