A Top Pilot Tunnel Preconditioning Method for the Prevention of Extremely Intense Rockbursts in Deep Tunnels Excavated by TBMs
文献类型：期刊论文
| 作者 | Zhou, Hui; Zhang, Chuanqing; Feng, Xiating ; Qiu, Shili; Wu, Wenping
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| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2012 |
| 卷号 | 45期号:3页码:289-309 |
| 关键词 | TBM Rockburst Top pilot tunnel FAI ERR ESS |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-011-0199-5 |
| 英文摘要 | The headrace tunnels at the Jinping II Hydropower Station cross the Jinping Mountain with a maximum overburden depth of 2,525 m, where 80% of the strata along the tunnels consist of marble. A number of extremely intense rockbursts occurred during the excavation of the auxiliary tunnels and the drainage tunnel. In particular, a tunnel boring machine (TBM) was destroyed by an extremely intense rockburst in a 7.2-m-diameter drainage tunnel. Two of the four subsequent 12.4-m-diameter headrace tunnels will be excavated with larger size TBMs, where a high risk of extremely intense rockbursts exists. Herein, a top pilot tunnel preconditioning method is proposed to minimize this risk, in which a drilling and blasting method is first recommended for the top pilot tunnel excavation and support, and then the TBM excavation of the main tunnel is conducted. In order to evaluate the mechanical effectiveness of this method, numerical simulation analyses using the failure approaching index, energy release rate, and excess shear stress indices are carried out. Its construction feasibility is discussed as well. Moreover, a microseismic monitoring technique is used in the experimental tunnel section for the real-time monitoring of the microseismic activities of the rock mass in TBM excavation and for assessing the effect of the top pilot tunnel excavation in reducing the risk of rockbursts. This method is applied to two tunnel sections prone to extremely intense rockbursts and leads to a reduction in the risk of rockbursts in TBM excavation. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000302811700002 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3345]  |
| 专题 | 岩土力学所知识全产出_期刊论文 岩土力学所知识全产出 国家重点实验室知识产出_期刊论文 |
| 作者单位 | Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Zhou, Hui,Zhang, Chuanqing,Feng, Xiating,et al. A Top Pilot Tunnel Preconditioning Method for the Prevention of Extremely Intense Rockbursts in Deep Tunnels Excavated by TBMs[J]. ROCK MECHANICS AND ROCK ENGINEERING,2012,45(3):289-309. |
| APA | Zhou, Hui,Zhang, Chuanqing,Feng, Xiating,Qiu, Shili,&Wu, Wenping.(2012).A Top Pilot Tunnel Preconditioning Method for the Prevention of Extremely Intense Rockbursts in Deep Tunnels Excavated by TBMs.ROCK MECHANICS AND ROCK ENGINEERING,45(3),289-309. |
| MLA | Zhou, Hui,et al."A Top Pilot Tunnel Preconditioning Method for the Prevention of Extremely Intense Rockbursts in Deep Tunnels Excavated by TBMs".ROCK MECHANICS AND ROCK ENGINEERING 45.3(2012):289-309. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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