Table 1 Triaxial loading test scheme.
Sample number | Confining pressure /MPa | \(\alpha\)/° | \(\beta\)/° | Loading speed /mm/s |
|---|---|---|---|---|
R-1 | 20 | 20 | 15 | 0.003 |
R-2 | 20 | 25 | 20 | 0.003 |
R-3 | 20 | 30 | 25 | 0.003 |
R-4 | 10 | 30 | 25 | 0.003 |
R-5 | 30 | 30 | 25 | 0.003 |
R-6 | 20 | 30 | 25 | 0.005 |
R-7 | 20 | 30 | 25 | 0.01 |
