Research Article
In Situ Stress Inversion and Distribution Characteristics of Tunnel Based on Numerical Simulation and Neural Network Technology
Table 2
Rock mass strength parameters based on GSI classification index.
| | Lithology | Cohesion (MPa) | Friction angle | Tensile strength (MPa) | Uniaxial compressive strength | Modulus of deformation (GPa) |
| | Thick carbonaceous slate | 1.5 | 36.1 | 0.18 | 3.62 | 6.81 | | Thin layer carbonaceous slate | 0.84 | 27.5 | 0.04 | 0.92 | 2.42 | | Porphyry | 7.81 | 35.2 | 1.31 | 21.09 | 18.11 | | Basalt limestone interbedding | 4.79 | 24.2 | 0.13 | 3.36 | 4.29 |
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