红土镍矿流态化特性的模型试验研究

发布时间：2018-06-23 17:13

本文选题：流态化 + 小型振动台试验　；参考：《岩土工程学报》2014年08期

【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。
[Abstract]:The fluidization characteristics of shipborne laterite nickel ore were studied by laboratory small shaking table model test. Based on digital image acquisition and analysis, the evolution process of laterite nickel ore fluidization is revealed. The influence of water content and acceleration on fluidization characteristics of laterite nickel ore and the variation of pore water pressure and water content in fluidization process were analyzed. The results show that water migration is the main reason for fluidization of laterite nickel ores, and moisture content is the key factor affecting fluidization of laterite nickel ores. It is suggested that the moisture content of laterite nickel ore should be controlled below 31.0% in actual transportation, and when the acceleration is greater than a certain critical value, the acceleration will have a great effect on the fluidization characteristics of laterite nickel ore. The study is of great significance to reduce the fluidization risk of laterite nickel ore during shipping.
【作者单位】：同济大学地下建筑与工程系;同济大学岩土及地下工程教育部重点实验室;上海船舶运输科学研究所;
【基金】：国家重点基础研究发展计划(973计划)项目(2012CB723804)
【分类号】：TU411

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