Research Article
Study on Ultrasonic Characteristics and Prediction of Rock with Different Pore Sizes
Table 2
Variation of the attenuation coefficient of rock samples with different pore sizes before and after drilling at 100 kHz.
| | Rock sample number | Aperture size (mm) | Longitudinal wave velocity before drilling (m/s) | Longitudinal wave velocity after drilling (m/s) | Wave velocity difference (m/s) |
| | A1 | 10 | 2427 | 2330 | 97 | | A2 | 15 | 2428 | 2322 | 106 | | A3 | 20 | 2414 | 2315 | 99 | | A4 | 25 | 2417 | 2285 | 132 | | A5 | 30 | 2410 | 2243 | 167 |
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