Modelling brittle failure of rock
Modelling brittle failure of rock
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DOI：
10.1016/s1365-1609(02)00051-5
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发表时间：
2002-09-01
影响因子：
7.2
通讯作者：
Martin, CD
中科院分区：
文献类型：
--
作者：
Hajiabdolmajid, V;Kaiser, PK;Martin, CD
实验室规模的脆性破坏观察表明，脆性破坏过程涉及微裂纹的萌生、生长和积累。在地下开口周围，观察表明，脆性破坏主要是一个渐进的板片形成过程，导致修改后的稳定几何形状，在许多情况下采用 V 形凹口的形式。基于同时动员内聚力和摩擦强度分量的传统失效准则（例如 Hoek-Brown 或 Mohr-Coulomb）的连续体模型未能成功预测脆性失效的程度和深度。本文提出了一种连续体建模方法，该方法捕获了脆性岩体破坏的一个重要组成部分，即作为岩石损伤或塑性应变函数的粘聚力减弱和摩擦强化（CWFS）。 (C) 2002 Elsevier Science Ltd. 保留所有权利。
Observations of brittle failure at the laboratory scale indicate that the brittle failure process involves the initiation, growth, and accumulation of micro-cracks. Around underground openings, observations have revealed that brittle failure is mainly a process of progressive slabbing resulting in a revised stable geometry that in many cases take the form of V-shaped notches. Continuum models with traditional failure criteria (e.g. Hoek-Brown or Mohr-Coulomb) based on the simultaneous mobilization of cohesive and frictional strength components have not been successful in predicting the extent and depth of brittle failure. This paper presents a continuum modelling approach that captures an essential component of brittle rock mass failure, that is, cohesion weakening and frictional strengthening (CWFS) as function of rock damage or plastic strain. (C) 2002 Elsevier Science Ltd. All rights reserved.