Research Article
Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic Stress
Table 1
Parameters of model material.
| | Lithology | Density (kg/m3) | Bulk modulus (GPa) | Shear modulus (GPa) | Internal friction angle (°) | Cohesion (MPa) | Tensile strength (MPa) |
| | Mudstone | 2400 | 2.05 | 1.86 | 52 | 5.80 | 1.60 | | Sandy mudstone | 2580 | 2.85 | 2.28 | 57 | 6.40 | 1.90 | | Mudstone | 2400 | 2.05 | 1.86 | 52 | 5.80 | 1.60 | | Limestone | 2640 | 4.62 | 3.83 | 65 | 7.20 | 2.20 | | Coal | 1400 | 1.00 | 0.80 | 38 | 3.60 | 1.20 | | Sandy mudstone | 2580 | 2.85 | 2.28 | 57 | 6.40 | 1.90 | | Fine sandstone | 2600 | 5.85 | 4.76 | 67 | 7.40 | 2.40 | | Sandstone | 2620 | 4.96 | 4.27 | 65 | 7.20 | 2.30 |
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