Rchr

J-GLOBAL ID：200901065674035716 Update date: Jan. 31, 2024

Obara Yuzo

オバラユウゾウ | Obara Yuzo

Affiliation and department：
Job title：校長

Research field (1)： Geotechnical engineering

Research theme for competitive and other funds (39)：

2015 - 2018 Innovation of rock test combing micro bend test and multiscale fracture analysis
2013 - 2015 Innovation of fracture toughness test for new horizon of rock fracture mechanics
2011 - 2015 Visualization innovation of structure and phenomena in the geo-materials leaded by non-destructive visualization method, X-ray CT method
2008 - 2010 Study on the loosening mechanism of the ground due to aging of sewerage pipes and its countermeasure methods
2006 - 2007 Development of the high performance mechanical tests method of rock materials by means of X-ray CT

2005 - 2006 Development of new tunneling method using X-ray CT

2004 - 2005 Development of the non-destructive geomaterilas testing method by means of X-ray CT

2003 - 2004 Development of design method for support system of cavern using cable bolt

2003 - 2004 Evaluation of three dimensional vertical and lateral bearing capacities of pile foundations using X-ray CT

2002 - 2003 ボアホール孔壁変位計測に基づく新しい岩盤応力測定法の開発

2002 - 2003 Fundamental research for transport-diffusion of contaminants in the basement

2000 - 2001 Monitoring of Rock Slope Stability by the use of high Sensitive Tiltmeter

2000 - 2001 Visualization of thermal fluid flow in rock sample by X-ray Computed Tomography

1998 - 1999 Development of a High-Speed Rock Excavation System using Water Jet

1998 - 1999 Improvement of Nondestructive Structure Imaging for Rock by X-ray Computed Tomography

1997 - 1998 Fundamental study on strength of rock under high water vapor pressure

1996 - 1997 Development of VSP Probe for Inspection of Blast Damaged Zone

1996 - 1997 Construction of Evaluation System for Hydrothermal Resources Using Soil Gas Method

1996 - 1997 THREE DIMENSIONAL VISUALIZATION OF ROCK FRACTURING PROCESS

1995 - 1996 Study on the stability of roof beam consisted of cracked rock

1995 - 1996 Estimation of characteristics of water jets by means of impact force measurement

1994 - 1995 岩石の圧縮破壊過程とそのメカニズムに関する研究

1994 - 1995 Experimental Study on Stress Corrosion and Vacuum Effect of Rocks

1994 - 1994 マルチクラック岩盤の初期応力に関する研究

1993 - 1994 Production of fine grain limestone by means of focusing and rounding water jets

1993 - 1994 Development of Processing System for Composite Images of SPOT and LANDSAT for the Analyzes of Earth Environment and Natural Resources

1993 - 1994 Fundamental study on strength deterioration rate of weathered rocks

1993 - 1993 岩盤の残留応力に関する基礎的研究

1993 - 1993 抽熱岩体の初期応力分布とその自己相似性に関する研究

1992 - 1993 The rapid evaluation system of blast fragmentation in open pit mine.

1991 - 1992 可逆形状記憶合金を用いた岩石破砕器の開発

1991 - 1992 Rock Stress Measurement by Means of Conical-ended Borehole

1991 - 1992 Rock Stress Measurement by Hydraulic Fracturing with Hemispherical-ended Borehole

1990 - 1990 花崗岩体を対象とした岩盤水理モデルに関する研究

1990 - 1990 能動的地熱抽出における岩盤不連続性調査システムに関する研究

1989 - 1990 Study on Long-term Stability of Rock

1988 - 1989 Initial Stress in Underground Rocks

1987 - 1988 Miniaturization of the system and improvement of the accuracy for Hemispherical Ended Borehole Technique

1985 - 1987 Fundamental study on deformabiliy of mine pillar

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Papers (205)：

Taro Sono, Izumi Tanikura, Atsushi Sainoki, Adam Karl Schwartzkopff, Yuzo Obar. Optimization of chipping parameters to mitigate the damage in a concrete substrate using a discontinuum modelling approach. Construction and Building Materials. 2020. 258
Atsushi Sainoki, Duncan Maina, Adam Karl Schwartzkopff, Yuzo Obara, Murat Karakus. Impact of the intermediate stress component in a plastic potential function on rock mass stability around a sequentially excavated large underground cavity. International Journal of Rock Mechanics and Mining Sciences. 2020. 127. 104223-104223
Se-Wook Oh, Gyeong-Jo Min, Se-Woong Park, Min-Seong Kima, Yuzo Obara, Sang-Ho Cho. Anisotropic influence of fracture toughness on loading rate dependency for granitic rocks. Engineering Fracture Mechanics. 2019
Yuzo Obara, Kimiharu Nakamura, Singo Yoshioka, Atsushi Sainoki, Akira Kasai. Crack Front Geometry and Stress Intensity Factor of Semi-circular Bend Specimens with Straight Through and Chevron Notches. Rock Mechanics and Rock Engineering. 2019. 53. 2. 723-738
KATAOKA Minami, OBARA Yuzo, Leona VAVRO, Kamil SOUCEK, Sang-Ho CHO, Sang-Sun JEONG. Effect of Testing Method Type and Specimen Size on Mode I Fracture Toughness of Kimachi Sandstone. Jouranl of MMIJ. 2019. 135. 5. 33-41

