We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Mesoscopic Damage and Fracture Characteristics of Hard Rock under High-Frequency Ultrasonic Vibration Excitation.
- Authors
Zhang, Lei; Wang, Xufeng; Niu, Zhijun
- Abstract
Ultrasonic high-frequency vibrational fracture technology can compensate for the deficiencies of traditional fracture methods and has promising applications in underground rock drilling engineering. In this study, ultrasonic high-frequency vibrational tests were performed on brittle fine-grained red sandstone in combination with CT real-time scanning, which revealed mesoscopic fracture processes in the rock. Digital image processing technology is used to identify and extract the pores of CT images, and the pore evolution law of rock slices at different layers under ultrasonic vibration excitation is quantitatively studied. The results show that the increase in porosity decreases with increasing distance from the excitation surface, with the lowest layers of the rock showing an increase in porosity of only 0.22%. In addition, a mechanical model of rock breaking by ultrasonic vibrations was derived to explain the non-uniform damage mechanism of rock space under ultrasonic vibration excitation.
- Subjects
ROCK music; ROCK deformation; DIGITAL image processing; ULTRASONICS; ROCK concerts; ULTRASONIC equipment; COMPUTED tomography; CURRENT transformers (Instrument transformer)
- Publication
Applied Sciences (2076-3417), 2023, Vol 13, Issue 22, p12424
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app132212424