Research Article
Frequency Spectrum and Wavelet Packet Analyses of Blasting Vibration Signals for Different Charge Structures in Blasting Peripheral Holes
Table 3
Energy proportion of 8 frequency bands within 250 Hz.
| | Usual charge | 1 (0–31.25 Hz) | 2 (31.25–62.5 Hz) | 3 (62.5–93.75 Hz) | 4 (93.75–125 Hz) | | 8.77% | 13.13% | 3.38% | 11.11% | | 5 (125–156.25 Hz) | 6 (156.25–187.5 Hz) | 7 (187.5–218.75 Hz) | 8 (218.75–250 Hz) | | 2.76% | 4.29% | 7.73% | 5.02% |
| | Cutting seam charge | 1 (0–31.25 Hz) | 2 (31.25–62.5 Hz) | 3 (62.5–93.75 Hz) | 4 (93.75–125 Hz) | | 4.11% | 1.56% | 1.09% | 1.05% | | 5 (125–156.25 Hz) | 6 (156.25–187.5 Hz) | 7 (187.5–218.75 Hz) | 8 (218.75–250 Hz) | | 0.92% | 1.66% | 2.71% | 2.30% |
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