基于SBAS-InSAR升降轨融合的尾矿库地表形变监测  

Monitoring of ground deformation around tailings pond by integrating of ascending and descending path based on SBAS-InSAR

作　　者：王雪丽 王卫红[1,2,3] 王立娟 马松[4] 廖鑫[5] Wang Xueli;Wang Weihong;Wang Lijuan;Ma Song;Liao Xin(School of Environment and Resource,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;Mianyang S&T City Division National Remote Sensing Center of China,Mianyang Sichuan 621010,China;Tianfu Institute of Research and Innovation,Southwest University of Science and Technology,Chengdu Sichuan 611230,China;Sichuan Academy of Safety Science and Technology,Chengdu Sichuan 610041,China;Sichuan Anxin Kechuang Technology Co.,Ltd.,Chengdu Sichuan 610041,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]国家遥感中心绵阳科技城分部,四川绵阳621010 [3]西南科大四川天府新区创新研究院,四川成都611230 [4]四川省安全科学技术研究院,四川成都610041 [5]四川安信科创科技有限公司,四川成都610041

出　　处：《化工矿物与加工》2023年第4期43-48,78,共7页Industrial Minerals & Processing

基　　金：四川省省级科研院所基本科研业务费项目(2019JDKY0028)。

摘　　要：由于不同轨道的SAR数据成像几何不同,难以评定仅用单组SAR数据解得结果的准确性,为提高尾矿库地表形变监测结果的精度,以四川省攀枝花市米易县牛望田尾矿库为研究对象,基于2个轨道(65景升轨、56景降轨)的Sentinel-1A卫星影像,利用差分干涉测量短基线集时序分析技术(SBAS-InSAR)分别对升轨、降轨数据进行处理,然后融合升轨和降轨的数据处理结果,获得升轨、降轨和升降轨融合共3组形变数据,利用GNSS卫星监测结果对3组数据进行验证,结果表明:升降轨融合结果比单轨监测结果精度更高;2019年11月至2021年12月,尾矿库坝体发生了微小形变,坝体累计形变量为-22.77~10.48 mm,形成了一个面积约为111361 m^(2)的沉降区域和一个面积约为38906 m^(2)的抬升区域。后续研究可以通过引入外部数据或采用三轨InSAR数据,分别对尾矿库垂直、东西、南北3个维度的形变进行三维解算,以使监测结果更加准确。As the imaging geometry of SAR data varies with paths,it is difficult to evaluate the accuracy of the results from using only a single group of SAR data.In order to improve the accuracy of results from monitoring the ground deformation around tailings pond by SBAS-InSAR,in this paper Niuwangtian tailings pond in Miyi county,Panzhihua city,Sichuan province was taken as the research object.Based on the Sentinel-1A satellite images with two paths(65 view ascending path and 56 view descending path),SBAS-InSAR technology was used for processing the ascending path images and descending path images respectively,and then the results of ascending and descending path data were integrated.Finally,three sets of deformation data were obtained,namely,ascending path data descending path data and integrated ascending and descending path data.The GNSS satellite monitoring results were employed to verify the three sets of data,it is demonstrated that the results from the integrate of ascending and descending path data represents more accuracy than those from single path.From November 2019 to December 2021,the tailings dam exhibited minor deformation ranging from-22.77 mm to 10.48 mm,resulting in an subsidence area of about 111361 m^(2) and an rose area of about 38906 m^(2).In subsequent studies,by introducing external data or using three-paths based InSAR data,3D calculation was performed on the deformation in directions of vertical,east-west and north-south,so as to make the monitoring results more accurate.

关 键 词：升降轨融合 SBAS-InSAR 尾矿库 地表形变 GNSS卫星监测 

分 类 号：TD325[矿业工程—矿井建设]