Research Article
Seismic Response Analysis of Deep Underground Roadways and Coal Pillars under the Influence of the Adjacent Goaf
Table 1
Reference table of FDM and DEM physical mechanical parameters.
| | Name of coal and rock mass | Bulk modulus (GPa) | Shear modulus (GPa) | Density (kg/m3) | Cohesion (MPa) | Internal friction angle (°) |
| | Model floor, 5 m | 5.9 | 2.5 | 2620 | 1.3 | 29 | | Left and right pillars | 3.1 | 1.5 | 1420 | 0.5 | 22 |
| | Mechanical parameters in the DEM model | | Contact modulus Ec (GPa) | Stiffness ratio kn/ks | Frictional coefficient μ | Normal strength/σc (MPa) | Tangential strength/τc (MPa) | | 10 | 1.0 | 0.5 | 10 | 10 |
|
|
