Potential Applications of Hyperspectral Imaging on Weak Rock Degradation Studies in Engineering Geology
Publication: Geo-Congress 2023
ABSTRACT
Rock material characteristics such as mineral composition, fractures, and rock fabric can be closely related to potential stability issues of underground constructions. The composition, durability, and potential swelling are often diagnosed by use of X-ray diffraction (XRD) analysis; however, this method does not recognize non-crystalline rock components and textural properties of weathered and altered rocks. Hyperspectral imaging (HSI) is an emerging technique in lithological and mineral mapping, which utilizes the spectral reflectance signature of the target materials and can be applied both at laboratory and field settings. A pilot study has been conducted to explore the potential of the HSI-based approach using rock chip samples from swelling rocks down to microscopic scale, using the shortwave infrared (SWIR, 1,000–2,500 nm). By comparing the efficiency between HSI and traditional laboratory methods including XRD analysis and petrographic studies, this study provides insights on using new approaches to study weak rock degradation relevant for site characterization and risk management in civil engineering projects.
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Geo-Congress 2023
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Published online: Mar 23, 2023
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