基于SBAS-InSAR技术的采空区残余变形规律分析
投稿时间:2022-01-28  修订日期:2022-09-21  点此下载全文
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思语 太原理工大学 030024
胡海峰 太原理工大学 矿业工程学院 
基金项目:国家自然科学基金资助项目,52074133,国家自然科学基金委员会,2021.01-2024.12
中文摘要:针对传统测量技术存在观测周期长,人力成本高等局限性,而雷达差分干涉测量技术易受时空失相关、大气相位延迟等的影响,本文采用小基线集技术(SBAS-InSAR)对24景Sentinel-1A影像进行时序处理,探讨了SBAS-InSAR技术的可行性并分析了采空区残余变形的规律。将SBAS处理得到的结果与水准测量获得的累计沉降值进行对比发现,两种方法得到的结果在趋势上完全一致,所有点的平均均方根误差和标准差分别为11.05 ㎜和20.22 ㎜。分析研究区域的沉降情况发现,90209工作面具有的沉降最为明显,累计沉降值最大达到32 ㎜,90208和90207工作面累计沉降值最大达到13 ㎜,90105工作面累计沉降值最大达到8 ㎜,9101工作面沉降值接近于0。90209工作面的下沉速率最大达到88 ㎜/a,90208工作面的下沉速率最大达到59 ㎜/a。提取6个沉降较为明显的点进行时序分析,发现90209工作面内的点的下沉符合二次相关关系,而90208工作面内的点的下沉符合线性关系。研究表明采空区残余变形的沉降速率在逐渐的减小,在开采结束后五年以上,残余变形接近于0,且发生残余变形的区域基本位于采空区内部。通过对比SBAS-InSAR技术和水准测量结果,表明SBAS-InSAR技术在研究矿区残余变形方面具有很好的应用前景。
中文关键词:SBAS-InSAR技术  精度分析  煤矿地区  残余形变
 
Analysis of Residual Deformation in Goaf based on SBAS-InSAR Technology
Abstract:In view of the limitations of traditional measurement technology, such as long observation period and high labor cost, and radar differential interferometry technology is vulnerable to spatio-temporal decorrelation and atmospheric phase delay, this paper uses small baseline set technology (SBASS-InSAR) to process 24 sentinel-1a images, discusses the feasibility of sbas-insar technology, and analyzes the law of residual deformation in goaf. Comparing the results obtained by SBAS with the cumulative settlement value obtained by leveling, it is found that the results obtained by the two methods are completely consistent in trend, and the average root mean square error and standard deviation of all points are 11.05 mm and 20.22 mm respectively. By analyzing the settlement in the study area, it is found that the 90209 working face has the most obvious settlement, with the maximum cumulative settlement of 32 mm, the maximum cumulative settlement of 90208 and 90207 working faces of 13 mm, the maximum cumulative settlement of 90105 working face of 8 mm, and the settlement of 9101 working face close to 0. The maximum subsidence rate of working face 90209 is 88 mm / A, and that of working face 90208 is 59 mm / A. Six points with obvious settlement are extracted for time series analysis. It is found that the settlement of points in 90209 working face conforms to the quadratic correlation, while the settlement of points in 90208 working face conforms to the linear relationship. The research shows that the settlement rate of residual deformation in goaf is gradually decreasing. More than five years after mining, the residual deformation is close to 0, and the area of residual deformation is basically located in the goaf. By comparing the results of sbas-insar technology and leveling, it shows that sbas-insar technology has a good application prospect in the study of residual deformation in mining area.
keywords:SBAS-InSAR technology  accuracy analysis  coal mining area  residual deformation
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