无人机摄影测量边坡结构面及块体稳定分析

为提高边坡结构面信息获取过程的安全性及测量结果的准确性，采用无人机多角度摄影测量获取结构面信息，得边坡结构面坐标以及出露迹线长.利用动态控制的相容Delaunay三角剖分对模型进行三角网格化，结合块体生成规则对边坡临空面出露块体进行稳定性分析，识别坡面出露关键块体，并利用GeoSMA-3D系统验证方法的可行性及精度.研究结果表明:点云切割最大关键块体为38.5748m³，GeoSMA-3D切割最大关键块体为38.5617m³，位置均在坡体中央位置，拟合效果良好.对于不规则碎裂岩质边坡，三维点云切割可以更好地表征边坡的块体位置，对于指导关键块体治理具有一定优势.

Slope Structural Plane Measurement and Block Stability Analysis Based on UAV Photogrammetry

In order to improve the safety of the information acquisition process of the slope structural plane and the accuracy of the measurement results， the multi-angle photogrammetry of the unmanned aerial vehicle(UAV) is used to obtain the structural plane information， and the coordinates of the slope structural plane and the length of the exposure are obtained. A dynamic Delaunay triangulation is proposed to triangulate the model. The stability analysis of the exposed surface of the slope is carried out in combination with the block generation rule. The key block is identified on the slope and the GeoSMA-3D is used to verify the feasibility and accuracy. The results show that the maximum key block of point cloud cutting is 38.5748m³， and the maximum key block of GeoSMA-3D cutting is 38.5617m³. Meanwhile， the blocks are both in the center of the slope. For irregular fractured rock slopes， 3D point cloud cutting can better characterize the block position of 3D slopes， and it has certain advantages for guiding key block management.