Research on 3-dimensional laser scanner system monitoring the land sliding of the strip mine

摘要

Many high-steep land sliding formed because of long term mining in strip mines. The stability of land sliding directly affected the mine safety, so it is very important to reinforce monitoring and stability analysis. The 3-dimensional laser scanner system has several advantages, including a change of single point data acquisition to automatically continuous and untouched data acquisition, the capability of capturing abundant spatial information, as well as improvement of efficiency and accuracy in measurement. The technology applied the 3-dimensional laser scanner system monitoring land sliding to realize new progress in large area land sliding deformation measurement of the strip mine. The 3-dimensional laser scanner system of CyraX2500 was applied to observe the land sliding deformation of the west region in an open cast mine. With the Cyclone software, the dot cloud data of observation was dealt with. The data processing included the noise data weeding, many sceneries data positing and joining, the joint points error precision evaluating and the DEM model establishing. With the DEM model, the parameters of land sliding profile can obtain accurately. Based on the profile parameters and the rock mechanics parameters, the stability of land sliding was researched by the ANSYS software of finite element method. The monitoring and computing method can forecast the stability of land sliding precisely. The research shows that 3-dimensional laser scanner system can capture high accuracy 3-dimensional data of the land sliding, observe entire model geometric deformation by the untouched method, establish the DEM model of the land sliding, and realize the comparable analysis of land sliding dynamic deformation data in different period of time. The method provides a new technology