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基于最优PS点获取方法的矿山工业广场沉降监测

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为保障矿山地面和井下工作人员、工业广场周边居民以及运煤系统运行安全,实时监测地表变形情况,提出永久散射体(PS)点的优化获取方法,以提升 PS-合成孔径雷达干涉测量(InSAR)技术在沉降监测中的适用性.首先,选择淮北市郊煤矿工业广场煤柱Ⅱ513 工作面开采沉陷期间2020 年10 月31 日—2022 年8 月22 日共 26 景SAR卫星影像,运用PS-InSAR技术确定最优的PS点目标选取方法;然后,基于该方法获取该工作面回采过程中的开采损害保护区地面沉降速率、累计沉降量;最后,基于地面水准点实测数据验证PS-InSAR监测精度并分析研究区地表及建(构)筑物动态沉降情况.结果表明:相干系数和振幅离差指数双阈值法较适应于研究区沉降监测;研究区内可探测到的最大下沉速率为-26.5 mm/a,最大累计下沉值为-53.7 mm;同时,探测到研究区西北部存在岩溶塌陷地质灾害因素;利用水准数据验证精度,均方根误差(RMSE)仅为 3.8 mm,决定系数达到0.91.
Monitoring of settlement in mining industrial square based on optimal PS point acquisition method
To ensure the safety of the mining ground and underground workers,residents around the industrial square,and the operation of the coal transportation system,real-time monitoring of surface deformation is carried out.An optimized method for acquiring PS points is proposed to enhance the applicability of PS-InSAR technology in settlement monitoring.Firstly,a to total of 26 Sentinel-1A satellite images during the subsidence period of the Industrial Square coal pillar II 513 working face in the Huainan suburban coal mine from October 31,2020,to August 22,2022,were selected.The PS-InSAR technology was used to determine the optimal method for selecting PS point targets.Then,based on this method,the ground subsidence rate and cumulative subsidence of the mining damage protection zone during the mining process of the working face were obtained.Finally,the accuracy of PS-InSAR monitoring was verified based on the measured data of ground leveling points,and the dynamic subsidence of the study area's ground and structures was analyzed.The results show that the dual-threshold method of coherence coefficient and amplitude dispersion index is more suitable for subsidence monitoring in the study area.The maximum detectable subsidence rate in the study area is-26.5 mm/year,and the maximum cumulative subsidence value is-53.7 mm.Additionally,geological hazards related to karst collapse were detected in the northwest of the study area.By using leveling data for accuracy verification,the root mean square error(RMSE)is only 3.8mm,and the coefficient of determination reaches 0.91.

persistent scatterer(PS)interferometry synthetic aperture radar(InSAR)industrial squaresettlement monitoringcoherence coefficientamplitude dispersion index

杨可明、李婷婷、马军、李亚星、江克贵、赵项通

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中国矿业大学(北京) 地球科学与测绘工程学院,北京 100083

淮北矿业股份有限公司 通防地测部,安徽 淮北 235000

永久散射体(PS) 合成孔径雷达干涉测量(InSAR) 工业广场 沉降监测 相干系数 振幅离差指数

国家科技基础资源调查专项淮北矿业股份有限公司委托项目

2022FY1019052023-129

2024

10.16265/j.cnki.issn1003-3033.2024.05.1436

中国安全科学学报
中国职业安全健康协会

中国安全科学学报

CSTPCD北大核心
影响因子：1.548
ISSN：1003-3033
年,卷(期)：2024.34(5)