PS-InSAR在沛县矿区地表沉降监测中的应用

Application of PS-InSAR in Pei County Mining Area Surface Subsidence Monitoring

以徐州北部重要煤矿产地沛县为例,采用永久散射体时序分析技术(PS-In SAR)对2007~2011年间的18景ALOS PALSAR影像进行时序分析,反演了该地区这4 a间由于煤矿开采造成的地表形变过程。实验结果表明,(1)实验区域存在两处较大矿区形变,分别为沛城煤矿和孔庄煤矿,其沉降中心区沉降速率分别达到-38 mm/y和-18 mm/y,且与实际矿区的空间分布位置一致;(2)受孔庄煤矿开采的影响,沛县北部的省道321以及县内道路沉降也较为明显,沉降速率为-8 mm/y;(3)其他形变区域中心形变速率为-6^-16 mm/y。

In this paper,taking Pei County mining area located in the north part of Xuzhou as the experimental area,we used PS-InSAR technique to calculate mean ground velocity maps and displacement time series from a large data set of 18 ALOS PALSAR images from 2007 to 2011.The PSInSAR results show that two big mining deformation experiment areas were observed,which are Peicheng coal mine and Kongzhuang coal mine.The center of subsidence rates are-38 mm/y and-18 mm/y respectively,and the mining distribution is quite consistent with the actual mining spatial distribution.Impacted by Kongzhuang coal mine mining,the north of Pei County highway 321 and County road's settlement are also more obvious,and the settlement rate is-8 mm/y.Other regional center strain rate settlement rates are-6--16 mm/y.