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Experimental study of the hydro-mechanical behavior of rock joints using a parallel-plate model containing contact areas and artificial fractures

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タイトル: Experimental study of the hydro-mechanical behavior of rock joints using a parallel-plate model containing contact areas and artificial fractures
著者: Li, Bo / Jiang, Yujing / Koyama, Tomofumi / Jing, Lanru / Tanabashi, Yoshihiko
発行日: 2008年 3月
出版者: Elsevier BV
引用: International Journal of Rock Mechanics and Minings Sciences, 45(3), pp.362-375; 2008
抄録: In recent years, geological disposal of radioactive wastes is considered to be the most promising option, which requires the understanding of the coupled mechanical, hydraulic and thermal properties of the host rock masses and rock fractures. The hydromechanical behavior and properties of rock fractures are usually determined by laboratory experiments on fracture specimens that serve as the basic building block of the constitutive models of fractured rock masses. Laboratory testing of rock fractures involve a number of technical issues that may have significant impacts on the reliability and applicability of the testing results, chief among them are the quantitative estimation of the evolutions of hydraulic transmissivity fields of fractures during shear under different normal constraint conditions, and the sealing techniques when fluid flow during shear is involved. In this study, a new shear-flow testing apparatus with specially designed fluid sealing techniques for rock fractures were developed, under constant normal load (CNL) or constant normal stiffness (CNS) constraint. The topographical data of all fracture specimens were measured before testing to constitute the geometrical models for simulating the change of mechanical aperture distributions during shearing. A number of shear-flow coupling tests were carried out on three kinds of rock fracture specimens to evaluate the influence of morphological properties of rock fractures on their hydro-mechanical behaviour. Some empirical relations were proposed to evaluate the effects of contact area and surface roughness on the behavior of fluid flow through rock fractures.
キーワード: Coupled shear-flow test / Hydro-mechanical / Rock fracture / Roughness / Transmissivity
URI: http://hdl.handle.net/10069/29684
ISSN: 13651609
DOI: 10.1016/j.ijrmms.2007.06.004
権利: © 2007 Elsevier Ltd. / NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Rock Mechanics and Minings Sciences. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Rock Mechanics and Minings Sciences, 45, 3(2012)
資料タイプ: Journal Article
原稿種類: author
出現コレクション:060 学術雑誌論文

引用URI : http://hdl.handle.net/10069/29684



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