基于SBAS-InSAR技术的华亭煤矿开采沉陷特征分析

基于SBAS-InSAR技术,利用Sentinel-1A的升降轨数据,对华亭煤矿进行地表形变监测,获得研究区各轨道雷达视线向的地表形变结果,发现研究区存在4处沉陷区域,获取每个区域的沉陷影响面积,并对时序沉陷规律进行分析。沉陷中心区域沉陷值累积达到500mm,最大年平均速率约为160mm/a。融合升降轨进一步得到地表垂向形变和东西向形变,并在此基础上分析形变速率的变化特征。发现主要采矿区东西方向上显示水平形变比较对称的分布,垂向形变以下沉为主。研究表明,SBAS-InSAR技术可以有效应用于矿区开采沉陷的识别与监测,而融合升降轨获取地表的垂向和东西向形变,更能说明矿区开采沉陷变化规律。

Based on the SBAS-InSAR technology,deformation monitoring is conducted to the surface of Huating Coal Mine is monitored by using the lifting rail data of Sentinel-1A,and the surface deformation results of each track radar line of sight in the study area are obtained.It is found that there are four subsidence areas in the study area,and the subsidence influence area of each area is obtained,and the time series subsidence law is analyzed.The accumulated subsidence value in the central area of subsidence reaches 500mm,and the maximum annual average rate is about 160mm/a.The vertical deformation and east-west deformation of the surface are further obtained by combining the lifting rail,on the basis of which the change characteristics of deformation rate are analyzed.It is found that the horizontal deformation is symmetrical in the east-west direction of the main mining area,and the vertical deformation is mainly sinking.The study shows that the use of SBASInSAR technology can be effectively applied to the identification and monitoring of mining subsidence,and the integration of lifting rail to obtain the vertical and east-west deformation of the surface can better explain the changing law of mining subsidence in the mining area.