Research Article
Study of Testing Method for Dynamic Initiation Toughness of Sandstone under Blasting Loading
Table 2
Location of strain gauge point and test value.
| Specimen number | Strain gauge number | | Strain time parameters (μs) | Peak strain (με) | Start time | Peak time | End time | Loading time | Unloading time |
| 1 | Gauge 4 | 16 | 20.5 | 22.8 | 61.4 | 2.3 | 38.6 | 11055 | Gauge 5 | 32 | 38.6 | 40.3 | 180 | 1.7 | 139.7 | 4795 | Gauge 6 | 56 | 67.2 | 69.3 | 124.7 | 3.3 | 55.4 | 2496 | Gauge 7 | 32 | 37.4 | 39.1 | 156.1 | 1.7 | 117 | 5559 |
| 2 | Gauge 4 | 16 | 20.7 | 22 | 41.1 | 1.3 | 19.1 | 11660 | Gauge 5 | 32 | 38.9 | 40.6 | 144.3 | 1.7 | 103.7 | 5441 | Gauge 6 | 56 | 67.5 | 69.3 | 123.8 | 1.8 | 54.5 | 3001 | Gauge 7 | 32 | 36 | 39.7 | 156.9 | 3.7 | 117.2 | 5467 |
| 3 | Gauge 4 | 16 | 20.5 | 22.9 | 54.6 | 2.4 | 31.7 | 13590 | Gauge 5 | 32 | 38.5 | 40.3 | 123.2 | 1.8 | 82.9 | 4648 | Gauge 6 | 56 | 67.1 | 71.7 | 125.6 | 4.6 | 53.9 | 2839 | Gauge 7 | 32 | 40.4 | 42.1 | 157.4 | 1.7 | 115.3 | 5600 |
| 4 | Gauge 4 | 16 | 20.9 | 22.6 | 43.9 | 1.7 | 21.3 | 14130 | Gauge 5 | 32 | 38.7 | 41.5 | 163.7 | 2.8 | 122.2 | 5284 | Gauge 6 | 56 | 68.5 | 70.7 | 131.4 | 2.2 | 60.7 | 2873 | Gauge 7 | 32 | 38.7 | 40.6 | 164 | 1.9 | 123.4 | 5593 |
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