基于InSAR的矿区沉降中心动态变化监测与分析

Monitoring and Analysis of Dynamic Change of Mining Subsidence Center Based on InSAR

以安徽省颍上县谢桥煤矿为例,采用InSAR技术探测矿区2007~2011年内各时间段的地表形变结果,利用岩床模型模拟矿区的形变场,分析沉降漏斗的发育状态,为区域地面沉降危险性评估提供重要参考依据。InSAR形变结果显示,开采区域内存在多处沉降漏斗,大体呈东西向分布;随着时间的推移,沉降中心不断推移,沉降范围逐渐扩大。结合遥感影像发现,沉降漏斗与塌陷水域的形成在时间上存在一致性,空间分布也存在高度相关性。

Taking the Xieqiao coal mine in Yingshang county of Anhui province as an example,we use the InSAR technique to detect the surface deformation results of the mining area from 2007 to 2011.We use the sill model to simulate the deformation of the mining area and analyze the subsidence funnel.The developmental state provides an important reference for regional land subsidence risk assessment.The results of InSAR deformation show that there are many subsidence funnels in the study area,which are generally distributed in the east-west direction.With the passage of time,the subsidence center continues to move and the range of subsidence gradually expands.Combined with remote sensing images,it is found that the formation of the settlement funnel and the collapsed water area is consistent in time,and the spatial distribution is also highly correlated.