Research Article
Failure Mechanism and Control Technology for a Large-Section Roadway under Weakly Cemented Formation Condition
Table 1
Properties assumed in 3DEC model for immediate roadway roof.
| | Contact properties | Values |
| | Young’s modulus of blocks, (GPa) | 5.0 | | Poisson’s ratio of blocks, | 0.23 | | Normal stiffness of contacts, (GPa/m) | 12 | | Shear stiffness of contacts, (GPa/m) | 4.5 | | Contact cohesion, (MPa) | 4.2 | | Contact friction angle, (o) | 20 | | Contact tensile strength, (MPa) | 3 |
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