Research Article
Analysis on Treatment Effect of Mine Tunnel Construction Spring in Karst Area
Table 2
Physical parameters of soil layer and lining.
| Soil layer and support | Bulk density () | Poisson’s ratio | Elastic modulus (MPa) | Cohesive force (kPa) | Friction angle (°) | Thickness (m) |
| Silty clay | 19.3 | 0.35 | 22.59 | 46 | 24.4 | 15.6 | Weathered limestone | 25.5 | 0.26 | 40200 | 670 | 40 | 16.7 | Shallow strong water area | 21.3 | 0.31 | 200.3 | 130 | 28.9 | 1.0 | General area | 20.9 | 0.31 | 182.8 | 125 | 28.1 | 1.0 | Deep weak water area | 20.5 | 0.33 | 170.2 | 118 | 26.7 | 1.0 | Initial support | 25 | 0.2 | 25000 | — | — | 0.3 |
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