Investigation on acoustic emission characteristics of fault stick-slip under different lateral pressures
Abstract To explore the effect of different stress environments on fault-slip rockbursts. Bidirectional shear friction experiments with different lateral pressures were conducted on precracked syenogranites buried at 800 m. The macroscopic statistical parameters (cumulative number of AE events, magn...
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| Format: | Article |
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Nature Portfolio
2024-03-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-57076-0 |
| _version_ | 1797247277205553152 |
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| author | Ling Ding Yangfeng Zhao Yishan Pan Yi Fan |
| author_facet | Ling Ding Yangfeng Zhao Yishan Pan Yi Fan |
| author_sort | Ling Ding |
| collection | DOAJ |
| description | Abstract To explore the effect of different stress environments on fault-slip rockbursts. Bidirectional shear friction experiments with different lateral pressures were conducted on precracked syenogranites buried at 800 m. The macroscopic statistical parameters (cumulative number of AE events, magnitude and b value) and local characteristic parameters (amplitude and dominant frequency) of acoustic emission during the stick-slip process under different lateral pressures were investigated. In addition, based on fractal theory, the nonlinear characteristics of AE spectrum were analyzed. On this basis, the microscopic mechanism of fault stick-slip was discussed. The results show that the lateral pressure influences the friction strength of the fault and stick-slip motion characteristics. With increasing lateral pressure, the proportion of transgranular shear fractures increases, which leads to an increase of cumulative number of AE events and magnitude. The periodic decrease in the b value is more significant at high lateral pressure. There is a good correlation between a high-magnitude AE event and a stress drop. The AE frequency with phased response characteristics can be used to effectively identify the evolution of fault stick-slip instability at the laboratory scale. A sharp increase in the amplitude of the dominant frequency can be regarded as one of the precursory features of fault stick-slip instability. The AE frequency spectra have multifractal characteristics, that differ among the different stages. The maximum multifractal dimension and spectral width can reflect the difference in energy released during fault stick-slip motion. |
| first_indexed | 2024-04-24T19:56:08Z |
| format | Article |
| id | doaj.art-8fd3aefbff364eebafc9a12a4a2a7f50 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-24T19:56:08Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-8fd3aefbff364eebafc9a12a4a2a7f502024-03-24T12:19:24ZengNature PortfolioScientific Reports2045-23222024-03-0114112210.1038/s41598-024-57076-0Investigation on acoustic emission characteristics of fault stick-slip under different lateral pressuresLing Ding0Yangfeng Zhao1Yishan Pan2Yi Fan3School of Mechanics and Engineering, Liaoning Technical UniversitySchool of Mechanics and Engineering, Liaoning Technical UniversitySchool of Mechanics and Engineering, Liaoning Technical UniversitySchool of Mechanics and Engineering, Liaoning Technical UniversityAbstract To explore the effect of different stress environments on fault-slip rockbursts. Bidirectional shear friction experiments with different lateral pressures were conducted on precracked syenogranites buried at 800 m. The macroscopic statistical parameters (cumulative number of AE events, magnitude and b value) and local characteristic parameters (amplitude and dominant frequency) of acoustic emission during the stick-slip process under different lateral pressures were investigated. In addition, based on fractal theory, the nonlinear characteristics of AE spectrum were analyzed. On this basis, the microscopic mechanism of fault stick-slip was discussed. The results show that the lateral pressure influences the friction strength of the fault and stick-slip motion characteristics. With increasing lateral pressure, the proportion of transgranular shear fractures increases, which leads to an increase of cumulative number of AE events and magnitude. The periodic decrease in the b value is more significant at high lateral pressure. There is a good correlation between a high-magnitude AE event and a stress drop. The AE frequency with phased response characteristics can be used to effectively identify the evolution of fault stick-slip instability at the laboratory scale. A sharp increase in the amplitude of the dominant frequency can be regarded as one of the precursory features of fault stick-slip instability. The AE frequency spectra have multifractal characteristics, that differ among the different stages. The maximum multifractal dimension and spectral width can reflect the difference in energy released during fault stick-slip motion.https://doi.org/10.1038/s41598-024-57076-0Fault stick-slipAcoustic emissionFractal characteristicsLateral pressure |
| spellingShingle | Ling Ding Yangfeng Zhao Yishan Pan Yi Fan Investigation on acoustic emission characteristics of fault stick-slip under different lateral pressures Scientific Reports Fault stick-slip Acoustic emission Fractal characteristics Lateral pressure |
| title | Investigation on acoustic emission characteristics of fault stick-slip under different lateral pressures |
| title_full | Investigation on acoustic emission characteristics of fault stick-slip under different lateral pressures |
| title_fullStr | Investigation on acoustic emission characteristics of fault stick-slip under different lateral pressures |
| title_full_unstemmed | Investigation on acoustic emission characteristics of fault stick-slip under different lateral pressures |
| title_short | Investigation on acoustic emission characteristics of fault stick-slip under different lateral pressures |
| title_sort | investigation on acoustic emission characteristics of fault stick slip under different lateral pressures |
| topic | Fault stick-slip Acoustic emission Fractal characteristics Lateral pressure |
| url | https://doi.org/10.1038/s41598-024-57076-0 |
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