Table 10 Intervals of the input parameters of SRC-BN.
Parameter | Intervals |
|---|---|
Rock hardness | |
Intervals [MPa] | (0, 5], (5, 15], (15, 30], (30, 60], (60, 250] |
States | Hard, slightly hard, slightly soft, soft, extremely soft |
Weathering degree | |
Intervals [kr] | [0.2, 0.4], (0.4, 0.6], (0.6, 0.8], (0.8, 0.9], (0.9, 1] |
States | Fresh, slight, medium, severe, extreme |
Rock mass integrity | |
Intervals [Kv] | (0, 0.15], (0.15, 0.35], (0.35, 0.55], (0.55, 0.75], (0.75, 1] |
States | Complete, slightly complete, slightly broken, broken, extremely broken |
Rock mass structure | |
States | Integral/extremely-thick layered, block/thick layered, fractured block/medium-thick layered/interlayer/thin layered/mosaic, fragmented, granular |
Structural plane integrity | |
States | Good, ordinary, bad, very bad |
In-situ stress | |
Intervals [Rc/σmax] | [9, + ∞), [7, 9), [4, 7), (0, 4) |
States | Low, medium, high, extremely high |
Groundwater | |
States | Dry/wet, moist/dripping, rain-like dripping/linear water, tubular water/gushing water |
BQ | |
Intervals | (0, 250], (250, 350], (350, 450], (450, 550], (550, 710] |
States | 5, 4, 3, 2, 1 |
