Deformation Measurement of Mine Similar Material Model Based on Multi-intersection Photography

We introduce the theory and application of digital close range photogrammetry in deformation measurement of mine physical model.A ordinary digital SLR camera is employed and multi-intersection photography is used to take images of mine physical model in the project.The photogrammetric bundle adjustment is applied to compute object space coordinates of artificial deformation monitoring target points on the surface of mine model.Then the cumulative displacement of each deformation monitoring target point is calculated based on their object coordinates and the cumulative displacement vector maps are drawn.The accuracy of plane coordinates is better than ±0.20 mm according to measurement results.The displacement field measured is the same as the actual deformation.The measurement result is satisfactory to the requirement of deformation measurement of mine similar material model.