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Proceedings Papers

Carbon Dioxide (CO 2 ) Fracturing of Volcanic Rocks Under Geothermal Conditions

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Kohei Takuma, Yuto Watanabe, Kiyotoshi Sakaguchi, Noriaki Watanabe, Kazumi Osato, Amane Terai
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-037
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View Paper titled, Carbon Dioxide (CO 2 ) Fracturing of Volcanic Rocks Under Geothermal Conditions
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Proceedings Papers

Size Effect and Correlation with Hardness of the Microscopic Fracture Toughness of the Minerals of Granite

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Kiyotoshi Sakaguchi, Yuta Shirosawa
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-404
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View Paper titled, Size Effect and Correlation with Hardness of the Microscopic Fracture Toughness of the Minerals of Granite
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Proceedings Papers

Water-Assisted CO 2 Fracturing of Volcanic Rocks Under Geothermal Conditions

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Kohei Takuma, Yuto Watanabe, Kiyotoshi Sakaguchi, Jiajie Wang, Kazumi Osato, Amane Terai, Noriaki Watanabe
Paper presented at the SPWLA 28th Formation Evaluation Symposium of Japan, September 13–14, 2023
Paper Number: SPWLA-JFES-2023-B
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View Paper titled, Water-Assisted CO 2 Fracturing of Volcanic Rocks Under Geothermal Conditions
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Proceedings Papers

Flow-Induced Microfracturing of Granite in Conventional and Superhot Geothermal Environments

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Ryota Goto, Eko Pramudyo, Noriaki Watanabe, Kiyotoshi Sakaguchi, Youqing Chen, Takeshi Komai
Paper presented at the SPWLA 26th Formation Evaluation Symposium of Japan, September 30–October 7, 2021
Paper Number: SPWLA-JFES-2021-K
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View Paper titled, Flow-Induced Microfracturing of Granite in Conventional and Superhot Geothermal Environments
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Proceedings Papers

Fracture and Permeability of Granite in Superhot Geothermal Environments

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Noriaki Watanabe, Kiyotoshi Sakaguchi, Hanae Saishu, Ryota Goto, Takuya Ishibashi, Atsushi Okamoto, Youqing Chen, Steven E. Ingebritsen, Takeshi Komai, Noriyoshi Tsuchiya
Paper presented at the 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, December 1–4, 2019
Paper Number: ISRM-YSRM-2019-004
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View Paper titled, Fracture and Permeability of Granite in Superhot Geothermal Environments
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Proceedings Papers

Supercritical Carbon Dioxide Fracturing of Granite From Conventional to Superhot Geothermal Conditions

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Eko Pramudyo, Noriaki Watanabe, Sho Takeyama, Ryota Goto, Takahiro Miura, Kohki Hattori, Kiyotoshi Sakaguchi, Takeshi Komai
Paper presented at the SPWLA 25th Formation Evaluation Symposium of Japan, September 25–26, 2019
Paper Number: SPWLA-JFES-2019-E
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View Paper titled, Supercritical Carbon Dioxide Fracturing of Granite From Conventional to Superhot Geothermal Conditions
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Proceedings Papers

Injection-induced Slip Characteristics of a Rock Fracture Under High Temperatures

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Sho Takeyama, Hiroki Yamane, Noriaki Watanabe, Kiyotoshi Sakaguchi
Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-086
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View Paper titled, Injection-induced Slip Characteristics of a Rock Fracture Under High Temperatures
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Proceedings Papers

Changes in In-Situ Rock Stress Before and After the Major 2011 Tohoku-Oki Earthquake

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Kiyotoshi Sakaguchi, Tatsuya Yokoyama
Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-098
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View Paper titled, Changes in In-Situ Rock Stress Before and After the Major 2011 Tohoku-Oki Earthquake
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Proceedings Papers

Re-Opening and Shut-in Behaviors under a Large Ratio of Principal Stresses in a Hydraulic Fracturing Test

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Tatsuya Yokoyama, Kiyotoshi Sakaguchi, Takatoshi Ito
Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-109
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View Paper titled, Re-Opening and Shut-in Behaviors under a Large Ratio of Principal Stresses in a Hydraulic Fracturing Test
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Proceedings Papers

Application and Integrated Evaluation of the Compact Conical-Ended Borehole Overcoring Technique in a Fractured Rock

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Toshinori Nayuki, Tatsuya Tanaka, Kenichi Ando, Koji Oka, Naoki Nishizaka, Yuichiro Shimoguchi, Hiroshi Ogawa, Kazu Saito, Kiyotoshi Sakaguchi, Masaharu ltamoto
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-056
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View Paper titled, Application and Integrated Evaluation of the Compact Conical-Ended Borehole Overcoring Technique in a Fractured Rock
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Proceedings Papers

Periodic Measurement of In-Situ Rock Stress at Shallow Depth in the Vicinity of the Epicenter Before and After the 2011 Tohoku-Oki Earthquake

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Kiyotoshi Sakaguchi, Motoki Egawa, Tatsuya Yokoyama
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-048
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View Paper titled, Periodic Measurement of In-Situ Rock Stress at Shallow Depth in the Vicinity of the Epicenter Before and After the 2011 Tohoku-Oki Earthquake
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Proceedings Papers

Poroelastic Parameters of Sandstone Under Various Combinations of Pore Pressure and Confining Pressure

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Yuto Usui, Noriaki Watanabe, Akihisa Kizaki, Kiyotoshi Sakaguchi
Paper presented at the SPWLA 19th Formation Evaluation Symposium of Japan, September 26–27, 2013
Paper Number: SPWLA-JFES-2013-J
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View Paper titled, Poroelastic Parameters of Sandstone Under Various Combinations of Pore Pressure and Confining Pressure
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Proceedings Papers

Numerical Simulation of Water Jet Excavation of Rock using Smoothed Particle Hydrodynamics

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Kiyotoshi Sakaguchi, Yuichi Yumoto, Akihisa Kizaki
Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-095
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View Paper titled, Numerical Simulation of Water Jet Excavation of Rock using Smoothed Particle Hydrodynamics
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Proceedings Papers

Hydraulic Fracturing in Inada Granite and Ogino Tuff with Super Critical Carbon Dioxide

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Akihisa Kizaki, Hiroharu Tanaka, Katsushi Ohashi, Kiyotoshi Sakaguchi, Koji Matsuki
Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-109
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View Paper titled, Hydraulic Fracturing in Inada Granite and Ogino Tuff with Super Critical Carbon Dioxide
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Proceedings Papers

Application of Hemispherical-ended Borehole Technique to Hot Rock

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Yuzo Obara, Katsuhiko Sugawara, Kiyotoshi Sakaguchi, Yoichi Mizuochi
Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-117
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View Paper titled, Application of Hemispherical-ended Borehole Technique to Hot Rock
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