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Artificial simulation discontinuous fracture sample preparation method

An artificial simulation and discontinuous technology, which is applied in the preparation, sampling, and measuring devices of test samples, can solve the problems of high price, complicated and difficult molding process, and inconvenient transportation of materials, and achieve stable physical, mechanical and chemical properties. The effect of convenient production process and convenient materials

Pending Publication Date: 2021-09-17
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

However, the above method has (1) complex and difficult molding process of the test piece; (2) inconvenient transportation of materials and high price

Method used

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  • Artificial simulation discontinuous fracture sample preparation method
  • Artificial simulation discontinuous fracture sample preparation method
  • Artificial simulation discontinuous fracture sample preparation method

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Embodiment Construction

[0021] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. As a part of this specification, the principles of the present invention will be described through examples. Other aspects, features and advantages of the present invention will become clear through the detailed description. In the referenced drawings, the same reference numerals are used for the same or similar components in different drawings.

[0022] The artificially simulated discontinuous crack sample preparation method provided in this embodiment includes: using a borehole peeper to observe the internal cracks and water content of the surrounding rock in the sandstone section of the main inclined shaft of Hongqingliang Coal Mine, such as figure 1 shown. The analysis shows that there are objective existence of unfavorable factors such as water content in the surrounding rock of the sandstone section, development of fractures, and we...

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Abstract

The invention discloses an artificial simulation discontinuous fracture sample preparation method, which comprises steps of (1) taking cement, sand and talcum powder according to a ratio of 1: 2: 5, uniformly stirring, adding a sodium glutamate crystal with a corresponding mass calculated according to the porosity, uniformly stirring, and loading into a sample size mold required by a uniaxial test and a triaxial test in a layered manner, (2) performing air curing on the test piece for 28 days, performing water treatment on the test piece, and performing vacuum saturation for 48 hours, (3) taking out the water body in the last vacuum saturation container, filtering the water body through filter paper to filter solid impurities, pouring the water body into a clean vessel, heating to evaporate the water body in the container, if no crystal is separated out, considering that water-passing fractures which are uniformly distributed and relatively uniform in geometric dimension are formed in the test piece, if a large number of crystals are separated out, repeating the water treatment stage operation. The size of the prefabricated crack can be uniformly and randomly distributed in the internal space of the sample as far as possible, and the forming process of the test piece and the manufacturing process of the prefabricated crack are convenient; and materials are convenient to take and reasonable in price.

Description

technical field [0001] The invention belongs to the technical field of calcium phosphate bioceramic materials, and in particular relates to a method for preparing artificially simulated discontinuous crack samples. Background technique [0002] Fractured rock mass is a common complex medium in many geotechnical engineering, with material properties between solid and fluid. In actual underground engineering, the rock mass is in a complex geological environment where the seepage field and the stress field are coupled. The creep problem of rock has been paid attention to by rock mechanics and engineering circles at home and abroad. [0003] Horii (Horii H, Nemat-Nasser S, 1985. Compression-induced microcrack growth in brittle solids: axial splitting and shear failure. Journal of Geophysical Research, 90 (B4): 3105-3125) based on the theory of linear elastic fracture mechanics, the prefabricated opening The mechanism of crack initiation, propagation and penetration failure of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/36G01N1/38
CPCG01N1/36G01N1/38G01N2001/366
Inventor 张向东张宇杨建军
Owner LIAONING TECHNICAL UNIVERSITY
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