基于SBAS技术的采动区形变对建筑物的影响监测

Monitoring on Influence of Mining Area Deformation Based on SBAS Technology on Buildings

针对DIn SAR技术易受时空失相关、大气相位延迟等影响的问题,应用小基线集(SBAS)技术对9景ALOS PALSAR数据进行处理,获取了采动区中村庄区域在2007-2011年的累计沉降量。结果表明,在影像获取的时间段内该区域最大下沉值超过800 mm,SBAS监测结果小于600 mm沉降值与水准测量值具有较高的相关性0.98,最大相差19.8 mm;根据测量点的时序沉降分析,应用SBAS技术监测矿区移动盆地边界及建筑物区域地表移动临界倾斜值所在区域是可靠的。

For the problem that DIn SAR technique is easily influenced by loss related of time and space and atmosphere phase delay,Small Baseline Subset Approach（SBAS） method is applied to process 9 pairs of ALOS PALSAR data.The accumulated mine subsidence in village area from 2007 to 2011 were obtained.The results show that the maximum subsidence in the area is more than 800 mm during this period.SBAS processing results have high correlation（0.98） with levelling results when the subsidence is less than 600 mm,and the max difference is 19.8 mm.According to the temple subsidence analysis of measuring points,it is reliable to use SBAS technique to monitor the area of moving basin boundary and the critical slope of buildings.