Stability Analysis of Surrounding Rock in Circular Tunnels Based on Critical Support Pressure

<div>Stresses distribution under different intermediate principal stress coefficients. (a) <i>σ</i><sub><i>r</i></sub> and (b) <i>σ</i><sub><i>θ</i></sub>.</div>

Advances in Civil Engineering

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Figure 4

Figure 4: Stability Analysis of Surrounding Rock in Circular Tunnels Based on Critical Support Pressure 