Abstract: To simulate the in situ influence of pressure,temperature and other factors on the mechanical performance of cemented backfill in a laboratory environment,this paper designed a testing apparatus considering the cooperative control of applied pressure and temperature during the curing of cemented backfill samples. The influence of applied pressure and environmental temperature during curing on the early-age strength of cemented backfill samples was studied. The results show that both curing pressure and curing temperature have a noticeable influence on the early strength of cemented backfill samples. The curing pressure is beneficial to the early strength development of cemented backfill samples. With the increase in curing temperature, the strength of the cemented backfill samples initially raised as well,then decreased while the curing temperature reached 55 ℃. Under the coupled influence of curing pressure and curing temperature,high temperature is beneficial to the early strength development of cemented backfill samples.

Key words: cemented backfill,tailing,applied pressure,environmental temperature,early-age strength