为研究级配铁尾矿石的动态性能，根据级配碎石设计推荐的级配范围，选择两种级配类型（连续密实型和骨架密实型）进行了铁尾矿石的级配组成设计，并采用动三轴试验得到其动态回弹模量.试验结果表明，与级配碎石相同，级配铁尾矿石的动态回弹模量与应力状态呈非线性关系，可采用模型表征.由级配尾矿石所在结构层的受力状态，并应用该模型确定的动态模量值表明，骨架密实型优于连续密实型，但两者的动态回弹模量值均能够满足设计使用要求.
Abstract
To analyze dynamic behaviors of graded iron tailing, two gradations( continuity tightness and framework tightness) are chosen for gradation composition design based on the recommended range of graded gravel in China, and furthermore triaxial test is performed to obtain dynamic modulus of graded iron tailing. Results show that graded iron tailing represent nonlinear relationship between dynamic modulus and stress state, which has better consistency with graded gravel, and model can be used to express the relationship. Framework tightness is superior to continuity tightness according to stress characteristics of structure layer and dynamic modulus derived from the model, whereas dynamic modulus of two gradations of iron tailing can satisfy the design requirement.
关键词
铁尾矿石 /
三轴试验 /
动态回弹模量 /
级配
Key words
iron tailing /
triaxial test /
dynamic modulus /
gradation
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基金
辽宁省交通重点科技项目（201101）;中央高校基本科研项目(3132013315).
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