Study on the damage and failure characteristics of shale using micro-focus X-ray computed tomography (μ-CT)

Y. T. Duan, X. Li, J. M. He, P. G. Ranjith

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

In order to figure out the damage and failure characteristics of Longmaxi shale in deformation and failure under loading, three cylindrical specimens were prepared to conduct real- time uniaxial tests. Micro-focus X-ray computed tomography (μ-CT) at different stress levels were used to obtain reconstructed stereograms, and horizontal CT images were obtained for analysis. Based on the scanning results, the initial mineral and pore distribution were extracted and found that they have a combined influence on the compression strength of shale. The cracking evolution were first characterized quantitatively by the changing of pore ratio and crack volume. Moreover, the final crack morphologies were established and the failure degree was assessed by crack volume. The effect of internal mineral and pore evolution on the fracture mode was discussed and showed that the scattered mineral has little effect on the final crack and the increase in pore ratio related to the crack volume.

Original languageEnglish
Title of host publicationRock Mechanics for Natural Resources and Infrastructure Development- Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019
EditorsSergio A.B. da Fontoura, Ricardo José Rocca, José Félix Pavón Mendoza
PublisherCRC Press
Pages1157-1164
Number of pages8
ISBN (Print)9780367422844
Publication statusPublished - 2020
EventInternational Congress on Rock Mechanics and Rock Engineering 2019 - Foz do Iguaçu, Brazil
Duration: 13 Sept 201918 Sept 2019
Conference number: 14th
http://www.isrm2019.com/

Publication series

NameRock Mechanics for Natural Resources and Infrastructure Development- Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019

Conference

ConferenceInternational Congress on Rock Mechanics and Rock Engineering 2019
Abbreviated titleISRM 2019
Country/TerritoryBrazil
CityFoz do Iguaçu
Period13/09/1918/09/19
Internet address

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