Knowledge Management System of Institute of Rock and Soil Mechanics,CAS
| Analysis for Microseismic Energy of Immediate Rockbursts in Deep Tunnels with Different Excavation Methods | |
| Yu, Yang1; Chen, Bing-rui2; Xu, Chang-jie1; Diao, Xin-hong1; Tong, Li-hong1; Shi, Yu-feng1 | |
| 2017 | |
| Source Publication | INTERNATIONAL JOURNAL OF GEOMECHANICS
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| ISSN | 1532-3641 |
| Volume | 17Issue:5Pages:- |
| Abstract | This study integrates microseismic data and data from hundreds of rockbursts of different intensities that occurred in a water drainage tunnel and four deep headrace tunnels at Jinping II Hydropower Station in Sichuan Province, China. The tunnels with overburden depths between 1,900 and 2,525 m, the maximum principal stress of which reaches 63 MPa in a rock mass, is composed mainly of marble. The tunnels have a total length of 12.4km. The microseismic energy produced during the development of immediate rockbursts induced by the excavation by the drill-and-blast method (DBM) and a tunnel-boring machine (TBM) were studied. The results indicate that the daily maximum microseismic energy can be used as a basis for estimating rockburst intensity. The daily maximum microseismic energy (logarithm) corresponds to intense rockbursts (>6), moderate rockbursts (between 5 and 6), weak rockbursts (between 4 and 5), and no rockbursts (<4). Before the occurrence of intense rockbursts, there were numerous weak and moderate rockbursts during TBM excavation, whereas such a phenomenon was not observed during DBM excavation. The microseismic energy (logarithm) primarily concentrated in the range of 1 to 5 under TBM excavation, which is concentrated in the range of -1 to 4 under DBM excavation. For rockbursts of the same intensity, the range of microseismic energy remained the same for either type of excavation method. The distribution range of the microseismic energy moved in the direction of high energy as the level of rockburst intensity rose (intense rockbursts>moderate rockbursts>weak rockbursts>no rockburst). Microseismic energy can be used as a guideline for building a warning system and reduce the risk of rockbursts during construction. (C) 2016 American Society of Civil Engineers. |
| Keyword | Drill-and-blast method (DBM) Tunnel-boring machine (TBM) Immediate rockburst Microseismic events Microseismic energy Rockburst intensity |
| DOI | 10.1061/(ASCE)GM.1943-5622.0000805 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Geological |
| WOS ID | WOS:000398536900022 |
| Publisher | ASCE-AMER SOC CIVIL ENGINEERS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://119.78.100.198/handle/2S6PX9GI/4049 |
| Collection | 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 |
| Affiliation | 1.East China Jiaotong Univ, Coll Civil Engn & Architecture ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| Recommended Citation GB/T 7714 | Yu, Yang,Chen, Bing-rui,Xu, Chang-jie,et al. Analysis for Microseismic Energy of Immediate Rockbursts in Deep Tunnels with Different Excavation Methods[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2017,17(5):-. |
| APA | Yu, Yang,Chen, Bing-rui,Xu, Chang-jie,Diao, Xin-hong,Tong, Li-hong,&Shi, Yu-feng.(2017).Analysis for Microseismic Energy of Immediate Rockbursts in Deep Tunnels with Different Excavation Methods.INTERNATIONAL JOURNAL OF GEOMECHANICS,17(5),-. |
| MLA | Yu, Yang,et al."Analysis for Microseismic Energy of Immediate Rockbursts in Deep Tunnels with Different Excavation Methods".INTERNATIONAL JOURNAL OF GEOMECHANICS 17.5(2017):-. |
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| Analysis for Microse（2049KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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