关键词: 废石, 胶结充填, 工艺参数, 充填体强度

Abstract: The amount of waste stone produced by a mine is about 90 000 m³/a,and the amount of waste stone that is currently piled up exceeds the design capacity of the waste yard,the cement-waste rock filling method is proposed.Through test study of the cement-waste rock filling material and strength design required for the quarry,the cement-waste filling ratio is obtained,the water-grey ratio was selected as 0.6 and the ash-waste ratio is determined as 0.2.Through industrial test,the strength of the backfilling body can meet the stope mining requirements.Besides that,from the two-step back-picking revealed the effect of filling,the backfilling body has the characteristics of high jacking rate,good stability and homogeneity,which can provide reliable support for the two-step safe mining operation,the recovery rate of the stope is improved more than 15％,the economical benefits are significant,the discharge problem of waste ore of the mine is solved,which is helpful for making full use of waste rock and realizing the goal of non-waste mining.

Key words: Waste rock, Cemented filling, Process parameters, Strength of backfilling body