基于正交试验的全尾砂胶结充填材料配比优化  

Ratio Optimization of Unclassified Tailings Cemented Backfill Material Based on Orthogonal Experiment

作　　者：杨磊[1] 王静波 邱景平[1] 邢军[1] 孙晓刚[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]河北金厂峪矿业有限责任公司,河北迁西064307

出　　处：《矿产保护与利用》2017年第3期21-25,共5页Conservation and Utilization of Mineral Resources

基　　金："十二五"国家科技支撑计划项目(2011BAB07B02;2012BAJ17B01;2012BAJ17B02)

摘　　要：以某矿山全尾砂为骨料、水泥和粉煤灰为胶凝材料制作胶结充填材料,采用正交试验探讨了料浆质量浓度、灰砂比和掺灰量对充填材料泌水率、7 d和28 d抗压强度的影响程度,并确定了最佳的全尾砂胶结充填材料配比方案。研究结果表明:料浆质量浓度是影响充填料浆泌水率的主要因素,料浆质量浓度为71%和74%时泌水率小于15%可满足工艺要求;灰砂比对充填材料7 d和28 d抗压强度的影响最大,掺灰量次之,料浆质量浓度最小;确定的最佳配比方案为料浆质量浓度74%、灰砂比1∶4、掺灰量10%。Cemented tailings backfill material was produced by taking unclassified tailings as filling aggregate, and ordinary portland cement and fly ash as cementing agent. The effects of cement - tailing ratio, slurry mass fraction, and proportion of fly ash on slurry ~s bleeding rate and backfill strength of 7 and 28 days were discussed by orthogonal tests. Consequently, the optimal ratio of un- classified tailings cemented backfill material was determined. The results showed that slurry mass fraction was the major factor affecting its bleeding rate. When slurry mass fraction was 71% or 74%, the bleeding rate was less than 15% and could meet the requirement of mining. The order of the influence degree on 7 and 28 days strength from highest to lowest was cement - tailing ratio, proportion of flay ash and slurry mass fraction. The optimal matching scheme of unclassified tailings cemented backfill material was slurry mass fraction of 74%, cement - tailing ratio of 1 ： 4, and proportion of fly ash of 10%.

关 键 词：充填采矿法 全尾砂胶结充填材料 配比优化 正交试验 

分 类 号：TD853.343[矿业工程—金属矿开采]