基于SBAS InSAR的郑州煤炭矿区地表沉降监测及演化规律分析

Analysis of land subsidence monitoring and evolution law of Zhengzhou coal mining area based on SBAS InSAR

地下开采引起的地表沉降引发了一系列安全和环境问题,现有研究多集中在特定矿区或工作面的地表形变监测与分析领域,而对于煤田的整体地表形变监测与时空演化研究较少。使用SBAS InSAR技术对2017年3月-2023年7月郑州煤炭矿区95景Sentinel 1A影像进行处理,获取了矿区地表沉降信息和演化规律并对其进行分析研究。结果表明,郑州煤矿区沉降范围主要分布在登封南部和新密中部,其中最大沉降速率约为120 mm/a,最大累计沉降量达到710 mm,总沉降面积106.6 km^(2),其中以中度和轻度沉降为主,两者占总沉降面积的94.8%;主要开采区的最大累计沉降量随时间的推移呈线性增加;典型开采区地表沉降的空间演化特征表明,沉降区域仍在持续扩张。

Land subsidence caused by underground mining has triggered a series of safety and environmental problems in mining areas.Existing research is mostly focused on the monitoring and analysis of surface deformation in specific mining areas or working faces,while less research has been conducted on monitoring and spatiotemporal evolution of the overall land deformation in the coalfield.In this study,a total of 95 Sentinel 1A images of Zhengzhou coal mining area from March 2017 to July 2023 were processed using SBAS InSAR technology to obtain the information of land subsidence and evolution law.The results showed that the subsidence range of Zhengzhou coal mining area was mainly distributed in the southern part of Dengfeng City and the central part of Xinmi City,in which the maximum subsidence rate was 120 mm per year,the maximum cumulative subsidence was 710 mm,the total subsidence area was 106.6 km^(2),and the mild and moderate subsidence accounted for 94.8%of the total subsidence area;the maximum cumulative subsidence value showed linear increase over time;the spatial evolution of land subsidence in typical mining area showed that the subsidence area was still expanding continuously.