Advances in Research

This paper introduces the basic principle of geomechanical model test, and analyzes its research status. Some new test technologies have been applied in geomechanical model tests, using infrared thermal imaging technology as the measurement method of geomechanical model tests, and using 3D printing technology to design and manufacture model similar materials. The advantages and disadvantages of the geomechanical model are studied and analyzed. Its advantages are that it can better simulate the construction process of the project, as well as the action mode and time effect of the load, and can study the whole process of the stress of the project, from elasticity to plasticity, to failure. The disadvantage is that relatively complex test technology and special test equipment are required, and similar conditions are generally difficult to meet. In order to explore the similarity of materials and the influence of rock mass with different properties, materials with low elastic modulus, medium elastic modulus and high elastic modulus were prepared and simulated Through the experimental results, the composition and preparation method of rock mass model material are determined, and it is concluded that cement, paraffin and oil are the controlling factors affecting the deformation characteristics of high, medium and low performance rock mass model material. This provides a theoretical basis for the problem that the similarity conditions of model materials are generally difficult to meet.