Method for preparation of columnar jointed rock mass similar material sample by 3D printing technology

Abstract

The invention discloses a method for preparation of a columnar jointed rock mass similar material sample by a 3D printing technology. The method includes: preparing powdered 3D printing raw materials: powder, columnar jointed column powder, joint needed powder and cementing bonding powder; loading the powdered materials into a 3D printer; establishing a columnar jointed sample three-dimensional model, and inputting the model into the 3D printer to conduct 3D printing; and carrying out after-treatment on the sample at the end of printing. The method provided by the invention applies the 3D printing technology into rock mechanical test for the first time, uses a similar material to simulate the basic characteristics of a columnar jointed rock mass in actual engineering, and has the advantages of simple preparation process, higher production efficiency than artificial sample preparation, and high yield, etc.

Description

Technical field [0001] The invention belongs to the field of rock mechanics and engineering, and relates to the preparation of samples during experimental research of rock mechanics, and in particular to a method for preparing samples of similar materials in columnar jointed rock masses using 3D printing technology. Background technique [0002] In the neighborhood of rock mechanics and rock engineering, rock testing is the basis for studying the physical and mechanical properties of rocks and rock mechanics, and an important method for laboratory rock testing of rock mechanics. [0003] The samples usually used in the laboratory test of rock mechanics are collected from the rock mass on site. For rock masses with broken rock mass structure and relatively many structural surfaces, it is very difficult to sample on site through drilling. In order to overcome these difficulties, researchers have adopted field tests instead of indoor tests, or used concrete, resin and other similar ma...

AI Technical Summary

Problems solved by technology

However, these methods all have disadvantages: the test results are highly discrete with samples taken on site; field tests are usually limited by conditions such as the site environment and test costs, and it is impossible to conduct a large number of tests; When preparing samples, it is necessary to design and manufacture molds. The porosity inside the samples cannot be accurately controlled, and the results also have a certain degree of discreteness. Moreover, samples with complex structures are difficult to obtain by manual sample preparation.

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