Experimental method and system for measuring fracture changes during shearing of rock joint surfaces
A technology of rock joints and shearing process, applied in measuring devices, using stable shearing force to test material strength, instruments, etc., can solve the problem of rough rock joint surface, difficult to accurately measure the separation degree of upper and lower joint surfaces, and hinder rock joints. Surface shear seepage research and other issues
Active Publication Date: 2021-02-02
SUN YAT SEN UNIV
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Problems solved by technology
Due to the roughness of the rock joint surface, and the rock joint surface is accompanied by roughness damage and deformation during the shearing process, it is difficult to accurately measure the separation degree of the upper and lower joint surfaces by existing conventional testing methods, which hinders the shear seepage of the rock joint surface. further research on
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[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, vertical, counterclockwise, clockwise, circumferential) in the embodiment of the present invention direction, radial direction, axial direction...), the directional indication is only used to explain the relative positional relationship, movement conditions, etc. When a change occurs, the directional indication changes accordingly. ...
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The experimental method for measuring the change of cracks in the shearing process of rock joint surfaces provided by the present invention comprises the steps: S1. providing rock samples divided into upper rock blocks and lower rock blocks by the cracks, and comparing the upper rock blocks and the lower rock blocks respectively Carry out three-dimensional scanning to obtain the height Z of each point at the joint surface of the upper rock block and the lower rock block; S2. Fit the joint surfaces of the upper rock block and the lower rock block completely, and apply shear force to drive the upper rock block and the lower rock block Relative displacement occurs along the joint surface; S3. One of the upper side of the upper rock block and the lower side of the lower rock block is provided with an array sound wave emitting device, and the other of the upper side of the upper rock block and the lower side of the lower rock block corresponds to An array sound wave receiving device is provided; the sound wave emitted by the array sound wave emitting device is received by the array sound wave receiving device facing it, and the longitudinal sound wave transmission time t is obtained; S4. Calculate and obtain the displacement of the joint surface between the upper rock block and the lower rock block Crack size. The present invention also provides an experimental system for realizing the above experimental method.
Description
technical field [0001] The invention relates to the technical field of rock mechanics tests for geothermal mining, in particular to a true triaxial rock seepage test loading device based on geothermal mining and a test system with the same. Background technique [0002] A joint is a small fracture structure in which the rock blocks on both sides have no significant displacement after the rock mass is fractured by force. The shear characteristics of rock joint surfaces are of great significance to many projects (underground space excavation, slope design, shale gas exploitation, geothermal exploitation, nuclear waste underground storage, etc.). At present, most testing methods and testing techniques are mainly aimed at measuring the shear strength of rock joint surfaces, and there are few tests for the size of crack cavities in rock joint surfaces during shearing. [0003] The size of the fracture cavity during the shearing process of the rock joint surface is of great signi...
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IPC IPC(8): G01N3/06G01N3/24
CPCG01N3/06G01N3/24G01N2203/0066G01N2203/0658G01N2203/0682
Inventor 叶皆显党文刚黄林冲刘建坤马建军陈俊鹏
Owner SUN YAT SEN UNIV