Rockburst and microseismic characteristics around lithological interfaces under different excavation directions in deep tunnels
文献类型：期刊论文
| 作者 | Li, Peng-Xiang; Feng, Xia-Ting ; Feng, Guang-Liang; Xiao, Ya-Xun; Chen, Bing-Rui
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| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2019 |
| 卷号 | 260页码:- |
| 关键词 | Neelum Jhelum hydropower station Tunnel Rockburst characteristics Lithological interface TBM Excavation direction |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2019.105209 |
| 英文摘要 | Sandstone (hard rock) and siltstone (relative soft rock) appeared alternately during tunnel boring machine (TBM) excavation of two headrace tunnels at the Neelum-Jhelum hydropower station in Pakistan. Rockbursts occurred frequently near these sandstone-siltstone interfaces, seriously threatening the safety of personnel and equipment. In situ rockburst investigations and microseismic monitoring were conducted to study the characteristics of these rockbursts and their associated microseismic activities around the lithological interfaces under different excavation directions (i.e., the TBM passing though sandstone and siltstone in different sequences). The results show that the rockburst frequency and intensity are greater during excavation from sandstone to siltstone than those during excavation from siltstone to sandstone within 15 m around the lithological interfaces. Moreover, the number of miroseismic events, the amount of microseismic radiated energy and the proportion of high-energy or large microseismic events are higher during excavation from sandstone to siltstone than those during excavation from siltstone to sandstone in the selected zone. In addition, the differences in the rockburst and microseismicity characteristics between sandstone and siltstone are also analysed in the selected zone. Finally, a simple 3D numerical model is employed to assess the rockburst risks in different excavation directions, the results of which agree well with field rockburst results. The formation mechanisms of different rockburst risks under the two excavation directions are discussed and analysed with microseismic data and numerical results. This study may be valuable for predicting rockburst based on microseismic techniques and managing rockburst risks in similar projects. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000495469800022 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/14857]  |
| 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.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Liaoning, Peoples R China; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Peng-Xiang,Feng, Xia-Ting,Feng, Guang-Liang,et al. Rockburst and microseismic characteristics around lithological interfaces under different excavation directions in deep tunnels[J]. ENGINEERING GEOLOGY,2019,260:-. |
| APA | Li, Peng-Xiang,Feng, Xia-Ting,Feng, Guang-Liang,Xiao, Ya-Xun,&Chen, Bing-Rui.(2019).Rockburst and microseismic characteristics around lithological interfaces under different excavation directions in deep tunnels.ENGINEERING GEOLOGY,260,-. |
| MLA | Li, Peng-Xiang,et al."Rockburst and microseismic characteristics around lithological interfaces under different excavation directions in deep tunnels".ENGINEERING GEOLOGY 260(2019):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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