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Criterion for fracture transition to critical stage

Ekaterina Damaskinskaya, Dmitry Frolov, Dina Gafurova, Dmitry Korost and Ivan Panteleev
Criterion for fracture transition to critical stage
Interpretation (Tulsa) (August 2017) 5 (4): SP1-SP8

Abstract

We have developed an analysis of data obtained in laboratory investigations of deformation of rocks by acoustic emission and X-ray microtomography. We found that defect accumulation occurs in fundamentally differing manners during loading. At first, defects are generated randomly and have a specific size determined by a typical structural element of a material (e.g., a grain in granite). Then the defects with sizes not dictated by the material structure are generated. The interaction between these defects gives rise to critical defects that are capable of self-development. In all probability, a sample breakdown results from the evolution of the ensemble of critical defects. We found that the fracture stages can be distinguished by the type of energy distribution function of the acoustic emission signals. At the first stage, the distribution is approximated by an exponential function, whereas the second stage is characterized by a power-law function that points to a self-organized criticality state. This approach allows an early prediction (at early stages of deformation) of the spatial region in which a fault can be formed.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 5
Serial Issue: 4
Title: Criterion for fracture transition to critical stage
Affiliation: Ioffe Institute, St. Petersburg, Russian Federation
Pages: SP1-SP8
Published: 201708
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 47
Accession Number: 2017-086072
Categories: Structural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: Lomonosov Moscow State University, RUS, Russian FederationRussian Academy of Science, Ural Branch, Institute of Continuous Media Mechanics, RUS, Russian Federation
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201745
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