考虑压力和温度养护条件的胶结充填体早期强度特性研究

Study on Early Strength Characteristics of Cemented Backfill Considering Curing Conditions of Pressure and Temperature

为在实验室模拟矿山原位充填环境的压力、温度等因素对胶结充填体的固结影响,本文设计了一种考虑压力与温度协同控制的胶结充填体养护方法及试验装置。采用该试验装置开展了养护压力与养护温度对胶结充填体早期固结强度的影响研究。结果表明:养护压力、养护温度对胶结充填体早期强度有明显影响;养护压力对充填体早期强度发展有利;随着养护温度升高,胶结充填体强度呈先升高后降低的趋势,养护温度为55℃时,胶结充填体强度呈下降趋势。在养护压力和养护温度的耦合影响下,高温有利于胶结充填体的早期强度发展。

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.