D-InSAR的黄土高原矿区地表形变监测

D-InSAR技术已在数字高程建模、地表微小变形、地壳形变等方面显示出广阔前景,但其对黄土高原矿区复杂、剧烈、动态的地表形变监测能否有效,目前仍存在争议。针对此问题,该文以大同市南郊区采煤沉陷地为研究区域,利用两轨法D-InSAR技术,采用ALOS PALSAR数据获取了研究区域2008年1月1日至2月16日间的沉陷面积和最大沉降值。然后以晋华宫矿某工作面为例,利用开采沉陷预计方法进行验证,预计结果显示该工作面的最大沉陷值与D-InSAR测量值相差达24.04mm,并分析差异主要来源于SAR数据、地形、预计参数选取的限制。实验结果表明,D-InSAR技术能够比较准确且有效地监测黄土高原矿区地表形变。

Surface deformation monitoring of the mining area in Loess Plateau based on D-InSAR

D-InSAR technique has a broad prospect in digital elevation modeling,small surface deformation,and crustal deformation and so on,but little knows if it could be applied to the complex,intense,dynamic surface deformation in the mining area of Loess Plateau.Taking Datong mining area as the research area,using two-pass D-InSAR technique and adopting ALOS PALSAR data,the subsidence acreage and the maximum subsidence from January 1 to February 16,2008 were obtained in this paper.Then a subsidence prediction method was used to validate the D-InSAR monitoring results,showing that the maximum subsidence value of the work face differed by 24.04 mm from that of the D-InSAR measurements as the limitation of SAR data,landform,and parameter of prediction.The results indicated that D-InSAR technique is applicable for the surface deformation monitoring of the mining area in Loess Plateau.