Research Article
3D XCT Mesostructure Characterization and Image-Based Discrete Element (DE) Modelling of Failure Patterns in Coal Gangue Particles (CGPs)
Table 3
Mesoparameters of the PBM used in the DE model.
| | | Mesoparameters | Value | Mesoparameters | Value |
| | Coal | Ball density ρc (kg/m3) | 1540 | Ball stiffness ratio | 2.17 | | Effective modulus (Pa) | 2.3e9 | Tensile strength (Pa) | 7.90e6 | | Friction coefficient f | 0.3 | Cohesion (Pa) | 3.95e6 | | Installation gap (m) | 1e − 4 | Friction angle () | 28 | | Radius multiplier | 1 | Normal damping ratio | 0.75 |
| | Gangue | Ball density (kg/m3) | 2950 | Ball stiffness ratio | 2.582 | | Effective modulus (Pa) | 6.0e9 | Tensile strength (Pa) | 3.65e7 | | Friction coefficient f | 0.3 | Cohesion (Pa) | 3.04e7 | | Installation gap (m) | 1e − 4 | Friction angle () | 34 | | Radius multiplier | 1 | Normal damping ratio | 0.75 |
| | Interfaces | Effective modulus (Pa) | 4.15e9 | Tensile strength (Pa) | 3.42e7 | | Friction coefficient f | 0.3 | Cohesion (Pa) | 1.72e7 | | Installation gap (m) | 1e − 4 | Friction angle () | 31 | | Ball stiffness ratio | 2.38 | Normal damping ratio | 0.75 |
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