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采空区地表InSAR形变监测与安全稳定性评价

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为探明河南省平顶山市某变电站拟建场地的安全稳定性,避免采空区地表沉降或倾斜给变电站造成安全隐患,采用永久散射体(PS)合成孔径雷达干涉测量(InSAR)研究平顶山市2015-2022 年间的45 景Sentinel-1A数据,精细化分析拟建场地的 9 个代表位置的时序形变特征,进而建立基于InSAR监测的采空区地表场地安全稳定性评价机制,完成对场地的安全稳定性评价.研究结果表明:基于模糊数据集的模糊PS选点法可克服PS点密度低的弊端,有效增加分析可用数据,提升监测结果的准确性;依据基准点校正拟建区内代表点的时序形变后发现,拟建场地整体形变较小且逐渐呈现趋于稳定的趋势,最大沉降量为 13.05 mm,最大沉降速度为 5.73 mm/a,最大倾斜为0.070 mm/m.基于安全稳定性评价机制分析可知:采空区地表场地移动变形处于稳定状态,变电站地基基础处于安全状态,采空区地表沉降对拟建变电站的影响程度小,综合 3 种评价指标进行分析,采空区地表场地安全稳定性等级为高,具备建设变电站的可行性.
InSAR deformation monitoring and safety and stability evaluation on surface of coal mine goaf
To investigate the safety and stability of a proposed substation site in Pingdingshan city,Henan province,and avoid potential risks to the substation caused by the subsidence or tilting of the coal mine goaf,PS-InSAR was utilized to study 45 scenes Sentinel-1A data in Pingdingshan City from 2015 to 2022.A comprehensive analysis of the temporal deformation patterns of nine representative positions of the proposed site was performed.An evaluation mechanism for the safety and stability of the surface site of the coal mine goaf was established based on InSAR monitoring,and the evaluation of the site's safety and stability was completed.The research results demonstrate that the proposed fuzzy PS point selection method based on fuzzy sets theory can overcome the disadvantages of low PS point density,effectively increase the available data for analysis,and enhance the accuracy of monitoring results.After correcting the time series deformation of the representative points in the proposed area based on the reference point,it is found that the overall deformation of the proposed site is small and gradually showing a stable trend,with the maximum settlement of 13.05 mm,the maximum settlement velocity of 5.73 mm/a,and the maximum inclination of 0.070 mm/m.The analysis based on the safety and stability evaluation mechanism reveals that the surface displacement of the coal mine goaf is in a stable state,the substation foundation is in a safe state,and the surface settlement has little influence on the proposed substation.Based on the analysis of three evaluation indicators,the safety and stability level of the ground site on the coal mine goaf is classified as high,and it is feasible to build a substation.

goafsurface deformationpersistent scatterer(PS)-interferometric synthetic aperture radar(InSAR)deformation monitoringsafety and stability evaluation

董建军、张莹、李昕、梅媛

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辽宁工程技术大学 安全科学与工程学院,辽宁 葫芦岛 125105

辽宁工程技术大学 矿山热动力灾害与防治教育部重点实验室,辽宁 葫芦岛 125105

采空区 地表形变 永久散射体(PS)合成孔径雷达干涉测量(InSAR) 形变监测 安全稳定性评价

国家自然科学基金辽宁省自然科学基金资助

520741482023-MS-313

2024

10.16265/j.cnki.issn1003-3033.2024.01.0148

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(1)
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