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Microseismic characteristics of rockburst development in deep TBM tunnels with alternating soft-hard strata and application to rockburst warning: A case study of the Neelum-Jhelum hydropower project
Feng, Guang-Liang1; Chen, Bing-Rui1; Xiao, Ya-Xun1; Jiang, Quan1; Li, Peng-Xiang2; Zheng, Hong1; Zhang, Wei2
2022-04-01
Source PublicationTUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
ISSN0886-7798
Volume122Pages:16
AbstractThe rockbursts that occur when tunneling through deep, hard rock can result in serious harm to workers, mechanical damage, delays, and economic losses. As a result, obtaining a warning of impending rockburst remains a challenge in rock engineering around the world. Unfortunately, the rockbursts that occur in deep tunnels with alternating soft-hard strata have development laws and mechanisms that are unclear and so are particularly difficult to predict. This paper focuses on the characteristics of the microseismicity occurring in deep tunnels constructed within alternating soft-hard strata and using the data to warn of rockburst occurrence. The study uses the Neelum-Jhelum hydropower project in Pakistan (tunnels with a maximum burial depth of 1,890 m) as an engineering background. The temporal evolution of the microseismicity and the fracturing mechanism involved in the rockburst development process in alternating soft-hard strata were thus revealed. Thresholds for six microseismic (MS) parameters that can be used to warn of rockbursts of different intensities in different lithologies were thus found based on 58 recorded cases (recorded during a month-long period of MS monitoring). These thresholds were subsequently used (together with MS monitoring) to warn of rockbursts of a certain intensity in the corresponding lithology during the excavation of subsequent tunnels. The warning results obtained agree with the actual situation when the right thresholds for the corresponding lithologies were used. The characteristic values of the six MS parameters used for rockburst warning in different lithologies were also discussed. Our results provide a useful reference for understanding and warning of rockbursts in deep tunnels in rockmasses with similarly complex lithologies.
KeywordRockburst Microseismicity Mechanism Warning Alternating soft-hard strata Tunnel
DOI10.1016/j.tust.2022.104398
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51621006] ; National Natural Science Foundation of China[41972295]
WOS Research AreaConstruction & Building Technology ; Engineering
WOS SubjectConstruction & Building Technology ; Engineering, Civil
WOS IDWOS:000764999600002
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://119.78.100.198/handle/2S6PX9GI/34700
Collection中科院武汉岩土力学所
Corresponding AuthorFeng, Guang-Liang
Affiliation1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
2.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Liaoning, Peoples R China
First Author AffilicationInstitute of Rock and Soil Mechanics, chinese Academy of sciences
Corresponding Author AffilicationInstitute of Rock and Soil Mechanics, chinese Academy of sciences
Recommended Citation
GB/T 7714
Feng, Guang-Liang,Chen, Bing-Rui,Xiao, Ya-Xun,et al. Microseismic characteristics of rockburst development in deep TBM tunnels with alternating soft-hard strata and application to rockburst warning: A case study of the Neelum-Jhelum hydropower project[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2022,122:16.
APA Feng, Guang-Liang.,Chen, Bing-Rui.,Xiao, Ya-Xun.,Jiang, Quan.,Li, Peng-Xiang.,...&Zhang, Wei.(2022).Microseismic characteristics of rockburst development in deep TBM tunnels with alternating soft-hard strata and application to rockburst warning: A case study of the Neelum-Jhelum hydropower project.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,122,16.
MLA Feng, Guang-Liang,et al."Microseismic characteristics of rockburst development in deep TBM tunnels with alternating soft-hard strata and application to rockburst warning: A case study of the Neelum-Jhelum hydropower project".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 122(2022):16.
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