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Coal rock three-dimensional strain field visualization system and method under mining influence

A technology of mining influence and strain field, applied in the direction of mechanical device, design optimization/simulation, special data processing application, etc., can solve the problems of damage model integrity, error, large error, etc.

Pending Publication Date: 2020-10-23
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional similar simulation experiment, it is impossible to observe the internal strain field distribution of the material intuitively, and to observe the internal strain by indirect measurement method, not only there are large errors, but also the integrity of the model will be destroyed, resulting in unnecessary errors

Method used

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  • Coal rock three-dimensional strain field visualization system and method under mining influence
  • Coal rock three-dimensional strain field visualization system and method under mining influence
  • Coal rock three-dimensional strain field visualization system and method under mining influence

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Embodiment 1

[0041] see Figure 1 to Figure 5 , the present embodiment discloses a visualization system of three-dimensional strain field of coal and rock under the influence of mining, including a stress condition simulation system, a coal seam mining simulation device and a strain monitoring system.

[0042] The stress condition simulation system includes a similar simulation experiment frame 1 , a loading system 2 and a circular slideway 3 .

[0043] The similar simulation experiment frame 1 includes a pressure chamber 101 and two visualization side panels 102 . The pressure chamber 101 is a rectangular frame as a whole. Openings at both ends of the rectangular frame are blocked by the visible side panels 102 . A trachea extension hole 1021 is provided on the surface of the visualization side panel 102 . The pressure chamber 101 and the visualization side plate 102 enclose a chamber for placing similar formation models.

[0044] The loading system 2 includes a vertical axial compres...

Embodiment 2

[0049] see Figure 6 , the embodiment of this city discloses a method for visualizing the three-dimensional strain field of coal and rock under the influence of mining using the system described in embodiment 1, including the following steps:

[0050] 1) Heat and melt the transparent base material and evenly mix it with ink microcapsules to prepare 3D printing filaments.

[0051] 2) Perform 3D printing of the geological structure in the model placement cavity of the stress condition simulation system to obtain a strain visualization similar model.

[0052] 3) Use the stress condition simulation system to simulate the stratum dip, geological structure and gas content. After the model is fixed on the test frame, the test frame can be rotated through the circular slide to adjust the angle to simulate the stratum dip. According to the similarity, a certain pressure of nitrogen is filled into the air bag of the coal seam mining simulation device to simulate the coal seam to be min...

Embodiment 3

[0057] This embodiment discloses a method for visualizing the three-dimensional strain field of coal and rock under the influence of mining in a single coal seam, which includes the following steps:

[0058] 1) Heat and melt the transparent base material and evenly mix it with ink microcapsules to prepare 3D printing filaments. The wall of the ink microcapsule is made of polyurethane material, and the core of the capsule is made of dyed ink. The transparent base material adopts organic silicon resin.

[0059] In this embodiment, the ink microcapsules are synthesized by chemical method. Chemical method, also known as in-situ polymerization method, refers to adjusting the temperature, pH value of the reaction system or adding electrolytes, catalysts and a series of reaction conditions, so that small monomer molecules polymerize to form polymer film-forming materials, and precipitate out of the solution , wrap the core material. In the whole reaction system, the core material ...

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Abstract

The invention provides a coal rock three-dimensional strain field visualization system and method under mining influence. The system comprises a stress condition simulation system and a strain monitoring system. The stress condition simulation system comprises an analog simulation experiment frame, a loading system and a circular slideway. The method comprises the steps of preparing a 3D printingwire rod, printing a strain visualization similar model, simulating a stratum inclination angle and a gas-containing condition, applying a stress field, recording a micro-capsule rupture and dyeing condition in the model and the like. The system can realize tracking of generation and development of cracks in a complex geological condition analog simulation model, and track three-dimensional movement of internal ink dots to draw a displacement field four-dimensional image.

Description

technical field [0001] The invention relates to the field of machinery and mining technology engineering, in particular to a visualization system and method for a three-dimensional strain field of coal and rock under the influence of mining. Background technique [0002] As an important research method of rock formation control technology, similar simulation experiment has been widely accepted and recognized. However, in the traditional similar simulation experiment, it is impossible to observe the internal strain field distribution of the material intuitively, and to observe the internal strain through the indirect measurement method, not only there are large errors, but also the integrity of the model will be destroyed, resulting in unnecessary errors. By using transparent microcapsule composite materials to construct the model, the internal strain field distribution of the model can be observed directly and in real time without destroying the integrity of the model. At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/00G01N33/22G09B23/40
CPCG01N19/00G01N33/222G09B23/40B33Y80/00B33Y70/10G01V20/00B33Y10/00B29C64/10G06F30/20G06F2119/14G06Q50/02
Inventor 邹全乐刘涵张天诚宋遥张碧川苏二磊陈子涵王睿智吴斐
Owner CHONGQING UNIV
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