Research Article
Study of SCA-Induced Rock Crack Propagation under Different Stress Conditions Using a Modified Cohesive Element Method
Table 3
The P-l linear fit equations under the conditions of σ1 = σ3.
| Confining stress (MPa) | P-l linear fitting equations | Adjusted R2 | Expansion pressure of crack initiation, P0 (MPa) |
| 5 | l = 11.908P − 197.95429 | 0.94012 | 16.6236 | 7.5 | l = 7.09694P − 144.0286 | 0.95673 | 20.2945 | 10 | l = 5.33562P − 129.77332 | 0.96778 | 24.3221 | 12.5 | l = 4.12966P − 122.09284 | 0.96812 | 29.5647 | 15 | l = 3.52583P − 122.94985 | 0.97831 | 34.8712 | 17.5 | l = 2.71927P − 99.53406 | 0.9667 | 36.6032 | 20 | l = 2.18073P − 82.53101 | 0.97728 | 37.8456 |
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