Manufacturing method of rock-internal-crack-simulated expansion transparent material

A technology of internal cracks and transparent materials, applied in the field of rock mass failure prediction in geotechnical engineering, can solve the problems of unrealistic cracks, difficult to capture the initiation and expansion mechanism of micro cracks, and insufficient immediacy of CT scanning, and achieve the effect of convenient operation.

Inactive Publication Date: 2015-02-04
HOHAI UNIV
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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 v...

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  • Manufacturing method of rock-internal-crack-simulated expansion transparent material
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  • Manufacturing method of rock-internal-crack-simulated expansion transparent material

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specific Embodiment approach

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] A method for making a transparent material for simulating internal crack extension of rocks according to the present invention comprises the following steps:

[0024] (1) Mold making: such as Figure 1 to Figure 4 As shown, the mold is made of PMMA material, and the mold can be made into any size according to the needs. For example, it can be a cuboid shape of 50mm*50mm*120mm. The upper mouth of the mold is open and the lower end is closed. A small hole of 2 mm is used to fix the prefabricated crack in the appropriate position inside the mold with a thin cotton thread through the small hole in the subsequent steps; after that, apply a thin layer of ? ;

[0025] (2) Fabrication of prefabricated cracks: Use mica sheet 1 as the prefabricated crack, and cut mica sheet 1 into an ellipse with a major axis of 12 mm, a minor axis of 8 m, and a thickness of 1 mm accord...

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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...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08K13/02C08K5/14C08K3/36C08J3/24B29C39/10
Inventor 朱珍德程实林恒星孙亚霖罗志华刘春梅傅蜀燕
Owner HOHAI UNIV
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