细颗粒尾砂含量对充填体强度影响的试验研究
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摘要
为探究细颗粒尾砂含量对充填体强度特性的影响,利用液压伺服试验系统进行充填体单轴抗压强度试验,分析细颗粒尾砂含量、水泥含量和料浆浓度对充填体强度的影响规律。结果表明:细颗粒尾砂含量对充填体强度存在一定影响,充填体强度影响因素敏感性顺序为水泥含量、料浆浓度和细颗粒尾砂含量;各因素之间存在交互作用,水泥含量和料浆浓度一定时,细颗粒尾砂含量在35%～50%范围时,充填体强度最大;当水泥含量高于15%,料浆浓度高于72%后,充填体强度急剧上升。推荐矿山在充填过程中使细颗粒尾砂含量处于50%左右,同时提高浓度,降低水泥用量,可降低充填成本,增加企业经济效益。
In order to explore the effect of fine particle tailings content on the strength characteristics of filling body,the uniaxial compressive strength test of the filling body was performed using a hydraulic servo test system.The influences of fine particle tailings content,cement content and slurry concentration on the strength of filling body were analyzed.The results showed that the fine particle tailings content had a certain influence on the strength of filling body.The sensitivity of the factors affecting the backfilling strength was ordered as follows,the cement content,the slurry concentration and the fine particle tailings content.There were interactions between various factors.When the cement content and slurry concentration were constant,the strength of the filling body was the highest as the fine particle tailings content within the range of 35%to 50%.And the strength of the filling body increased rapidly when the cement content was above 15% and the slurry concentration was above 72%.It was recommended that the fine particle tailings content should be kept at approximately 50%during the filling process,at the same time,increasing the slurry concentration and decreasing the cement consumption could reduce the cost and increase the economic efficiency of the enterprise.
In order to explore the effect of fine particle tailings content on the strength characteristics of filling body,the uniaxial compressive strength test of the filling body was performed using a hydraulic servo test system.The influences of fine particle tailings content,cement content and slurry concentration on the strength of filling body were analyzed.The results showed that the fine particle tailings content had a certain influence on the strength of filling body.The sensitivity of the factors affecting the backfilling strength was ordered as follows,the cement content,the slurry concentration and the fine particle tailings content.There were interactions between various factors.When the cement content and slurry concentration were constant,the strength of the filling body was the highest as the fine particle tailings content within the range of 35%to 50%.And the strength of the filling body increased rapidly when the cement content was above 15% and the slurry concentration was above 72%.It was recommended that the fine particle tailings content should be kept at approximately 50%during the filling process,at the same time,increasing the slurry concentration and decreasing the cement consumption could reduce the cost and increase the economic efficiency of the enterprise.
引文
[1]谢和平.“深部岩体力学与开采理论”研究构想与预期成果展望[J].工程科学与技术,2017,49(2):1-16.
[2]Mamadou Fall,Mukesh Pokharel.Coupled effects of sulphate and temperature on the strength development of cemented tailings backfills:Portland cement-paste backfill[J].Cement&Concrete Composites,2010(32):819-828.
[3]Pokharel M,Fall M.Combined influence of sulphate and temperature on the saturated hydraulic conductivity of hardened cemented paste backfill[J].Cement&Concrete Composites,2013(38):21-28.
[4]Fall M,Samb S S.Effect of high temperature on strength and microstructural properties of cemented paste backfill[J].Fire Safety Journal,2009(44):642-651.
[5]Aldhafeeri Z,Fall M,Pokhare M,et al.Temperature dependence of the reactivity of cemented paste backfill[J].Applied Geochemistry,2016(72):10-19.
[6]赵国彦,周礼,马举,等.低温高寒环境下尾砂胶结充填体强度特性研究[J].矿冶工程,2013,33(3):24-26+30.
[7]刘超,韩斌,孙伟,等.高寒地区废石破碎胶结充填体强度特性试验研究与工业应用[J].岩石力学与工程学报,2015,34(1):139-147.
[8]李茂辉,杨志强,王有团,等.粉煤灰复合胶凝材料充填体强度与水化机理研究[J].中国矿业大学学报,2015,44(4):650-655+695.
[9]杨超,郭利杰,彭威,等.矿用充填胶凝材料与尾砂适应性试验研究[J].中国矿业,2014,23(S1):185-189.
[10]李红,吴爱祥,韩斌,等.新型胶凝材料对充填体强度的影响[J].金属矿山,2016(1):8-12.
[11]孙光华,魏莎莎,苏东良.基于正交试验的全尾砂胶结充填配比方案优化[J].金属矿山,2015(4):111-113.
[12]李欣,郭利杰,许文远.某铁矿全尾砂胶结充填材料配比试验研究[J].中国矿业,2016,25(S2):294-298.
[13]甘德清,韩亮,刘志义,等.尾砂粒级组成对充填体强度特性影响的试验研究[J].化工矿物与加工,2017,46(4):57-61.
[14]汪海萍,谭玉叶,吴姗,等.尾砂级配对充填体强度的影响及优化[J].有色金属(矿山部分),2014,66(4):26-30.
[2]Mamadou Fall,Mukesh Pokharel.Coupled effects of sulphate and temperature on the strength development of cemented tailings backfills:Portland cement-paste backfill[J].Cement&Concrete Composites,2010(32):819-828.
[3]Pokharel M,Fall M.Combined influence of sulphate and temperature on the saturated hydraulic conductivity of hardened cemented paste backfill[J].Cement&Concrete Composites,2013(38):21-28.
[4]Fall M,Samb S S.Effect of high temperature on strength and microstructural properties of cemented paste backfill[J].Fire Safety Journal,2009(44):642-651.
[5]Aldhafeeri Z,Fall M,Pokhare M,et al.Temperature dependence of the reactivity of cemented paste backfill[J].Applied Geochemistry,2016(72):10-19.
[6]赵国彦,周礼,马举,等.低温高寒环境下尾砂胶结充填体强度特性研究[J].矿冶工程,2013,33(3):24-26+30.
[7]刘超,韩斌,孙伟,等.高寒地区废石破碎胶结充填体强度特性试验研究与工业应用[J].岩石力学与工程学报,2015,34(1):139-147.
[8]李茂辉,杨志强,王有团,等.粉煤灰复合胶凝材料充填体强度与水化机理研究[J].中国矿业大学学报,2015,44(4):650-655+695.
[9]杨超,郭利杰,彭威,等.矿用充填胶凝材料与尾砂适应性试验研究[J].中国矿业,2014,23(S1):185-189.
[10]李红,吴爱祥,韩斌,等.新型胶凝材料对充填体强度的影响[J].金属矿山,2016(1):8-12.
[11]孙光华,魏莎莎,苏东良.基于正交试验的全尾砂胶结充填配比方案优化[J].金属矿山,2015(4):111-113.
[12]李欣,郭利杰,许文远.某铁矿全尾砂胶结充填材料配比试验研究[J].中国矿业,2016,25(S2):294-298.
[13]甘德清,韩亮,刘志义,等.尾砂粒级组成对充填体强度特性影响的试验研究[J].化工矿物与加工,2017,46(4):57-61.
[14]汪海萍,谭玉叶,吴姗,等.尾砂级配对充填体强度的影响及优化[J].有色金属(矿山部分),2014,66(4):26-30.