A kind of preparation method of dense unfilled fracture rock mass sample

Abstract

The invention discloses a preparation method of a dense non-filling fractured rock sample. The preparation method comprises the following steps: (1) simulating the structures and shapes of fractures in the actual fractured rock, determining three-dimensional digital spatial models of various fractures in a to-be-prepared sample, and carrying out 3D printing by adopting tin materials to obtain fracture simulation components of different types; (2) simulating mechanical properties of the actual fractured rock to prepare cement mortar, pouring the cement mortar into a mould twice, and while pouring, placing the fracture simulation components; (3) after a to-be-detected sample is solidified and formed, demoulding and carrying out primary maintenance; (4) processing the sample at low temperature until the fracture simulation components become powder and fractures are formed; (5) performing maintenance again, and processing, thus obtaining the dense non-filling fractured rock sample. According to the invention, the tin materials are used for manufacturing the fracture simulation components, and the fracture simulation components can become powder at low temperature and form the fractures, and the sample is not needed to be taken out after being prepared to avoid damage to the sample; the positions of the fracture components can be determined accurately through pouring the sample at different time intervals.

Description

technical field [0001] The invention relates to a preparation method of a rock mass sample, in particular to a preparation method of a dense unfilled fissure rock mass sample, which belongs to the field of rock mechanics. Background technique [0002] Rock is the basic material that makes up the earth's crust. It is a natural body formed by the accumulation of minerals or cuttings according to certain rules under geological action. The rock has undergone various geological actions and under the long-term action of in-situ stress. Various images of permanent deformation and traces of various geological structures, such as folds, joints, faults, cleavages, fine cracks, etc. At present, there is a lack of a method that can accurately locate the fracture position and simulate the fracture shape well. Based on this background, there is an urgent need for a relatively complete method for preparing dense fractured rock mass samples. [0003] The Chinese invention patent applicatio...

AI Technical Summary

Problems solved by technology

However, this method has the following problems: (1) The shape of the tin strips is deformed (2) A large number of tin strips may stick together (3) The position of the crack cannot be simulated

Although the practical ceramic material of this method is very useful for the later fired samples, it is not sure whether it can replace the mortar to simulate the rock mass, and then filling the cracks with highland barley paper and firing in the kiln will produce more additional Materials may not be effective in simulating cracks without filling, and at the same time, when simulating other types of cracks, the steel rods for simulating cracks have to be remade, which is troublesome

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