铁晶砂胶结类岩石材料的参数敏感性分析

为了得到高重度、低强度、低模量的岩石相似材料模型,采用正交试验设计的方法对铁晶砂胶结类岩石试样材料参数进行敏感性分析。以骨料含量,铁粉:重晶石粉,(铁粉+重晶石粉):粗石英:细石英以及水泥:石膏为4因素3水平,相应设计了9组不同材料的配比方案对胶结试样进行研究。通过单轴压缩试验得到不同配合比材料岩样的单轴抗压强度、弹性模量和峰值应变等力学参数。利用极差分析,得到以下结果:(铁粉+重晶石粉):粗石英:细石英对人工制备岩样的密度和弹性模量有较显著影响;骨料含量对岩样的单轴抗压强度有较显著影响;铁粉:重晶石粉对岩样的峰值应变有较显著影响;其他因素的影响不是很明显。

Material Parameters Sensitivity analysis of Rock-Like sample With Iron Crystal Sand

In order to get the similar material rock model with high gravity, low strength and low modulus, the method of orthogonal experimental is used to analyze the material parameters sensitivity of rock-like sample with iron crystal sand. The percentage of aggregate content, the weight ratio of iron powder to barite powder, the weight ratio of iron powder plus barite powder to quartz sand with coarse particle and fine particle and the weight ratio of cement to plaster are selected as four-factor, three-level. Nine sets of material proportion plans are designed. Through weight, measure and uniaxial compression test, the parameters of density, compressive strength, elastic modulus and peak strain are obtained.. The range analysis is used to analyze the sensitivity of various factors. The results show that:the weight ratio of iron powder plus barite powder to quartz sand with coarse particle and fine particle mainly influences density and elastic modulus; the percentage of aggregate content mainly influences compressive strength; the weight ratio of iron to barite powder mainly influences peak strain; The influence of other factors is not obvious.