Application of Close Range Photogrammetry to Monitor Displacements in Open Pit Mines Available to Purchase

: in this study, close range photogrammetry has been evaluated to monitor displacements in open pit mines. A proper displacement monitoring program can provide useful information that can be used in design as well as the ability to predict a failure. Many displacement monitoring techniques are available, however not all are reliable, accurate, and cost effective. Close range photogrammetry (CRP) is a monitoring method with high accuracy, reliability, and cost effectiveness, and ability for measuring places that are inaccessible. In CRP, multiple series of photographs are taken from different positions with different angles at different time intervals. These photos are processed using CRP code and 3D models are constructed. Furthermore, a point cloud with precise coordinates of each point can be obtained. By comparing 3D models, movements of each specific point can be measured. This method has been demonstrated at one of the properties of the Freeport-McMoRan company. In this project, movement rates are determined by comparing different 3D models. These results are then compared to results of other monitoring methods to validate the CRP displacement method. Results evaluate CRP as a reliable method to monitor displacements in open pit mines