Parameter Lithologic characters | Bulk modulus/GPa | Shear moduus/GPa | Tensile strength/MPa | Cohesion/MPa | Angle of internal friction/ | Density/ kg/m3 |
Fine grain quartz sandstone | 6.1 | 4 | 1.49 | 1.5 | 13 | 25.7 |
Sandy mudstone | 3.44 | 2.4 | 1.1 | 1.8 | 17 | 26 |
Mudstone | 2.5 | 1.4 | 0.6 | 1.67 | 19 | 25 |
Carbon mudstone | 2.5 | 1.4 | 1.42 | 2.6 | 23 | 26 |
3# coal seam | 2.31 | 1.6 | 0.2 | 1.06 | 9 | 14 |
The fine feldspathic sandstone | 10.9 | 4.9 | 1.8 | 1.93 | 22 | 27 |