Optimization of Mix Proportion for Similar Materials of Deep Iron Ore

Abstract

Since most iron ores are buried underground and costly, similar materials play an important role in model tests. To meet the demand for similar materials in simulation tests such as iron ore mining, similar materials for iron ore were prepared using quartz sand and iron powder as aggregates, and cement and gypsum as binders. The orthogonal test design method was adopted, with four influencing factors selected: cement content, quartz sand content, iron powder content and gypsum content, and each factor was set at four levels. Through weighing and uniaxial compression tests under 16 different mix proportions, three physical and mechanical property indexes of the materials under different mix proportions, namely density, compressive strength and longitudinal wave velocity, were obtained, which satisfy the simulation requirements of iron ore in similar model tests.