Research Article
Damage and Failure Evolution Mechanism for Coal Pillar Dams Affected by Water Immersion in Underground Reservoirs
Table 2
Physical and mechanical properties of coal after weakening.
| | Moisture content () (%) | Volumetric weight (kN·m−3) | Elastic modulus (GPa) | Shear modulus (MPa) | Tensile strength () (MPa) | Cohesion (MPa) | Internal friction angle (°) | Poisson ratio |
| | 0 | 15.00 | 14.00 | 3.00 | 0.30 | 1.80 | 25 | 0.22 | | 5 | 15.00 | 6.52 | 1.40 | 0.11 | 1.74 | 21.68 | 0.22 |
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