Large-scale three-dimensional similar simulation test system combining three-way loading with fixed-point dynamic load

Abstract

The invention discloses a large-scale three-dimensional similar simulation test system combining three-way loading with a fixed-point dynamic load. The system comprises a test piece box and a counterforce system. The test piece box includes a base, a left screw hole belt, a right screw hole belt, a front screw hole belt, a rear screw hole belt, a left side plate, a front side plate, a first intermediate screw hole belt, a second intermediate screw hole belt, a right side plate, and a rear side plate. The counter force system includes a counter force pool, left static load loading hydraulic cylinders, front static load loading hydraulic cylinders, and upper static load loading hydraulic cylinders; a left dynamic load loading hydraulic cylinder is arranged right below each column of the left static load loading hydraulic cylinders and is fixed at a lateral force-bearing rack; a front dynamic load loading hydraulic cylinder is arranged right below each column of the front static load loading hydraulic cylinders and is fixed at a front standing column. On the basis of the improvement of the existing three-direction loaded large-scale three-dimensional similar simulation test system, the modification cost is low, the dynamic load loading hydraulic cylinder is arranged at an ingenious position, and the simulation test effect is ideal.

Description

technical field [0001] The invention relates to a three-dimensional similar simulation test system, in particular to a similar simulation test system for studying the stress distribution of ore mass and rock mass. Background technique [0002] my country is one of the major countries in the world whose primary energy is dominated by coal, and coal, as the main energy, accounts for about 70% of the primary energy production and consumption structure. In recent years, thanks to the adjustment of my country's energy structure, the proportion of coal in the primary energy structure has slightly declined, but the overall output remains at a high level. Coal is mainly supplied by underground mining, and the associated mine geological disasters have always been a difficult problem restricting the safety of coal mine production. Therefore, it is of great significance to study the mechanical and deformation characteristics of the underground coal seam mining process under the action...

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Problems solved by technology

However, during the simulation test, it was found that the system cannot realize the experimental research on the deformation and fracture law of the formation under the impact load, that is, it cannot combine the dynamic load with the static load, and there are certain limitations. Therefore, a system that can realize the static load The model test system loaded together with the dynamic load has become one of the key technical problems that need to be solved urgently

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