Hydrogeomechanical investigation of an excavation damaged zone in the Horonobe Underground Research Laboratory
幌延深地層研究所における掘削損傷領域の力学的・水理的検討
青柳 和平; 津坂 仁和*; 野原 慎太郎*; 窪田 健二*; 常盤 哲也*; 近藤 桂二*; 稲垣 大介*
Aoyagi, Kazuhei; Tsusaka, Kimikazu*; Nohara, Shintaro*; Kubota, Kenji*; Tokiwa, Tetsuya*; Kondo, Keiji*; Inagaki, Daisuke*
In a construction of a deep underground facility such as repository for high-level radioactive waste (HLW) disposal, significant changes in hydrogeomechanical properties around a gallery are expected. This zone is called an Excavation Damaged Zone (EDZ). For the safety of HLW disposal, it is necessary to investigate extent and hydrogeomechanical characteristics of an EDZ. In this research, the authors conducted in situ surveys such as seismic refraction survey, geological observation around a gallery, borehole television survey, and hydraulic tests in the Horonobe Underground Research Laboratory. From the results of those surveys, the authors concluded that the extent of the area with high-density of fractures and high hydraulic conductivity was estimated to be about 0.2 to 1.2 m into the gallery wall. The authors also compiled the information of the extent of an EDZ and hydrogeomechanical properties inside and outside of an EDZ as a conceptual model. Since the conceptual models provide the basic idea for determining flow and solute transport in an EDZ, the result of this research provides a useful data for a safety assessment of the HLW disposal.
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 : 8 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
特許データ :
PDF :
論文URL :
キーワード : Excavation Damaged Zone; Hydraulic conductivity; Seismic velocity; Seismic refraction survey
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論文解説記事
(成果普及情報誌)
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受委託・共同研究相手機関 : 電力中央研究所
 
登録番号 : BB20140945
抄録集掲載番号 : 42001483
論文投稿番号 : 15111
Accesses  (From Jun. 2, 2014)
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