Fluid-solid coupling analog simulation material capable of reproducing cracks and preparation method

A fluid-solid coupling and similar simulation technology, applied in the preparation of test samples, analysis materials, material inspection products, etc., can solve the problem of not having water absorption and water permeability, unable to simulate water storage and water permeability of natural rock materials, and non-confluence Simulation of solid coupling engineering problems, etc.

Inactive Publication Date: 2020-12-11
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional similar simulation materials composed of sand, gypsum, calcium carbonate, and mica disintegrate quickly when exposed to water. Due to the water separation of grouting grout, such traditional materials are not suitable for the above-mentioned fluid-solid coupling projects. simulation of the problem
Although some new similar simulation materials have the characteristics of not disintegrating when exposed to water, they do not have good water absorption and water permeability, and cannot simulate the water storage and water permeability of natural rock materials.
Therefore, the existing materials cannot be applied to similar simulations of mining engineering under fluid-solid coupling conditions, such as mining under water bodies, overlying rock isolation and grouting filling, etc.

Method used

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  • Fluid-solid coupling analog simulation material capable of reproducing cracks and preparation method
  • Fluid-solid coupling analog simulation material capable of reproducing cracks and preparation method
  • Fluid-solid coupling analog simulation material capable of reproducing cracks and preparation method

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preparation example Construction

[0038] A preparation method of a fluid-structure interaction similar simulation material that reproduces a fissure, the steps of which are as follows:

[0039] a. The river sand, paraffin, talc, hydraulic oil, bio-cellulosic powder, and pva soluble materials are proportioned by mass;

[0040] b. The pva soluble material is made into a fissure body with a wire diameter of 0.1 mm and a length of 2 to 5 cm;

[0041] c. Put the river sand into the electric heating pot to heat and keep stirring for 3 minutes. After the river sand is heated, add talc powder to keep the temperature and continue to stir evenly. The stirring time is about 1 to 3 minutes;

[0042] d. After stirring the river sand and talc powder evenly, add paraffin to the electric heating pot until it melts, continue to maintain the temperature and stir all the materials evenly. The mixing time is about 3 minutes, and then add hydraulic oil to the electric heating pot and continue to stir for 1 minute. ;

[0043] e. ...

Embodiment 1

[0055] Using disintegration experiments to reproduce the fluid-structure interaction of the fractures similar to the hydraulic properties experiments of simulated materials:

[0056] The disintegration experiment is the process of verifying that the test piece will not disintegrate when immersed in water. The raw material of this experiment is the test piece block after the strength test, and the control group is the traditional material test piece.

[0057] Experimental steps: Take several test pieces and put them into water for observation and comparison.

[0058] Experimental results: The specimens prepared with paraffin wax have good non-hydrophilic properties. As expected, this similar simulated material has stable properties in water, and there is no slag drop or decomposition. Compared with traditional similar materials, it is Disintegration and sliming can occur, and disintegration experiments such as figure 2 shown.

[0059] Saturated water absorption test:

[006...

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Abstract

The invention discloses a preparation method of a fluid-solid coupling analog simulation material capable of reproducing cracks. The preparation method is suitable for physical simulation of hydrogeology, 3D printing and grouting filling mining. The mass ratio is as follows: river sand 70%-80%, talc powder 10%-15%, hydraulic oil 3%-5%, paraffin 2%-8%, biofibrous powder 1%-3%, PVA soluble material2%. The materials are heated and stirred and then put into a mold to be shaped, shaped magnetic therapy makes full contact with water and is completely melted, and therefore tiny cavities of differentshapes are formed in the simulation material so as to simulate middle cracks of a rock mass. The material does not disintegrate when meeting water, has water storage and permeation capabilities, andhas a good simulation effect in fluid-solid coupling experiments such as water-retaining mining simulation or grouting filling simulation; the material strength can be adjusted within a certain rangeto realize simulation of different rock stratums, and the raw materials are low in price, easy to prepare and capable of being rapidly and massively manufactured.

Description

technical field [0001] The invention relates to a fluid-solid coupling similar simulation material and a preparation method, and is especially suitable for a fluid-solid coupling similar simulation material and preparation method for reproducing cracks used in the physical simulation of hydrogeology, 3D printing and grouting filling mining. Background technique [0002] Physical similarity simulation is an important experimental method to study mining engineering problems and has been widely used. The traditional similar simulation materials are mainly composed of sand, gypsum, calcium carbonate and mica, which have played an important role in the research of mine pressure and rock formation movement, and have become an important means of research in this field. However, the actual mining engineering is diversified, and also involves a variety of problems in the interaction of water, slurry and other fluids with the rock mass, such as mining under water, overlying rock isola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/30G01N1/36G01N1/44G01N33/24
CPCG01N1/28G01N1/30G01N1/36G01N1/44G01N33/24G01N2001/366
Inventor 轩大洋郑恺丹李建许家林
Owner CHINA UNIV OF MINING & TECH
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