Table 1 Rock mechanics parameters of rock stratum
Number | Lithology | Density (kg/m3) | Bulk modulus (Pa) | Shear modulus (Pa) | Cohesion (MPa) | Internal friction angle (°) | Tensile strength (MPa) |
|---|---|---|---|---|---|---|---|
1 | Mudstone | 2652 | 2.54E+09 | 1.38E+09 | 1.30 | 30 | 0.43 |
2 | Carbonaceous shale | 2572 | 4.10E+09 | 2.58E+09 | 1.87 | 32 | 1.1 |
3 | Siltstone | 2596 | 1.09E+10 | 8.58E+09 | 17.24 | 43 | 2.29 |
4 | Sandy mudstone | 2686 | 4.11E+09 | 3.08E+09 | 7.06 | 35 | 1.00 |
5 | 13 Coal seam | 1400 | 1.90E+09 | 9.30E+08 | 0.84 | 27 | 0.28 |
6 | Fine sandstone | 2730 | 8.18E+09 | 7.28E+09 | 18.13 | 45 | 2.29 |
7 | Medium sandstone | 2607 | 7.34E+09 | 6.62E+09 | 13.02 | 42 | 3.68 |