一种早强减水剂在矿山胶结充填中的试验研究  

Experimental Study on a Hardening Accelerating and Water Reducing Admixture in Cemented Filling of Mines

作　　者：袁雪梅[1,2,3] 张友轩[1,2,3] 

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]国家金属采矿工程技术研究中心,湖南长沙410012 [3]金属矿山安全技术国家重点实验室,湖南长沙410012

出　　处：《矿业研究与开发》2016年第10期62-65,共4页Mining Research and Development

基　　金："十二五"国家科技支撑计划项目(2012BAB21G01)

摘　　要：为了降低矿山充填成本，提高充填体早期强度和改善充填料浆流动性，研制开发了一种早强减水剂。利用莱矿山尾砂进行充填料蒙强度配比试验及坍落度试验，试验结果表明：在充填料浆中添加早强减水剂后，不同灰砂比的充填料浆坍落度可增加1．5～8．5cm，试块的3d强度均在2MPa以上、7d强度均在4MPa以上，与未添加早强减水剂的试块相比，试块的早期强度提高1倍以上，证明研制的早强减水剂能显著改善流动性，较大幅度提高早期强度。In order to reduce the filling cost of mine as well as increase the early strength of filling body and mobility of slurry, a hardening accelerating and water reducing ＇admixture was developed. The proportioning tests on filling slurry strength and slump tests were carried out with the tailings of a mine. The results showed that after adding the hardening accelerating and water reducing admixture, the slump of filling slurries with different cement-sand ratios could be increased by 1.5 - 8.5 cm. Moreover, the backfill strength reached over 2 MPa in 3 days, and 4 MPa in 7 days. Compared to the filling bodies without hardening accelerating and water reducing admixture, the early strength was improved by more than I time. The study proved that the new agent can obviously improve the mobility of slurry, and effectively enhance the early strength.

关 键 词：胶结充填 早强减水剂 坍落度 充填体强度 

分 类 号：TD853.343[矿业工程—金属矿开采]