Table 1 Measured in-situ stress values of the auxiliary transport channel in the 3205 working face.
Principal stress category | Principal stress value (MPa) | Azimuth angle (°) | Tilt angle (°) |
|---|---|---|---|
Maximum principal stress \(\sigma_{1}\) | 10.31 | 244.09 | − 5.79 |
Intermediate principal stress \(\sigma_{2}\) | 9.14 | 11.75 | − 68.16 |
Minimum principal stress \(\sigma_{3}\) | 6.09 | 174.85 | − 20.98 |
