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http://dx.doi.org/10.7474/TUS.2022.32.6.451

Fabrication of Three-Dimensional Scanning System for Inspection of Mineshaft Using Multichannel Lidar  

Soolo, Kim (Korea Mine Rehabilitation and Mineral Resources Corp.)
Jong-Sung, Choi (Isung Co. Ltd.)
Ho-Goon, Yoon (Isung Co. Ltd.)
Sang-Wook, Kim (Isung Co. Ltd.)
Publication Information
Tunnel and Underground Space / v.32, no.6, 2022 , pp. 451-463 More about this Journal
Abstract
Whenever a mineshaft accidentally collapses, speedy risk assessment is both required and crucial. But onsite safety diagnosis by humans is reportedly difficult considering the additional risk of collapse of the unstable mineshaft. Generally, drones equipped with high-speed lidar sensors can be used for such inspection. However, the drone technology is restrictively applicable at very shallow depth, failing in mineshafts with depths of hundreds of meters because of the limit of wireless communication and turbulence inside the mineshaft. In previous study, a three-dimensional (3D) scanning system with a single channel lidar was fabricated and operated using towed cable in a mineshaft to a depth of 200 m. The rotation and pendulum movement errors of the measuring unit were compensated for by applying the data of inertial measuring unit and comparing the similarity between the scan data of the adjacent depths (Kim et al., 2020). However, the errors grew with scan depth. In this paper, a multi-channel lidar sensor to obtain a continuous cross-sectional image of the mineshaft from a winch system pulled from bottom upward. In this new approach, within overlapped region viewed by the multi-channel lidar, rotation error was compensated for by comparing the similarity between the scan data at the same depth. The fabricated system was applied to scan 0-165 m depth of the mineshaft with 180 m depth. The reconstructed image was depicted in a 3D graph for interpretation.
Keywords
Lidar; 3D scanning system; Safety inspection; Mineshaft;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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