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Three-directionally-loaded large-scale three-dimensional similarity simulation test method

A technology similar to simulation and test methods, applied in soil material testing, material inspection products, preparation of test samples, etc., can solve problems such as difficult to achieve three-dimensional loading, inconvenient operation, and accuracy cannot be guaranteed

Inactive Publication Date: 2013-01-09
CHONGQING UNIV
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  • Abstract
  • Description
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  • Application Information

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 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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  • Three-directionally-loaded large-scale three-dimensional similarity simulation test method

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Embodiment Construction

[0074] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0075] Such as Figure 1 to Figure 16 As shown, a three-dimensional loading large-scale three-dimensional similar simulation test system, including a test piece box and a reaction system. The test piece box includes a base 1, and the edge of the base 1 is provided with a left screw hole band 13, a right screw hole band 14, a front screw hole band 15 and a rear screw hole band 16 forming a square. The base 1 is fixedly connected with the left side plate 3 at the left screw hole band 13 by bolts, and is fixedly connected with the front side plate 5 at the front screw hole band 15 by bolts.

[0076] Between the right screw hole band 14 and the left screw hole band 13, two first middle screw hole bands 17 are arranged, and two screw hole bands respectively connected with the first middle screw hole bands are arranged between the rear screw hole band 16 and the f...

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Abstract

The invention discloses a three-dimensional similarity simulation test method including the steps: A, test-piece preparation; B, loading; and C, excavation and observation. By the method, complex distribution phenomena of coal bed stress in different roof movement phases during underground excavation can be simulated, and large-inclination-angle ore bed test pieces can be manufactured more conveniently and effectively, so that rock masses can be guaranteed to be under the three-directional stress condition in the whole excavation process, underground space excavation under more working conditions can be studied, the height on the earth surface of a whole system is decreased, construction cost is lower, and the system is more stable.

Description

technical field [0001] The invention relates to a similar simulation test method 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 science research. It complements the increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N1/28
Inventor 尹光志许江蒋长宝王维忠黄滚彭守建姚俊伟李生舟刘东李文璞李铭辉
Owner CHONGQING UNIV
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