基于DinSAR技术的宁东煤炭基地区域性地表沉降监测  

Monitoring Regional Surface Subsidence of Ningdong Coal Base by DinSAR

作　　者：程霞 王辉 王国瑞 杜灵通[2,3] 魏采用 周峰 CHENG Xia;WANG Hui;WANG Guorui;DU Lingtong;WEI Caiyong;ZHOU Feng(Ningxia Survey and Monitor Institute of Land and Resources,Yinchuan 750002,Ningxia,China;Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China,Ningxia University,Yinchuan 750021,Ningxia,China;School of Ecological and Environment,Ningxia University,Yinchuan 750021,Ningxia,China;Ningxia Institute of Remote Sensing Survey,Yinchuan 750021,Ningxia,China;Ningxia Institute of Geological and Mineral Resources Survey,Yinchuan 750021,Ningxia,China)

机构地区：[1]宁夏回族自治区国土资源调查监测院,宁夏银川750002 [2]宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021 [3]宁夏大学生态环境学院,宁夏银川750021 [4]宁夏回族自治区遥感调查院,宁夏银川750021 [5]宁夏回族自治区矿产地质调查院,宁夏银川750021

出　　处：《西北地质》2023年第6期369-375,共7页Northwestern Geology

基　　金：宁夏地质局财政项目“宁夏生态状况遥感监测与评价”(NXCZ20220203);中国地质调查局项目“秦岭及宁东矿产资源集中开采区地质环境调查”(DD20160336)联合资助。

摘　　要：宁东煤炭基地开发已成为宁夏工业经济发展的重要引擎,而煤炭开采所引起的地表沉降成为该区主要的区域地质环境问题。笔者利用合成孔径雷达差分干涉测量技术(DinSAR)和2015~2019年的5期Sentinel-1A数据,对宁东煤炭基地区域性地表沉降特征进行监测。结果表明,不同区域、不同年份间的沉降特征存在较大差异,其中北部地区整体沉降量较大,年最大沉降量达到了0.13 m,南部整体沉降量较小;2015~2016年沉降量最大,而2016~2017年沉降量最小;2015~2019年沉降量超过0.1 m的区域面积为578 km²,沉降区与煤矿工矿开采活动区一致,主要为煤炭开采引发的地表沉降。其他微量地表沉降,一方面来自雷达影像的相干失真,另一方面与地表其他风沙侵蚀等变形有关。DinSAR技术在大范围监测地表沉降方面具有明显优势,但由于时间基线较长,存在一定的失相干现象。The exploitation of Ningdong coal base has become an important engine for industrial economic development in Ningxia.Surface subsidence,which caused by coal mining has become the main geological environmental problem in the area.This study monitored regional surface subsidence characteristics of Ningdong coal base by utilizing Differential Interferometry Synthetic Aperture Radar(DinSAR)and Sentinel-1A dataset from 2015 to 2019.The results indicated that the characteristics of subsidence vary widely in different regions and years,subsidence in the north is larger than that in the south,which maximum reached 0.13 m.In the past four years,the sub-sidence from 2015 to 2016 is most serious and however its from 2016 to 2017 is lest.During 2015~2019,the area with subsidence value more than 0.1 m were 578 km².The subsidence area is consistent with the mining activity area,which means that the surface subsidence is mainly caused by coal mining.Other slight surface subsidence,on the one hand,could caused by coherent distortion of radar image and be related to the surface deformation such as wind-sand erosion on the other hand.DinSAR technique has distinct advantage in monitoring large-scale land subsidence,but there is a loss of coherent phenomenon due to the long time baseline.

关 键 词：地表沉降 DINSAR 煤炭基地 形变监测 宁东 

分 类 号：P618.11[天文地球—矿床学] P694[天文地球—地质学]