open access

https://hdl.handle.net/2115/58549

Temperature-Confining Pressure Coupling Effects on the Permeability of Three Rock types under Triaxial Compression

英語

2014-05

CRC Press

131-136

2014 ISRM European Rock Mechanics Symposium (EUROCK 2014), May 27-29, 2014, Vigo, Spain.

Triaxial compression tests were carried out at 295K and 353K under confining pressure of 1–15MPa for Shikotsuwelded tuff, Kimachi sandstone and Inada granite.The sampleswere kept for 24 hr consolidation and then axial compression was applied measuring permeability. Permeability decreased monotonously for Shikotsu welded tuff. The permeability decreased first, began to increase before peak load and showed almost constant value in the residual strength state for Kimachi sandstone and Inada granite. Permeability decreased by failure for Shikotsu welded tuff. It increased due to failure under low confining pressures but decreased under high confining pressures for Kimachi sandstone. It increased due to failure for Inada granite. The permeability at 353K was lower than that at 295K for all of the three types of rock. The mechanisms of the permeability decrease are also shown.

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Accepted Manuscript