Real-time ultrasonic scanning device used during rock triaxial compression

A technology of three-axis compression and scanning device, which is applied in measuring device, using stable tension/pressure test material strength, instrument, etc., can solve the problem of cracks not being able to be located, achieve reliable test methods, and prevent disasters and accidents.

Pending Publication Date: 2017-05-10
HUBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that cracks cannot be located in the constitutive model of the rock sample under

Method used

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  • Real-time ultrasonic scanning device used during rock triaxial compression
  • Real-time ultrasonic scanning device used during rock triaxial compression
  • Real-time ultrasonic scanning device used during rock triaxial compression

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[0018] In the following, the technical solution of the present invention will be further described in detail through the embodiments and the accompanying drawings. As shown in Figures 1-3, the test chamber 10 in which the rock sample is placed in the device is composed of an indenter 4, an upper clamp 5, and an upper The water permeable backing plate 6, the lower water permeable backing plate 11, and the lower clamp 12 are formed. The test chamber 10 is placed on the top round table of the bottom cover 14, and is fixed on the top round table by the lower clamp 12. Rock samples are placed in the test chamber 10. The upper water-permeable pad 6 and the lower water-permeable pad 11 make the rock sample evenly compressed in the test chamber and facilitate the pore pressure test of the rock sample.

[0019] The three sets of ultrasonic scanning probes 13 in the device are placed on the central circular platform of the bottom cover 14 at 120° to each other, and are closely attached to t...

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Abstract

The invention provides a real-time ultrasonic scanning device used during rock triaxial compression. The real-time ultrasonic scanning device comprises an axial pressing structure, a circumferential pressing structure and an ultrasonic scanning structure, wherein the axial pressing structure is an electro-hydraulic servo system (1), the circumferential pressing structure comprises an axial-penetrating cylinder barrel (9), the upper end and the lower end of the cylinder barrel (9) are respectively sealed by a top cover (3) and a bottom cover (14), the cylinder barrel (9), the top cover (3) and the bottom cover (14) jointly form a confining pressure chamber (7), a sample testing chamber (10) is arranged in the confining pressure chamber (7), and the ultrasonic scanning structure is a plurality of groups of ultrasonic scanning probes (13) connected to the outer lateral wall of the testing chamber (10). The real-time ultrasonic scanning device has the advantages that ultrasonic scanning can be performed on rock during the rock triaxial compression to monitor the generation of the internal cracks of the rock in real time, accurate experiment data can be obtained, a reliable testing and experiment result can be provided for a project, and a reliable testing method is provided for the prevention of project disasters and accidents caused by the cracks.

Description

technical field [0001] The invention relates to a system for ultrasonic real-time scanning during triaxial compression of rocks, in particular to a device for real-time detection of cracks generated in rocks during triaxial compression using an ultrasonic detection imaging system. Background technique [0002] With the deep geological disposal of radioactive nuclear waste, deep mining of mine resources, underground gasification of coal and oil shale, development of geothermal resources, safe drainage and comprehensive utilization of coal seam gas and other major engineering issues, research on the physical and mechanical properties of rocks after high temperature It has become the mainstream research direction in the rock field. After the rock has experienced high temperature, the thermal stress caused by the temperature will lead to thermal cracking of the rock structure, which will affect the physical and mechanical properties of the rock, causing a large number of cracks ...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N3/06
CPCG01N3/068G01N3/12G01N2203/0066G01N2203/0064G01N2203/0256G01N2203/0658G01N2203/0019G01N2203/0003G01N2203/0048
Inventor 张帆余煜东胡维操旺进赵建建胡大伟
Owner HUBEI UNIV OF TECH
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