Research Article
Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine
Table 3
The basic values and units of parameters.
| Parameters | Value | Unit | Description |
| | 0.40 | / | Frictional coefficient | | 375 | MPa | Yield strength of the rockbolt | | 0.0025 | m | Original thickness of the rockbolt | R | 0.02 | m | Radius of the rockbolt after installation | K | 45 | MPa/m | Shear stiffness of rock | E | 210000 | MPa | Elastic modulus of the rockbolt | l | 1.80 | m | Length of the rockbolt | | 0.05~1 | mm/a | Corrosion rate in depth | t | / | year | Corrosion time | N | / | 1000 kN | Anchoring force |
|
|