Fuzzy Optimization Method and its Application Of Similar Material Ratio in 3D Geo-mechanical Model

The similar material plays an important role in geo-mechanical model test and the proportion influences the test results directly. According to the physical and mechanical properties of the prototype, the cementitious material with good elastic-plastic for iron crystal sand ISBM was chosen as the similar material for the research on failure mechanism of surrounding rock under the environment of excavation and high geo-stress in deep tunnel. Three mixing proportions that matched with similar conditions were got from more than 300 groups of matching test.