A method for measurement of rock stress change - Cross-sectional borehole deformation method -

• OBARA Yuzo

  Graduate School of Science and Technology, Kumamoto University,

• YOSHINAGA Toru

  Faculty of Engineering, Kumamoto University,

• KATAOKA Minami

  Graduate School of Science and Technology, Kumamoto University,

• YOKOYAMA Tatsuya

  Energy Division, OYO Co. Ltd.,

抄録

A method for measurement of stress change is suggested to monitor rock stress using a borehole. The two-dimensional state of stress change in a plane perpendicular to the axis of a borehole drilled within a rock mass can be measured by this method, which is named the Cross-sectional Borehole Deformation Method (CBDM). In this paper, the theory of the CBDM is firstly described, as well as the prototype instrument and theoretical procedure for correcting eccentric positioning of the instrument in the borehole.Then the estimation of the stress change is demonstrated in a laboratory experiment, using a granite plate with a borehole. Finally, applying the CBDM to measured stress change around an underground cavern during and after excavation, the changes of rock stress distribution around the cavern is shown. It makes clear that stress change in the immediate rock mass of the cavern can be estimated by the CBDM and that the CBDM is available for measuring rock stress change.

収録刊行物

• International Journal of the JSRM

  International Journal of the JSRM 10 (1), 5-14, 2014

  一般社団法人 岩の力学連合会

キーワード

• Rock stress measurement
• Stress change
• Cross-sectional Borehole Deformation Method (CBDM)
• In-situ Measurement

詳細情報

• CRID: 1390001205479185920
• NII論文ID: 130004709082
• DOI: 10.11187/ijjcrm.10.5
• ISSN: 21864225
• HANDLE: 2298/41961
• Web Site: https://kumadai.repo.nii.ac.jp/records/31142
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可