Research Article
Evaluating Long-Term Strength and Time to Failure of Sandstone with Different Initial Damage
Table 7
Average creep parameters of rock specimens with different initial damage under different stress levels.
| | Creep stress (MPa) | E1 (GPa) | E2 (GPa) | η1 (GPa·h) | η2 (GPa·h) |
| | 15.7 | 14.7 | 241.4 | — | 453.9 | | 19.6 | 11.8 | 143.5 | — | 401.1 | | 23.5 | 10.5 | 106.9 | — | 257.8 | | 27.4 | 9.3 | 80.0 | 3806.8 | 141.1 | | 29.4 | 8.3 | 63.5 | 2789.9 | 125.3 | | 31.4 | 8.0 | 49.1 | 1814.5 | 90.8 |
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