Method and device for synchronously measuring rock sound wave and acoustic emission

Abstract

The invention discloses a method and a device for synchronously measuring rock sound wave and acoustic emission. The method comprises the following steps: A, putting sealing pressing ends for transmitting and receiving a sound wave signal at two ends of a rock sample, and keeping a longitudinal wave probe and a transverse wave probe inside the sealing pressing ends identical in the vertical direction; B, arranging and fixing an acoustic emission receiving probe outside the rock test sample; C, starting a sound wave and acoustic emission testing system, and starting a rock pressure machine for a loading experiment till the rock sample is damaged; D, performing aftertreatment on acquired data to obtain the number and the position and the ultrasonic speed change information of acoustic emission events of the rock; and E, respectively connecting a sound wave testing device and an acoustic emission testing device with experiment pressure machine base adapters, and connecting with a data acquisition and processing system through corresponding adapters. The method is feasible and simple and convenient to operate, synchronous acquisition of sound wave and acoustic emission information in rock mechanics tests is achieved, and positioning of a rock acoustic emission position is achieved.

Description

technical field [0001] The invention belongs to the field of rock mechanics laboratory tests, and more specifically relates to a measurement method for integrated dynamic monitoring of rock ultrasonic wave velocity and acoustic emission changes in mechanical experiments, and also relates to an integrated dynamic monitoring of rock ultrasonic wave velocity and acoustic emission in mechanical experiments. The device for measuring the change of acoustic emission is suitable for the synchronous monitoring of rock acoustic wave and acoustic emission state during uniaxial compression experiment and triaxial compression experiment of rock mechanics. Background technique [0002] Engineering safety is a major issue related to people's lives and property safety. The instability of rock masses such as mines, tunnels, and water conservancy projects will cause heavy casualties, economic losses, and environmental damage. Therefore, understand the damage mechanism of rocks and identify roc...

AI Technical Summary

Problems solved by technology

As early as the 1980s, scholars at home and abroad began to study the laws of rock acoustic waves and acoustic emission. However, due to the constraints of the test equipment, the wave velocity test and acoustic emission test of rocks were carried out separately.

On the one hand, this has caused a waste of economy and time, and on the other hand, it has cut off the research on the wave velocity and the law of acoustic emission in the process of rock fracture. Therefore, it is of great significance to develop a set of devices for synchronously monitoring rock acoustic waves and the law of acoustic emission.

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