A method of making a transparent material for simulating internal crack propagation in rocks

Abstract

The invention discloses a manufacturing method of a rock-internal-crack-simulated expansion transparent material, which comprises the following steps: manufacturing a mold, manufacturing a prefabricated crack, manufacturing a mixed solution, carrying out repeated baking and refrigeration on the solidified specimen, and the like to finally obtain the rock-internal-crack-simulated expansion transparent material. The manufacturing method is convenient to operate; the experiment testing proves that various properties of the manufactured rock-internal-crack-simulated expansion transparent material are approximate to those of rock, and the rock-internal-crack-simulated expansion transparent material satisfies the two most important properties (brittleness and expansion due to shear under monoaxial compression conditions); and the method can solve the problem that the rock internal crack can not be visually observed in deed, and has important practical meanings for researching the true rock internal crack expansion perforation mechanism.

Description

technical field [0001] The invention relates to a method for making a transparent material for simulating internal crack expansion of rocks, and belongs to the field of rock mass failure prediction in geotechnical engineering. Background technique [0002] The original cracks inside the rock mass have a very important impact on the strength and stability of the rock mass. Many rock mass instability and collapse accidents at home and abroad are the result of the expansion and growth of the original cracks inside the rock mass under the action of external forces and finally penetrate. Aiming at this problem, predecessors have carried out a lot of experimental work to study the propagation and penetration of internal cracks in rock mass under compression. In the past, scholars mostly used similar materials such as gypsum or cement mortar or directly used real rock mass to carry out mechanical tests to study the internal crack growth process, but most of them were limited to the...

AI Technical Summary

Problems solved by technology

In the past, scholars mostly used similar materials such as gypsum or cement mortar or directly used real rock mass to carry out mechanical tests to study the internal crack growth process, but most of them were limited to the study of surface cracks, because both real rock mass and similar materials are opaque materials. These materials have achieved many meaningful results in the study of the propagation of surface cracks or penetrating cracks, but it has become very difficult to study the crack propagation inside the rock mass. First of all, it is very difficult to prefabricate cracks inside these materials. The shape and angle of cracks required for prefabricated tests are even more unrealistic. Secondly, even if there are cracks inside the material, the specific process of crack expansion cannot be observed during the experiment, and only the final failure of the specimen can be seen.

In recent years, some scholars have used CT scanning to study the crack propagation inside the rock mass and achieved some meaningful results. However, CT scanning is not enough in timeliness. it is difficult to capture

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