Research Article
Influence of Different Excavation Sequence of Double-Side Heading Method on Supporting Structure
Table 1
Physicomechanical parameters of material.
| | Material name | Elastic modulus/(MPa) | Bulk density/(kN/m3) | Cohesion/(kN/m2) | Internal friction angle/(°) | Strata thickness/(m) |
| | Plain fill | 12.6 | 19.0 | 10.0 | 9.0 | 3.2 | | Medium-coarse sand | 16.0 | 20.0 | 0 | 30.0 | 2.0 | | Plastic residual soil | 22.0 | 22.0 | 18.6 | 18.0 | 14.6 | | Strongly weathered pelitic siltstone | 50.0 | 21.0 | 45.0 | 30.0 | 10.0 | | Moderately weathered pelitic siltstone | 200.0 | 25.6 | 180.0 | 32.0 | 2.2 | | Slightly weathered pelitic siltstone | 400.0 | 26.0 | 450.0 | 35.0 | 18.0 | | C25 shotcrete | 23000.0 | 25.0 | | | | | Initial support | 25383.0 | 25.0 | | | | | Temporary support | 29064.0 | 25.0 | | | | | Bolt | 206000.0 | 78.5 | | | |
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