Parameter | Min | Max | Ave | |
GSI | 40 | 50 | 45 | |
Intact uniaxial compressive strength (Mpa) | 50 | 100 | 75 | |
Mi | 11 | 23 | 17 | |
Material constants | mb | 0.154 | 1.754 | 0.828 |
S | 0.0001 | 0.0014 | 0.0003 | |
A | 0.478 | 0.612 | 0.508 | |
Cohesion (Mpa) | 0.210 | 0.501 | 0.442 | |
Friction angle (deg) | 62.87 | 90.63 | 47.85 | |
Rock mass parameter (Mpa) | Tensile strength | −0.019 | −0.08 | −0.031 |
Uniaxial compressive strength | 0.096 | 2.68 | 1.307 | |
Global strength | 6.98 | 10.67 | 8.816 | |
Modulus of deformation | 600.75 | 1000.5 | 854.68 |