A preparation method of permeable rock mass based on 3D printing

Abstract

The invention discloses a method for preparing a permeable rock mass based on 3D printing. Through the combination of CT scanning and 3D printing, by closing the roar, different pores can be artificially reserved according to the research purpose without using traditional molds. and throats to facilitate the study of rock permeability; using micro-nano CT to scan permeable rock samples can directly reflect the distribution of pores, throats and joints inside the rock, improving the visualization effect; selective laser sintering technology can ensure The glue is evenly bonded and has high precision, which avoids affecting the distribution characteristics of the throat, and can realize the alternate printing of 3D printed rock mass materials, pore throat materials, and joint filling materials, and reserves seepage channels, so that the sample can be formed at one time, avoiding the traditional Damage to the internal structure of the sample by technical demoulding. The internal structure of the sample prepared by this method is consistent with that of the natural permeable sample, which provides a new method for rock physics experimental research.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, in particular to a method for preparing a permeable rock mass based on 3D printing. Background technique [0002] Rock mass often contains complex internal structural features, such as criss-cross joints and fissures, and holes of different shapes and sizes. These defects will directly affect the deformation, strength and seepage characteristics of the entire rock mass, and are related to the stability of rock mass engineering. sex. [0003] The microscopic pore-throat structure is an important factor determining the seepage characteristics. For the study of the microscopic seepage characteristics of rock mass, there are currently two main approaches: one is to start from the experiment and observe and measure the flow state of fluid in different pores, but due to the Due to the complexity of the structure, the experimental results obtained are often highly discrete; another met...

AI Technical Summary

Problems solved by technology

By combining the two technologies, the complex three-dimensional structure inside the natural rock mass can be highly restored and the corresponding physical samples can be quickly prepared. Although researchers have conducted a lot of research on the internal pores and cracks of the rock mass, how to obtain However, the pore structure, seepage characteristics and throat distribution of natural rocks have not been effectively resolved.

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