Research Article
Self-Designed Hydrophilicity-Related Geomaterials and Their Testing Utility in Simulation of Overlying Strata Instability
Table 4
Overlying strata structure of working face.
| Number | Rock stratum | Thickness (m) | Volume Weight (g/cm3) | Compressive strength (MPa) | Tensile strength (MPa) | Elastic modulus (GPa) | Poisson’s ratio | Water absorption rate |
| 11 | Coarse sandstone | 73.7 | 2.3–2.52 | 117.5 | 14.90 | 21.30 | 0.27 | 2 | 10 | Coarse sandstone | 48 | 2.3–2.52 | 146.2 | 7.70 | 15.50 | 0.23 | 2 | 9 | Medium-grained sandstone | 6 | 2.4–2.48 | 53.7 | 1.70 | 7.94 | 0.22 | 12 | 8 | Sandy mudstone | 7.4 | 2.27–2.44 | 30.3 | 1.25 | 3.34 | 0.21 | 6 | 7 | Sandy mudstone | 38.9 | 2.27–2.44 | 121.3 | 5 | 5.4 | 0.25 | 6 | 6 | Mudstone | 8.7 | 2.18–2.34 | 38.8 | 1.2 | 1.2 | 0.15 | 0.7 | 5 | Coarse sandstone | 7.3 | 2.3–2.52 | 24.3 | 1 | 5.5 | 0.22 | 2 | 4 | Mudstone | 6.9 | 2.18–2.34 | 21.5 | 0.9 | 3.34 | 0.2 | 0.7 | 3 | Sandy mudstone | 9.6 | 2.27–2.44 | 49 | 3.6 | 9.5 | 0.19 | 6 | 2 | Coarse sandstone | 4 | 2.3–2.52 | 25.6 | 1 | 3.94 | 0.23 | 2 | 1 | Coal | 16 | 1.4–1.66 | 10.2 | 0.64 | 1.49 | 0.31 | 10 |
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