Research Article
A New Mathematical Model for Predicting the Surface Vibration Velocity on the Step Topography
Table 1
Blasting design parameters.
| | Item | Parameter |
| | Bench height (m) | 12∼15 | | Hole depth (m) | 14∼17.5 | | Hole diameter (mm) | 310 | | Subdrilling (m) | 2∼2.5 | | Filling length (m) | 7∼8 | | Row spacing (m) | Mineral | 7∼8 | | Rock | 5∼9 | | Hole spacing (m) | Mineral | 6∼7 | | Rock | 4∼8 | | Explosive type | ANFO | | Detonation mode | Hole-by-hole initiation | | Detonator | Millisecond nonel detonator | | Charge structure | Interval charging |
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