Three-way load large-scale three-dimensional analog simulation test system

Abstract

The invention discloses a three-way load large-scale three-dimensional analog simulation test system. The system comprises a test piece box and a counter-force system. The test piece box can change into different sizes through the flexible arrangement of a screw hole belt, different testing requirements are met, and the counter-force system comprises a concrete counter-force pool which is located under the ground and a counter-force which is fixed with the counter-force pool. According to the system, complex distribution phenomena of coal seam stress in different moving stages of top plates during underground mining can be simulated, the method is convenient to produce high inclination-angle ledge test pieces, the effect is good, during the overall mining process, rock mass exists under the condition of three-dimensional stress, underground space excavation under multiple working conditions can be studied, the height of the whole system above the ground surface is reduced, the construction cost is low, and the system is stable.

Description

technical field [0001] The invention relates to a simulation test system, in particular to a similar simulation test system for studying stress distribution of ore mass and rock mass. Background technique [0002] Similar material simulation test is a laboratory research method based on similarity theory and dimensional analysis, and is widely used in water conservancy, mining, geology, railway and other departments. The biggest feature of the simulation test is that the test conditions can be controlled and changed artificially, so as to determine the law of the influence of single or multiple factors on the mine pressure. The test effect is clear and intuitive, and the test period is short and the effect is quick. It has played an important role in the research of mining science. Huge effect. Even with the rapid development of numerical simulation and computing science of rock mechanics, similar material simulation test is still an irreplaceable research method in mining ...

AI Technical Summary

Problems solved by technology

[0004] Although the three-dimensional similar simulation test system in the prior art has deepened the progress of underground excavation engineering research to a certain extent, it has the following deficiencies: 1) The model size is small, and the geometric ratio will be very small when doing simulation tests. In practice, it is found that the geometric ratio of the model test is too small to reflect the impact of excavation; 2) The size of the model is fixed and cannot be adjusted, which will cause sometimes the geometric ratio is too small, and sometimes it will lead to too much waste of space Material; 3) The direction of force is single, and it is difficult to achieve three-dimensional loading; 4) Most rock mass deformation monitoring uses strain gauges, and the data collection of rock mass deformation is not accurate enough; 5) The test piece box must be opened manually after the mine excavation , which will cause an unloading effect, which is inconsistent with the actual working conditions; 6) The process of loading the device is basically carried by hand, which is inconvenient to operate; 7) Most of the applied stress loading systems are manual, so the stress loading process cannot maintain a uniform speed, And its accuracy cannot be guaranteed. In addition, loading forms such as cyclic loading cannot achieve

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