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Title: Estimating changes in rock permeability due to thermal-mechanical effects

Estimating changes in rock permeability due to thermal-mechanical effects This paper presents results of a modeling study of changes in fracture permeability due to thermal-mechanical effects associated with the potential geological repository at Yucca Mountain. a methodology for estimating changes in permeability is developed and applied to the Drift Scale Test (DST) now being conducted in the Exploratory Studies Facility (ESF) at Yucca Mountain. Temperature, stress, and displacement of rock in the heated zone are presented along with predicted zones where slip on fractures may occur. The zones of predicted fracture slip are used as a basis for predicting where permeability may be changed. this new procedure goes beyond previous models that relate stress to strain or displacement, and provides information about rock response that is needed for design of future tests at Yucca Mountain. Our results also contribute to the understanding of coupled processes in the near-field environment of a repository.
Authors: ; ;
Publication Date:
OSTI Identifier:641084
Report Number(s):UCRL-JC--128799
ON: DE98057731; CNN: W-7405-Eng-48
DOE Contract Number:W-7405-ENG-48
Resource Type:Technical Report
Data Type:
Resource Relation:Other Information: PBD: 1 Oct 1997
Research Org:Lawrence Livermore National Lab., CA (United States)
Sponsoring Org:USDOE Office of Civilian Radioactive Waste Management, Washington, DC (United States)
Country of Publication:United States
Language:English
Subject: 58 GEOSCIENCES; 05 NUCLEAR FUELS; ROCKS; PERMEABILITY; YUCCA MOUNTAIN; MATHEMATICAL MODELS; FRACTURES; RADIOACTIVE WASTE STORAGE; GEOLOGY; STRESSES