Research Article
A New Closed-Form Solution of the Side Abutment Pressure Distribution of Roadway
Table 2
Properties of the surrounding rock and the interface.
| | Properties of the surrounding rock | Unit | Value |
| | Roof/floor density | kg/m3 | 2500 | | Coal density | kg/m3 | 1300 | | Roof/floor modulus | GPa | 10 | | Coal modulus | GPa | 4 | | Roof/floor Poisson ratio | | 0.2 | | Coal Poisson ratio | | 0.3 | | Coal cohesion | MPa | 1 | | Coal friction angle | ° | 25 | | Coal tension | MPa | 0.5 | | Properties of the interface | unit | Value | | Normal stiffness | GPa | 673 | | Shear stiffness | GPa | 673 | | Cohesion | MPa | 0.1 | | Friction angle | ° | 10 | | Tension | MPa | 0 |
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