Research Article
A Study on Cut Blasting with Large Diameter Charges in Hard Rock Roadways
Table 9
Comparative data of blasting effects.
| No. | Cut blasting with small diameter charge | Cut blasting with large diameter charge | Footage (m) | Utilization rate of blast hole (%) | Footage (m) | Utilization rate of blast hole (%) |
| 1 | 1.95 | 81.3 | 2.20 | 91.7 | 2 | 1.90 | 79.2 | 2.20 | 91.7 | 3 | 1.90 | 79.2 | 2.15 | 89.6 | 4 | 1.90 | 79.2 | 2.25 | 93.8 | 5 | 1.85 | 77.1 | 2.15 | 89.6 | 6 | 1.90 | 79.2 | 2.20 | 91.7 | 7 | 1.95 | 81.3 | 2.25 | 93.8 | 8 | 1.85 | 77.1 | 2.20 | 91.7 | 9 | 1.85 | 77.1 | 2.15 | 89.6 | 10 | 1.90 | 79.2 | 2.25 | 93.8 | 11 | 1.95 | 81.3 | 2.20 | 91.7 | 12 | 1.90 | 79.2 | 2.20 | 91.7 | Average | 1.90 | 79.2 | 2.20 | 91.7 |
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