Table 3 Evaluated ranges of rock mass parameters.
|  | Uniaxial compressive strength (MPa) | Joint frequency (m−1) | ||
|---|---|---|---|---|
Lower bound (25th percentile) | Upper bound (75th percentile) | Lower bound (25th percentile) | Upper bound (75th percentile) | |
Group 1 | 14.72 | 31.93 | 1.61 | 2.33 |
Group 2 | 38.62 | 57.70 | 3.15 | 3.87 |
Group 3 | 89.93 | 110.98 | 1.76 | 2.54 |
Group 4 | 73.85 | 92.43 | 2.94 | 3.48 |
