Laboratory verification of the Diametrical Core Deformation Analysis (DCDA) developed for in-situ stress measurements

Akio Funato, Takatoshi Ito, Taito Shono

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

3 Citations (Scopus)

Abstract

DCDA is a new method for evaluating the in-situ stress of rocks based on the elliptical deformation of boring cores with stress relief. When a rock core sample is carved out by drilling, it becomes free from in-situ stress, and the expansion should occur elastically. If the condition of in-situ stress is anisotropic, the core must deform in an asymmetric manner. With the precise measurement of core diameters in each directions, the deviatoric stress S Hmax-Shmin and azimuths of SHmax and S min could be determined from the circumferential variation of the measured diameter. In order to confirm the reliability of DCDA, laboratory verifications were conducted. The estimated stresses by DCDA agreed well with the applied stresses, and the directions of rfmaxcoincide to the directions of the applied stresses. From these results, the effectiveness of DCDA was confirmed.

Original languageEnglish
Title of host publication46th US Rock Mechanics / Geomechanics Symposium 2012
Pages1407-1412
Number of pages6
Publication statusPublished - 2012
Event46th US Rock Mechanics / Geomechanics Symposium 2012 - Chicago, IL, United States
Duration: 2012 Jun 242012 Jun 27

Publication series

Name46th US Rock Mechanics / Geomechanics Symposium 2012
Volume2

Other

Other46th US Rock Mechanics / Geomechanics Symposium 2012
Country/TerritoryUnited States
CityChicago, IL
Period12/6/2412/6/27

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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