A method for monitoring surface subsidence in mining areas by ground-based three-dimensional laser scanning without targets

Abstract

The invention relates to a method for monitoring surface subsidence in a mining area by ground three-dimensional laser scanning without a target, which belongs to the technical field of mining subsidence in a mining area, and solves the problems of high field labor intensity, difficulty in target layout, low efficiency and low efficiency in mining subsidence monitoring in the prior art. There is an issue of personal safety risk. The method steps of the present invention include: arranging a ground three-dimensional laser scanner on the working face of the mining area to measure the position of the site; using a three-dimensional laser scanner to scan the working face of the mining area at multiple sites to obtain multi-site cloud data in the same period; preprocessing the point cloud data; using The preprocessed point cloud data of each period establishes the surface DEM; the dynamic subsidence value of the surface during the observation period is obtained by subtracting the multi-phase surface DEM. The invention does not need to deploy targets to monitor the surface subsidence of the mining area, uses the feature points to complete the multi-site cloud data splicing in the same period, and uniformly converts the overall point cloud to the geodetic coordinate system, which simplifies the field operation process, reduces the risk of work, and improves work efficiency.

Description

technical field [0001] The invention relates to the technical field of mining subsidence in mining areas, in particular to a method for monitoring surface subsidence in mining areas by ground three-dimensional laser scanning without a target. Background technique [0002] Three-dimensional laser scanning technology belongs to the surface measurement mode. In recent years, this technology has been widely used in deformation monitoring, geological disaster protection, industrial and building modeling and other fields due to its high efficiency, high precision and non-contact characteristics. Among them, in the field of surface subsidence monitoring It overcomes the shortcomings and deficiencies of the traditional "cross" linear observation station on the main section to monitor surface subsidence. Practice shows that this method can effectively obtain deformation information such as buildings and ground surfaces. [0003] When using 3D laser scanning to collect data on the tar...

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Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a method for ground 3D laser scanning targetless monitoring of surface subsidence in mining areas to solve the problems of high labor intensity, difficulty in target layout and low efficiency in the field of mining subsidence monitoring in existing mining areas. and personal safety risks

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