InSAR技术在采空区铁路选线中的应用

采空区沉降变形会直接影响铁路工程的建设及运营安全,需要对其变形进行勘察分析并评估影响。通过工程实例,应用InSAR(合成孔径雷达干涉测量)技术结合物探及钻探等手段,对某采空区影响进行综合评价。在收集既有地质资料及矿区资料的基础上,首先采用2007~2011年日本ALOSPALSAR及2016~2018年欧空局Sentinel-1A/1B数据进行InSAR分析,框定了采空区范围并断定其发展趋势;然后,针对影响方案的采空区边界段落采用多道地震映像法及“双管单动”钻探手段,查明了浅层小型空洞及采空回填层的分布。实践证明,该方法通过引入空间信息能够有效的细化工作区域,可减少勘察工作量并降低成本。

Research on the Application of Comprehensive Survey Method in Railway Route Selection in Goaf Based on the InSAR Technology

The settlement and deformation of goaf will directly affect the construction and operation safety of railway,it is necessary to investigate and analyze the deformation and evaluate its influence.In this paper,a project was used to illustrate the way to adopt InSAR(Synthetic Aperture Radar Interferometry)technology combined with geophysical exploration and drilling to comprehensively evaluate the impact of the goaf.Based on the existing geological data and mining data,the data of ALOS-PALSAR in Japan from 2007 to 2011 and Sentinel-1A/1B in ESA from 2016 to 2018 were used for InSAR analysis to determine the scope of goaf and its development trend.Moreover,according to the boundary section of the goaf,the distribution of the shallow small cavities and the goaf backfill layers were found out by using the multi-channel seismic imaging method and the“double pipe single action”drilling method.Results shows that the method can effectively refine the work area by introducing spatial information,and reduce the workload and the cost of survey.