Method for researching mechanical behaviors of soft and hard interbedded rock mass based on 3D printing technology

Abstract

The invention discloses a method for researching mechanical behaviors of soft and hard interbedded rock mass based on a 3D printing technology. The method comprises the following steps: 1, collecting samples of rock and a structural surface; 2, performing three-dimensional laser scanning on a natural soft and hard interbedded rock mass layer; 3, 3D printing of the rock-like material and manufacturing of a physical model; 4, carrying out a corresponding rock mechanical test; compared with a conventional sample preparation method, the method has the following advantages: the internal material of the 3D printing model is approximately homogeneous, so that the evolution rule of the damage of the 3D printing model is easier to observe during a test; soft and hard interbed rock mass models with different strengths are realized by controlling the glue concentration and the glue saturation in the 3D process; through scanning and extraction of a natural rock structural surface, 3D printing is adopted to reconstruct the natural structural surface, and the interface conditions of the soft and hard interbed rock mass can be reflected more truly.

Description

Technical field [0001] The present invention belongs to the field of rock mass mechanics, and specifically, a method of studying the mechanical behavior of soft mutual layer rock based on 3D printing technique. Background technique [0002] Soft and crazy rocks are common in the deposition formation and have extremely widely distributed in our country. Soft and hard-mutual layer rock masses generally develop a large number of tension structural surfaces due to their special geological environments and their mechanical properties, the existence of this type of structural surface reduces the integrity of rock mass and weaken rock body mechanics. nature. The tension characteristics of the junction have broken the tight state of the rock structure, causing insufficient rock body carrying capacity, loss of stability, and enhancement of permeability. Therefore, the study of the mechanical properties and destruction form of the soft and hard intermodamer is carried out, in order to reve...

AI Technical Summary

Problems solved by technology

However, due to the limitations of 3D printing materials and processes, the simulation of the mechanical properties of complex interbedded rock matrices is not perfect

The main problems are: (1) There is a lack of preparation methods for layered rock mass materials based on 3D printing, especially for soft and hard interbedded rock masses with heterogeneous shear mechanical behavior at the interface

(2) There is a lack of research on the influence of selected materials on the physical and mechanical behavior of the finished product, and it is impossible to evaluate the response of the model's mechanical evolution process to 3D printing technology

(3) Less research involves 3D fine printing of soft and hard interbedded rock mass and a complete set of process methods for monitoring mechanical behavior

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