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Rock Mechanics and Rock Engineering

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12.04.2020 | Original Paper

Microseismic Monitoring to Characterize Structure-Type Rockbursts: A Case Study of a TBM-Excavated Tunnel

verfasst von: Quan-Sheng Liu, Jian Wu, Xiao-Ping Zhang, Lie-Xian Tang, Chen Bi, Wei-Wei Li, Jin-Lin Xu

Erschienen in: Rock Mechanics and Rock Engineering | Ausgabe 7/2020

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Abstract

Numerous rockbursts controlled by small-scale structural planes have occurred frequently during tunnel boring machine (TBM) excavation in a headrace tunnel. To understand the evolutionary process of structure-type rockbursts, a real-time microseismic (MS) monitoring system was deployed during the advancement of TBM. By combination with the true reflection tomography technique, a new method is proposed to estimate the P-wave velocity for in situ hypocentral locations. A typical structure-type rockburst is investigated to study the relationship between the rockburst characteristics and microseismicity. By further analyzing the temporal–spatial distribution of microseismicity and the quantitative interpretation of the MS source parameters, the potential failure zone and the precursor features are recognized during the development of this structure-type rockburst. Based on the MS monitoring results, some proactive treatment measures are put forward for the mitigation of rockburst hazards. The results of the current research can contribute to the understanding of structure-type rockbursts and provide valuable references for rockburst forewarning and construction management in similar tunneling projects.

Vorheriger Artikel Analysis of Deformation Characteristics of Fully Grouted Rock Bolts Under Pull-and-Shear Loading

Nächster Artikel A New Safety Control Method of Blasting Excavation in High Rock Slope with Joints

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Titel: Microseismic Monitoring to Characterize Structure-Type Rockbursts: A Case Study of a TBM-Excavated Tunnel
verfasst von: Quan-Sheng Liu
Jian Wu
Xiao-Ping Zhang
Lie-Xian Tang
Chen Bi
Wei-Wei Li
Jin-Lin Xu
Publikationsdatum: 12.04.2020
Verlag: Springer Vienna
Erschienen in: Rock Mechanics and Rock Engineering / Ausgabe 7/2020
Print ISSN: 0723-2632
Elektronische ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-020-02111-5

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