Research Article
Study and Application of Rock Breaking Mechanism of Concentrated Water Hydraulic Smooth Blasting in Broken Sand-Stone Geological Conditions
Table 6
Detailed hole layout parameters.
| Gun hole name | Detonator section times | Number of gun holes | Hole deep (m) | Row spacing (cm) | Hole spacing (cm) | Angle (°) | Charging factor | Single hole loading capacity (kg) |
| Bottom trenching | 1 | 4 | 1.92 | 425 | 80 | 45 | 0.56 | 1.5 | 3 | 8 | 3.7 | 585 | 40 | 52 | 0.64 | 3 | 5 | 4 | 3.7 | 745 | 80 | 62 | 0.60 | 2.4 | 7 | 4 | 3.7 | 905 | 80 | 78 | 0.47 | 1.8 |
| Upper trenching | 1 | 4 | 1.92 | 425 | 80 | 45 | 0.56 | 1.5 | 3 | 6 | 3.7 | 585 | 50 | 52 | 0.64 | 3 | 5 | 4 | 3.7 | 745 | 80 | 62 | 0.60 | 3 | 7 | 4 | 3.7 | 905 | 80 | 78 | 0.47 | 1.8 |
| Auxiliary hole | 7 | 3 | 3.7 | 80 | 100 | 90 | 0.57 | 2.1 | 9 | 3 | 3.7 | 60 | 130 | 90 | 0.49 | 1.8 | 11 | 7 | 3.7 | 60 | 120 | 90 | 0.49 | 1.8 | 13 | 17 | 3.7 | 50 | 90 | 90 | 0.41 | 1.5 |
| Peripheral holes | 15 | 37 | 3.7 | 60 | 70 | 88 | 0.84 | 1.2 | Base plate hole | 17 | 11 | 3.7 | 85 | 130 | 90 | 0.49 | 1.8 |
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