基于DS-InSAR的彩北矿区形变监测研究

Research on deformation monitoring of Caibei mining area based on DS-InSAR

本溪市是我国辽宁省东部的中心城市,矿产资源储备丰富,是我国重要的老工业矿产园区。长时间的矿产资源开采,会极大程度影响采矿区的地质构造,导致采矿区地面形变现象发生。文章选取本溪市彩北矿区作为研究区域,基于Sentinel-1B影像采用DS-InSAR技术开展地面形变监测。监测结果表明,由于长期矿区开采活动,研究区域在2017年依然存在两处明显的地面沉降,最大地面沉降速率可达-28 mm/a,利用时间维度相干系数进行内校检精度评估,结果显示全部DS点形变精度在3 mm以内。

Benxi City is the central city in the eastern part of Liaoning Province,China.There are a lot of mineral resources in this significant historical industrial mineral park.Long-term mining of mineral resources will seriously affect the geological structure of mining area which leads to occurrence of the land deformation.This paper selects the CaiBei mining area in Benxi City as the research area,and uses DS-InSAR technology to carry out the land deformation monitoring based on Sentinel-1B images.Monitoring results show that due to long-term mining activities in the mining area,there are still two obvious land subsidence phenomena in the research area in 2017,and the maximum land subsidence rate reaching-28 mm/a.Using the time-dimension coherence coefficient for the internal calibration accuracy assessment,the results show that the deformation accuracy of all DS points is within 3 mm.