基于合成孔径雷达干涉测量的高速铁路下伏老采空区稳定性监测分析

揭示老采空区现有变形规律是老采空区的稳定性分析的关键,而合成孔径雷达干涉测量(interferometric synthetic aperture radar,InSAR)技术对于广域地表变形监测有着传统测量技术无法比拟的优势.针对贵南高铁穿越大盘井采煤沉陷区的地表监测,采用最新的永久散射体对合成孔径雷达干涉测量(pe...

Stability Monitoring Analysis of Old Goaf Area under Sub-high Railway Based on INSAR

Revealing the existing deformation law of the old goaf area is the key to the stability analysis of the old goaf area, and the InSAR technology has an incomparable advantage for the wide-area surface micro-deformation monitoring. Aiming at the surface monitoring of the Guinan high-speed railway crossing the coal mining subsidence area of Dapanjing, the latest PSP-InSAR measurement technology is used to make up for the defects of the traditional two-track method and PS-InSAR algorithm, and the settlement deformation of the old goaf area is obtained. In addition, the InSAR measurement results were verified by field inspections of existing buildings and roads above the old goaf area. The results show that during the period from 2011 to 2013 and from 2014 to 2015, the average annual subsidence rate of most points in the goaf of Dapanjing was -8~4mm/a. The mined-out subsidence area did not cause obvious damage to the ground buildings and roads. Therefore, it is believed that the subsidence of the goaf of Dapanjing coal mine tends to be stable.