Research Article
Hollow Effect of Ground Vibration Induced by Electronic Detonator in Shallow Tunnel
Table 3
Averages and standard deviations of dominant frequency.
| Monitoring distance (m) | X-axis average (Hz) | X-axis standard deviation | Y-axis average (Hz) | Y-axis standard deviation | Z-axis average (Hz) | Z-axis standard deviation |
| 0 | 84.523 | 16.460 | 80.868 | 16.459 | 95.971 | 28.262 | −10 | 66.572 | 1.155 | 88.036 | 31.370 | 88.297 | 31.185 | +10 | 66.939 | 0.529 | 65.989 | 0.372 | 66.430 | 0.964 | −20 | 67.381 | 1.407 | 66.589 | 0.664 | 66.667 | 0.291 | +20 | 66.751 | 0.718 | 65.954 | 0.547 | 66.065 | 0.478 | −30 | 68.808 | 0.768 | 66.856 | 0.714 | 66.105 | 0.516 | +30 | 67.221 | 0.437 | 66.962 | 1.367 | 67.027 | 1.899 |
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