InSAR技术在矿区沉降监测中的应用研究

发布时间：2018-05-19 19:40

本文选题：地表沉降监测 + 时序差分干涉图　；参考：《东华理工大学》2015年硕士论文

【摘要】：我国是矿产资源大国,尤其是煤矿资源,但随着煤矿资源的大量开采,各种生态环境问题也接踵而至。尤其是矿区的地表沉陷带来的负面影响日益突出。因此加强对矿区的沉降监测,获取矿区的沉降信息,预防矿区沉降塌陷显得日益紧迫。合成孔径雷达干涉测量(In SAR,Interferometric Synthetic Aperture Radar)是一种新的空间对地观测手段,其有别于传统监测手段,具有全天候、全天时、高精度(mm级)、连续面状监测等特点,弥补了常规监测方法的缺陷,在矿区沉降监测方面具有广泛前景。获取矿区时序形变图的常规方法主要有小基线集法(SBAS,Small Baseline Subset)以及永久散射体法(PS,Permanent Scatterer)。但这两种方法都需要对雷达差分干涉测量(D-In SAR,Differential Interferometric Synthetic Aperture Radar)数据做繁杂的后期处理才能得到时序沉降结果。本文在克服时空基线过长导致的失相干现象基础之上,运用D-In SAR技术获取矿区每个时间段的沉降量,进行沉降累加得到时序形变图,称该方法为时序差分干涉图法。本文以江西丰城某矿区为例,利用时序差分干涉图法及小基线SBAS法对矿区进行地表沉降监测与分析,证明基于时序差分干涉图法的可行性。主要研究内容如下:(1)系统阐述In SAR、D-In SAR技术的基本原理及数据处理流程;(2)选用覆盖矿区的7景L波段ALOS PALSAR影像,利用本文提出的时序差分干涉图方法提取矿区2007年6月14日至2008年3月17日的时间序列形变图;(3)基于SABS技术对矿区进行地表沉降监测,提取矿区同一时间段的累积形变量和时序形变图,并将实验结果与基于时序差分干涉图法提取出的实验结果做对比分析。
[Abstract]:China is a large country of mineral resources, especially coal mine resources, but with the massive exploitation of coal resources, a variety of ecological and environmental problems have followed. In particular, the negative effects of surface subsidence in mining areas are increasingly prominent. Therefore, it is more and more urgent to strengthen the monitoring of the subsidence of the mining area, to obtain the settlement information of the mining area and to prevent the subsidence of the mining area from collapsing. Synthetic Aperture Radar Interferometric Synthetic Aperture Radar) is a new space-to-earth observation method, which is different from the traditional monitoring method. It has the characteristics of all-weather, high-precision, continuous surface monitoring, etc. It makes up for the defects of conventional monitoring methods, and has a wide prospect in mining subsidence monitoring. The conventional methods for obtaining temporal deformation maps of mining areas are small Baseline subsets with small baselines and permanent scatterers with permanent scatterers. However, both of these two methods require complicated post-processing of D-In SAR differential Interferometric Synthetic Aperture Radar) data in order to obtain the time series settlement results. In this paper, on the basis of overcoming the phenomenon of incoherence caused by excessive spatiotemporal baselines, the subsidence of each time period in mining area is obtained by using D-In SAR technique, and the time series deformation diagram is obtained by sedimentation accumulation. The method is called sequential differential interferogram method. In this paper, a mining area in Fengcheng, Jiangxi Province, is used to monitor and analyze the surface subsidence of the mining area by using the time-series differential interferogram method and the small baseline SBAS method. The feasibility of the method based on the time-series differential interferogram is proved. The main contents of this study are as follows: (1) the basic principle and data processing flow of in SARN D-In SAR technology are described systematically. (2) 7 L band ALOS PALSAR images covering the mining area are selected. The time series deformation map of mining area from June 14, 2007 to March 17, 2008 is extracted by using the time series differential interferogram method proposed in this paper. The surface subsidence monitoring is carried out based on SABS technology. The cumulative shape variables and time series deformation maps of the same time period in the mining area are extracted and the experimental results are compared with those extracted from the time-series differential interferogram method.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.26

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