Research Article
Comprehensive Measurement of the Deformation and Failure of Floor Rocks: A Case Study of the Xinglongzhuang Coal Mine
Table 2
The geomechanical parameters of each stratum.
| | Rock | Density (g·cm-3) | Bulk modulus (GPa) | Shear modulus (GPa) | Cohesion (MPa) | Friction angle (°) | Tensile strength (MPa) |
| | Medium sandstone | 2750 | 3.1 | 2.7 | 6.2 | 32 | 3.6 | | Siltstone | 2600 | 2.6 | 1.6 | 4.7 | 30 | 2.5 | | 3#coal | 1400 | 1.1 | 0.3 | 1.2 | 22 | 0.6 | | Mudstone | 2500 | 1.8 | 0.5 | 2.2 | 26 | 1.6 | | Limestone | 2800 | 8.4 | 5 | 13.2 | 36 | 5.5 |
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