| Budget Amount *help |
¥15,600,000 (Direct Cost: ¥12,000,000、Indirect Cost: ¥3,600,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2012: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2011: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
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| Outline of Final Research Achievements |
This study has examined a long-term evolution of permeability in fractured rocks under various stress and temperature conditions. The experimental observations show that the permeability decreases with time and the rate and the magnitude of the changes are more significant at higher temperature, which should result from the geochemical reactions such as mineral dissolution and precipitation. I have developed a numerical model that predicts the long-term evolution of permeability under arbitrary stress and temperature conditions. The predictions agree with the experimental measurements, indicating the validity of the developed model.
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