Research Article
Investigation of Relation between Fracture Scale and Acoustic Emission Time-Frequency Parameters in Rocks
Table 3
Corresponding acoustic emission characteristics of different fracture scale cracks.
| | Crack scale | value | Types of AE signal | Dominant frequency/khz | Absolute energy/aJ |
| | Large scale cracks | 0.6648 | Low frequency and high energy | Low frequency
(41 khz, 92 khz, and 103 khz) | High energy (1.15 × 109) | | Small scale cracks | 0.4028 | Medium/high frequency and low energy | Medium/high frequency
(150 khz, 175 khz, and 275 khz) | Low energy (9.20 × 106) |
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