Numerical simulation of damage accumulation and seismic energy release during brittle rock failure - Part II: Rib pillar collapse
Numerical simulation of damage accumulation and seismic energy release during brittle rock failure - Part II: Rib pillar collapse
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DOI：
10.1016/s0148-9062(97)00010-7
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发表时间：
1998-02-01
影响因子：
7.2
通讯作者：
Tang, CA
中科院分区：
文献类型：
--
作者：
Kaiser, PK;Tang, CA
本文介绍了本文(第一部分)中提出的数值模型的应用，其中利用新开发的数值程序RFPA(2D)(岩石破裂过程分析)，给出了模拟脆性岩石失稳破坏过程中引起地震能量释放的损伤萌生和扩展的基本方法。研究了材料和加载系统特性(包括刚度和强度)对矿柱破坏及其相关地震模式的影响。结果证实，软加载系统促进了矿柱的失稳破坏或坍塌。软弱的柱基和柱上的剪应力大大降低了柱的承载能力，相关的地震活动和地震能量的释放也因这些因素而发生了显著的变化。正如预期的那样，对于高强度矿柱，剪切破坏发生在靠近矿柱边缘的底板和顶板，而对于低强度矿柱，则出现了矿柱内部的破坏区域。结果表明，该模型较好地模拟了矿柱的破坏过程。(C)1998年。爱思唯尔科学有限公司出版。
This paper presents an application of the numerical model presented in the companion paper (Part I) in which, by using a newly developed numerical code, RFPA(2D) (Rock Failure Process Analysis), a fundamental approach for the simulation of damage initiation and propagation causing seismic energy release during an unstable failure of brittle rock was presented. The influence of material and loading system properties including stiffness and strength on pillar failure and associated seismic patterns is studied. The results confirm that soft loading systems promote unstable failure or collapse of pillars. Weak pillar foundations and shear stresses on the pillar drastically reduce the pillar's load bearing capacity, and the related seismic activity and seismic energy release is significantly altered by these factors. As expected, for a high strength pillar, shear failure occurs in the floor and roof close to the edges of the pillar, whereas failure zones inside the pillar are found for low strength pillars. It is demonstrated that the proposed model properly simulates the pillar failure process. (C) 1998. Published by Elsevier Science Ltd.