Stability analysis of vertical excavations in hard rock by integrating a fracture system into a PFC model
Stability analysis of vertical excavations in hard rock by integrating a fracture system into a PFC model
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DOI：
10.1016/j.tust.2008.10.002
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发表时间：
2009-05-01
影响因子：
6.9
通讯作者：
Grenon, Martin
中科院分区：
文献类型：
--
作者：
Hadjigeorgiou, John;Esmaieli, Kamran;Grenon, Martin
本文提出了一个全面的工程方法来分析岩石中的垂直开挖的稳定性。这种方法依赖于离散断裂系统的生成，以更好地捕捉岩体的结构复杂性。由此产生的断裂系统因此被链接到一个独特的元素应力分析。选择颗粒流代码，因为它可能允许更大的灵活性，在代表裂缝系统。在第一个示例中，将3D裂缝系统链接到2D PFC模型中。虽然这使得一个更好的量化的应力结构相互作用，它需要重要的简化，这可能不一定是适当的。通过将3D裂缝系统完全集成到3D PFC模型中，这些问题已经得到解决。这将潜在地导致一种设计工具，该工具充分考虑了硬岩中垂直或近垂直开挖稳定性的应力结构相互作用。(C)2008爱思唯尔有限公司保留所有权利。
This paper presents an implementation of a comprehensive engineering approach to the analysis of the stability of vertical excavations in rock. This approach relies in the generation of discrete fracture systems to better capture the structural complexity of the rock mass. The resulting fracture system is consequently linked into a distinct element stress analysis. The particle flow code was selected as it potentially allows greater flexibility in representing a fracture system. In the first example a 3D fracture system was linked into a 2D PFC model. Although this has allowed for an improved quantification of stress structure interaction it necessitated important simplifications which may not be necessarily appropriate. These have been overcome by providing a complete integration of a 3D fracture system to a 3D PFC model. This will potentially lead into a design tool that adequately account for the stress structure interaction on the stability of vertical or near vertical excavations in hard rock. (C) 2008 Elsevier Ltd. All rights reserved.