Detection system and method for evaluating damage condition of rocks and cementing materials

Abstract

The invention discloses a detection system and method for evaluating the damage condition of rocks and cementing materials, and belongs to the technical field of material detection. The detection system comprises a vibration excitation system and a signal acquisition and processing system. The detection method comprises the following steps of: 1, selecting or processing a metal rod piece for detection to make the metal rod piece a hollow pipe or a rod piece with a through groove; 2, arranging a frequency sensor used for collecting vibration signals in the hollow part or the through groove of the metal rod piece; 3, coupling the metal rod piece with a detected medium; 4, detecting a vibration signal; 5, identifying the effective waveform by using a signal acquisition module and a signal processing module in the signal acquisition and processing system, and calculating a corresponding frequency value; and 6, acquiring the damage degree of the medium according to the frequency-damage degree / strength relationship in an implantation system. According to the invention, the vibration frequency of the rod piece coupled with the material medium is utilized to invert the damage or strength change of the material medium.

Description

technical field [0001] The invention relates to a damage or strength detection technology for rock and gel materials, and belongs to the technical field of rock and gel materials detection. Background technique [0002] In the field of underground engineering, the damage / strength detection of rock or rock-like materials is of great significance for the design of roadway support and the stability assessment of building structures. At present, the common damage / strength detection methods of rock or rock-like materials mainly include deformation modulus method, stress-strain method, ultrasonic velocity, and dissipated energy. However, the above methods are often difficult to achieve in-situ and non-destructive testing. Among them, Ultrasonic methods and other methods are greatly disturbed by the environment and difficult to test. [0003] In addition, it is also difficult for the above method to go deep into the medium to detect damage / strength at different positions. At pres...

AI Technical Summary

Problems solved by technology

At present, the common damage / strength detection methods of rock or rock-like materials mainly include deformation modulus method, stress-strain method, ultrasonic velocity, and dissipated energy. However, the above methods are often difficult to achieve in-situ and non-destructive testing. Among them, Ultrasonic methods and other methods are greatly disturbed by the environment and difficult to test

[0003] In addition, the above methods are also difficult to penetrate deep into the medium to detect damage / strength at different positions

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