Research Article
Study of Testing Method for Dynamic Initiation Toughness of Sandstone under Blasting Loading
Table 4
Fracture toughness value for different specimens.
| | Specimen number | Location associated with the backcalculation | Initiation fracture toughness (MPa·m1/2) | Average value (MPa·m1/2) |
| | 1 | Gauge 5 | 4.73 | 4.95 | | Gauge 7 | 5.16 |
| | 2 | Gauge 5 | 5.06 | 5.48 | | Gauge 7 | 5.89 |
| | 3 | Gauge 5 | 4.83 | 5.15 | | Gauge 7 | 5.46 |
| | 4 | Gauge 5 | 4.82 | 4.79 |
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