Refine your search�ソスF     
Report No.
 - 

The Highest potential transmissivities of fractures in fault zones; Reference values based on laboratory and in situ hydro-mechanical experimental data

Ishii, Eiichi   

The transmissivities (T) of fractures can be related to the fracture roughness ($$JRC_{rm 0}$$), initial aperture ($$E_{rm 0}$$), effective normal stress ($$sigma$$'$$_{rm n}$$), and the tensile strength ($$sigma$$'$$_{rm t}$$) of the intact rock, based on the Barton-Bandis model and their data, and the T (or $$E_{rm 0}$$) can increase by shear-induced dilation. Previous studies revealed that the T of fractures in fault zones, detected as flow anomalies by borehole investigations at six sites, uniformly decreases with the increasing effective mean stress normalized to the $$sigma$$'$$_{rm t}$$. If this uniform change in T can be explained by $$sigma$$'$$_{rm n}$$-dependent fracture-normal-displacement following the Baron-Bandis model, the T represents the highest potential T of fractures in fault zones which can increase by shear-induced dilation. To verify this possibility, this study estimated the $$E_{rm 0}$$ of the fractures using the T, $$sigma$$'$$_{rm t}$$, and possible $$JRC$$ and $$sigma$$'$$_{rm n}$$. Then, using this estimated $$E_{rm 0}$$, the changes in T were simulated, varying $$sigma$$'$$_{rm n}$$. The results well reproduced the observed uniform change in T.

Accesses

:

- Accesses

InCites™

:

Percentile:64.58

Category:Engineering, Geological

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.