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Crustal Development Engineering Lab
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A lab that applies rock mechanics to support resource development and underground safety.
AboutAbout the lab
Crustal development in support of humanity's sustainable growth.
The Crustal Development Engineering Lab conducts research based on rock mechanics to support the development of energy resources and the safe use of underground space.
The lab also pursues research on environmental protection, such as the safety of radioactive waste disposal and technologies for storing carbon dioxide underground.
Its work is built on laboratory tests using rock samples and measurements in rock masses in the field, combined with theoretical calculations and chemical analysis.
The faculty see themselves as "motivators" and place importance on students taking the lead in their own research.
Key terms
- Rock mass
- A large, continuous body of rock extending underground
- Mineral trapping
- Reacting carbon dioxide with components of rock to lock it away as solid minerals
- Structural integrity
- Whether a structure is free of damage and can be used safely
NewsLab news
A paper by Associate Professor Nara and colleagues was published in Journal of the Society of Materials Science, Japan
Results of an international collaborative study involving Associate Professor Yoshitaka Nara were published in Journal of Geophysical Research
A paper by Associate Professor Nara and colleagues was published in Zairyo
ResearchResearch themes
Drawing on rock mechanics, the lab studies the development of energy resources, ensuring the safety of radioactive waste disposal, environmental protection through underground carbon dioxide storage and mineral trapping, and evaluation of stress in rock masses. It combines laboratory tests, field measurements, chemical analysis, and theoretical calculations.
*Illustrative imageHow the surrounding environment changes the way rock fractures
For underground structures meant for long-term use, such as radioactive waste disposal facilities, the long-term strength of rock is critical. The lab investigates slowly progressing crack growth (subcritical crack growth) in tests with controlled temperature, humidity, and water chemistry.
*Illustrative imageSeismic resistance and maintenance of tunnels
For structures in rock such as tunnels, the lab studies analysis of shaking during earthquakes, the effect of cavities behind tunnel linings on the structure, evaluation of the structural integrity of concrete using lasers, and the realization of tunnels that control groundwater seepage.
MembersFaculty
The members of the Crustal Development Engineering Lab are faculty, and master's and undergraduate students.As of 2025
- Associate ProfessorYoshitaka Nara
- Associate ProfessorNaotoshi Yasuda
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Hohlbohrkern” --Nightflyer 23:51, 27. Jun 2006 (CEST) / CC BY-SA 3.0 (cropped)
- How the surrounding environment changes the way rock fractures: “DRILL HOLE IN RIB, MULTI FRAC - DPLA - 78bb10dd8e3761507a1d7170a3b68d5e” Department of Energy. National Nuclear Security Administration. Sandia National Laboratories. 3/1/2000 / Public domain (cropped)
- Seismic resistance and maintenance of tunnels: “Tooth Rock Tunnel inspection ( )” Oregon Department of Transportation / CC BY 2.0 (cropped)
- Related lab (応用地球物理学): “Seismic Survey Party” Wsx2 / CC BY-SA 3.0 (cropped)
- Related lab (地殻環境工学): “Satellite Image, Pearl River Bridge 19660823” CIA/NRO/USGS / Public domain (cropped)
- Related lab (ジオフロントシステム工学): “Blue Spring Cavern Underground River Tour” Jim Vajda / CC BY 2.0 (cropped)
- Related lab (流体資源エネルギー学): “Liaohe oil field” Yoshi Canopus / CC BY-SA 4.0 (cropped)
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