Frictional properties of the stressed limestone fracture

Z. Zhong, D. Elsworth, Y. J. Hu

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

Abstract

A standard triaxial apparatus was set up to perform sliding tests. Slide-hold-slide (SHS) tests, with hold times from 10 to 3000s and at invariant effective confining pressures of 1MPa, incremented to 3MPa and then 5MPa, were conducted on both dry and wet split limestone samples to study the evolution of fracture friction under holding and sliding processes. Limestone fracture shows time-dependent behaviors in SHS tests, friction drops (creep) gradually during hold periods, and recovers (healing) after re-slide. Frictional healing and creep increment are proportional with hold times, while are inversely proportional with effective confining pressures. Moreover, the wet sample displays heavier healing than the dry one, whereas creep increment of the wet sample is lighter than the dry one. We conclude that the evolution of limestone fracture friction is significantly controlled by mechanisms of fluid-rock interactions.

Original languageEnglish (US)
Title of host publication13th ISRM International Congress of Rock Mechanics
Editors Hassani, Hadjigeorgiou, Archibald
PublisherInternational Society for Rock Mechanics
ISBN (Electronic)9781926872254
StatePublished - Jan 1 2015
Event13th ISRM International Congress of Rock Mechanics 2015 - Montreal, Canada
Duration: May 10 2015May 13 2015

Publication series

Name13th ISRM International Congress of Rock Mechanics
Volume2015- MAY

Other

Other13th ISRM International Congress of Rock Mechanics 2015
CountryCanada
CityMontreal
Period5/10/155/13/15

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

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  • Cite this

    Zhong, Z., Elsworth, D., & Hu, Y. J. (2015). Frictional properties of the stressed limestone fracture. In Hassani, Hadjigeorgiou, & Archibald (Eds.), 13th ISRM International Congress of Rock Mechanics (13th ISRM International Congress of Rock Mechanics; Vol. 2015- MAY). International Society for Rock Mechanics.