Experimental Investigations into the Effects of Lithology on Acoustic Emission
In order to study how lithology affects acoustic emissions (AE), a series of tunnel rock burst simulation experiments, monitored by acoustic emission instruments, were conducted on granite, marble and basalt. By analyzing the characteristic parameters, this study found that AE events occur more fr...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Eastern Macedonia and Thrace Institute of Technology
2015-11-01
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| Series: | Journal of Engineering Science and Technology Review |
| Subjects: | |
| Online Access: | http://www.jestr.org/downloads/Volume8Issue3/fulltext83282015.pdf |
| Summary: | In order to study how lithology affects acoustic emissions (AE), a series of tunnel rock burst simulation experiments,
monitored by acoustic emission instruments, were conducted on granite, marble and basalt. By analyzing the
characteristic parameters, this study found that AE events occur more frequently during the rock burst process on granite
and basalt. Marble remains dormant until 75% of the loading time before the peak, at which point, cracks develop rapidly
and AE events dramatically increase. During the rock burst process, the AE energy release demonstrates that low energy
is released in the incubation phase and robust energy is released during the later phase. Before the rock burst occurs,
increased in the heterogeneity index Cv values of the AE event are subject to lithology. The Cv values of granite and
basalt have an increase of about 0.2-0.4, while marble shows an increase of 1.0-1.2. The heterogeneity index Cv value of
an AE event is in line with the rock burst process. |
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| ISSN: | 1791-2377 1791-2377 |