Research Article
A Discussion of Stability and Engineering Verification of Thin Immediate Roof under Uniform Load of the Rectangular Coal Roadway
Table 1
Properties of coal and immediate roof of 1905S entry.
| | Stratum | Thickness (m) | Tensile strength (MPa) | Compressive strength (MPa) | Elastic modulus (GPa) | Poisson’s ratio | Cohesion (MPa) | Internal friction angle (°) |
| | Immediate roof | 1.8 | 5.09 | 98.75 | 46.3 | 0.22 | 8.47 | 33.9 | | Coal seam | 4.0 | — | 4.39 | 7.86 | 0.31 | 1.51 | 25.3 |
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