Estimation of rock mass stress state based on convergence measurement during gallery excavation
青柳 和平; 名合 牧人*; 亀村 勝美*; 菅原 健太郎*
Aoyagi, Kazuhei; Nago, Makito*; Kamemura, Katsumi*; Sugawara, Kentaro*
Estimates of rock mass stress state and the mechanical characteristics of rock mass are important in the design of deep underground structures such as high-level radioactive waste disposal repositories. Stress measurements are conducted in boreholes to provide estimates of stress state. However, measurement results can vary highly as a result of rock mass heterogeneity, which causes difficulty in stress state evaluation. This study establishes a practical and effective method for estimating in situ stress based on the convergence measurement results obtained during gallery construction of the Horonobe Underground Research Laboratory (URL) project. The convergence was measured in various directions of the URL loop gallery to allow determination of the stress state over a large area. A back-analysis method was developed using the convergence measured during gallery excavation at 350 m depth. This method was applied to estimate the stress state corresponding to the rock mass behavior around the URL. The analysis results show good agreement with the in situ stress state reported in previous studies and confirm the applicability of the proposed method.
使用言語 : English
掲載資料名 : Proceedings of 9th Asian Rock Mechanics Symposium (ARMS-9) (USB Flash Drive)
ページ数 : 10 Pages
発行年月 : 2016/10
出版社名 :
発表会議名 : 9th Asian Rock Mechanics Symposium (ARMS-9)
開催年月 : 2016/10
開催都市 : Bali
開催国 : Indonesia
特許データ :
論文URL :
キーワード : In situ stress; Convergence; Loop gallery; Back analysis
使用施設 :
広報プレスリリース :
受委託・共同研究相手機関 :
登録番号 : BB20160337
抄録集掲載番号 : 45000096
論文投稿番号 : 18432
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