Three-dimensional loading large-scale three-dimensional similar simulation test specimen box

Abstract

The invention discloses a triaxial-loading large three-dimensional similar simulation test sample box. The sample box is characterized in that a screw hole belt is arranged flexibly, and accordingly the sample box can be changed into different sizes, and different testing requirements are met. Complex distribution of coal seam stress of different top plates in motion stage in downhole digging process can be simulated, ore bed samples at large inclination angles are manufactured more conveniently and effectively, rock mass can be guaranteed to be stored under triaxial stress in the whole mining process, digging of underground space under more work conditions can be researched, height on the whole system surface is lowered, cost is lower, and a system is more stable.

Description

technical field [0001] The invention relates to a test piece box, in particular to a similar simulation test test piece box 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 ...

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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 lead to 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 before excavation of the mine layer , 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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