SBAS-InSAR技术在矿区地表沉降监测中的应用

Application of SBAS-InSAR Technique to the Land Subsidence Monitoring in Mining Area

滩地和沙丘地区的矿区地表形变具有复杂性和特殊性,常规监测手段无法获得长期有效的监测结果,传统的雷达差分干涉测量技术(DInSAR)易受时空失相干、大气延迟等因素的影响而降低监测精度。以营盘壕煤矿2101和2201两个工作面为例,采用差分干涉测量短基线集时序分析(Small Baseline Subset-Interferometry SAR,SBAS-InSAR)技术对Sentinel-1A的84轨道的17景数据进行时序分析,获取了矿区2018年9月8日至2019年3月19日的累计沉降量和沉降速率等信息,直观地展现了矿区沉降状况。对研究区监测结果进行点、线、面的分析,发现累积沉降量和时间呈线性关系,新开采的区域的沉降在整个区域沉降中影响最大,较晚开采的区域在矿区沉降中为主要影响因素。

The surface deformation of mining areas in beaches and sand dunes is complicated and specific,and conventional monitoring methods cannot obtain long-term effective monitoring results.The traditional DInSAR techniques are vulnerable to space-time incoherence,atmospheric delay and other factors to reduce monitoring accuracy.Taking the 2101 and 2201 working faces of Yingpanhao coal mine as an example,a small baseline subset-Interferometry SAR technique was applied to process 17 scenes of Sentinel-1A data for orbit 84,and obtained the cumulative subsidence and settlement rate of the mining area from September 8,2018 to March 19,2019,which visually showed the settlement status of the mining area.The point,line,and surface analysis of the monitoring results in the study area revealed that the cumulative subsidence was linearly related to the time,and the later mining area was the main influencing factor in the subsidence of the mining area.