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金属矿山 ›› 2021, Vol. 50 ›› Issue (07): 96-101.

• 采矿工程 • 上一篇    下一篇

基于无人机航测技术的露天矿山采空区精细化验收

张兵兵  许龙星  张  璞  张岗涛   

  1. 宏大爆破工程集团有限责任公司,广东 广州 510623
  • 出版日期:2021-07-15 发布日期:2021-08-06

Fine Acceptance of Open-pit Mine Goaf based on UAV Aerial Survey Technology

ZHANG Bingbing    XU Longxing    ZHANG Pu    ZHANG Gangtao   

  1. Hongda Blasting Engineering Group Co.,Ltd.,Guangzhou 510623,China
  • Online:2021-07-15 Published:2021-08-06

摘要: 传统的露天矿山采空区处理效果验收以经验法为主,从塌落的整体形态进行宏观分析,存在一定的局限性,难以准确判定实际效果。为了更高效地评价采空区处理效果,提出了采用低空无人机航测技术实 现采空区精细化验收,其为非接触性测绘方式,具有安全性好、精度可靠、效率较高等优势。分析了采空区精细化验收的内涵,在大宝山矿北部649 m平台遗留的盲采空区处理阶段进行了应用。采用搭载高清单镜头的 大疆精灵4 RTK小型无人机实现航高100 m的5向倾斜摄影测量,较好地获取了盲采空区爆前和爆后的两期三维模型信息,精度校验满足1∶500地形图制图要求。利用南方IData软件实现盲采空区范围线与三维模型的套 合,计算得到了爆破后的盲采空区充填相对高度增加率为110%~200%。结合多角度航拍影像及实际挖装作业情况,验证了盲采空区得到了有效处理。实践表明:低空无人机航测技术在精细化验收露天矿山采空区处理效 果方面,具有一定的适用性。

关键词: 露天矿山, 盲采空区, 低空无人机航测技术, 三维模型, 精度检校, 充填率, 精细化验收

Abstract: The traditional acceptance of goaf treatment effect in open-pit mine is mainly based on experience method. However,there are some limitations in macroscopic analysis from the overall shape of collapse, so it is difficult to accurately determine the actual effect. In order to evaluate the goaf treatment effect more efficiently, low-altitude UAV aerial survey technology is proposed, which is a non-contact surveying and mapping method, with good safety and reliable precision and high efficiency. The connotation of fine acceptance of goaf is given, which is applied in the treatment stage of blind goaf left by 649 m platform in Dabaoshan Mine. The DJI Phantom 4 RTK small UAV equipped with high-definition single lens was used to realize 5-lens aerial survey with altitude of 100 m. The two-period 3D model information of blind goaf before and after blasting was obtained, and the accuracy verification met the requirements of 1∶500 topographic drawing. The South IData software is used to realize the combination of blind goaf range line and three-dimensional model. The calculation results show that the increase rate of filling relative height is 110%~200% after blasting. Combined with multi-angle aerial images and actual excavation operation, it is verified that the blind goaf is well processed. The practice shows that low-altitude UAV aerial survey technology is feasible in fine acceptance of goaf treatment effect of open-pit mine.

Key words: open-pit mine, blind goaf, low-altitude UAV aerial survey technology, 3D model, accuracy verification, filling rate, fine acceptance