A mold for making rock-like samples with non-penetrating fractures

A rock sample, non-penetrating technology, applied in the field of rock mechanics, can solve the problems of high processing difficulty, crack angle error, and high processing accuracy requirements, so as to reduce the manufacturing difficulty and cost, reduce the mechanical property error, and ensure the manufacturing accuracy. Effect

Inactive Publication Date: 2018-12-21
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mold can be used to make crack samples with or without filler, and the crack can be adjusted by adjusting the position of the fixture in the circular gear-shaped hole formed by the combination of the upper half side plate and the lower half side plate. However, the mold still has the following deficiencies: (1) Since the fixture is set on the side plate, when making a rock-like sample with cracks, the two ends of the crack prefabricated piece are clamped in the clamps located on the front and rear side plates The subsequent direction is horizontal or has a certain angle with the horizontal plane. When using rock-like materials for pouring, the cracked prefabricated sheet will be bent and deformed due to the gravity of the rock-like material, which will cause errors in the angle of the cracks, making the pouring obtained The mechanical properties of rock-like specimens produce uncontrollable errors, and at the same time, the crack penetration mode between cracks will also show discreteness, resulting in inaccurate test results
(2) The mold uses the matching and adjustment between the circular gear-shaped fixture and the circular gear-shaped hole on the side plate to change the inclination angle of the crack. The processing of this gear-shaped fixture and the gear-shaped hole is more difficult , higher requirements on machining accuracy will result in higher mold production costs
(3) Since the mold is made of aluminum alloy, which is an opaque material, it is impossible to observe the state of the rock-like material in the mold during the pouring process. During the pouring process, air bubbles may be generated between the rock-like materials, and the bubbles will cause The cracked rock samples locally produce pores, and the mechanical properties of rock-like samples with different porosities are quite different, which will increase the uncontrollable variables in the research and affect the accuracy of the test results

Method used

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  • A mold for making rock-like samples with non-penetrating fractures
  • A mold for making rock-like samples with non-penetrating fractures
  • A mold for making rock-like samples with non-penetrating fractures

Examples

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Effect test

Embodiment 1

[0042] In this embodiment, the schematic diagram of the structure of the mold for making a rock-like sample containing non-penetrating cracks is as follows figure 1 as shown, figure 2 for figure 1 The front view of the mold includes bottom plate 1, side plate, fixing bolt 3, slit prefabricated sheet 10, cover plate 4, first slit angle adjustment block 5, second slit angle adjustment block 6, positioning bar 8 and cover plate positioning Item 9.

[0043] The structural schematic diagram of the first slit angle adjustment block is shown in image 3 , the first slit angle adjustment block 5 is a positive twelve prism platform, the first slit angle adjustment block is provided with a fixing seam 7, and the shape and size of the fixing seam 7 match the shape and size of the slit prefabricated sheet 10; The structural schematic diagram of the second crack angle adjustment block is shown in Figure 4 , the second slit angle adjustment block 6 is made up of a first regular prism ...

Embodiment 2

[0051] In this embodiment, the structure of the mold for making rock-like samples containing non-penetrating fractures is similar to figure 1 , the mold includes a bottom plate 1, a side plate, a fixing bolt 3, a slit prefabricated sheet 10, a cover plate 4, a first slit angle adjustment block 5, a second slit angle adjustment block 6, a positioning bar 8 and a cover plate positioning member 9.

[0052] The first slit angle adjustment block 5 is a regular pentagonal prism, the first slit angle adjustment block is provided with a fixing seam 7, the shape and size of the fixing seam 7 match the shape and size of the slit prefabricated sheet 10; Two slit angle adjustment blocks 6 are made up of the first regular prism stand 6-1 and the second regular prism stand 6-2, the cross-sectional area of ​​the first regular prism stand 6-1 is greater than the cross-section of the second regular prism stand 6-2 Area, and the cross section of the first regular prism stand 6-1, the cross sect...

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Abstract

The present invention provides a mold for producing a rock-like sample containing non-through type fracture. The mold comprises a bottom plate, a side plate, a fixing bolt, a fracture preform sheet, a cover plate, a first fracture angle adjusting block, a second fracture angle adjusting block, a positioning strip and a cover plate positioning member, wherein the bottom plate, the side plate, the cover plate, the first fracture angle adjusting block and the second fracture angle adjusting block are prepared from an organic transparent plate. According to the present invention, through the first fracture angle adjusting block and the second fracture angle adjusting block, the fracture preform sheet is fixedly in the mold in the direction perpendicular to the horizontal plane, and the bending deformation of the fracture preform sheet due to the gravity effect of the rock-like material during the rock-like sample pouring cannot be generated, such that the fracture precision can be easily improved, and the quality of the rock-like sample can be improved; and the production difficulty and the production cost of the mold are low, and the method is easy to promote and apply.

Description

technical field [0001] The invention belongs to the field of rock mechanics, in particular to a mold for making rock-like samples containing non-penetrating cracks. Background technique [0002] Under certain geological conditions, rock mass in nature basically contains various discontinuous structural planes such as cracks, joints, and faults. These discontinuous structural planes are common in engineering areas and play an important role in the stability of rock mass in engineering areas Impact. With the rapid development of geotechnical engineering construction, more and more transportation, mining, water conservancy, energy and national defense construction facilities are built in fractured rock mass areas. Engineering construction safety and construction efficiency are of great significance. Due to the discrete fracture structure of rock mass in nature, it is difficult to obtain accurate information about fractures in experiments. Therefore, many researchers are curre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 戴峰冯鹏徐奴文刘燚赵涛
Owner SICHUAN UNIV
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