基于SBAS-InSAR技术的地表沉降规律分析—以贵州矿区为例

Journal: Geological and Mineral Surveying and Mapping DOI: 10.12238/gmsm.v7i11.2037

杨子英

瓮福(集团)有限责任公司

Abstract

贵州矿区地形条件复杂,矿体在爆破强扰动开挖后采场稳定性逐渐降低,导致地表发生不同程度沉降和变形,因此开展矿区的整体地表形变监测与时空演化研究至关重要。以贵州某磷矿山为例,利用SBAS-InSAR技术对2020年12月-2023年6月矿山64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:矿体开挖后在采区上方出现了一定范围的沉降盆地,最大沉降速率约为22.3mm/a,最大累积沉降量达到55mm,总沉降面积0.085km2;随着时间推移沉降范围不断向外扩张,最终沉降趋势呈现类椭圆形状。研究成果可为沉降防治提供数据支撑和重要决策依据,为贵州矿区地表移动变形预测提供参考意义。

Keywords

SBAS-InSAR;地表移动;地表形变监测;时空演化;贵州矿区

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