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；
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.
它的最主要的理论内涵是保护围岩，最大限度的调动和发挥围岩的自承能力。
Its most important theoretical content is protection adjacent rock, a maximum mobility and capacity for self surrounding rock.
提高了围岩的自承能力。
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