基于SBAS-InSAR技术的M宗地采空区遥感解译

Remote sensing interpretation of M parcel goaf based on SBAS-InSAR technology

苇湖梁矿界已楔入乌鲁木齐市,采煤塌陷导致的问题日益突出,严重影响了市区土地空间规划。针对该问题,以苇湖梁矿区为研究区,M宗地采空区位于矿界内,基于2019年1月—2021年5月期间73景Sentinel-1A数据,采用先进的SBAS-InSAR技术对地表形变进行提取、光学影像辅助解译、与工作面叠加进行长时间序列分析。结果表明,M宗地采空区内没有表现出形变,但是在该宗地的东北部即苇湖梁矿区工作面位置,表现出明显的地面塌陷形变,东南部及西南部有轻微形变;提取的形变位置及范围基本与苇湖梁矿区工作面位置吻合,随着时间推移、工作面推进,形变位置及范围随之发生变化;研究区最大形变速率为-0.29 m/a,最大累积形变量为-0.73 m。以上监测结果可以为该地区的煤炭开采、场地稳定性评价以及工程建设提供依据。

The Weihuliang mining sector has wedged into Urumqi City,and the problems caused by coal mining subsidence are increasingly prominent,which seriously affect the urban land space planning.In view of this problem,Weihuliang mining area was taken as the study area,and the goaf of M parcel was located within the mining boundary.Based on 73 Sentinel-1A data from January 2019 to May 2021,advanced SBAS-InSAR technology was used to extract the surface deformation,interpret with the help of optical image,and superposition with the working face for long time series analysis.The results showed that there was no deformation in the goaf of M parcel,but there was obvious ground collapse deformation in the northeast of the parcel,that was,the working face of Weihuliang mining area,and slight deformation in the southeast and southwest.The extracted deformation position and range were basically consistent with the working face position in Weihuliang mining area.As time went on and the working face advanced,the deformation position and range changed accordingly.The maximum deformation rate of the study area was-0.29 m/a,and the maximum cumulative deformation amount was-0.73 m.The above monitoring results can provide a basis for coal mining,site stability evaluation and engineering construction in this area.