Research Article
Dynamic Response and Time-Frequency Characteristic of Dangerous Rocks under the Combined Action of Rock Cavity Weathering and Earthquake
Table 2
PFC mesoscopic parameters of rocks.
| | Rock sample | Parameter | | Particle radius (m) | Particle density (kg·m−3) | Elastic modulus (GPa) | Tensile strength of parallel bond (MPa) | Bonding strength of parallel bond (MPa) | Local damping | Stiffness ratio | Coefficient of friction | Radius multiplier |
| | Sandstone | 0.4–0.45 | 2700 | 40 | 60.0 | 58 | 0.7 | 3.5 | 1.0 | 1.00 | | Mudstone | 0.5–0.6 | 2700 | 10 | 17.3 | 17 | 0.7 | 1.4 | 4.2 | 1.01 |
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