基于InSAR的矿区地表三维形变场提取方法应用

Application of Three-dimensional Surface Deformation Extraction Method in Mining Areas Based on InSAR

在矿山开采过程中地表沉陷是三维的,而InSAR监测获取的是卫星视线向形变,针对这一问题提出了一种联合开采沉陷知识的单视线向InSAR三维形变提取方法,实现对地表三维形变的提取。通过以矿山开采引起的地表水平移动和倾斜之间的函数关系作为约束条件,构建单视线向三维变形解算模型,将单视线向InSAR技术提取的二维变形信息转化为三维形变场,并使用两景Sentinel-1数据对万年矿某采掘工作面进行了试验验证。结果表明,该方法能够获取采矿区地表三维形变场,模型反演的结果揭示了该区域真实的地表形变特征,对于矿区开采过程中地表形变特征监测、沉陷规律的探索提供了重要的应用价值。

During the mining process,surface subsidence is three-dimensional,while InSAR monitoring only obtains satellite line-of-sight deformation.To solve this problem,a single-line-of-sight InSAR three-dimensional deformation extraction method combining mining subsidence knowledge is proposed to realize the extraction of surface three-dimensional deformation.By taking the functional relationship between the horizontal movement and the tilt of the surface caused by mining as the constraint condition,a single line-of-sight three-dimensional deformation solution model was constructed,and the two-dimensional deformation information extracted by the single-line-of-sight InSAR technology was converted into three-dimensional deformation field.The experimental verification was carried out on a mining face in the Wan-nian mine using two Sentinel-1 data.The results show that this method can obtain the three-dimensional surface deformation field of mining area,and the results of model inversion reveal the real surface deformation characteristics of the region,which provides an important application value for the monitoring of surface deformation characteristics and the exploration of subsidence law in the mining process.