Research Article
Vibration Signal Analysis of Water Seal Blasting Based on Wavelet Threshold Denoising and HHT Transformation
Table 7
Dust suppression effect of the four charge structures.
| | Charge structure | Filter membrane quality before sampling (g) | Filter membrane quality after sampling (g) | Difference (g) | Dust concentration (mg/m3) |
| | Conventional charge structure | 1.994 | 2.184 | 0.190 | 158.75 | | Water interval charge at the hole bottom | 1.922 | 2.091 | 0.169 | 140.83 | | Water interval charge at the orifice | 1.903 | 2.062 | 0.159 | 132.50 | | Water interval charge at both ends | 1.990 | 2.151 | 0.161 | 134.17 |
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