Abstract: Aiming at the characteristics of high contents of mud and fine grain of the unclassified tailings of copper mine,industrial waste materials is activated by a new compound activator to produce new gelling material by test.The intensity test results of filling bodies show that when the total concentration of filling slurry is 65%,in 28 days, the intensity of the filling body of new gelling material and unclassified tailings with 1∶6 ratio is 1.44 times of the one of the filling body of cement and unclassified tailings with 1∶3 ratio,3.9 MPa. And the intensity of the filling body of new gelling material and unclassified tailings with 1∶8 ratio is 2.5 MPa, which is close to the one(2.7 MPa) of the filling body of cement and unclassified tailings with 1∶3 ratio, which is suitable to the requirement of mine filling intensity.The subsidence test results and slump test results of filling bodies show that the water retention of the new gelling material is good,the liquidity of the new gelling material can meet the requirement of mine filling conveying,therefore,the marketing value of the new gelling material is good.

Key words: Unclassified tailings of copper mine, Gelling material, Compressive strength, Subsidence concentration, Slump