The picked and scaled fractures of the Phyllites for the rock face of the Valley borehole area are shown in Figure 10. Based on aperture sizes and distance between the discontinuities, four fracture types T1, T2, T3, and T4 were observed, the details of which are provided in Table 5.
Close modal
Table 5
Fracture aperture properties of the Valley borehole area (N = 46 observations)
| Fracture type | Aperture size (mm) | Number of rock discontinuities observed | Total aperture size (mm) | Fracture set porosity (%) | Bulk hydraulic conductivity(m/s) of fracture sets |
|---|---|---|---|---|---|
| T1 | 10 | 2 | 20 | 2.9 | 6.8 |
| T2 | 7 | 2 | 14 | 2.0 | 3.7 × 10−1 |
| T3 | 5 | 12 | 60 | 8.7 | 4.8 |
| T4 | 2 | 32 | 64 | 9.3 | 3.1 × 10−1 |
| Estimated total porosity (%) within scaled rock face | 23 | ||||
| Fracture type | Aperture size (mm) | Number of rock discontinuities observed | Total aperture size (mm) | Fracture set porosity (%) | Bulk hydraulic conductivity(m/s) of fracture sets |
|---|---|---|---|---|---|
| T1 | 10 | 2 | 20 | 2.9 | 6.8 |
| T2 | 7 | 2 | 14 | 2.0 | 3.7 × 10−1 |
| T3 | 5 | 12 | 60 | 8.7 | 4.8 |
| T4 | 2 | 32 | 64 | 9.3 | 3.1 × 10−1 |
| Estimated total porosity (%) within scaled rock face | 23 | ||||
Figure 10
Scaling of foliations and thinly laminated Phyllite beds for estimating fracture porosity and hydraulic conductivity.
Figure 10
Scaling of foliations and thinly laminated Phyllite beds for estimating fracture porosity and hydraulic conductivity.