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Sato, Toshinori; Tanno, Takeo; Hikima, Ryoichi; Sanada, Hiroyuki; Kato, Harumi*
Heisei-23 Nendo (2011 Nen) Shigen, Sozai Gakkai Shuki Taikai Koenshu, p.175 - 176, 2011/09
Japan Atomic Energy Agency has been conducting in-situ stress measurements by hydraulic fracturing method to aiming establish a firm scientific basis for safe geological disposal. Hydraulic fracturing method has many results, but including many errors in data as International Rock Mechanics Society suggested. This report describes results compared with the data obtained by ordinary system and that of new type of system.
Hikima, Ryoichi; Sato, Toshinori; Sanada, Hiroyuki; Tanno, Takeo; Hirano, Toru*; Yamashita, Masayuki*; Ishiyama, Koji*
Heisei-23 Nendo (2011 Nen) Shigen, Sozai Gakkai Shuki Taikai Koenshu, p.265 - 266, 2011/09
no abstracts in English
Kubo, Taiki*; Koike, Katsuaki*; Kurihara, Arata*; Matsuoka, Toshiyuki
Heisei-23 Nendo (2011 Nen) Shigen, Sozai Gakkai Shuki Taikai Koenshu, p.369 - 370, 2011/09
no abstracts in English
Ueda, Takahiro*; Igarashi, Toshifumi*; Hokora, Hideyuki*; Sataka, Hiroyuki; Shimada, Tomohiro*
no journal, ,
no abstracts in English
Abe, Jun; Sekine, Kotaro*; Harjo, S.; Ito, Takayoshi*; Arima, Hiroshi; Aizawa, Kazuya
no journal, ,
Strain measurements using neutron diffraction are based on Bragg's law. Tensile or compressive stress causes change in lattice spacing, which results in peak shift of Bragg peak. Strain value can be derived from this peak shift value. Since neutron penetrate materials more than X-rays, the strain inside the material could be obtained nondestructively using neutron diffraction technique. While the stress measurements using diffraction technique has been focused mostly on metals, the application to geological materials was examined. The aim of this study is to develop neutron diffraction technique applicable to the geological materials. In situ strain measurement on specimens under uniaxial compression have been performed at "TAKUMI". Sufficient neutron diffraction patterns could be obtained. This indicates that the strain distribution in rocks is nondestructively measurable using "TAKUMI".