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Preparation method of irregular cylindrical joint crack network model rock core test sample

A technology of columnar joints and fissure network, which is used in the preparation of test samples, soil material testing, material inspection products, etc. The mechanical properties of the jointed core and the inability to effectively reflect the mechanical properties of the columnar jointed rock mass have achieved the effects of simple materials, simple operation and low cost.

Inactive Publication Date: 2015-02-25
HOHAI UNIV
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Problems solved by technology

The Chinese patent with application number 2014102608609 discloses a method for preparing artificial shale cores, which is only a method for generating core samples considering the mechanical properties of shale bodies with large-scale longitudinal joints, and cannot be used for Consider and analyze the mechanical properties of vertical columnar joint core
Xiao Weimin's paper "Model Test Research on Deformation and Strength Anisotropy of Columnar Jointed Rock Mass under Uniaxial Compression" analyzed the model test of similar materials for columnar jointed rock mass, but this model test uses large-sized columns. There are only a small amount of columnar joint grids, which cannot overcome the boundary effect and cannot effectively reflect the mechanical properties of the columnar joint rock mass. Moreover, the compressive strength of the columnar joint rock mass can only be analyzed with a uniaxial instrument. Due to the large size of the sample The mechanical properties of columnar joint rock mass cannot be analyzed by triaxial instrument, and the mechanical properties of irregular columnar joint rock mass cannot be analyzed at the same time

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  • Preparation method of irregular cylindrical joint crack network model rock core test sample
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  • Preparation method of irregular cylindrical joint crack network model rock core test sample

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Embodiment 1

[0044] A method for preparing an irregular columnar joint fissure network model core sample, comprising the following steps:

[0045] (1) Irregular voronoi graphics are generated by controlling the polygon radius and shape during the voronoi generation process. This shape is a regular quadrilateral with a side length of 70mm, such as figure 1 , expand the voronoi graph to generate a 3D random columnar joint fissure network with a height of 150mm, such as figure 2 .

[0046] (2) Use plexiglass blocks to cement together to form the 3D random columnar joint fissure network in step (1). The size of the joint fissure network shape that is generated in the step (1) obtains the size of the plexiglass block according to equal proportions, obtains the plexiglass block of fixed size by cutting large pieces of plexiglass, wherein the height of this plexiglass block is 150mm, and the thickness According to the joint fissure network in step (1), the plexiglass blocks are spliced ​​toget...

Embodiment 2

[0056] A method for preparing an irregular columnar joint fissure network model core sample, comprising the following steps:

[0057] (1) Irregular voronoi graphics are generated by controlling the polygon radius and shape during the voronoi generation process. This shape is a regular quadrilateral with a side length of 70mm, such as figure 1 , expand the voronoi graph to generate a 3D random columnar joint fissure network with a height of 150mm, such as figure 2 .

[0058] (2) Use plexiglass blocks to cement together to form the 3D random columnar joint fissure network in step (1). The size of the joint fissure network shape that is generated in the step (1) obtains the size of the plexiglass block according to equal proportions, obtains the plexiglass block of fixed size by cutting large pieces of plexiglass, wherein the height of this plexiglass block is 150mm, and the thickness According to the joint fissure network splicing plexiglass block in step (1), thereby the ple...

Embodiment 3

[0068] A method for preparing an irregular columnar joint fissure network model core sample, comprising the following steps:

[0069] (1) Irregular voronoi graphics are generated by controlling the polygon radius and shape during the voronoi generation process. This shape is a regular quadrilateral with a side length of 70mm, such as figure 1 , expand the voronoi graph to generate a 3D random columnar joint fissure network with a height of 150mm, such as figure 2 .

[0070] (2) Use plexiglass blocks to cement together to form the 3D random columnar joint fissure network in step (1). The size of the joint fissure network shape that is generated in the step (1) obtains the size of the plexiglass block according to equal proportions, obtains the plexiglass block of fixed size by cutting large pieces of plexiglass, wherein the height of this plexiglass block is 150mm, and the thickness According to the joint fissure network splicing plexiglass block in step (1), thereby the ple...

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Abstract

The invention discloses a preparation method of an irregular cylindrical joint crack network model rock core test sample. The preparation method comprises the following steps: (1) generating a voronoi graph by utilizing a program algorithm, and further generating a 3D random cylindrical joint crack network shape; (2) establishing different cylindrical joint crack networks in the step (1) by simulating the size of a joint by utilizing organic glass with the different thicknesses; (3) filling the joint of each cylinder with different filling materials to simulate the strength among different joints; and (4) acquiring an artificial rock core test sample of a random irregular cylindrical joint. The test sample obtained by utilizing the method can be used for researching an artificial cylindrical joint model test sample with the cylindrical joints with the irregular shapes, the variation of the joint size and the variation of the joint strength and can be used for relatively accurately simulating the mechanical characteristics, permeable characteristics and rheolytic characteristics of cylindrical joint rocks with variable joint cracks, variable joint sizes and variable joint strength. The preparation method is low in cost and easy to operate.

Description

technical field [0001] The present invention relates to engineering problems in the fields of rock mechanics engineering, hydropower engineering, petroleum engineering, mining engineering, etc., with columnar joint fissure rock masses as rock engineering objects, and specifically relates to the design of samples in irregular joint fissure network models in model tests. Preparation. Background technique [0002] The formation of rock mass is the result of deformation and destruction in the long geological history process, which is the result of the joint action of construction and reconstruction. Due to different geological causes, different types of lithology and lithofacies are formed, which constitute the material basis of the rock mass; at the same time, the rock mass has undergone multiple tectonic movements and complex epigenetic evolution, resulting in structural deformation and Fracture, destroying the integrity of the rock mass, widely developed structural planes of...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N33/24
Inventor 徐卫亚林志南吉华王如宾闫龙冉少鹏曹亚军
Owner HOHAI UNIV
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