The deformation monitoring of shaft is of great significance to mine safety production.Taking the new No.2 auxiliary shaft of Jinchuan Mine as an example,based on the two-period point cloud data obtained by GeoSLAM(mobile three-dimensional laser scanner)in 2020 and 2023,the model slicing method is adopted.The shaft wall deformation of new No.2 auxiliary shaft in 1 280～＜1 340,1 340～＜1 400,1 400～＜1 460 m was analyzed.The results showed that the section size of 1 280～＜1 340 m horizontal shaft decreased on the whole,and the main reason for the deformation was the change of section specifications caused by late repair.At the level of 1 340～＜1 400 m,the section size of the shaft increased locally,and the distribution was obviously zonal in the three-dimen-sional model.However,the overall section size of the shaft decreased,and it was distributed in vari-ous parts of the middle section,mainly due to local deformation caused by ground pressure.On the whole,the 1 400～＜1 460 m horizontal shaft had larger section specifications than the 2020 model section,mainly due to the different design of the construction section.However,the 1 437～1 450 m horizontal shaft section showed obvious section reduction deformation due to local protruding caused by excessive ground pressure.
shaftdeformation monitoringGeoSLAMpoint cloud datathree-dimensional space model
万方数据
