摘要
大宝山露天矿山矿石堆场具有种类多、品位差异大等特点,人工测量耗时耗力且难度较大。基于这一现状,采用搭载高清单镜头的大疆精灵4RTK小型四旋翼无人机,经过现场踏勘,制定了相对航高100 m,重叠率为80%,测区内布置4个像控点,2个检查点的井字形低空倾斜摄影测量方案。共获取了两期高清影像信息,经过Context Capture软件的空三解算与模型重建,得到了对应的真实三维模型。其中,X方向和Y方向最大误差分别为14.05 cm和8.40 cm,中误差为2.59 cm,精度检验满足比例尺为1∶500的地形图要求。将两期模型导入IData软件,得到了不同时期的矿石储量,并与真实值进行了比对分析,相对误差仅为2.8%,为露天采场供配矿规划工作提供了保障。实践表明,低空无人机倾斜摄影技术在矿石堆场储量计算方面具有可行性。
Dabaoshan open-pit mine ore storage yard has the characteristics of many kinds and different grades,and manual measurement is time-consuming,labor-consuming and difficult.Based on the situation,the DJI Phantom 4RTK small quadrotor UAV with high-definition single lens is adopted,the well-shaped low-altitude tilt photogrammetry scheme with relative altitude of 100 m and overlap rate of 80%has been formulated by field survey,and four image control points and two inspection points are arranged in the survey area.Two phases of high-definition image information are obtained,and the corresponding real 3D model are obtained through space three solution and model reconstruction of Context Capture software.The maximum error of X direction and Y direction are 14.05 cm and 8.40 cm respectively,and the mean square error is 2.59 cm,which showed that accuracy test meet the requirements of 1∶500 topographic map.By importing the two-stage model into IData software,the reserves of ore in different periods are obtained,and compared with the real value,the relative error is only 2.8%,which provides guarantee for the open-pit stope ore supply and distribution work.The practice shows that low-altitude UAV tilt photography technology is feasible in reserve calculation of ore storage yard.
作者
张兵兵
许龙星
周敏
张璞
王菲
ZHANG Bingbing;XU Longxing;ZHOU Min;ZHANG Pu;WANG Fei(Hongda Blasting Engineering Group Co.,Ltd.,Guangzhou 510623,China)
出处
《中国矿业》
2021年第2期80-83,100,共5页
China Mining Magazine
关键词
无人机
航测技术
像控点布置
精度分析
三维模型
储量对比
UAV
aerial survey technology
image control point layout
accuracy analysis
3D model
reserve comparison
