Evaluation of excavation-induced changes in rock permeability

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Authors:Kelsall, P. C.; Case, J. B.; Chabannes, Charles R.
Author Affiliations:Primary:
D'Appolonia Consult. Eng., Albuquerque, NM, United States
Volume Title:International Journal of Rock Mechanics and Mining Sciences
Source:International Journal of Rock Mechanics and Mining Sciences, 21(3), p.123-135. Publisher: Pergamon, Oxford-New York, International. ISSN: 0020-7624
Publication Date:1984
Note:In English. 44 refs.; illus.
Summary:The nature of the changes in permeability around an underground opening induced by blast-damage or stress-relief is an important factor in the design of nuclear waste repositories in rocks such as granite or basalt. Changes in stress and corresponding changes in rock mass hydraulic conductivity are analyzed for a circular shaft using simplifying assumptions regarding fracture geometry and initial stress state. Stress distributions around tha shaft are calculated using closed-form solutions and are related to changes in hydraulic conductivity using a form of the cubic law for flow through fractured media. Blasting may result in large increases in hydraulic conductivity immediately adjacent to an opening.
Subjects:Basalts; Blasting; Case studies; Damage; Design; Distribution; Engineering geology; Excavations; Granites; Ground water; Hydraulic conductivity; Igneous rocks; In situ; Models; Permeability; Plutonic rocks; Porous materials; Radioactive waste; Rock mechanics; Stress; Surveys; Testing; Tunnels; Underground installations; Volcanic rocks; Waste disposal; Colorado; Europe; Orebro Sweden; Scandinavia; Stripa region; Sweden; United States; Western Europe; Changes; Edgar Mine; Materials, properties
Record ID:1985002428
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute.
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