Research Article
Research on Mechanisms and Control Measures of Surrounding Rock Disaster in Large Section Roadway with Top Coal under the Influence of Tectonic Stress
Table 1
Mechanical parameters of rock mass.
| | Lithology | Elastic modulus (GPa) | Poisson’s ratio | Friction angle (°) | Cohesive force (MPa) | Tensile strength (MPa) | Thickness (m) |
| | Overlying strata | 3.1 | 0.32 | 25.0 | 22.0 | 2.8 | 10.00 | | Fine sandstone | 3.2 | 0.24 | 26.7 | 20.0 | 4.8 | 4.50 | | Mudstone | 1.9 | 0.28 | 18.0 | 3.2 | 2.0 | 10.75 | | Mudstone and sandy mudstone | 1.9 | 0.28 | 18.8 | 3.6 | 2.6 | 2.20 | | Coal | 1.0 | 0.30 | 17.0 | 2.0 | 1.2 | 6.30 | | Mudstone | 1.9 | 0.28 | 18.0 | 3.2 | 2.0 | 4.25 | | Fine sandstone | 3.2 | 0.24 | 26.7 | 20.0 | 4.8 | 2.00 | | Overburden strata | 3.5 | 0.22 | 24.5 | 18.5 | 3.6 | 10.00 |
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