Rock Joint Micro-Scale Surface Roughness Characterisation using Photogrammetry Method | ||
| Journal of Mining and Environment | ||
| مقاله 6، دوره 13، شماره 1، فروردین 2022، صفحه 87-100 اصل مقاله (3.98 M) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22044/jme.2022.11669.2155 | ||
| نویسندگان | ||
| M. Bahaaddini* 1، 2؛ M. Serati3؛ M. H. Khosravi1؛ B. Hebblewhite4 | ||
| 1School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran | ||
| 2Shahid Bahonar University of Kerman, Kerman, Iran | ||
| 3School of Civil Engineering, The University of Queensland, Brisbane, Australia | ||
| 4School of Minerals and Energy Resources Engineering, UNSW Sydney, Sydney, Australia | ||
| چکیده | ||
| A proper understanding of the shear behaviour of rock joints and discontinuities is yet a remaining challenge in the rock engineering research works owing to the difficulties in quantitatively describing the joint surface roughness both at the field and the laboratory scales. Several instruments and techniques have been developed over the years for the surface characterisation of joints at the field- and laboratory-scale investigations, amongst which the application of the photogrammetry methods has obtained a growing popularity. This work evaluates the applicability of the photogrammetry techniques for the characterisation of joint surface topography and texture at micro-scales, which has been largely understudied in the literature. Three tensile joint surfaces are digitized using photogrammetry, and the results are compared with those obtained from laser scans with a high 3D accuracy. A comprehensive statistical analysis is then undertaken on the digitized point clouds in order to assess the performance of photogrammetry in surface characterisation. The results of this work show that the height differences between the resulting point clouds from the two adopted techniques (photogrammetry and 3D laser scanning) follow the normal distribution with the mean values close to zero. The statistical analyses illustrate that the measured joint surfaces using the photogrammetry techniques are in good agreement with the laser scanning data, confirming that photogrammetry is a capable method for characterising the joint surface roughness even at micro-scales. Interestingly, the results obtained further indicate that the accuracy and preciseness of the photogrammetry techniques are independent from the joint roughness coefficient but the camera and configuration parameters remarkably control the performance of the measurement. | ||
| کلیدواژهها | ||
| Joint surface roughness؛ Rock joint؛ Shear behaviour؛ Photogrammetry؛ Laser scanner | ||
| مراجع | ||
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