结合大型地下洞室群地震模拟振动台模型试验研究，根据相似原理，利用正交试验和二次细化试验相结合的试验方法，对岩体相似材料进行配比试验。选用铁精粉、重晶石粉和石英砂作为骨料，石膏为胶凝材料，甘油为调节剂。正交试验以相似材料的密度、抗压强度和变形模量为控制指标，通过极差分析得到各影响因素的重要程度，并在此基础上进行二次细化试验，二次细化试验增加测试相似材料的抗拉强度。这种组合试验方法可通过较少的试验次数得到符合相似指标要求的材料配比，大大提高了配比试验的效率。试验得出的相似材料配比与物理力学指标的变化规律及运用组合试验高效确定具体配比的方法，对类似工程动静力模型试验相似材料模拟具有一定的参考意义。

This paper is based on the findings of shaking table test of underground caverns and the similarity principle. Proportioning tests of similar materials of surrounding rock are performed by taking advantages of the combination of orthogonal experiment and secondary refinement test. Iron ore powder, barite powder and quartz sand are the main materials. Gypsum powder is glue. Glycerin is regulator. The density, compressive strength and deformation modulus of the similar materials are chosen as the four control indicators in the orthogonal experiment. The importance of each factor is obtained using polar difference analysis method. The design of the secondary refining experiment is decided with the orthogonal experiment results. Tensile strength is additionally tested in the secondary refining experiment. The similar materials that satisfy the similar relationship can be developed efficiently with the combining test methods. The variation between the proportion of similar material and the physical parameters and the efficient method of combination test can offer a reference to model test of the similar project in which proportioning test of similar material is also required.