¶ Использование
Используется для расчет Q в системе Q
¶ Определение рейтинга
| Количество систем трещин | Рейтинг Jn |
|---|---|
| Massive, no or few joints | 0.5-1 |
| One joint set | 2 |
| One joint set plus random | 3 |
| Two joint sets | 4 |
| Two joint sets plus random | 6 |
| Three joint sets | 9 |
| Three joint sets plus random | 12 |
| Four or more joint sets, random, heavily jointed, "sugar cube", etc. | 15 |
| Crushed rock, earthlike | 20 |
