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Estimation of the Mean Trace Length of Discontinuities in an Underground Drift Using Laser Scanning Point Cloud Data

Author

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  • Yigai Xiao

    (State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China
    School of Resources and Safety Engineering, Central South University, Changsha 410083, China
    Sionsteel Maanshan General Institute of Mining Research Co., Ltd., Maanshan 243000, China)

  • Chengye Yang

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Jielin Li

    (State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China
    School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Keping Zhou

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Yun Lin

    (School of Resources and Safety Engineering, Central South University, Changsha 410083, China)

  • Guoquan Sun

    (State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China
    Sionsteel Maanshan General Institute of Mining Research Co., Ltd., Maanshan 243000, China)

Abstract

In the drifts of underground metal mines, the extraction of rock mass discontinuity characteristics from point cloud models generated with laser scanning has become the main approach. However, the exposure of discontinuities is restricted in drifts, and the size of discontinuities cannot be measured directly. Therefore, it is necessary to use a reasonable sampling tool to estimate the mean trace length of the discontinuities that are mapped in the point cloud model. In this paper, a method to estimate the mean trace length of discontinuities using a three-dimensional (3D) model of a drift (3DM) is proposed. Through the point cloud data of a drift obtained using 3D laser scanning, the information on discontinuities in the surrounding rock was extracted; then, the mean trace length was estimated using 3DEC to set sampling windows on the roof and sidewall in the 3DM. By analyzing the difference between the circular sampling window and the rectangular sampling window using simulated cases, the estimation results showed that the mean trace length obtained using circular measuring windows in the 3DM was closer to the true trace length. Finally, the method was used in a practical engineering case in Jianshan Iron Mine, Panzhihua, Sichuan, China.

Suggested Citation

  • Yigai Xiao & Chengye Yang & Jielin Li & Keping Zhou & Yun Lin & Guoquan Sun, 2022. "Estimation of the Mean Trace Length of Discontinuities in an Underground Drift Using Laser Scanning Point Cloud Data," Sustainability, MDPI, vol. 14(23), pages 1-14, November.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:23:p:15650-:d:983140
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