Research Article
A Numerical Study of Underground Cavern Stability by Geostress Characteristics
Table 7
The most favorable angle
for the underground cavern stability (degree: °).
| | | Burial depth (m) | Rock category | Geostress condition | | | , | , | , | , | , | , |
| | Key point displacement criteria | 400 | I | 0.0 | 0.0 | 0.0 | 17.3 | 7.9 | 19.9 | | 500 | I | 0.0 | 0.0 | 0.0 | 12.2 | 9.0 | 23.0 | | 600 | I | 0.0 | 0.0 | 0.0 | 12.4 | 7.7 | 21.5 | | 400 | II | 0.0 | 0.0 | 0.0 | 16.0 | 7.0 | 23.0 | | 600 | II | 0.0 | 0.0 | 0.0 | 3.0 | 8.0 | 22.0 |
| | Plastic zone criteria | 400 | I | 31.4 | 35.4 | 23.5 | 27.4 | 22.7 | 24.8 | | 500 | I | 30.9 | 27.9 | 28.1 | 23.2 | 20.7 | 24.3 | | 600 | I | 36.0 | 27.1 | 19.2 | 30.0 | 22.7 | 24.1 | | 400 | II | 28.8 | 27.2 | 24.8 | 25.0 | 21.8 | 25.4 | | 600 | II | 35.1 | 24.9 | 20.0 | 24.5 | 24.0 | 23.0 |
| | Splitting zone criteria | 400 | I | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 40.0 | | 500 | I | 40.0 | 40.0 | 40.0 | 0.0 | 0.0 | 40.0 | | 600 | I | 40.0 | 40.0 | 0.0 | 0.0 | 0.0 | 0.0 | | 400 | II | 40.0 | 40.0 | 40.0 | 0.0 | 0.0 | 0.0 | | 600 | II | 40.0 | 40.0 | 40.0 | 0.0 | 40.0 | 40.0 |
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