Preparation method of transparent columnar jointed rock mass sample based on 3D printing technology

Abstract

The invention discloses a preparation method for a transparent columnar jointed rock test sample based on a 3D printing technique. The method comprises the following steps: S1, acquiring physical properties of a columnar jointed rock; S2, establishing a columnar jointed grid model; S3, printing the columnar jointed grid model; S4, adding a primary jointed face; S5, preparing a columnar jointed test sample; and S6, monitoring inner cracks. The columnar jointed grid is printed through the 3D printing technique, the columnar jointed test sample which is anisotropic and is relatively good in visual degree is prepared by simulating the columnar rock through resin, and the whole preparation process of the test sample does not need polishing and cutting. The method overcomes the homogenization problem caused by the 3D printing of the test sample and the cracking problem of the joint in the polishing process.

Description

technical field [0001] The invention relates to the technical field of rock mechanics and engineering, in particular to a method for preparing a transparent columnar jointed rock mass sample based on 3D printing technology. Background technique [0002] Columnar jointed rock mass is widely distributed in Southwest China, and it is an anisotropic complex rock mass containing a variety of acoustic joints. Due to the high cost of field tests and the difficulty of obtaining all the mechanical parameters required by the project, scholars at home and abroad generally use concrete, gypsum, resin and other similar materials for indoor tests. However, it is difficult to prepare a sample that contains a large number of joints and meets the test requirements. It is easy to cause cracking of the sample during the grinding and cutting process, and the prepared columnar joint sample has a low degree of visualization, and it cannot be accurately observed even with a CT scanner. to the dev...

AI Technical Summary

Problems solved by technology

[0004] 1. Extremely expensive

[0005] 2. It is difficult for the columnar joint samples printed by 3D printing technology to reflect the anisotropy of real rock mass

[0006] 3. The later grinding, polishing and leveling process can easily cause internal cracking of the sample

[0007] 4. The visibility of the sample is low, and it is impossible to observe the development process of the internal crack of the sample

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