Research Article
Constant Resistance and Yielding Support Technology for Large Deformations of Surrounding Rocks in the Minxian Tunnel
Figure 6
Failure process of the tunnel support system. (a) Tunneling face collapse. (b) Local deformation. (c) Cracking and falling off of sprayed concrete. (d) Distortion of steel frame. (e) Large-area failure of sprayed concrete. (f) Secondary lining cracking.
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