Warta Geologi, Volume 46, No. 2, August 2020, pp 76-81


Application of UAV photogrammetry for quarry monitoring

Sharan Kumar Nagendran1,2,*, Mohd Ashraf Mohamad Ismail1

1School of Civil Engineering, Universiti Sains Malaysia,
14300 Nibong Tebal, Pulau Pinang, Malaysia
2Centre of Excellence for Engineering & Technology (CREaTE),
Public Works Department (JKR), 78000 Alor Gajah, Melaka, Malaysia
* Corresponding author email address: sharankumar@student.usm.my

Abstract: In quarry production, survey work is necessary to monitor the height of stockpile and quarry’s walls to obey the rules and regulation stated by authority. Conventional method of surveying is by ground-based surveying on these sites to measure the X, Y and Z data. Nevertheless, these approaches are very time consuming and a dangerous undertaking for the staff. Advancement of remote sensing specifically unmanned aerial vehicle (UAV) have become an alternative for surveying work. The use of drone for survey that is remotely piloted is able to replace the traditional method of surveying in quarries. This paper describes the application of drone mapping for quarry monitoring and management of stockpile and slope assessment. Quadcopter was used to acquire the aerial images for stockpile and both aerial and side images for slope assessment. The captured images were processed using a photogrammetry software, Agisoft Photoscan to produce the final output consisting of orthophoto, digital surface model, 3D dense point cloud and 3D model. Based on the output, volume, height and area of stockpile computational were made in the photogrammetry software. The slope stability assessment computation was made using facet extraction to identify the major discontinuity sets for rock slope stability analysis. UAV photogrammetry grants precise approach to provide fast data recovery and time saving for mapping a large quarry area.

Keywords: UAV, photogrammetry, quarry, rock slope

DOI : https://doi.org/10.7186/wg462202006