文献类型：期刊文献

中文题名：高陡边坡岩体结构信息无人机识别与离散元数值模拟

英文题名：IDENTIFICATION OF ROCKMASS DISCONTINUITIES AND 3D DISCRETE ELEMENT MODELING OF HIGH SLOPE BASED ON UNMANNED AERIAL VEHICLE PHOTOGRAMMETRY

作者：沙鹏[1];孔德珩[2];王绍亮[3];伍法权[1]

机构：[1]绍兴文理学院,浙江省岩石力学与地质灾害重点实验室,绍兴312000;[2]同济大学,土木工程学院,上海200092;[3]浙江省工程勘察设计院集团有限公司,宁波315012

年份：2022

卷号：30

期号：5

起止页码：1658

中文期刊名：工程地质学报

外文期刊名：Journal of Engineering Geology

收录：CSTPCD、、CSCD2021_2022、北大核心、CSCD、北大核心2020

基金：第二次青藏高原科学考察研究重大工程扰动灾害及风险专题(资助号:2019QZKK0904);浙江省自然科学基金重点项目(资助号:LHZ21D020001).

语种：中文

中文关键词：岩质高边坡;无人机测量;结构面识别;数值模型;3DEC

外文关键词：High rock slope;Unmanned aerial vehicle(UAV)photogrammetry;Identification of rockmass discontinuities;Numerical modeling;3DEC

中文摘要：岩体结构特征的准确表征对边坡稳定性评价具有重要影响。由于高陡边坡岩体结构的人工编录工作开展困难,结构几何信息往往获取不全面,导致边坡数值模型构建往往不理想。以江西德兴银山铜矿露天边坡为工程背景,采用无人机与运动恢复结构法(SfM)获取边坡岩体点云模型。基于点云数据建立结构面识别和解译算法,自动获取结构面产状、迹长、间距等几何信息。对比人工测量结果,无人机测量与结构面识别能够获取更符合实际的坡面与岩体结构模型。采用非均匀有理B样条(NURBS)曲面重构和“Rhino-Griddle-3DEC”联合建模方法,结合岩体结构统计模型构建离散裂隙网络DFN能够快速建立三维离散元数值模型,从而获得更好的数值模拟计算结果,满足岩质高边坡稳定性评价的需要。

外文摘要：Quantitative characterization of rockmass discontinuities has significant impact on the evaluation of slope stability.Considering the situation of the complex terrain and the difficulty of manual measurement at high and steep rock slope,unsatisfactory slope model construction affects the accuracy of slope stability analysis.This paper presents a field application on Yinshan open-pit copper mine in Dexing,Jiangxi Province.3D point cloud model is first generated based on unmanned aerial vehicle(UAV)photogrammetry integrated with a structure from-motion(SfM)technique.An automatic procedure for discontinuity detection,digital trace mapping and discontinuity parameters is established.The parameters include the orientation,number of sets,trace length,and set spacing.The extracted values are compared with planned manual measurements through scanline method.The results show that the slope shape and the rockmass model obtained by the UAV photogrammetry are more in line with the actual rock slope.The discrete fracture network(DFN)is established based on the statistic model of rockmass.Then a 3D numerical model is quickly built using non-uniform rational B-spline(NURBS)surface reconstruction and a combined modeling method of"Rhino-Griddle-3DEC".And better numerical simulation results are obtained to meet the demands of open pit mine slope stability analysis.