摘要
通过室内小型振动台模型试验,对船载红土镍矿的流态化特性进行了研究。基于数字图像采集和分析,揭示了红土镍矿流态化的演化过程。分析了含水率、加速度等因素对红土镍矿流态化特性的影响以及孔隙水压力和含水率在流态化过程中的变化规律。试验结果表明:水分迁移是造成红土镍矿形成流态化的主要原因;含水率是影响红土镍矿流态化发生的关键因素,建议实际运输中控制与本试验相同的红土镍矿含水率在31.0%以下;加速度大于某一临界值时,加速度对红土镍矿流态化特性才有较大影响。研究对减少红土镍矿在船运过程中流态化风险有重要的意义。
By means of shaking table tests, the fluidization characteristics of laterite nickel ore in bulk under dynamic loading are investigated. With the help of digital image capture and processing technology, the phenomenon of fluidization evolution is revealed. The effect of different influencing factors such as moisture content, acceleration and the change law of pore water pressure and moisture content in the process of fluidization are analyzed. The test results show that the moisture migration is the main cause for fluidization of laterite nickel ore. The fluidization of laterite nickel ore is mostly influenced by the moisture content, and it is suggested that the moisture content of laterite nickel ore used in the test should be below 31.0% in practical transport. Only when the acceleration is greater than a certain critical value, the acceleration has great influence on the fluidization characteristics of laterite nickel ore. This study is of important significance in reducing risk for laterite nickel ore in the shipping process.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2014年第8期1515-1520,共6页
Chinese Journal of Geotechnical Engineering
基金
国家重点基础研究发展计划(973计划)项目(2012CB723804)
关键词
流态化
小型振动台试验
红土镍矿
fluidization
shaking table test
laterite nickel ore
