Application of LiDAR technology for the investigation of rock mass response to blasting

Jonathan D. Aubertin, D. Jean Hutchinson, Mark Diederichs, Jean-Baptiste Dromer

In the proceedings of: GeoOttawa 2017: 70th Canadian Geotechnical Conference; 12th joint with IAH-CNC

Session: Rock Mechanics II

ABSTRACT: Light/Laser Detection and Ranging (LiDAR) tools provide the means for extensive and detailed surface mapping in a matter of minutes. Numerous areas of geotechnical engineering have benefitted from the opportunities provided by LiDAR technology. Rock fragmentation by blasting represents one of the areas that can be enhanced by such modern surveying capabilities. LiDAR mapping is used here to conduct an extensive field investigation program at an underground rock salt mine through the use of single blasthole tests to assess the response of the deposits to blasting events. This article presents a detailed approach to measure geometric characteristics of a crater blast along the length of a borehole from LiDAR surveys. The results involve test surfaces that are mapped before and after the blast at different locations. The scans are combined to provide a detailed three-dimensional perspective of the crater shape and size. Testing artifacts such as secondary cratering and toe effect were identified from the detailed point clouds. Site specific guidelines for assessing single blasthole crater shape and size are discussed in relation to the compiled data.

RÉSUMÉ: façon rapide et précise un maillage cartographique dense et détaillé. De nombreuses sphères de lliées à la géotechnique la qualité des mesures et observations obtenues sur le terrain (i.e. comportement des pourrait profiter grandement des avancées technologiques pour une représentation géométrique tridimensionnelle. Cet article présente un programme expérimental de forages et sautages mené dans une mine souterraine de sel gemme. Un appareil dgéométrique au rayonnement laser (i.e. LiDAR) a été tirs individuels, un nuage de points de mesure à la surface avant et après le sautage. Certains des résultats obtenus pour définir la forme des cratères sont présentés et discutés.

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Cite this article:
Jonathan D. Aubertin; D. Jean Hutchinson; Mark Diederichs; Jean-Baptiste Dromer (2017) Application of LiDAR technology for the investigation of rock mass response to blasting in GEO2017. Ottawa, Ontario: Canadian Geotechnical Society.

@article{geo2017Paper316,author = Jonathan D. Aubertin; D. Jean Hutchinson; Mark Diederichs; Jean-Baptiste Dromer,title = Application of LiDAR technology for the investigation of rock mass response to blasting,year = 2017}