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. Relying on the specific indoor test data, and the main physical and mechanical parameters of the original rock were taken as the evaluation index system, the improved fuzzy optimization mathematical model of similar material was established. It might help you make your decision in cases where several solutions seem to be able to fit the bill. The optimal proportion of the similar material was got by using the model, and the optimization result was applied to the true 3 d geological mechanical model test for similar material, and simulated successfully the process of excavation in high geo-stress environment deep tunnel. The reappearance of the zonal disintegration phenomena of surrounding rock under excavation in high geo-stress environment deep tunnel of Dingji coal mine.