Research Article
Effect of Coalbed Methane Well Fracturing on Slope Stability of Open-Pit Coal Mine: A Case Study of Shengli East No. 2 Open-Pit Coal Mine
Table 5
Material parameters of the geological model.
| | Type of layer | Bulk density (kg/m3) | Bulk modulus (MPa) | Shear modulus (MPa) | Tensile strength (MPa) | Cohesion (MPa) | Friction angle (°) |
| | Topsoil layer | 1,800 | 12.5 | 5.8 | 1 | 0.13 | 18 | | Coalbed no. 4 | 1,500 | 4,780 | 3,740 | 8.7 | 1.32 | 27 | | Middle rock layer | 2,300 | 1,390 | 1,040 | 1.8 | 2.3 | 24 | | Coalbed no. 6 | 1,500 | 4,780 | 3,740 | 8.7 | 1.32 | 27 | | Conglomerate layer | 2,600 | 7,550 | 6,140 | 1.87 | 8.56 | 37 | | Coal mass fracture | 0 | 0 | 0 | 0 | 0 | 0 |
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