Research Article
Comparative Study on Mineral-Scale Microcrack Propagation of Shale under Different Loading Methods
Table 2
Parameters of cohesive elements in minerals (at boundaries of CPE4) and cohesive elements at boundaries of dissimilar minerals.
| Cohesive element | Knn (MPa·m−1) | Kss (MPa·m−1) | Ktt (MPa·m−1) | Tensile strength (MPa) | Shear strength (MPa) |
| In quartz | 120 | 120 | 120 | 6 | 12 | In feldspar | 110 | 110 | 110 | 5 | 10 | In kaolinite | 90 | 90 | 90 | 2 | 4 | In illite | 80 | 80 | 80 | 1 | 2 | At the boundaries of dissimilar minerals | 100 | 100 | 100 | 3 | 6 |
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