Automatic discontinuity identification of high steep rocky slopes in open pit quarries based on UAV nap-of-the-object photogrammetry
The identification and interpretation of rock discontinuity is of great importance in the stability a-nalysis of high steep rocky slopes in open pit quarries.For high steep rocky slopes,traditional survey meth-ods are inefficient and dangerous,and the 3D realistic modelling of high steep rocky slopes generated by un-manned aerial vehicle(UAV)oblique photogrammetry is of low accuracy and difficult to be automatically interpreted.In this study,we propose a solution for the high-resolution interpretation of rock structure in-formation of high steep rocky slopes based on UAV nap-of-the-object photogrammetry,and select an exam-ple application in the investigation of geologic hazards of the open pit quarry collapse in Changling Moun-tain,Donghu Hi-Tech Development Zone,Wuhan City,China.By using the DJI M300 RTK equipped with the DJI P1 camera to complete oblique photogrammetry and nap-of-the-object photogrammetry work,the high-precision realistic 3D model and high-density 3D point cloud are used to automatically decode the structural information of high steep rocky slopes in open pit quarries through the region growing algo-rithm.The results show that the information extracted from the investigation of rock structure surface by the method of this paper is accurate,the visualization effect is good,and the computational efficiency is high,which can provide the basis for the investigation and prevention of similar slopes of actual geological hazards.
万方数据
维普
