Abstract: Combined with the advantages of traditional laneway convergence measure instrument and 3D laser scanning， a method for obtaining and presenting laneway convergence via 3D visualization was proposed. This method utilizes laser scanning point cloud data from laneway to reconstruct shell model by triangulation. The inverse distance weighted interpolation algorithm is then employed to compute the convergence of the laneway periphery. A parabolic nonlinear enhancement algorithm is further developed based on the one-to-one correspondence between the convergence and the color index， in order to highlight the more obvious convergence within the study area. The whole system was developed using VS2010 and HOOPS， which realizes the dynamic visualization of the 3D convergence contour obtained from surface monitoring. The application of the developed system in the Tiedanshan mine clearly and vividly showed the dangerous area and deformation process of laneway which satisfied the engineers′ requirement for direct presentation and real-time visualization of monitoring data.

Key words: surface convergence, deformation monitoring, data analysis, 3D laser scanning, visualization