Journal: Engineering Heritage Journal (GWK)

3D laser scanning technology has been applied in mining subsidence monitoring to some extents. Based on the existing observation conditions in the experimental area, the laser point cloud data was collected; Then the methods of point cloud data denoising, registration, filtering and subsidence basin extraction were discussed. Finally, the processing results were analyzed and tested. The results show that: (1) The orientation method has better applicability in mining subsidence monitoring based on TLS, and can avoid the error accumulation caused by the registration method; (2) The error rate of the Irregular Triangulation filtering method with additional constraints on the selection of ground points is 4.22%, which is better than the fitting method; (3) The subsidence basin obtained by TLS has high accuracy, and the mean square error of the difference between TLS and surface subsidence measured by leveling is 3.3 cm.