Research Article
Influence of Mechanical Properties of Filling Paste on Overlying Strata Movement and Surface Settlement
Table 4
Mechanical parameters of coal and rock joints.
| | Rock stratum | Normal stiffness (Gpa) | Shear stiffness (Gpa) | Cohesion (Mpa) | Internal friction angle (°) | Tensile strength (Mpa) |
| | Quaternary topsoil | 1.04 | 0.94 | 0.00 | 18.19 | 0.00 | | Medium grained sandstone | 3.13 | 2.06 | 0.51 | 26.57 | 2.72 | | Siltstone | 4.03 | 4.20 | 0.57 | 6.20 | 3.93 | | Fine grained sandstone | 4.69 | 3.25 | 0.38 | 7.78 | 3.47 | | Coal seam | 3.26 | 1.03 | 0.16 | 20.88 | 1.08 |
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