A softening block approach to simulate excavation in jointed rocks
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- 作者：Qinghui Jiang (1)
Chuangbing Zhou (1)
Dianqing Li (1)
Man-chu Ronald Yeung (2) - 关键词：Jointed rock masses ; Discontinuous deformation analysis ; Softening block ; Excavation ; Masses rocheuses fissurées ; Analyse de déformation en milieu discontinu ; Bloc affaibli ; Excavation
- 刊名：Bulletin of Engineering Geology and the Environment
- 出版年：2012
- 出版时间：November 2012
- 年：2012
- 卷：71
- 期：4
- 页码：747-759
- 全文大小：1179KB
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Chuangbing Zhou (1)
Dianqing Li (1)
Man-chu Ronald Yeung (2)
1. School of Civil Engineering, Wuhan University, Wuhan, 430072, People’s Republic of China
2. Civil Engineering Department, California State Polytechnic University, Pomona, USA - ISSN：1435-9537
文摘
The instability of rock masses as a result of excavation is one of the most important rock mechanics problems. This paper proposes a new “softening block-approach for the simulation of stage-wise sequential excavations in jointed rock masses. The concept of a softening block is presented and the corresponding algorithm developed and implemented into the original Discontinuous Deformation Analysis program proposed by Shi. The proposed softening block approach obviates the need to remove the excavated blocks from the calculation model, which further simplifies the work of pre-processing for sequential excavation simulations. Finally, two numerical examples are presented to demonstrate the validity and capability of the proposed approach. The results indicate that it can be used to simulate the excavation in jointed rock mass efficiently and accurately.