Table 1 Roof lithology characteristics of 120,907 face.
Rock layer number | Rock lithology | Lithologic thickness (m) | Volume force (kN/m3) | Elastic modulus (GPa) | Tensile strength (MPa) |
|---|---|---|---|---|---|
15 | Topsoil | 5.80 | 12.8 | 1.15 | 0.00 |
14 | Limestone | 98.07 | 26.2 | 34.10 | 3.50 |
13 | Muddy | 15.90 | 27.3 | 26.40 | 2.21 |
12 | Limestone | 38.53 | 26.2 | 34.10 | 3.50 |
11 | Mudstone | 1.36 | 25.5 | 17.70 | 1.50 |
10 | Limestone | 1.95 | 26.2 | 34.10 | 3.50 |
9 | Silty mudstone | 4.56 | 27.4 | 11.90 | 2.57 |
8 | Siltstone | 2.08 | 29.2 | 18.50 | 2.39 |
7 | Fine sandstone | 2.90 | 29.4 | 26.00 | 4.06 |
6 | Coal seam 4 | 0.78 | 17.1 | 10.00 | 1.00 |
5 | Fine sandstone | 4.48 | 29.4 | 26.00 | 4.06 |
4 | Coal seam 5 | 2.50 | 16.8 | 10.00 | 1.00 |
3 | Silty mudstone | 2.20 | 27.4 | 11.90 | 2.57 |
2 | Mudstone | 1.61 | 25.5 | 17.70 | 1.50 |
1 | Siltstone | 5.07 | 29.2 | 18.50 | 2.39 |
0 | Coal seam 9 | 3.00 | 16.6 | 10.00 | 1.00 |
