Application of Three-dimensional Laser Scanning in Extracting Rock Mass Structure Information of Tunnel
Received date: 2022-10-29
Revised date: 2023-01-06
Online published: 2023-04-27
In view of the difficulties in collecting structural information of deep high-steep rock mass，the cumbersome data acquisition and the operation of personnel in high-risk environment，the contact measurement method has been unable to meet the requirements of collecting structural information of rock mass.Therefore， the chamber face of +650 m level unloading station of Jinchuan No.2 mine was taken as the research object，the 3D laser scanner was used to obtain its surface point cloud data set，and the point cloud data was denoised and spliced.After processing，the information parameters of rock mass structure were extracted，and the reliability of the data was verified by checking algorithm and geological survey results.The results show that：（1）Through rapid processing of high-precision scanning data，the occurrence information of structural plane can be obtained when the control point is known and the control point is unknown，which reduces the risk of personnel acquiring structural plane information.（2）The least square algorithm was used to calculate the attitude，the approximate parallel structural plane group spacing algorithm was used to calculate the spacing，and the measured structural plane attitude was compared with the extracted structural plane information.It is known that the inclination and inclination errors are within ±6°，and the spacing errors are within ±0.03 m，which verifies the reliability of the extracted data.（3）The method proposed in this paper was applied to the extraction of the occurrence of the structural plane of the chamber face of the +650 m level unloading station in Jinchuan No.2 mine，and the occurrence information of the structural plane is effectively recognized.This research work not only avoids the danger，but also improves the accuracy and efficiency.
Hao ZHANG , Li QING , Shili QIU , Yongyuan KOU , Yunlin GUO , Shengyan XIA . Application of Three-dimensional Laser Scanning in Extracting Rock Mass Structure Information of Tunnel[J]. Gold Science and Technology, 2023 , 31(2) : 313 -322 . DOI: 10.11872/j.issn.1005-2518.2023.02.158
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