Table 2 Relationship between the measured maximum horizontal principal stress and vertical stress components in some Chinese coal mines.
From: Insights into fundamental problems of rockburst under the modern structure stress field
Coal mine | Depth (m) | Maximum principal horizontal stress | Vertical stress/horizontal component | Principal horizontal stress/Vertical stress | Stress field type | Poisson’s ratio/lateral pressure coefficient |
|---|---|---|---|---|---|---|
Wudong coal mine | 275 | 7.0 | 7.4/2.1 | 0.95 | Tectonic stress field | 0.22/0.28 |
Jixian coal mine | 668 | 36.61 | 18.0/7.8 | 2.03 | Tectonic stress field | 0.30/0.43 |
Laohutai coal mine | 758 | 31.94 | 20.5/8.4 | 1.56 | Tectonic stress field | 0.29/0.41 |
Yuejin coal mine | 996 | 22.87 | 26.9/11.0 | 0.85 | Tectonic stress field | 0.29/0.41 |
Linxi coal mine | 980 | 46.27 | 26.46/7.4 | 1.75 | Tectonic stress field | 0.22/0.28 |
