Laboratory investigation of effect of gouge material on closure during shearing

A. A. Giwelli, K. Matsuki, Kiyotoshi Sakaguchi, H. Sekino, K. Okatsu

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

In this work, the effect of gouge materials on the non-linearity of the closure curve during shear was investigated in the direct shear tests by using mortar fracture replicas of sizes ranging from 100 mm to 200 mm, which were reproduced from a tensile fracture created in granite. Monotonic shear loading was applied at normal stresses of 0.3 and 1 MPa for shear displacements of 2 and 20 mm. The results showed that the non-linearity of the closure curve during shear increases with the presence of the gouge materials/debris that are produced in the shearing process. This is mainly because the gouge is soft to easily deform under the applied normal stress and the gouge materials are distributed non-uniformly around the contact areas. Thus, the normal stiffness during shear decreases not only with the decreasing matedness between the surfaces, but also with the presence of gouge materials.

Original languageEnglish
Publication statusPublished - 2011 Dec 6
Event45th US Rock Mechanics / Geomechanics Symposium - San Francisco, CA, United States
Duration: 2011 Jun 262011 Jun 29

Other

Other45th US Rock Mechanics / Geomechanics Symposium
CountryUnited States
CitySan Francisco, CA
Period11/6/2611/6/29

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Fingerprint Dive into the research topics of 'Laboratory investigation of effect of gouge material on closure during shearing'. Together they form a unique fingerprint.

Cite this