Due to the weak surrounding rock, high ground stress. easy collapse and big deformation, the construction of tunnels with mudstone were very difficult.
泥岩隧道围岩软弱，地应力强烈，易坍塌大变形，修建困难。
So steel fiber reinforced shotcrete should be the first choice for tunnel support on the condition of tunnel crossing high ground stress and having rock-burst tendency.
因而认为钢纤维混凝土应成为高地应力条件下的有岩爆倾向的隧道支护首选。
The paper describes the design method and results of this tunnel, and presents several problems in high ground stress region to which the attention must be paid specially in big tunnel design.
本文介绍该隧洞的设计方法和设计成果，并提出了位于高地应力区的大型隧洞设计中应特别重视的几个问题。
As the diversion tunnel of Ertan Hydroelectric plant has big dimensions and high initial ground stress, the new conception and method are used in design.
二滩水电站导流隧洞规模大、初始地应力高，设计中采用了现代地下结构设计理论和方法。
In controlling factors of high permeability, the deformation of coal, coal fracture direction, ground stress and drainage rate were discussed.
在渗透率控制因素方面，从煤体变形、煤层裂隙方向、地应力和排采方面对其进行探讨。
In controlling factors of high permeability, the deformation of coal, coal fracture direction, ground stress and drainage rate were discussed.
在渗透率控制因素方面，从煤体变形、煤层裂隙方向、地应力和排采方面对其进行探讨。
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