2014 Fiscal Year Final Research Report
Mechanism of changing thermally induced hydraulic and mechanical character of rock fracture
| Project/Area Number |
24560607
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | Ehime University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
YASUHARA Hideaki 愛媛大学, 大学院理工学研究科, 准教授 (70432797)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 熱環境 / 岩石フラクチャー / 透水特性 / 力学特性 |
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| Outline of Final Research Achievements |
In the heated water temporary storage system and radioactive waste disposal cavities, the rock mass around the openings will be influenced by complicated thermal behavior induced by high temperature. In this study, thermally-induced mechanical and hydraulic character of rock fracture was examined.
The flow-through experiments on a single fracture in rock were carried out. The fracture aperture and the related permeability monotonically decreased with time. Meanwhile, the sustained loading experiments using the rock that have a single fracture were conducted under controlled temperature and mineral dissolution conditions. From the tests results, it was found that the difference in displacement of the fractured rock samples is very small for all the conditions. However, it was noticeable that displacement under the wet condition was larger than those under the other conditions. The reason for this may be due to mineral dissolution at the asperity contact areas.
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| Free Research Field |
岩盤力学
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