Citation: | ZHANG Yongting, XU Youning, LIANG Wei, WEI Caiyong, LI Qiaomin, YANG Xueru, BAI Jianhong. Technical methods for colliery subsidence disaster monitoring using UAV LiDAR: A case study of the Maliantai colliery, Ningdong coal base, Ningxia[J]. Geological Bulletin of China, 2018, 37(12): 2270-2277. |
Exploring advanced technology of coal-mining subsidence disaster monitoring is an important task to promote the monitoring better. Colliery subsidence disaster monitoring using UAV LiDAR is a new technology of low-flying 3D measurement composed of UAV and LiDAR. In this study, the authors chose the typical subsidence area of Maliantai colliery, Ningdong coal base in Ningxia as the study area, and obtained point cloud data of two time periods in April and August 2017 in the study area based on UAV LiDAR data. The authors obtained the 3D stereogram of colliery subsidence disaster by information extraction and 3D modeling and discovered 3 colliery subsidence disaster areas. Also, using a certain number of existent leveling points and GPS automatic monitoring data, the authors evaluated the accuracy of the model. The results show that the technical methods of colliery subsidence disaster monitoring using UAV LiDAR data meet the requirements of relevant specification. The methods have such features as flexibility, low cost, high efficiency and high precision, and have wide popularization and application value in future.
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Satellite image map of the study area
Flow chart of scanning measurement of airborne LiDAR
Ground subsidence monitoring points and flight route layout map
Distribution of subsidence intensity
3D effect map of the study area
Profile of AB section in the north subsidence area of the study area
Settlement curve of GPS automatic monitoring point in the study area from April to August, 2017