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。
The interaction between soft-weak Surrounding Rock and initial support of deep buried tunnels has become one of the most important subjects in underground engineering research.
深埋隧道软弱围岩与初期支护的相互作用是地下工程研究的重要课题之一。
The time factor problems of tunnel surrounding rock vs. supporting system in weak formation are analysed and the reasonable supporting time is broadly explored with rheological theory.
本文以流变学理论为基础，对软弱地层内隧道围岩—支护系统的时间因素问题进行了分析，对合理的支护时间作了较为全面的探讨。
The time to produce damage deformation in surrounding rock and possible loosening area are obtained by analyzing in situ measurement of displacement in soft weak coal layer.
本文通过对软弱煤层巷道进行位移实测及数据分析，得到了西部某矿软弱煤层巷道围岩变形达破坏所需的时间和可能的变形松动区域。
The paper introduces a new style of loader which universally used for heading faces with heavy saddle back in roadway and weak stability of face surrounding rock.
介绍一种新型的装载机，该机能适用于巷道底板起伏变化大，工作面围岩稳定性较差的掘进工作面中使用。
The surrounding rock of roadway is a compound structure consisted of roof, floor and sides. The sides of extraction opening are the weak coal mass, which affect the stability of floor directly.
巷道围岩是由顶板、底板、两帮组成的复合结构体，回采巷道两帮为软弱煤体，直接影响到底板的稳定性。
The geological engineering geological characteristics of the surrounding rock are the main factors affected the stability of weak tunnel, and are the basis for tunnel support.
围岩的地质、工程地质特性是影响软岩巷道稳定性的主要因素，也是巷道支护设计的依据。
Can be seen surrounding rock structure of the typical pattern of damage to the roof and floor of bending damage and a broken pillar along the main damage to the weak side slip.
可见采场围岩结构的典型破坏模式以顶底板的弯曲折断破坏和矿柱沿弱面滑移破坏为主。
Can be seen surrounding rock structure of the typical pattern of damage to the roof and floor of bending damage and a broken pillar along the main damage to the weak side slip.
可见采场围岩结构的典型破坏模式以顶底板的弯曲折断破坏和矿柱沿弱面滑移破坏为主。
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