Table 3 HF stress measurements in the Shuichang iron mine.
From: Comparison and evaluation of overcoring and hydraulic fracturing stress measurements
Borehole | No | Depth (m) | Pressure parameters (MPa) | Principal stresses (MPa) | σH direction | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Pb | Pr | Ps | P0 | T | σH | σh | σv | ||||
BH-1 | 1 | 83.66 | 2.83 | 2.08 | 1.66 | 0.74 | 0.76 | 2.16 | 1.66 | 2.21 | / |
2 | 116.37 | 5.93 | 4.50 | 4.08 | 1.06 | 1.43 | 6.68 | 4.08 | 3.07 | N77.0°E | |
3 | 155.68 | 12.57 | 7.57 | 6.98 | 1.44 | 5.00 | 11.93 | 6.98 | 4.11 | N88.0°E | |
4 | 181.83 | 12.91 | 9.13 | 7.83 | 1.70 | 3.78 | 12.65 | 7.83 | 4.80 | / | |
BH-2 | 1 | 265.48 | 9.11 | 6.59 | 5.96 | 2.01 | 2.52 | 9.28 | 5.96 | 7.02 | / |
2 | 274.81 | 11.72 | 6.89 | 6.26 | 2.10 | 4.83 | 9.79 | 6.26 | 7.26 | N77.0°E | |
3 | 302.71 | 11.78 | 8.42 | 8.00 | 2.38 | 3.36 | 13.21 | 8.00 | 8.00 | / | |
BH-3 | 1 | 119.17 | 9.16 | 5.36 | 3.96 | 0.46 | 3.80 | 6.07 | 3.96 | 3.15 | N77.0°E |
2 | 186.20 | 13.02 | 5.62 | 5.42 | 1.12 | 7.40 | 9.53 | 5.42 | 4.92 | / | |
