Field Research on Mining Subsidence Based on Terrestrial 3D Laser Scanning Technology and RTK

Based on the discussion of the accuracy of Terrestrial 3D Laser Scanner and RTK,this article proves the feasibility of having these two technologies combined in mining deformation monitoring. Firstly,methods for establishing corresponding short-term surface movement stations,how to arrange these stations and how to observe were introduced. Next,from the point cloud,the dynamic subsidence value for surface points were got,and after that DEM model of settlement basin can be built. According to dynamic parameters acquiring methods,parameters for mining subsidence prediction were eventually obtained. Then,taking the 8256 working face in Yangquhe colliery of Fengfeng coal mine area for example,the predicted parameters and subsidence isoline in this geology and mining condition were acquired.Compared with actual isoline and using parameters, the good effect of this method was proved.This research which successfully combined these two technologies extends the application fields of 3D Laser Scanning Technology and brings new solutions for mining deformation monitoring. In contrast with tradition method, this technique has the advantages of high speed, good flexibility,low cost, more density data,et. al.,and thus is valuable for further application.