[2H04-08] Geological Environment

[2H08] Fault Reactivation Experiment and Frictional Properties of Mont Terri Rock Laboratory, Switzerland

*Kazuhiro Aoki¹, Kazuyoshi Seshimo¹, Christophe Nussbaum², Yves Guglielmi³, Toshihiko Shimamoto⁵, Toru Sakai⁴, Masao Kametaka⁴, Shengli Ma⁵, Lu Yao⁵ (1. Japan Atomic Energy Agency, 2. Swisstopo, 3. University of California Berkeley, 4. Dia Consultants, 5. Institute of Geology, China Earthquake Administration)

Keywords:friction experiment, fault reactivation experiment, Mont Terri Rock Laboratory

In order to contribute to the Fault Slip experiment, JAEA has performed friction experiment of borehole cores of the measured interval using a rotary-shear low to high-velocity friction apparatus at Institute of Geology, China Earthquake Administration. Friction experiments were done either dry with room humidity or with 30wt% of H₂O, at a normal stress of 1.4 and 4.0 MPa and at low to intermediate slip rates ranging 0.21 microns/s to 2.1mm/s. Cylindrical specimens of Ti-Al-V alloy with 40 mm in diameter were used as rotary and stationary pistons and the alloy pistons exhibit similar behaviors as host rock specimens.