The plastic zones and displacements around underground openings in rock masses containing a fault
The plastic zones and displacements around underground openings in rock masses containing a fault
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DOI：
10.1016/j.tust.2004.05.003
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发表时间：
2005-01-01
影响因子：
6.9
通讯作者：
Azzam, R
中科院分区：
文献类型：
--
作者：
Hao, YH;Azzam, R
断层是坚硬岩体中常见的大型地质不连续面，大多数严重的地下结构失稳都与断层附近的存在密切相关。本文采用数值方法（UDEC）进行了参数研究，确定了一些故障参数是真正关键的地下结构的稳定性。这些断层参数是断层倾角、断层剪切强度和断层相对于地下结构的位置。数值模拟结果表明，断层对地下结构稳定性的影响主要表现在：断层增大了围岩的塑性区和位移，使围岩的塑性区和位移不对称分布。建立了诱导塑性区、最大位移随这些断层参数变化的关系。给出了塑性区和位移的分布情况，并讨论了其影响机理。这些结果为支架设计提供了指导。(C)2004爱思唯尔有限公司保留所有权利。
Faults are the commonly encountered large geological discontinuities in hard rock masses, most severe underground structure instability is found to be closely associated with the faults presence nearby. The parametric study carried out in this paper using numerical method (UDEC) has identified some fault parameters to be really critical for the underground structure stability. These fault parameters are fault dips, fault shear strength and fault locations relative to the underground structure. This numerical investigation revealed that faults affect the stability of underground structure by the tendency of increasing the plastic zones, displacements and causing both asymmetrically distributed in the rock masses adjacent to the excavation. The relationship of the induced plastic zones, maximum displacements varying with these fault parameters was established. The distribution of plastic zone and displacement was graphically presented and the mechanisms such effects were discussed. These results offer a guideline in support design. (C) 2004 Elsevier Ltd. All rights reserved.