Calculation method of step height in open-pit mining area based on UAV image matching point cloud

doi:10.13474/j.cnki.11-2246.2023.0150

Abstract

Abstract: The calculation of step height in open-pit mine is an important part of mine survey and acceptance, which is of great significance to strengthen mine production monitoring and cost management.In view of the problems of the traditional step height measurement method, such as heavy workload, poor efficiency and difficulty in ensuring the safety of surveyors, this paper proposes a step height calculation method considering the stratified structure of slope based on the open pit point cloud obtained by the tilt photography of UAV. In this method, the flat area is eliminated by surface element division, the slope point cloud is processed by density clustering, and the top line and bottom line of the step are obtained by random sampling consistency. Finally, the height of the step is calculated. The experimental results show that it can measure the step height efficiently and accurately in open-pit mine, which has important application value for mining operation and safety.

Key words: slope line extraction, open-pit mines, step height, point cloud processing

CLC Number:

P237

Lü Xinyang, FAN Dongli, ZHANG Guangyun, TAN Ding. Calculation method of step height in open-pit mining area based on UAV image matching point cloud[J]. Bulletin of Surveying and Mapping, 2023, 0(5): 135-139.

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