岩土力学 ›› 2018, Vol. 39 ›› Issue (S2): 423-431.doi: 10.16285/j.rsm.2018.1426

• 数值分析 • 上一篇    下一篇

结合InSAR的幂指数Knothe模型参数拟合与评估

陈 磊1,赵学胜1,汤益先2,张 红2   

  1. 1. 中国矿业大学(北京) 地球科学与测绘工程学院,北京 100083;2. 中国科学院数字与地球科学研究所 数字地球重点实验室,北京 100094
  • 收稿日期:2018-08-01 出版日期:2018-12-21 发布日期:2019-01-06
  • 作者简介:陈磊,男,1989年生,博士研究生,主要从事InSAR技术原理及矿区应用方面研究。
  • 基金资助:
    国家自然科学基金项目(No.41671394)

Parameters fitting and evaluation of exponent Knothe model combined with InSAR technique

CHEN Lei1, ZHAO Xue-sheng1, TANG Yi-xian2, ZHANG Hong2   

  1. 1. College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China; 2. Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, CAS, Beijing 100094, China
  • Received:2018-08-01 Online:2018-12-21 Published:2019-01-06
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41671394).

摘要: 针对目前我国矿山开采沉陷监测方法与预计模型中存在的不足,提出一种采用水准与InSAR(合成孔径雷达干涉测量)技术相结合的幂指数Knothe模型参数估算方法,并分析该模型的拟合预测精度。首先选取某矿区工作面作为实验区,收集该工作面的8次水准测量数据与5景雷达影像提取水准点的时序沉降信息,其次分析实验区随开采活动引起的岩层移动变形结果,然后利用两者结合得到的时序沉降信息与单独水准测量数据分别估算幂指数Knothe模型的未知参数,得到2组地表下沉拟合曲线。最后利用该2组曲线估算水准点处的拟合值和预测值,并与实测值进行对比,分析InSAR结果对模型拟合预测精度的影响。结果表明,InSAR测量精度满足实际矿山开采要求,与岩层移动变形结果相符;InSAR测量结果可优化水准点的拟合下沉曲线,显著提高幂指数Knothe模型的拟合预测精度。

关键词: InSAR(合成孔径雷达干涉测量)技术, 幂指数Knothe模型, 岩层移动, 参数估算, 拟合精度, 预测精度

Abstract: In light of the deficiency of the mining-induced subsidence monitoring methods and prediction models at present in China, a method of exponent Knothe model parameters estimation combined leveling with InSAR(interferometric synthetic aperture radar) technique is proposed and the fitting and prediction accuracy of exponent Knothe model is analyzed. Firstly, one workface is selected as the study area, eight leveling measurements and five scenes of radar images are collected to achieve the time series subsidence information in the leveling points. Secondly, the results of rock strata movement deformation caused by mining activities are analyzed. Then, the unknown parameters of exponent Knothe model are estimated and two fitting subsidence curves are constructed by combining leveling with InSAR and only by leveling measurements, respectively. Finally, the two fitting curves are used to estimate the fitting values and prediction values; and the effect of InSAR observations on the fitting and prediction accuracy is analyzed by comparing the fitted and predicted data with the measured data in the leveling points. The results show that the measurement accuracy of InSAR technique meets the actual mining requirements and the ground deformation is consistent with the strata movements. In addition, the fitting subsidence curves can be optimized and the fitting and prediction accuracy of exponent Knothe model is obviously improved combined with InSAR technique in the leveling points.

Key words: InSAR(interferometric synthetic aperture radar) technique, exponent Knothe model, strata movement, parameters estimation, fitting accuracy, prediction accuracy

中图分类号: 

  • TD325
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