海运红土镍矿的动三轴试验研究  

Cyclic tri-axial test research of laterite nickel ore

作　　者：周健[1,2] 朱耀民[1] 简琦薇[1] 贾敏才[1,2] 金允龙[3] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]上海船舶运输科学研究所,上海200135

出　　处：《江苏科技大学学报（自然科学版）》2013年第6期523-527,共5页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家重点基础研究发展计划资助项目(2012CB723804)

摘　　要：利用动三轴仪,对船载散装红土镍矿的动力特性进行了试验研究.通过对振动双幅应变曲线和累积孔隙水压力曲线进行分析,探讨了含水量、动应力、固结度等因素对红土镍矿动力特性的影响.结果表明:含水量是影响红土镍矿动力特性的关键因素,且镍矿存在临界含水量,超过该临界含水量,红土镍矿的动力特性会发生突变;当动应力小于某一临界值时,动应力对镍矿动力特性影响有限;另外增加固结度可以提高红土镍矿的动强度.研究结果可为进一步分析镍矿流态破坏提供理论基础.Tests for onboard laterite nickel ore are carried out to study the dynamic characteristics of nickel ore by cyclic tri-axial test apparatus .Through analyzing the double amplitude strain curve and pore pressure curve , the influence of factors , such as water content , dynamic stress and the degree of consolidation , on dynamic charac-teristics of the nickel ore are discussed .The experimental results show that moisture content is the key factor for the dynamic behavior of the nickel ore .The nickel ore has critical water content , more than which the dynamic characteristics of the laterite nickel ore will mutate .When the dynamic stress is less than a certain critical value , the influence of dynamic stress on the dynamic characteristics of nickel is limited .The increase of the degree of consolidation can improve the dynamic strength .This study will provide a theoretical basis for further analysis of nickel ore flow damage .

关 键 词：动三轴试验 红土镍矿 动应变 临界含水量 

分 类 号：TU449[建筑科学—岩土工程]