铁矿床物理模型相似材料正交配比试验

发布时间：2018-07-31 09:20

【摘要】：以河砂、碳酸钙、石膏和重晶石为相似材料,应用正交设计方法,以骨料质量与胶结材料质量比、碳酸钙质量与石膏质量比、重晶石粉质量与骨料质量比为控制因素,制定了三因素五水平的试验方案。通过室内力学试验,在获取不同方案的密度、抗压强度、弹性模量等力学指标测试的基础上,分析了力学指标影响因素,得出了相似材料配比与力学指标关系方程。结果表明:重晶石含量对相似材料密度起控制作用;抗压强度力学指标主控因素是骨料质量与胶结材料质量比;相似材料的弹性模量力学指标受骨料质量与胶结材料质量比影响最大,其次为重晶石含量,受碳酸钙质量与石膏质量比影响最小。采用MATLAB程序进行多元线形回归得出,相似材料配比与力学指标关系方程可用于相似材料模型试验配比的确定。
[Abstract]:Taking river sand, calcium carbonate, gypsum and barite as similar materials, the orthogonal design method was used to control the ratio of aggregate mass to cementing material, calcium carbonate to gypsum mass, barite powder mass to aggregate mass. The experimental scheme of three factors and five levels was established. On the basis of obtaining the density, compressive strength, elastic modulus and other mechanical indexes of different schemes, the influencing factors of mechanical indexes were analyzed, and the equation of the relationship between the ratio of similar materials and the mechanical indexes was obtained. The results show that the content of barite plays an important role in controlling the density of similar materials, and the main control factor of compressive strength is the ratio of aggregate mass to cemented material. The mechanical index of elastic modulus of the similar materials is mostly affected by the ratio of aggregate mass to cemented material, followed by the barite content, and the effect of calcium carbonate mass to gypsum mass ratio is the least. The equation of the relationship between the ratio of similar materials and the mechanical index can be used to determine the ratio of similar materials in model tests.
【作者单位】：华北理工大学矿业工程学院;河北省矿业开发与安全技术实验室;华北理工大学轻工学院;
【基金】：河北省自然科学基金项目(E2014209093)
【分类号】：TD31

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