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Acoustic emission test device for rock mechanics direct shear process

A testing device and rock mechanics technology, applied in the direction of measuring devices, scientific instruments, instruments, etc., can solve the problems of testing, inability to perform high-precision, and lack of analysis system devices

Inactive Publication Date: 2013-07-17
ANHUI UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0011] The purpose of the present invention is to solve the following problems that the existing rock mechanics direct shear tester does not have an acoustic emission testing device: the data of the test is obtained through a pressure gauge, and there is no analysis system device, so high-precision testing cannot be carried out; The internal damage of the test block cannot be monitored dynamically in real time; the distribution of the internal damage area of ​​the test piece cannot be observed, but only the result of the damage can be obtained; Time-varying relationships cannot be reflected

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  • Acoustic emission test device for rock mechanics direct shear process
  • Acoustic emission test device for rock mechanics direct shear process
  • Acoustic emission test device for rock mechanics direct shear process

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Embodiment Construction

[0021] In order to further understand the content of the invention, features and effects of the present invention, the following examples are given hereby, and the accompanying drawings are described in detail as follows: First, a group of sandstone samples are selected, and the collected sandstone samples are processed into cube specimens with a length, width, and height of 40mm by wet processing method. The surface of the test piece is graded and polished with sandpaper, so that the flatness error of each end surface is controlled within 0.02mm. The test considered three different water states with saturation degrees of 0%, 50% and 100%, respectively. According to the requirements of the relevant test specifications, the specific treatment methods for the specimens in three typical water-containing states are as follows: (a) The saturation is 0%: put the specimen in an oven at 105°C for 48 hours; (b) The saturation is 50% : Take the saturated water content as the standard, ...

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Abstract

The invention relates to a device for rock mechanics direct shear test, in particular to an acoustic emission test device for the rock mechanics direct shear process, in order to solve the problem that damaged microstructure and energy loss of rock cannot be analyzed as an existing rock mechanics direct shear tester does not perform acoustic emission test. The acoustic emission test device mainly comprises an upper pressure head, a base, a horizontal pressure head, a lower shear box, a shear ring, a test piece, a force transmission iron briquette, an upper shear box, sensors and the like, and is characterized in that the upper pressure head and the horizontal pressure head load normal and horizontal force respectively, the lower shear box is placed on the base, the test piece can be placed in the shear ring inside the lower shear box, the force transmission iron briquette is arranged in the upper shear box, and the sensors contact with the test piece through slots inside the upper shear box, the lower shear box and the shear ring. Thus, when a tester performs shear test according to structural features thereof, a time-varying correlation diagram about impact number, shear force, energy accumulation and the like is created via the acoustic emission test device, and strength and property of the test piece can be known from microstructure.

Description

technical field [0001] The invention relates to an acoustic emission testing device for a rock mechanics direct shear test process, which is suitable for the acoustic emission test in the direct shear test process of rocks taken out from mines, tunnels and underground engineering. Background technique [0002] Underground mine roof fall, roof and floor water inrush, rock burst and other disasters and accidents occur from time to time, causing great harm to the life and property of the country and people. The occurrence of these disasters and accidents is closely related to rock mass rupture and instability. When the rock material bears the load, there will be a local elastic-plastic energy concentration phenomenon inside it. When the energy accumulates to a certain critical value, it will cause the generation and expansion of micro-cracks, which will inevitably be accompanied by the rapid expansion of elastic waves or stress waves in the surrounding rock mass. release and sp...

Claims

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Application Information

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IPC IPC(8): G01N3/06
Inventor 彭瑞赵光明孟祥瑞赵华安徐雪战张小波段传鑫杨敏
Owner ANHUI UNIV OF SCI & TECH
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