Research Article
Laboratory Investigation on the Effects of Natural Fracture on Fracture Evolution of Granite Exposed to Freeze-Thaw-Cyclic (FTC) Loads
Table 2
Frequency spectrum characteristics of the tested granite sample during whole fracture process.
| | Sample ID | Initial damage degree (%) | Low frequency (kHz) | Median frequency (kHz) | High frequency (kHz) |
| | NFG-34 | 0.19% | (5,135) | (160,210) | (245,255) | | NFG-24 | 0.15% | (5,135) | (106,208) | (245,255) | | NFG-21 | 0.13% | (5,135) | (155,210) | (245,255) | | NFG-30 | 0.11% | (0,90) | (110,200) | (245,255) |
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