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Linear and nonlinear attributes of ultrasonic time series recorded from experimentally loaded rock samples and total failure prediction
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SYSNO ASEP 0087473 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Linear and nonlinear attributes of ultrasonic time series recorded from experimentally loaded rock samples and total failure prediction Title Lineární a nelineární vlastnosti ultrazvukové časové série, zaznamenané z experimentálně zatěžovaných horninových vzorků a predikce totálního rozrušení Author(s) Rudajev, Vladimír (GLU-S) RID, SAI
Číž, R. (AU)Source Title International Journal of Rock Mechanics and Mining Sciences. - : Elsevier - ISSN 1365-1609
Roč. 44, č. 3 (2007), s. 457-467Number of pages 11 s. Publication form WWW - WWW Language eng - English Country GB - United Kingdom Keywords ultrasonic emission ; microfracturing ; time series ; autocorrelation ; fractal dimensions ; neural networks Subject RIV DC - Siesmology, Volcanology, Earth Structure R&D Projects GA205/06/0906 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z30130516 - GLU-S (2005-2011) AV0Z30460519 - USMH-B (2005-2011) UT WOS 000244217400010 EID SCOPUS 33846325122 DOI 10.1016/j.ijrmms.2006.08.001 Annotation The monitoring of the ultrasonic and acoustic emission occurring during loading of rocks provides important information about the fracturing process taking place in the rock sample. This study analyzed and compared several parameters derived from the time series of the UE activity for short- and middle-term experiments. The comparison between linear correlation coefficients, nonlinear correlation coefficients, variogram values and fractal dimensions is carried out. All analyzed parameters show precursor behaviour prior to the rock sample total failure. Developed multi-channel algorithm, based on artificial neural networks, is proposed for the discrimination between stable and unstable state of rock sample. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2008
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