【摘要】 为了配置适合砂质泥岩力学特性的相似材料，采用精铁粉和石英砂作为骨料，石膏作为胶结剂，设计了一种新型地质力学模型试验材料——“IQG”相似材料(I代表铁粉，Q代表石英砂，G代表石膏),并进行了敏感性分析；同时为了提高相似材料配比的调配效率，提出了基于应力-应变曲线相似性来获取合理配比的“曲线拟合配比法”。研究结果表明：“IQG”材料不仅满足砂质泥岩力学特性的试验要求，也适用于多种围岩材料的试验需求；曲线拟合配比法简便、准确且高效，只需进行单轴受压试验即可有效达成目标；“IQG”材料中石膏含量对应力-应变曲线的峰值应力、峰值应变和弹性模量影响最大，其次是水含量和骨料比；在应力-应变曲线拟合参数的敏感性分析中，石膏仍是最主要的影响因素，其次为骨料比和水含量。研究成果可为地质力学模型试验相似材料的研发与优化提供重要参考。更多还原

【Abstract】 In order to develop a material that mimics the mechanical properties of sandy mudstone, a new geomechanical model material, named “IQG similar material”(with iron powder and quartz sand as aggregates, and gypsum as a binder) was designed, and a sensitivity analysis was conducted.Additionally, to improve the efficiency of determining the material mix ratio, a “curve fitting method” based on stress-strain curve similarity was proposed to give an optimal proportion.The results showed that the “IQG” material not only met the mechanical test requirements for simulating sandy mudstone but was also were suitable for testing various surrounding rock materials.The curve fitting method is proved to be simple, accurate, and efficient, as it only requires uniaxial compression tests to achieve the desired outcome.Among the factors influencing the “IQG” material, gypsum content had the greatest effect on the peak stress, peak strain, and elastic modulus of the stress-strain curve, followed by water content and the aggregate ratio.In the analysis of stress-strain curve fitting parameters, gypsum remained the most significant factor, followed by the aggregate ratio and water content.The findings of this study can serve as an important reference for the development and optimization of similar materials used in geomechanical model tests.更多还原