Research Article
Characteristics of Stress Transfer and Progressive Fracture in Overlying Strata due to Mining-Induced Disturbances
Table 1
Material parameters of the numerical model.
| Group | Density, (kg/m3) | Elastic modulus, (109 Pa) | Poisson's ratio, | Unconfined compressive strength (MPa) | Cohesion, (MPa) | Internal friction angle, (°) |
| Group 1 | 2300 | 80 | 0.25 | 135 | 5.56 | 35.1 | Group 2 | 2700 | 70 | 0.20 | 121 | 3.65 | 31.7 | Group 3 | 1700 | 9 | 0.28 | 30 | 4.75 | 32.4 | Group 4 | 2500 | 40 | 0.22 | 125 | 2.58 | 29.6 | Group 5 | 1650 | 8 | 0.26 | 25 | 4.25 | 32.0 | Group 6 | 1655 | 7 | 0.27 | 36 | 4.35 | 33.0 | Group 7 | 1690 | 9 | 0.26 | 38 | 4.40 | 32.1 | Group 8 | 1585 | 8 | 0.25 | 25 | 4.40 | 33.0 | Group 9 | 1620 | 7 | 0.28 | 37 | 4.25 | 32.5 | Group 10 | 1685 | 9 | 0.27 | 29 | 4.35 | 32.6 | Group 11 | 1625 | 8 | 0.28 | 28 | 4.30 | 32.8 | Group 12 | 1610 | 7 | 0.26 | 32 | 4.55 | 32.5 | Group 13 | 1685 | 9 | 0.25 | 30 | 4.65 | 32.6 | Group 14 | 1600 | 9 | 0.26 | 31 | 4.50 | 32.8 | Group 15 | 1610 | 8 | 0.27 | 28 | 4.60 | 32.4 | Group 16 | 1615 | 8 | 0.27 | 27 | 4.50 | 32.5 | Group 17 | 1620 | 7 | 0.26 | 30 | 4.60 | 32.7 |
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