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      • Information Extraction of Rock Mass structure in Complex Bedrock Mountain Area Based on UAV Oblique Photogrammetry

        ( Fengyan Wang ),( Mingyu Zhao ),( Fujun Zhou ),( Kai Zhou ),( Qing Ding ),( Ziming Wang ),( Jianping Chen ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2

        As a new technology developed in recent years, the UAV oblique photogrammetry is of long-distance, non-contact, high-precision and high-density to acquire rapidly 3D spatial data of the object, which has been applied in geological surveying and mapping. Taking the discontinuity information acquisition from Changdu to Linzhi section of Sichuan-Tibet railway in China as an example, 3D model of the survey area is reconstructed by UAV oblique photogrammetry, and the discontinuities are identified and measured in the model by using the 3D mapping system-EPS. Combined with the solution models of discontinuity parameters, the trace length, orientation and opening degree are calculated. Furthermore, the probability distribution of trace length, the dominant grouping of orientation are obtained by probability theory and mathematical statistics. Also, the model display diagram of 3D trace line for long discontinuities, the pole point diagram of orientation, the rose diagram of joint direction and other related maps are drawn by computer graphics so as to describe and cognize the spatial characteristic of complex rock mass structure, which can provide the basic data for stability evaluation of lithological slope and following railway design. The research shows that UAV oblique photogrammetry technology can be applied in discontinuity information extraction of the complex bedrock mountain area compared with the traditional manual measurement, reduces physical input and personal risk, and improve the precision and efficiency of survey, which has a broad application prospects.

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