An improved numerical manifold method for simulation of sequential excavation in fractured rocks
文献类型：期刊论文
| 作者 | Hatzor, Yossef H.1,2; Tal, Yuval2; Feng, Xia-Ting1
|
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2014 |
| 卷号 | 65页码:116-128 |
| 关键词 | Discrete element modeling Numerical manifold method In situ stresses Excavation sequence Jinping hydroelectric project |
| ISSN号 | 1365-1609 |
| DOI | 10.1016/j.ijrmms.2013.10.005 |
| 英文摘要 | We improve the original numerical manifold method (NMM) capability to correctly model the stability of underground openings embedded in discontinuous rock masses under high in situ stress conditions by implementing an algorithm which models the excavation sequence during NMM simulations, starting with a domain with no opening at all and progressively adding openings according to the planned construction phases. The significance of this improvement is demonstrated using the case of Zedekiah cave underneath the old city of Jerusalem, excavated 2000 years ago at a shallow depth in a highly discontinuous rock mass and still stands unsupported. The results clearly show that modeling underground openings in discontinuous rocks without consideration of the excavation sequence is overly conservative. We proceed with developing a new procedure to impose high initial stresses in NMM for accurate deformation modeling of deep underground excavations, and verify our suggested approach using the analytical Kirsch solution. Finally, we apply our enhanced NMM code to the Jinping hydroelectric project tunnels in Sichuan Province, China. Using very accurate sliding micrometer data obtained during the excavation of a research tunnel within the Jinping tunnel complex we constrain the in situ stress field at depth by inversion of the measured displacement data using the modified NMM code. The results provide a quantitative assessment of the in situ stress held Jinping tunnels at a depth of 2525 in below ground surface, where the execution of hi situ stress measurements by conventional procedures proves an extremely challenging task. (C) 2013 Elsevier Ltd. All rights reserved |
| WOS研究方向 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000331715500011 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3547]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech 2.Ben Gurion Univ Negev, Dept Geol & Environm Sci; |
| 推荐引用方式 GB/T 7714 | Hatzor, Yossef H.,Tal, Yuval,Feng, Xia-Ting. An improved numerical manifold method for simulation of sequential excavation in fractured rocks[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2014,65:116-128. |
| APA | Hatzor, Yossef H.,Tal, Yuval,&Feng, Xia-Ting.(2014).An improved numerical manifold method for simulation of sequential excavation in fractured rocks.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,65,116-128. |
| MLA | Hatzor, Yossef H.,et al."An improved numerical manifold method for simulation of sequential excavation in fractured rocks".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 65(2014):116-128. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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