Research Article
Experimental Investigations on Rheological Properties of Mudstone in Kilometer-Deep Mine
Table 6
Confining pressure effect coefficients.
| | Confining pressure | σ3 (MPa) | 5 | 10 | 15 | 20 |
| | Peak strength | σ1 (MPa) | 68.27 | 90.4 | 106.41 | 128.43 | | Confining pressure effect coefficient | β | 6.20 | 5.31 | 4.61 | 4.56 |
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