Table 1 In-situ stress conditions in this study.
From: Evolution law of surrounding rock stress field for ultra-deep shaft development blasting
Buried depth H/m | \(\sigma_{h}\)/MPa | \(\sigma_{H}\)/MPa | \(\tfrac{{\sigma_{h} + \sigma_{H} }}{2}\)/MPa | Buried depth H/m | Non-uniform coefficient \(k\) | \(\sigma_{h}\)/MPa | \(\sigma_{H}\)/MPa |
|---|---|---|---|---|---|---|---|
500 | 17.5 | 25.1 | 21.3 | 1000 | 0 | 0 | 40 |
1000 | 27 | 40.1 | 33.6 | 1000 | 0.25 | 10 | 40 |
1500 | 36.5 | 55.1 | 45.8 | 1000 | 0.5 | 20 | 40 |
2000 | 46 | 70.1 | 58.1 | 1000 | 0.75 | 30 | 40 |
