羊拉铜矿尾矿料动力特性试验研究

以羊拉铜矿尾矿料为研究对象,按照中线法堆坝工艺要求,将羊拉铜矿尾矿砂人工配比成全尾矿、粗尾矿、细尾矿三种尾矿试样.使用DDS-70微机控制电磁式振动三轴仪,对三种尾矿砂试样进行了动强度、动本构关系、动弹模阻尼比三方面动力特性研究.确定了尾矿料的动力强度和动力参数.并探讨了颗粒组成、固结围压、固结压力比、动应力对动强度的影响.为羊拉铜矿尾矿坝在8度地震作用下的稳定性分析提供了基础资料.

Dynamic Properties of Yangla Copper Tailings Material

Tailing sands,coarse tailing sands and fine tailing sands all were prepared by artificial partitioning experimentation in accordance with the requirements of central line damming.DDS-70 electromagnet kinetic equipment was used to study the dynamic strength,stress-strain relationship,dynamic modulus and damping ratio of three tailing sand types.The dynamic strength and parameters were determined,and some influential factors,such as particle composition,confining pressure,consolidated stress ratio and dynamic stress,were discussed.The test results provide basic data for the stability evaluation of the Yangla copper tailing dam under a magnitude 8 earthquake.