Mechanical Behavior and Permeability of Simulated Rock with Single Fracture under Brittle and Ductile Conditions
| Autor: | Sho TAKEYAMA, Kiyotoshi SAKAGUCHI, Noriaki WATANABE, Noriyoshi TSUCHIYA |
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| Jazyk: | English<br />Japanese |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Journal of MMIJ, Vol 135, Iss 3, Pp 25-30 (2019) |
| Druh dokumentu: | article |
| ISSN: | 1881-6118 1884-0450 |
| DOI: | 10.2473/journalofmmij.135.25 |
| Popis: | Gypsum aggregate specimens have been used in the present study, because brittle, semi-brittle and ductile stress-strain behaviors of the specimen can be controlled only with confining stress level at the room temperature. At confining stresses up to 40 MPa, tri-axial compression and fluid flow experiments have been conducted on the intact specimens and single fracture specimens. It has been indicated that stress-strain behavior is independent of existence of fracture. Moreover, permeability of the single fracture specimen is much higher than intact specimen at conditions of brittle, semi-brittle, intermediate state between semi-brittle and ductile and ductile condition. On the other hand, permeability of the single fracture specimen is not so different from that of the intact specimen at conditions of a transitional behavior between semi-brittle and ductile stress-strain behaviors. As for the geothermal reservoir in the semi-brittle and ductile region, it was suggested that the fracture is retained and permeability is maintained when fracturing occurs due to hydraulic crushing or the like. |
| Databáze: | Directory of Open Access Journals |
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