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MISC (80)：

Numerical analysis of crack initiation and propagation in granites. 2016. 21. 4p
Formula for Evaluation of Flexural Strength on Bending Test by Use of a Cylinder Typed Specimen. 2016. 4. 7p
M. Kataoka, Y. Obara. Estimation of fracture toughness of different kinds of rocks under water vapor pressure by SCB test. 2013. 129. 7. 425-432
Y. Obara, T. Yozhinaga, T. Shin, M. Kataoka, T. Yokoyma. Applicability of Cross-sectional Borehole Deformation Method (CBDM) to measure rock stress changes through laboratory and in-situ experiment. 2012. 128. 187-194
Y. Obara, T. Shin, T. Yoshinaga. Development of Cross-sectional Borehole Deformation Method (CBDM) for Measurement of Rock Stress Change. 2011. 1267. 20-25

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Books (10)：

Rock Mechanics and Engineering
CRC Press 2017
工学倫理 (応用倫理学の接点)
理工図書 2007
残壁ハンドブック ( 125-129頁)
(社)資源・素材学会 2005
Rock stress (Rock stress )
BALKEMA 2003
X-ray CT for Geomaterials (X-ray CT for Geomaterials )
BALKEMA 2003

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Lectures and oral presentations (35)：

Visualization of Fracture within Rock Specimen in Semi-Circular Bend Test by Means of X-ray CT
(Proc. of The 1st International Workshop on X-ray CT Visualization for Socio-Cultural Engineering & Environmental Materials, X-Earth (IWX) 2010 2010)
東大宇宙線研究所神岡新地下実験室の開削工事について
(平成21年度鉱山現場担当者会議 2010)
初期地圧測定および物理探査の基準化について
(第45回地盤工学会講演会 2010)
初期地圧測定および物理探査の基準化について
(第45回地盤工学会 2010)
X線CTスキャノ撮影によるブリージング現象の可視化
(土木学会第62回年次学術講演会 ((社)土木学会) 2007)

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Works (37)：

コンクリートのはつり処理に関する研究
尾原祐三 2015 - 現在
マルチコプター(ドローン)を用いた露天掘り斜面監視システムの開発
2015 - 現在
岩石の破壊靭性に関する研究
尾原祐三 2013 - 現在
デジタルカメラを用いた簡易型斜面変位計測システムの開発
2009 - 2010
X線CTを用いる岩石非破壊試験法の高度化
2004 - 2006

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Education (2)：

- 1980 Kumamoto University
- 1978 Kumamoto University Faculty of Engineering

Professional career (3)：

工学士 (熊本大学)
工学修士 (熊本大学)
工学博士 (名古屋大学)

Work history (23)：

2020/04 - 現在 Kumamoto Prefectural College of Technology Principal
2018/04 - 2020/03 熊本大学大学院先端科学研究部(工学系) 教授
1997/04 - 2018/03 Kumamoto University Professor
2015/04 - 2017/03 Kumamoto University Vice-Dean of Faculty of Engineering
2013/04 - 2014/03 Kumamoto University

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Committee career (45)：

2018/04 - 2020/03 (社)資源・素材学会副会長
2016/04 - 2018/03 (社)資源・素材学会理事
2013/06 - 2015/05 岩の力学連合会理事長
2009/04 - 2010/03 (社)資源・素材学会九州支部長
2007/06 - 2009/05 岩の力学連合会編集員会委員長

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Awards (11)：

2021/03 - 資源・素材学会学術功績賞
2019/06 - Japanese Soceity of Rock Mechanics Frontier award
2015/10 - Award of Minister of Economy, Trade and Industry
2015/06 - Best Paper at the 13th International ISRM Congress 2015
2013/06 - Japanese Soceity of Rock Mechanics Advanced technology award

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Association Membership(s) (2)：

(社)資源・素材学会 , JAPANESE SOCIETY FOR ROCK MECHANICS

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