Research Article
Study on the Safety Thickness of Rock Strata for Outburst Prevention in Deep Tunnel Based on Numerical Modeling and Backpropagation Neural Network
Table 1
Geotechnical parameters of the numerical model.
| | Geotechnical type | Volume weight (kN/m3) | Cohesion (kPa) | Internal friction angle (°) | Bulk modulus (GPa) | Shear modulus (GPa) |
| | Granite (Grade IV) | 24.5 | 550 | 32 | 15.73 | 25 | | Fault | 20 | 65 | 30 | 1.26 | 4.08 | | Initial lining | 23 | 3600 | 49 | 17.1 | 11.8 |
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