离子型稀土堆浸场地复合土壤固化剂正交实验研究  

Orthogonal test of compound soil curing agents in ionic rare-earth heap leaching sites

作　　者：陈飞[1,2] 张仕彬 谢蕴忠 王俊峰[1] CHEN Fei;ZHANG Shibin;XIE Yunzhong;WANG Junfeng(School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Jiangxi Key Laboratory of Mining Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西理工大学资源与环境工程学院 [2]江西理工大学江西省矿业工程重点实验室,江西赣州341000

出　　处：《有色金属科学与工程》2023年第6期887-894,共8页Nonferrous Metals Science and Engineering

基　　金：国家重点研发专项资助项目(2019YFC1805101);江西省研究生创新专项资金项目(YC2022-S663)。

摘　　要：为解决离子型稀土堆浸场地边坡土壤稳定问题,研发新型环保土壤固化剂,对减少离子型稀土堆浸场地水土流失,稳定矿山边坡具有重要意义。采用3因素3水平的正交实验方法,设计了9组不同质量配比的复合土壤固化剂实验方案,并进行室内直剪实验测试加固土的抗剪强度,对直剪实验结果进行极差分析和方差分析。结果表明:复合土壤固化剂中硅酸盐水泥对提高固化土的黏聚力贡献最大,其次为水性聚氨酯和膨润土;膨润土在改善固化土内摩擦角方面优于硅酸盐水泥和水性聚氨酯。综合分析结果,对于离子型稀土堆浸场地,复合土壤固化剂以膨润土∶碳酸氢钠∶水性聚氨酯∶硅酸盐水泥∶水=10∶1∶10∶20∶100的质量配比可以达到良好的固化效果和经济效益。To solve the problem of slope soil stability at ion-type rare earth heap leaching sites,the research and development of a new environmentally friendly soil curing agent is of great significance to reduce soil erosion in ion-type rare earth heap leaching sites and stabilize the mine slope.With the orthogonal test method of three factors and three levels,nine groups of composite soil solidifier test schemes with different mass proportions were designed,and the indoor direct shear test was carried out to test the shear strength of the consolidated soil.The range analysis and variance analysis were carried out on such test results.The final results showed that among the composite soil curing agents,Portland cement could best improve the cohesion of solidified soil,compared with waterborne polyurethane and bentonite;bentonite could be superior to Portland cement and waterborne polyurethane in improving internal friction angle of solidified soil.Comprehensive analysis of the results indicates that when the mass ratio of bentonite∶sodium bicarbonate∶aqueous polyurethane∶Portland cement∶water is 10∶1∶10∶20∶100,the composite soil curing agent has a good curing effect and economic benefits for the ion-type rare earth heap leaching sites.

关 键 词：离子型稀土尾矿 复合土壤固化剂 正交实验 直剪实验 固化机理 

分 类 号：TU411.7[建筑科学—岩土工程] TD315.3[建筑科学—土工工程]