Research on Subsidence Monitoring of Mine Surface Using Digital Close-range Photogrammetric Technique
数字近景摄影测量技术在矿山地表沉陷监测中的应用研究

Conventional geodetic monitoring methods have some disadvantages such as intense workload,difficulties of realizing real-time monitoring and acquiring instant 3D moving deformation information in subsidence areas of mine surface.In order to cope with the practical problem,we proposed a method using digital close-range photogrammetric technique to monitor subsidence areas.First,digital stereo pairs of mine surface were captured using high resolution digital camera.And then digital elevation model(DEM) was extracted by a series of photogrammetric reduction processes such as relative orientation,image matching etc.By comparing the constructed DEM with the original,the subsidence parameters such as subsidence range,depth and volume etc can be calculated.Practical research results indicated that the precision acquired by digital close-range photogrammetric technique can meet the accuracy requirement under this test condition.A feasible approach is provided for subsidence monitoring of mine surface.