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Effect of Temperature and Confining Pressure on Permeability during Deformation and Failure of Shikotsu Welded Tuff

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Title: Effect of Temperature and Confining Pressure on Permeability during Deformation and Failure of Shikotsu Welded Tuff
Authors: Alam A.K.M., Badrula Browse this author
Niioka, Masaki Browse this author
Fujii, Yoshiaki Browse this author →KAKEN DB
Kodama, Jun-ichi Browse this author →KAKEN DB
Sugawara, Takayuki Browse this author
Keywords: THM
Permeability
Consolidation
Compression
Welded tuff
Issue Date: 15-Oct-2012
Publisher: Korean Society for Rock Mechanics
Journal Title: Proceedings of the 7th Asian Rock Mechanics Symposium
Volume: 7
Start Page: 563
End Page: 572
Abstract: Permeability variation during deformation and failure in triaxial test was considered for Shikotsu welded tuff. Pure water saturated cylindrical test specimens of 30 mm in diameter and length of 60 mm with constant flow rate method at 0.3 ml/min was introduced for compression, with strain rate of 10-5 s-1 on the consolidated samples under 1 MPa, 5 MPa, 10 MPa and 15 MPa for 24 hours until the axial strain reached at 10% in 22ºC and 80ºC. Permeability at the end of 15 MPa consolidation was lower than those of under 1-10 MPa. In compression (i) permeability basically decreased with slight disturbances around peak load points due to rapid volumetric change (ii) under 1 MPa the permeability was larger, compare to 5-15 MPa confining pressure at 22ºC (iii) no apparent confining pressure dependency was observed at 80ºC. The permeability was lower at 80ºC than 22ºC. However, more water flow is expected for the same pore pressure gradient at 80ºC due to lower viscosity of water.
Description: ARMS7: 7th Asian Rock Mechanics Symposium. The theme of the Symposium is The Present and Future of Rock Engineering. 15-19 October 2012. COEX, Seoul, Korea.
Conference Name: Asian Rock Mechanics Symposium (ARMS)
Conference Sequence: 7
Conference Place: Seoul
Type: proceedings (author version)
URI: http://hdl.handle.net/2115/56180
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤井 義明

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