粗骨料与细骨料胶结充填体强度对比分析  

Strength Comparative Analysis of Cemented Backfill of Coarse Aggregate and Fine Aggregate

作　　者：邓代强[1] 肖利平[1] 段瑜[1] 江飞飞[2,3] 

机构地区：[1]贵州理工学院矿业工程学院,贵州贵阳550003 [2]长沙矿山研究院有限责任公司,湖南长沙410012 [3]国家金属采矿工程技术研究中心,湖南长沙410012

出　　处：《矿产保护与利用》2017年第4期16-19,共4页Conservation and Utilization of Mineral Resources

基　　金：“十二五”国家科技支撑计划项目(2013BAB02B04)

摘　　要：为了改善极细颗粒尾砂单独作为充填集料的胶结充填体固结硬化速度慢、强度偏低等问题,通过添加碎石的方法改变充填骨料的级配组成,由实验室对比试验可知,添加一定量碎石的胶结充填体强度可显著提高,这一点也由形式为指数函数拟合曲线的增长规律得以验证,从而确定了添加碎石可为井下开采作业提供可靠的安全保障,从减少胶凝材料用量的角度来看,节省的成本足以抵消加工碎石而增加的费用。因此,采用改性后的碎石-全尾砂充填材料在技术经济方面是合理的。In order to facilitate the issues of slow consolidation and low strength using extremely fine particle tailings as filling aggregate, the compositions of aggregate were optimized by adding ap-propriate gravel. The laboratory tests showed that the addition of gravel could significantly improve the filling body strength, which was also verified from the growth law of exponential function of the fitting curve. Moreover, the addition of gravel could provide reliable security for underground min-ing operations, and the reduction of cementitious materials could make up for the additional cost of preparing gravel. Therefore, using modified gravel - full tailings filling material is reasonable in both technical and economic aspects.

关 键 词：碎石 极细颗粒尾砂 颗粒级配 胶结充填 

分 类 号：TD853.343[矿业工程—金属矿开采]