Research Article
A New Method to Estimate the Joint Roughness Coefficient by Back Calculation of Shear Strength
Table 1
10 standard roughness joint profiles [
7].
| | No. | Typical roughness profiles | JRC range | Rock type |
| | 1 | | 0∼2 (0.4) | Slate | | 2 | | 2∼4 (2.8) | Aplite | | 3 | | 4∼6 (5.8) | Gneiss | | 4 | | 6∼8 (6.7) | Granite | | 5 | | 8∼10 (9.5) | Granite | | 6 | | 10∼12 (10.8) | Hornfels | | 7 | | 12∼14 (12.8) | Aplite | | 8 | | 14∼16 (14.5) | Aplite | | 9 | | 16∼18 (16.7) | Hornfels | | 10 | | 18∼20 (18.7) | Soapstone | | SCALE | |
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