TY - GEN
T1 - Frictional properties of the stressed limestone fracture
AU - Zhong, Z.
AU - Elsworth, D.
AU - Hu, Y. J.
N1 - Publisher Copyright:
© 2015 by the Canadian Institute of Mining, Metallurgy & Petroleum and ISRM.
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:85044233977
T3 - 13th ISRM International Congress of Rock Mechanics
BT - 13th ISRM International Congress of Rock Mechanics
A2 - Hassani, null
A2 - Hadjigeorgiou, null
A2 - Archibald, null
PB - International Society for Rock Mechanics
T2 - 13th ISRM International Congress of Rock Mechanics 2015
Y2 - 10 May 2015 through 13 May 2015
ER -