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.
Key words
iron tailing /
triaxial test /
dynamic modulus /
gradation
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