| Budget Amount *help |
¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
|
|---|
| Outline of Final Research Achievements |
Fracturing is a key technique for energy source industries to create fractures by injecting massive fluid into rock. We examined by numerical simulations why felt earthquakes are triggered by the fracturing. As a result, we found that when injected fluid propagates to raise pore pressure in a preexisting fault even by the MPa order, the raised pressure can generate dynamic slip of fault in area of the km2 order. However, such large dynamic slip of fault requires two conditions that friction coefficient of fault plane decreases with increasing slip velocity, and the fault is subjected to a large shear stress at critical level. The slip velocity dependency of friction coefficient and the stress state can be measured. This means that we can predict the felt earthquake possibility due to fracturing from those measured frictional characteristics and stress values.
|
