Mechanical Characterization Of Densely Welded Apache Leap Tuff
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Mechanical Characterization Of Densely Welded Apache Leap Tuff
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Author :
language : en
Publisher:
Release Date : 1991
Mechanical Characterization Of Densely Welded Apache Leap Tuff written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
An empirical criterion is formulated to describe the compressive strength of the densely welded Apache Leap tuff. The criterion incorporates the effects of size, L/D ratio, loading rate and density variations. The criterion improves the correlation between the test results and the failure envelope. Uniaxial and triaxial compressive strengths, Brazilian tensile strength and elastic properties of the densely welded brown unit of the Apache Leap tuff have been determined using the ASTM standard test methods. All tuff samples are tested dry at room temperature (22 " 2°C), and have the core axis normal to the flow layers. The uniaxial compressive strength is 73.2 " 16.5 MPa. The Brazilian tensile strength is 5.12 " 1.2 MPa. The Young's modulus and Poisson's ratio are 22.6 " 5.7 GPa and 0.20 " 0.03. Smoothness and perpendicularity do not fully meet the ASTM requirements for all samples, due to the presence of voids and inclusions on the sample surfaces and the sample preparation methods. The investigations of loading rate, L/D radio and cyclic loading effects on the compressive strength and of the size effect on the tensile strength are not conclusive. The Coulomb strength criterion adequately represents the failure envelope of the tuff under confining pressures from 0 to 62 MPa. Cohesion and internal friction angle are 16 MPa and 43 degrees. The brown unit of the Apache Leap tuff is highly heterogeneous as suggested by large variations of the test results. The high intrinsic variability of the tuff is probably caused by the presence of flow layers and by nonuniform distributions of inclusions, voids and degree of welding. Similar variability of the properties has been found in publications on the Topopah Spring tuff at Yucca Mountain. 57 refs., 32 figs., 29 tabs.
Mechanical Characterization Of Densely Welded Apache Leap Tuff
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Author : K. Fuenkajorn
language : en
Publisher:
Release Date : 1991
Mechanical Characterization Of Densely Welded Apache Leap Tuff written by K. Fuenkajorn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Volcanic ash, tuff, etc categories.
Rock Mechanics As A Multidisciplinary Science
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Author : Jean-Claude Roegiers
language : en
Publisher: CRC Press
Release Date : 2020-12-18
Rock Mechanics As A Multidisciplinary Science written by Jean-Claude Roegiers and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-18 with Technology & Engineering categories.
Papers in the proceedings of the 32nd U.S. Symposium on Rock Mechanics were solicited to address the theme of 'Rock Mechanics as a Multidisciplinary Science'. The major goal was to assemble scientists and practitioners from various fields with interrelated interests in rock mechanics to share their common problems and approaches. The proceedings include three papers related to a special session on 'Lunar Rock Mechanics', as well as 121 technical papers covering areas such as: field observations, in-situ stresses, instrumentation/measurement techniques, fracturing, rock properties, dynamics/seismicity, modelling, laboratory testing, discontinuities/fluid flow, design, wellbore stability, and analysis.
Sealing Of Boreholes And Underground Excavations In Rock
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Author : K. Fuenkajorn
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Sealing Of Boreholes And Underground Excavations In Rock written by K. Fuenkajorn and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Sealing of boreholes and underground excavations has not received much engineering attention until fairly recently. The growing awareness of and sensitivity to environmental concerns of the technical community as well as of the public at large has resulted in an increasing recognition of the fact that these geological penetrations may have an environmental impact. The issue of possible contamination resulting from migration along boreholes, adits, shafts or tunnels unquestionably has been raised most forcefully with in the context of nuclear waste disposal. Several nuclear waste disposal programs, notably the Civilian and the Defence programs of the US De partment of Energy, the US Nuclear Regulatory Commission and the Canadian and Swedish radioactive waste disposal programs have conducted major research efforts aimed at developing adequate seal designs for penet rations in host rock formations for high-level nuclear waste repositories. While a considerable data base has been gathered over the last two decades or so with regard to the performance of seals, most of the information is presented in research reports and widely scattered papers in journals and proceedings of conferences. Hence, the materials are not readily accessible to potential users such as designers, contractors or regulators who are not familiar with nuclear waste disposal programs.
Monthly Catalogue United States Public Documents
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Author :
language : en
Publisher:
Release Date : 1994
Monthly Catalogue United States Public Documents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Government publications categories.
Atomic Energy And Nuclear Power
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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1992
Atomic Energy And Nuclear Power written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Government publications categories.
Monthly Catalog Of United States Government Publications
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Author :
language : en
Publisher:
Release Date : 1994
Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Government publications categories.
Rock Mechanics
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Author : Jaak J.K. Daemen
language : en
Publisher: CRC Press
Release Date : 1995-01-01
Rock Mechanics written by Jaak J.K. Daemen and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995-01-01 with Technology & Engineering categories.
This volume presents the proceedings of a symposium on rock mechanics, held in the USA in 1995. Topics covered include: rock dynamics; tool-rock interaction; radioactive waste disposal; underground mining; fragmentation and blasting; theoretical and model studies; hydrology; and rock creep.
Title List Of Documents Made Publicly Available
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Author : U.S. Nuclear Regulatory Commission
language : en
Publisher:
Release Date : 1991
Title List Of Documents Made Publicly Available written by U.S. Nuclear Regulatory Commission and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Nuclear energy categories.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1992
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Power resources categories.