岩性f值 | 0.8~2 | 3~4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
Q (kg/m3) | 0.4 | 0.43 | 0.46 | 0.5 | 0.53 | 0.56 | 0.6 | 0.64 | 0.67 | 0.67 |