Research Article
Mechanical Analysis of the Failure Characteristics of Stope Floor Induced by Mining and Confined Aquifer
Table 1
Analysis of measured values and theoretical values of floor failure depth in five coal mines.
| Coal mines | H (m) | M (m) | P (MPa) | Φ (°) | C (MPa) | Theoretical value (m) | Measured value (m) | Absolute error (%) | Relative error (%) |
| Xinzhi [41] | 300 | 2.63 | 2.30 | 45 | 3.5 | 8.5 | 9.0 | 0.5 | 5.6 | Yangcun [42] | 273 | 1.20 | 3.47 | 50 | 2.5 | 9.4 | 10.1 | 0.7 | 7.0 | Liujiazhuang [43] | 300 | 3.08 | 1.78 | 42 | 4.5 | 15.8 | 16.9 | 1.1 | 6.5 | Suntuan [44] | 466 | 3.40 | 4.00 | 36 | 5.3 | 15.6 | 17.0 | 1.4 | 8.2 | Chenghe [45] | 300 | 1.80 | 2.20 | 45 | 3.8 | 9.5 | 10.0 | 0.5 | 5.0 |
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Note. M represents the mining height.
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