Rock property test system and rock damage evolution test method

A technology for testing systems and rock properties, applied in measuring devices, material analysis using acoustic wave emission technology, instruments, etc., can solve the problems of limited applicability, high research costs, discrete macroscopic mechanical behavior, etc., and achieve the goal of overcoming geometric shapes Effects of restrictions, reliable method support, and low research costs
CN106918629AInactive Publication Date: 2017-07-04HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HOHAI UNIV
Publication Date
2017-07-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a rock property test system, which comprises a rock microscopic optical tester. A fully saturated sample is placed on the rock microscopic optical tester, and the surface of the fully saturated sample is provided with an acoustic emission test system and a resistivity test system. Specifically, a rock damage evolution test method includes the steps of: 1. connecting the rock microscopic optical tester with the acoustic emission test system and the resistivity test system in parallel; 2. assembling a rock property test system; 3. performing uniaxial compression test and observing the correlation of the rock's wave electric field parameters and strain under a loaded condition; 4. quantitatively describing the appearance and internal injury of the rock at each loading stage under a load-bearing condition; and 5. at each stage of uniaxial compression damage evolution, employing different damage variables to describe the rock damage evolution process. The system and the method provided by the invention can realize whole course observation of the whole process of the rock internal and external damage rupture, and overcomes the restriction of traditional testers on the sample shape.
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Description

technical field

[0001] The invention belongs to the technical field of rock mechanics and geology, and in particular relates to a rock characteristic testing system and a rock damage evolution testing method thereof. Background technique

[0002] Engineering rocks often contain a large number of tiny cracks and micro-cavities. At the same time, the loss and fracture process of rocks under load is often a process of microscopic damage expansion and evolution, and macroscopically shows a staged stress-strain curve. The development of research on the damage evolution mechanism of rock-like solid materials is extremely slow. First, there is a lack of reliable mesoscopic damage quantification methods. Second, the complexity of the internal structure of rock-like materials and the discreteness of macroscopic mechanical behavior.

[0003] The development of rock microscopic optical testing machine has effectively promoted the quantitative research of mesoscopic damage. Through the ...

Claims

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