Experimental Study of Damage Development in Salt Rock under Uniaxial Stress Using Ultrasonic Velocity and Acoustic Emissions
Abstract
:1. Introduction
2. Experimental Apparatus and Procedure
2.1. Experimental Apparatus
2.2. Test Sample
2.3. Test Procedures
3. Experimental Results
3.1. Deformation Features
3.2. Ultrasonic Wave Velocity
3.3. AE Activity
4. Rock Damage Recognition
4.1. Ultrasonic Velocity Ratio
4.2. Ib-Value
4.3. r-Value
5. Discussion
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Sample Number | Uniaxial Compression Strength/MPa | Damage Strength/% | Dilatancy Dtrength/% |
---|---|---|---|
SA-1 | 19.5 | 42.5 | 62.6 |
SA-2 | 16.4 | 45.0 | 66.4 |
SA-3 | 18.2 | 49.7 | 63.1 |
Mean value | 18.0 | 45.7 | 64.0 |
Standard deviation | 1.56 | 3.66 | 2.04 |
Sample Number | AE Event Percentage/% | Event Sum | ||||
---|---|---|---|---|---|---|
Stage 1 | Stage 2 | Stage 3 | Stage 4 | Stage 5 | ||
1 | 0.06 | 3.04 | 14.4 | 71.9 | 10.6 | 6904 |
2 | 0.05 | 2.21 | 11.9 | 79.4 | 6.4 | 7751 |
3 | 0.02 | 2.74 | 15.1 | 74.5 | 7.6 | 8233 |
Mean value | 0.04 | 2.66 | 13.8 | 75.27 | 8.23 | 7629 |
Standard deviation | 0.02 | 0.42 | 1.68 | 3.81 | 2.16 | 673 |
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Li, H.; Dong, Z.; Yang, Y.; Liu, B.; Chen, M.; Jing, W. Experimental Study of Damage Development in Salt Rock under Uniaxial Stress Using Ultrasonic Velocity and Acoustic Emissions. Appl. Sci. 2018, 8, 553. https://doi.org/10.3390/app8040553
Li H, Dong Z, Yang Y, Liu B, Chen M, Jing W. Experimental Study of Damage Development in Salt Rock under Uniaxial Stress Using Ultrasonic Velocity and Acoustic Emissions. Applied Sciences. 2018; 8(4):553. https://doi.org/10.3390/app8040553
Chicago/Turabian StyleLi, Haoran, Zhikai Dong, Yun Yang, Bo Liu, Mingyi Chen, and Wenjun Jing. 2018. "Experimental Study of Damage Development in Salt Rock under Uniaxial Stress Using Ultrasonic Velocity and Acoustic Emissions" Applied Sciences 8, no. 4: 553. https://doi.org/10.3390/app8040553