Construction and optimization method of the open-pit mine DEM based on the oblique photogrammetry generated DSM

摘要

The digital surface model (DSM) of open-pit mines generated by oblique photogrammetry has a large amount of data and much interference information. Therefore, it is necessary to construct a 3D model with a small amount of data that can reflect the real terrain of open-pit mines. The model should adapt to the existing 3D mining software and provide a guarantee for the subsequent production planning and open-pit mine design. Taking three different complexity scenes in two open-pit mines with 1:500 mapping scale as experimental objects, we realized the DEM construction of the DSM in different scenarios in open-pit mines. The extraction completeness of mining equipment in the DSM using this method is 94.7%. The data can be compressed to approximately 0.02% of the original data. The accuracy of 210 check points in the model is consistent with the industry standard. The DEM model can be quickly imported into 3D mining software. (C) 2019 Elsevier Ltd. All rights reserved.