Study of Similar Materials of Deep Buried Hard Rock Based on Dimensional Analysis

In order to obtain a similar model of deeply buried limestone with rock burst propensity, the rock burst similarity criterion is established based on the principle of rock burst energy based on the magnitude analysis method, and the relevant parameters of the rough rock are estimated by referring to the relevant parameters of the proto rock and the similarity criterion of the rock burst. The rock burst propensity index, elastic properties and dissipation energy were introduced, and the orthogonal test scheme of 4 factors and 5 levels as adopted based on the quartz powder content, barite powder content, gypsum cement mass ratio and water content, and the uniaxial compressive test was carried out to obtain various parameters. The sensitivity analysis of the test results was carried out and the preferred specimens were carried out in the secondary optimization test to improve the proportion, and the parameter error of the similar model between the specimen and the target was reduced to less than 10%, and the results showed that the error between the similar model and the target similar model after the second optimization was 5%. Moreover, dynamic impact mechanical tests are carried out on optimized specimens with different impact velocities, and the peak stress law accords with the law of limestone dynamic failure, which provided a reference for the indoor study of statics and dynamics in limestone interior.