Vinciguerra SC, Greco A, Pluchino A, Rapisarda A, Tsallis C. Acoustic Emissions in Rock Deformation and Failure: New Insights from Q-Statistical Analysis.
ENTROPY (BASEL, SWITZERLAND) 2023;
25:e25040701. [PMID:
37190489 PMCID:
PMC10138155 DOI:
10.3390/e25040701]
[Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/14/2023] [Accepted: 04/18/2023] [Indexed: 05/17/2023]
Abstract
We propose a new statistical analysis of the Acoustic Emissions (AE) produced in a series of triaxial deformation experiments leading to fractures and failure of two different rocks, namely, Darley Dale Sandstone (DDS) and AG Granite (AG). By means of q-statistical formalism, we are able to characterize the pre-failure processes in both types of rocks. In particular, we study AE inter-event time and AE inter-event distance distributions. Both of them can be reproduced with q-exponential curves, showing universal features that are observed here for the first time and could be important in order to understand more in detail the dynamics of rock fractures.
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