Failure study of weathered granite based on critical slowing down theory and acoustic emission b-value

Huang, Qizheng; Zhao, Kang; Yan, Yajing; Wu, Jun; Nie, Qiang; Chen, Jiale; Xiao, Weiling; Wang, Huiping

doi:10.1007/s43452-023-00747-y

Artykuł - szczegóły

Tytuł artykułu

Failure study of weathered granite based on critical slowing down theory and acoustic emission b-value

Autorzy

Huang Qizheng , Zhao Kang , Yan Yajing , Wu Jun , Nie Qiang , Chen Jiale , Xiao Weiling , Wang Huiping

Wybrane pełne teksty z tego czasopisma

http://www.springer.com/journal/43452

Identyfikatory

DOI

10.1007/s43452-023-00747-y

Warianty tytułu

Języki publikacji

Abstrakty

To investigate the precursor characteristics of failure of weathered granite (WG), we conducted uniaxial compression tests on WG specimens using the RMT-150C rock mechanics testing system and the PCI-II acoustic emission (AE) device. We analyzed the AE parameters based on the critical slowing down (CSD) and AE b-value theoretical methods. The study shows that the peak strain value of WG under uniaxial compression is < 1% and the stress falls off rapidly after the peak, and the specimen mainly undergoes brittle failure. The failure process can be divided into four stages: compression stage, elastic deformation stage, plastic development stage, and post-peak failure stage, in which the compression stage lasts longer. The ringing count rate and its cumulative amount can effectively indicate the process of WG failure during loading. As the failure nears, microcracks within the WG accumulate and expand, leading to the appearance of macroscopic cracks. At the same time, the cumulative ringing count rate increases rapidly while the ringing count rate converges to the peak. Furthermore, the rapid increase of autocorrelation coefficient and variance obtained from the CSD theory analysis of ringing counts can be used as a precursor signal of WG failure. The “inflection point” before the sharp rise of the variance curve can be regarded as an early warning point of failure. Based on the characteristic that the b-value shows a large rate fluctuation decrease before the failure of WG, the autocorrelation coefficient and variance variation law obtained by CSD theory and the early warning point are analyzed simultaneously with the b-value variation law, which can accurately grasp the failure characteristics of WG in mines.

Słowa kluczowe

weathered granite uniaxial compression acoustic emission critical slowing down acoustic emission b-value

granit emisja akustyczna kopalnia

Wydawca

Springer
Wrocław University of Science and Technology

Czasopismo

Archives of Civil and Mechanical Engineering

Rocznik

2023

Tom

Vol. 23, no. 3

Strony

art. no. e196, 2023

Opis fizyczny

Bibliogr. 52 poz., wykr.

Twórcy

autor

Huang Qizheng

School of Civil and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China

autor

Zhao Kang

zkky2021@163.com

School of Civil and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China
Solids Waste and Chemicals Management Center, Ministry of Ecology and Environment, Beijing 100029, China

autor

Yan Yajing

Solids Waste and Chemicals Management Center, Ministry of Ecology and Environment, Beijing 100029, China

autor

Wu Jun

School of Civil and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China

autor

Nie Qiang

School of Civil and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China

autor

Chen Jiale

School of Civil and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China

autor

Xiao Weiling

School of Civil and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China

autor

Wang Huiping

School of Civil and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-c6163b19-fb46-4020-8b98-b331df698cc5