Research Article
Research on the Seam Formation Mechanism of Elliptical Bipolar Linear Directional Blasting Based on the SPH-FEM Coupling Method
Table 5
Design parameters of ordinary blasting.
| | Type of borehole | Depth of hole (m) | Number | Charge of a borehole (kg) | The total amount of explosives (kg) | Borehole utilization (%) | Degree of rock fragmentation (cm) | Excavated area (m2) |
| | Cutting undermine | 3.0 | 8 | 2.0 | 16 | 90 | 36 | 68.2 | | Cut spreader hole | 2.5 | 8 | 1.8 | 14.4 | | Satellite hole | 2.5 | 27 | 1.4 | 37.8 | | Inner hole | 2.5 | 20 | 1.3 | 26 | | Periphery hole | 2.5 | 42 | 0.6 | 25.2 | | Bottom outlet | 2.6 | 14 | 1.6 | 22.4 | | Total | | 119 | | 141.8 |
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