The tunnel section is advised to adopt curved shape and full-face excavation by controlled blasting to reduce disturbance on surrounding rock and maintain its self-supporting capability.
隧洞断面宜采用曲线形状； 宜采用控制爆破全断面开挖，减少对围岩的扰动以保持岩体自承能力；
2
Enhance the self-supporting capability of surrounding rock.
提高了围岩的自承能力。
3
The rock mass with the supporting structure works well with each other utilizing the utmost self-bearing capacity of the rock mass.