含硫铜矿尾矿料的工程力学特性试验研究  

Experimental study on mechanical characteristics of copper tailing materials with sulfur content

作　　者：刘庭发[1] 张鹏伟[1] 胡黎明[1] 

机构地区：[1]水沙科学与水利水电工程国家重点实验室清华大学水利水电工程系,北京100084

出　　处：《岩土工程学报》2013年第S1期166-169,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家重点基础研究发展计划(973)课题(2012CB719804)

摘　　要：我国尾矿料的分布范围广,尾矿库库容需求巨大。尾矿料的物理力学性质受矿物类型、生产处理工艺、堆积条件及外部环境等因素影响很大,正确认识尾矿料的物理力学性质、科学选用相关指标是尾矿库设计和施工过程中的关键步骤。以我国西北某在建铜矿尾矿库为例,通过对高硫和低硫两种尾矿料进行化学分析和材料性质试验,得到两种尾矿料的比重、渗透系数、强度、固结系数等物理力学性质指标;并分析比较毛细饱和法和饱和土膏法两种制样方法对尾矿料渗透及强度特性的影响。结果表明,烘干、煮沸等试验处理手段会对尾矿的化学成分产生一定的影响;与毛细饱和方法相比,采用饱和土膏法测得的渗透系数低2~5倍,而抗剪强度平均高出25%,验证了制样方法对材料试验结果的影响。试验结果为尾矿坝的设计及其稳定性评价提供基础数据,也为研究尾矿料的工程力学特性等提供了详实资料。There is a huge demand for tailing ponds in China due to the vast distribution of tailing materials.The physical and mechanical properties of tailing materials are strongly affected by mineral component,treating process,depositing method and external surroundings,leading to significant difficulties in choosing the basic property index of tailing materials.Two types of tailing materials with high and low sulfur contents,obtained from an under-construction tailing pond in western China are tested,and the physical and mechanical properties,including specific gravity,hydraulic conductivity,shear strength or consolidation parameters,are measured.The effect of two saturating methods,capillary saturation method and soil-boiling method,on the mechanical characteristics is investigated through laboratory experiments.The results show that stoving or boiling will change the component of tailing materials.The hydraulic conductivities of capillary saturation samples are two to five times those of the samples saturated by the soil-boiling method,while the shear strength is lower by 25%.This study leads to a better understanding of tailing materials and provides fundamental data for the design and construction of tailing ponds.

关 键 词：含硫尾矿 饱和土膏法 毛细饱和法 抗剪强度 尾矿库 

分 类 号：TV41[水利工程—水工结构工程]