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Small bore inner wall strain foil pasting method for rock stress releasing test and apparatus thereof

A technology of rock stress and sticking device, which is applied in the field of rock mechanics testing, can solve the problems of narrow space, lack of convenient and accurate sticking tools or devices for strain gauges on the inner wall of small rock drilling holes, difficulty in sticking strain gauges, etc., and achieve the effect of convenient operation

Inactive Publication Date: 2018-08-14
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When it is necessary to test the internal strain of the rock, such as the deformation characteristics of the inner wall of a small rock drilling hole under loading and unloading conditions, the size of the drilling hole is too small, about 3 to 5 cm, and the hole depth is 10 to 30 cm. The space is narrow, and it is very difficult to paste the strain gauge. Only special measures can be operated, and there is a lack of convenient and accurate tools or devices for sticking strain gauges on the inner wall of small rock drilling holes

Method used

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  • Small bore inner wall strain foil pasting method for rock stress releasing test and apparatus thereof
  • Small bore inner wall strain foil pasting method for rock stress releasing test and apparatus thereof
  • Small bore inner wall strain foil pasting method for rock stress releasing test and apparatus thereof

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0028] The invention relates to a method for sticking strain gauges on the inner wall of a small borehole for a rock stress relief test, comprising the following steps:

[0029] S1 Install the two airbags on the fixing device, and set the strain gauge laying sheet and the adhesive storage device on the two airbags respectively, wherein the strain gauge laying sheet is provided with a groove connected with the adhesive storage device;

[0030] S2 Temporarily fix the strain gauge at the center of the strain gauge laying sheet, and deliver the airbag to the set position in the small drill hole;

[0031] S3 first inflate the airbag where the adhesive is located, squeeze the adhesive between the groove and the inner wall of the borehole, then inflate the airbag where the strain gauge laying piece is located, and paste the strain gauge on the inn...

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Abstract

The invention discloses a small bore inner wall strain foil pasting method for a rock stress releasing test and an apparatus thereof. Two air bags are arranged at a fixing device, a strain foil pasting laying piece and a binder storage apparatus are respectively arranged at two air bags, and a groove connected with the binder storage apparatus is arranged at the strain foil pasting laying piece; the strain foil is temporarily fixed at the strain foil pasting laying piece, and the air bag is conveyed to a set position in a small bore; the air bag of the binder is inflated, the binder is extruded between the groove and the inner wall of the bore, the air bag of the strain foil pasting laying piece is inflated, and the strain foil is pasted at the inner wall of the bore; after the strain foilis fixed, the air bag, the binder storage apparatus and the strain foil pasting laying piece are recovered through twisting, and the strain foil can be pasted. The pasting work of the strain foil atthe inner wall of the small bore of the rock is conveniently and accurately realized.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics tests, and relates to a method and a device for pasting strain gauges on the inner wall of small boreholes for rock stress relief tests. Background technique [0002] In the rock stress relief test, it is necessary to test the strain value of the rock under the external load. Strain gauges are often used for testing. The strain gauges have the advantages of high precision and low price. Generally, the strain gauges are pasted on the outer surface of the specimen. When it is necessary to test the internal strain of the rock, such as the deformation characteristics of the inner wall of a small rock drilling hole under loading and unloading conditions, the size of the drilling hole is too small, about 3 to 5 cm, and the hole depth is 10 to 30 cm. The space is narrow, and it is very difficult to paste the strain gauge. Only special measures can be operated, and there is a lack of convenient and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02
CPCG01N3/02G01N2203/0075
Inventor 康永水刘泉声桑昊旻万文恺陈磊刘滨朱元广卢兴利黄兴刘学伟
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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