SGI-based法结合PIM的矿区全盆地下沉量计算方法  

SGI-based method combined with PIM for subsidence calculation of the total basin in mining area

作　　者：王志红 刘吉波 阎跃观[1] 任金铜 舒宇航 WANG ZhiHong;LIU JiBo;YAN YueGuan;REN JinTong;SHU YuHang(School of Geoscience and Surveying and Mapping Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Guizhou University of Engineering Science,Bijie 551700,China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]贵州工程应用技术学院,毕节551700

出　　处：《地球物理学进展》2023年第6期2440-2450,共11页Progress in Geophysics

基　　金：国家自然科学基金项目(51704205);贵州省高层次创新型人才项目(毕科人才合字[2021]09号,毕科联合字G[2019]15号);贵州省教育厅青年成长项目(黔教合KY字[2020]149,[2022]132号);毕节市科技计划联合基金项目(毕科联合字G[2019]15号);毕节市六冲河流域生物保护与生态修复人才团队(毕人领通(2021)12号)联合资助。

摘　　要：获取采区全盆地的地表形变信息,对分析和研究矿区沉降机理具有重要意义.针对InSAR技术在大形变梯度区域失去形变监测能力和PIM无法预计移动盆地边缘下沉量的缺陷,提出了一种SGI-based法结合PIM的矿区全盆地下沉量计算方法.该方法首先使用时序InSAR技术获取采区地表LOS向累积形变信息,再使用SGI-based方法将LOS向形变计算为地表下沉量;对于大形变梯度区域的沉降信息,则由PIM获取;最后,基于距离权重法融合两种方法的下沉量得到全盆地的下沉信息.论文以马泰壕井田为研究区,采用24景Sentinel-1A数据和水准数据对该方法进行了应用和精度分析.结果表明,该方法可精准获取下沉盆地边缘区域的下沉量,监测精度RMSE为9.4 mm,较InSAR和PIM分别提高48%和71%;边缘与加权融合区域的整体监测精度RMSE为32.7 mm,较InSAR和PIM提高68%和48%.Obtaining the surface deformation information of the whole basin in the mining area is of great significance for analyzing and studying the subsidence mechanism of the mining area.Aiming at the defects of InSAR technology losing the ability of deformation monitoring in the area with large deformation gradient and PIM being unable to predict the subsidence at the edge of the subsidence basin,a method for calculating the subsidence of the whole basin in the mining area using SGI-based method combined with PIM is proposed.This method first uses time series InSAR technology to obtain the cumulative deformation information in the LOS direction of the mining area and then uses SGI-based method to calculate the surface subsidence from the LOS direction deformation;To the large deformation gradient area,the settlement information is obtained by PIM;Finally,the subsidence information of the whole basin is obtained by fusing the subsidence of the two methods based on distance weight method.In this paper,the Mattaihao mine field was taken as the research area,and 24 Sentinel-1 A data and leveling data were used to apply this method and analyze its accuracy.The results show that this method can accurately obtain the subsidence of the edge area of the subsidence basin,and the monitoring accuracy RMSE is 9.4 mm,which is 48%and 71%higher than that of InSAR and PIM respectively;The overall monitoring accuracy RMSE of the edge and weighted fusion area is 32.7 mm,which is 68%and 48%higher than that of InSAR and PIM.

关 键 词：SGI-based法 PIM 地表下沉 InSAR 

分 类 号：P237[天文地球—摄影测量与遥感]