Three-dimensional multi-coal-seam-mining similar material model experimental system

Abstract

The invention provides a three-dimensional multi-coal-seam-mining similar material model experimental system. The three-dimensional multi-coal-seam-mining similar material model experimental system comprises stand columns, a base plate, a lower-coal-seam filling part, an upper-coal-seam filling part, a first template, second templates and other components in a combined mode. The three-dimensional multi-coal-seam-mining similar material model experimental system is characterized in that when an experiment is carried out through the three-dimensional multi-coal-seam-mining similar material model experimental system, as the coal seam simulating components are flexibly arranged, mining of multiple coal seams can be simulated, and different experimental requirements can be met. The three-dimensional multi-coal-seam-mining similar material model experimental system can simulate complex stress distribution of different coal seams and influences of mining of the upper coal seams on the lower coal seams during underground multi-coal-seam mining, mining of the lower coal seams is simulated by lifting the lower-coal-seam filling part, and the coal seams with different thicknesses can be simulated accordingly; as mining of the upper coal seams is simulated in a pulled-out mode, the coal seam advancing rate can be controlled. Compared with the prior art, the three-dimensional multi-coal-seam-mining similar material model experimental system has the advantages that the structure is simple, the experiment is easy and convenient to operate, and the manufacturing cost is low.

Description

technical field [0001] The patent of the present invention relates to a simulation experiment system for coal seam similar materials, in particular to a three-dimensional multi-coal seam mining similar material model experiment system. 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 calculation science of rock mechanics, similar material simulation test is...

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Problems solved by technology

[0005] 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 excavation of the mine layer must be manually excavated after the test piece box is opened. It will cause an unloading effect, which is inconsistent with the actual working conditions; (2) During the experiment, it is necessary to manually excavate the coal seam with saw blades and other tools, which is labor-intensive and disturbs the overlying rock strata greatly, and the excavation is not accurate; (3) Now With three-dimensional similar materials, only one layer of coal mining can be simulated, and the mining of multi-layer coal cannot be realized, resulting in a waste of experimental equipment, and the mining of multi-layer coal cannot be accurately simulated

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