Abstract: The filling material experimental research is conducted so as to obtain the reasonable filling pulp conveying parameters and proportion of filling materials. The research results indicated that, graded distribution of the stope backfilling materials is good, grading of the stope backfilling materials is uniform and the backfilling setting velocity is fast. When the concentration of the cement-tailings slurry backfilling materials is 68%~72%, good performance of pipe flow transmission and water retention are obtained, bad phenomenons such as segregation and settlement are eliminated.Hardening of solidification situations of different cement-tailings contrast filling blocks are normal, strength of filling blocks is improved steadily. On the whole,the strength of filling blocks are good, the concentration of the slurry can be improved by adding the cement so as to improved the strength of filling bodies.

Key words: Whole tailings, Cemented filling, Filling materials, Cement-tailings ratio