Research Article
Overburden Damage Degree-Based Optimization of High-Intensity Mining Parameters and Engineering Practices in China’s Western Mining Area
Table 2
Physical and mechanical parameters of coal and rock mass.
| | Lithology | Bulk modulus (GPa) | Shear modulus (GPa) | Internal fraction angle (Deg.) | Tensile strength (MPa) | Cohesion (MPa) | Density (kg/m3) |
| | Aeolian sand | 3.3 | 1.53 | 36.5 | 0 | 3.65-3 | 1580 | | Gritstone | 6.3 | 5.5 | 30 | 1.78 | 12.4 | 2372 | | Medium sandstone | 8.1 | 6.37 | 28.1 | 1.73 | 18 | 2484 | | Fine sandstone | 8.4 | 6.7 | 22.4 | 3.57 | 20.6 | 2615 | | Sandy mudstone | 3.18 | 2.40 | 18 | 3.77 | 17.7 | 2330 | | Siltstone | 3.0 | 2.47 | 24.7 | 2.56 | 23.1 | 2295 | | Mudstone | 2.13 | 0.93 | 36.6 | 4.18 | 11.7 | 2311 | | Coal 1-2 | 1.51 | 5.7 | 23.6 | 1.69 | 17.9 | 1280 |
|
|
