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A Description for Rock Joint Roughness Based on Terrestrial Laser Scanner and Image Analysis.
Yunfeng Ge1, Huiming Tang1, M A M Ez Eldin2
1Faculty of Engineering, China University of Geosciences, Wuhan, Hubei 430074, China.
A new brightness area percentage (BAP) index quantifies rock joint roughness, capturing anisotropy and scale effects. This method accurately estimates roughness, showing wider applicability than existing techniques.
Area of Science:
- Geotechnical Engineering
- Rock Mechanics
- Digital Photogrammetry
Background:
- Rock joint roughness significantly influences rock mass shear behavior.
- Existing roughness characterization methods often overlook anisotropy, scale, and interval effects.
Purpose of the Study:
- To introduce a novel index, brightness area percentage (BAP), for quantifying rock joint roughness.
- To develop a method that integrates anisotropy, scale, and interval effects in roughness assessment.
Main Methods:
- Utilizing synthetic illumination on digital terrain models derived from terrestrial laser scanner (TLS) data.
- Employing image processing to identify brighter planes indicative of shear resistance.
- Comparing the BAP index with existing roughness quantification methods.
Main Results:
- The brightness area percentage (BAP) effectively captures anisotropy, scale, and interval effects in rock joint roughness.
- BAP demonstrated a good correlation with established roughness measurement techniques.
- Case studies confirmed the broader applicability of the BAP index.
Conclusions:
- The brightness area percentage (BAP) offers a comprehensive approach to characterizing rock joint roughness.
- This new index enhances the understanding of shear behavior in rock masses.
- BAP shows significant potential for practical applications in rock engineering.
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