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Gold Science and Technology ›› 2023, Vol. 31 ›› Issue (2): 313-322.doi: 10.11872/j.issn.1005-2518.2023.02.158

• Mining Technology and Mine Management • Previous Articles     Next Articles

Application of Three-dimensional Laser Scanning in Extracting Rock Mass Structure Information of Tunnel

Hao ZHANG1,2(),Li QING1(),Shili QIU2,Yongyuan KOU3,Yunlin GUO3,Shengyan XIA3   

  1. 1.Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
    2.Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430064, Hubei, China
    3.No. 2 Mining Area, Jinchuan Group Co. , Ltd. , Jinchang 737102, Gansu, China
  • Received:2022-10-29 Revised:2023-01-06 Online:2023-04-30 Published:2023-04-27
  • Contact: Li QING E-mail:1948865190@qq.com;qingli_km@sohu.com

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Abstract:

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.

Key words: face of rock mass, three-dimensional laser scanning technology, geometric parameters of structural plane, deep tunnel, control points, non-contact measurement

CLC Number: 

  • P585.2

Fig.1

Schematic diagram of dip angle of structural plane（a） and approximate parallel structural plane（b）"

Fig.2

3D surface model construction and structural plane extraction technology of deep roadway"

Fig.3

Main development conditions of structural plane of +650 m level chute chamber"

Fig.4

3D laser scanner"

Fig.5

Geological survey of tunnel structural plane"

Fig.6

Overall diagram of +650 m level roadway obtained after scanning"

Fig.7

Working face and point cloud triangulation of +650 m level chute chamber"

Fig.8

Restoration and corresponding field diagram of working face of +650 m level chute chamber"

Fig.9

Structural plane identification"

Fig.10

Stereographic projection of +650 m level unloading station chamber face"

Table 1

Summary of dominant structural plane groups developed in migmatite stratum in +650 m level unloading station chamber engineering area"

岩组名称主要岩性

中段

水平/m

岩体结构类型间距提取/m优势结构组产状（倾向∠倾角）
第1组第2组第3组
混合岩带花岗岩、角闪岩、大理岩+650层状、层状—碎裂0.61222°∠61°184°∠47°153°∠60°

Fig.11

Structural plane identification of +650 m level unloading station chamber face"

Table 2

Summary of geological measurement of the dominant structural plane group developed in the mixed rock strata in the chamber engineering area of the +650 m level unloading station and the calculation of the occurrence and spacing by the calibration algorithm"

岩组名称主要岩性岩体结构类型间距测量/m优势结构组产状（倾向∠倾角）近似平行结构面组间距/m利用最小二乘法计算产状（倾向∠倾角）
第1组第2组第3组第1组第2组第3组
混合岩带花岗岩、角闪岩、大理岩层状、层状—碎裂0.58220°∠67°180°∠45°158°∠66°0.62217°∠67°182°∠44°151°∠65°

Table 3

Comparison of difference between the extraction of the dominant structural plane group developed in the mixed rock strata in the chamber engineering area of the +650 m level unloading station and the geological survey results and attitude difference calculated by the calibration algorithm"

岩组名称主要岩性岩体结构类型提取间距与地测间距差值/m优势结构面组提取与地测结果差值提取间距与校核算法间距差值/m优势结构面组提取与利用校核算法计算产状差值
第1组第2组第1组第1组第2组第3组
混合岩带花岗岩、角闪岩、大理岩

层状、层

状—碎裂

0.03倾向之差2°，倾角之差6°倾向之差4°，倾角之差2°倾向之差5°，倾角之差6°0.01倾向之差5°，倾角之差6°倾向之差2°，倾角之差3°倾向之差2°，倾角之差5°
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[1] Jielin LI,Chengye YANG,Chaozhi PENG,Keping ZHOU,Ruikai LIU. Application of 3D Laser Scanning Technology to Identification of Rock Mass Structural Plane in Roadway of Underground Mine [J]. Gold Science and Technology, 2021, 29(2): 236-244.
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