Modeling damage processes in laboratory tests at the Horonobe Underground Research Laboratory
幌延深地層研究所における岩石の損傷プロセスのモデリングに関する検討
朝比奈 大輔*; 青柳 和平; 津坂 仁和*; Houseworth, J.*; Birkholzer, J.*
Asahina, Daisuke*; Aoyagi, Kazuhei; Tsusaka, Kimikazu*; Houseworth, J.*; Birkholzer, J.*
We present ongoing collaborative work applying a rigid-body-spring network (RBSN), a special type of lattice model, to simulate laboratory experiments conducted in the Horonobe Underground Research Laboratory (URL) in Japan. The Horonobe URL Project, which began in 2001, has developed a URL at a depth of about 350 m in a sedimentary rock called the Koetoi and Wakkanai formation. The basic capabilities of RBSN modeling are demonstrated through two standard laboratory tests: (1) split-cylinder (Brazilian) test; and (2) uniaxial compression test. Bulk material properties (i.e., Young's modulus, the strength parameters such as tensile strength, cohesion, and internal friction angle) estimated by the experiments are directly used for the mechanical parameters of springs. Tensorial representations of stress are obtained within the lattice elements and compared with Mohr-Coulomb failure criteria for fracture simulation. Agreement between the numerical and laboratory test results is good with respect to stress development, tensile/compressive strength, and fracture pattern, under the assumption of homogeneous systems using the RBSN model. The connection of hydraulically active fractures is also addressed for both of the simulation studies.
使用言語 : English
掲載資料名 : Proceedings of 8th Asian Rock Mechanics Symposium (ARMS-8) (USB Flash Drive)
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ページ数 : 9 Pages
発行年月 : 2014/10
出版社名 :
発表会議名 : 8th Asian Rock Mechanics Symposium (ARMS-8)
開催年月 : 2014/10
開催都市 : Sapporo
開催国 : Japan
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PDF :
論文URL :
キーワード : Fracture; Lattice models; Underground Research Laboratory
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広報プレスリリース :
論文解説記事
(成果普及情報誌)
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登録番号 : BB20140949
抄録集掲載番号 : 42001486
論文投稿番号 : 15114
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