Rock damage test experiment table under ultrasonic vibration

Abstract

The invention discloses a rock damage test experiment table under ultrasonic vibration. The experiment table comprises a guide fixing mechanism, a rock clamping mechanism, a hydraulic pressurization mechanism, an ultrasonic vibration mechanism, a rock amplitude measurement system, a sound emission measurement system and an infrared feature measurement system. According to the rock damage test experiment table under the ultrasonic vibration built by utilizing an amplitude detection technology, a sound emission technology and an infrared detection technology, dynamic testing of rock internal crack development, rock internal stress change, an attenuation condition of a stress wave in a rock and effective rock crushing depth can be realized; and the damage process of the rock under the ultrasonic vibration can be comprehensively tested in multiple aspects, and optimal rock crushing parameters under the ultrasonic action, including a frequency, a static pressure, an amplitude and the like are determined, so that the defects and the errors of a single detection method are reduced, the experiment efficiency is improved, favorable support is provided for the research of an ultrasonic rockcrushing mechanism, and the experiment table has the advantages of being accurate, convenient and economical.

Description

technical field The invention relates to the fields of geological core drilling and rock breaking mechanism research by ultrasonic vibration, in particular to an experimental platform for rock damage testing under ultrasonic vibration. Background technique The use of ultrasonic technology to solve the problem of hard rock crushing is considered to have broad application prospects. Many scientific research institutions and scholars have used ultrasonic technology to build indoor experimental platforms to carry out indoor experimental research, and have achieved good test results and obtained many awards. patent. For example, the ultrasonic drilling sampler developed by NASA, the piezoelectric ceramic vibration drilling prototype developed by Nanjing University of Aeronautics and Astronautics, an invention patent applied by Jilin University: an experimental device and method for ultrasonic vibration rock breaking, Northeast Petroleum University An invention patent applied for...

AI Technical Summary

Problems solved by technology

However, the above-mentioned test platforms or patents mainly focus on the influence of macro factors such as rotational speed, frequency, and static pressure on the ROP, and there are deficiencies in the testing of rock damage characteristics under the action of ultrasonic vibration. This patent integrates acoustic emission technology, infrared detection technology, Integrate the surface micro-amplitude detection technology into one, and design a new comprehensive experimental device that can realize real-time monitoring of the internal crack expansion, stress wave attenuation, and rock internal stress distribution under the action of ultrasonic vibration.

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