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Discrete element simulation of fracture surface damage and gouge particle evolution in a rock fracture segment
Stockholm University, Faculty of Science, Department of Geological Sciences.
2013 (English)In: Rock Characterisation, Modelling and Engineering Design Methods / [ed] Xia-Ting Feng, John A. Hudson, Fei Tan, Boca Raton, USA: CRC Press, 2013, 385-390 p.Conference paper, Published paper (Refereed)
Abstract [en]

The surface damage and evolution of gouge materials in rock fractures or faults undergoing shear can change fracture properties in terms of shear strength and dilation, fluid transmissivity and retardation for contaminants. In order to conceptually understand fracture surface damage and gouge behaviors in fracture voids, the particle mechanics models were used to simulate the process of gouge particle plowed off from fracture asperities and subsequently their evolution in a fracture segment undergoing shear. The results show that significant abrasion and damage occurred by wearing the contact asperities and cracking the fracture surfaces. Gouge particles behave in two different ways under low and high normal stresses, respectively. Under low normal stress, gouge particles mainly roll with the moving fracture walls, with little surface damage. Under high normal stress, gouge particles can be crushed into a few major pieces and a large number of minor comminuted particles, accompanied by more severe damage (abrasion and micro-cracking).

Place, publisher, year, edition, pages
Boca Raton, USA: CRC Press, 2013. 385-390 p.
National Category
Geology
Identifiers
URN: urn:nbn:se:su:diva-109027ISI: 000342685900064ISBN: 978-1-138-00057-5 (print)OAI: oai:DiVA.org:su-109027DiVA: diva2:762062
Conference
3rd International-Society-for-Rock-Mechanics (ISRM) SINOROCK Symposium, JUN 18-20, 2013, Shanghai, PEOPLES R CHINA
Note

AuthorCount:1;

Available from: 2014-11-10 Created: 2014-11-10 Last updated: 2014-11-10Bibliographically approved

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