From: Strata behavior at fully-mechanized coal mining and solid backfilling face
Rock | Elasticity modulus/GPa | Tensile strength/MPa | Cohesion/MPa | Poisson’s ratio | Density/kN/m3 |
---|---|---|---|---|---|
Sandstone | 28 | 6.0 | 13 | 0.26 | 23.8 |
Shale | 25 | 3.5 | 7 | 0.23 | 24.2 |
Ji15 Coal | 9 | 1.5 | 4 | 0.33 | 14.3 |
Mudstone | 23 | 7.0 | 12 | 0.27 | 25.5 |