Table 5 Mechanical parameters of model contact surface.
Strata | Normal stiffness (GPa) BG/AG | Shear stiffness (GPa) BG/AG | c (MPa) BG/AG | φ (°) BG/AG | Rt (MPa) BG/AG |
|---|---|---|---|---|---|
Limestone 8 | 3.93/4.1 | 3.93/4.1 | 0/0.05 | 30/30 | 0/0.01 |
Limestone 9 | 3.93/4.1 | 3.93/4.1 | 0/0.05 | 30/30 | 0/0.01 |
Sandy mudstone | 1.83/1.9 | 1.23/1.9 | 0/0.05 | 31/31 | 0/0.01 |
Mudstone | 1.68/1.9 | 1.18/1.9 | 0/0.05 | 28/29 | 0/0.01 |
Coal seam 2–1 | 2.1/2.1 | 1.2/1.2 | 0/0 | 18/18 | 0/0 |
Immediate roof | 0.9/0.9 | 0.9/0.9 | 0/0 | 26/26 | 0/0 |
Fault | 0.5/0.5 | 0.5/0.5 | 0/0 | 10/10 | 0/0 |
