Table 2 The adopted physical–mechanical parameters
Strata | Rock formation | Elastic modulus (GPa) | Poisson’s ratio | Density (kN/\(\hbox {m}^{3}\)) | Friction angle (\(^{\circ }\)) | Cohesion (kPa) |
|---|---|---|---|---|---|---|
O | – | 17.80 | 0.12 | 2250 | 33 | 296.07 |
C | C\(_{2}\)b | 14.84 | 0.13 | 2350 | 28 | 262.23 |
C | C\(_{3}\)t | 14.10 | 0.14 | 2700 | 27 | 253.78 |
C | Coal | 0.35 | 0.24 | 2350 | 22 | 70.00 |
P | P\(_{1}\)s | 10.39 | 0.15 | 2650 | 26 | 203.02 |
P | P\(_{1}\)x | 9.71 | 0.15 | 2517 | 27 | 194.57 |
P | P\(_{2}\)s | 9.71 | 0.15 | 2517 | 27 | 194.57 |
N | – | 3.11 | 0.17 | 2340 | 23 | 160.72 |
Q | – | 0.05 | 0.26 | 1980 | 18 | 29.61 |