Monitoring of ground deformation in Liulin district,China using InSAR approaches  

作　　者：Zheyuan Du Linlin Ge Alex Hay-Man Ng Xiaojing Li Liyuan Li 

机构地区：[1]Geoscience and Earth Observing System Group(GEOS),School of Civil and Environmental Engineering,UNSW Australia,Sydney,Australia [2]Department of Surveying Engineering,Guangdong University of Technology,Guangzhou,People’s Republic of China

出　　处：《International Journal of Digital Earth》2018年第3期264-283,共20页国际数字地球学报（英文）

基　　金：This research was supported under Australian Research Council’s Discovery funding scheme[project number DP130101694];JAXA PI investigation project 1419–Automated interferometric analysis of L-band SAR satellite data for operational earthquake and volcano monitoring.

摘　　要：Coalbed methane(CBM)exploration generally refers to a technique that extracts natural gas from coal beds.The development of CBM in Liulin,China,has experienced a significantly growth period during the past two decades.Previous research mainly focused on the coal geological background or CBM technique itself,while time series InSAR(TS-InSAR)technique was conducted in this work to study the potential land deformation induced by CBM extraction from 2003 to 2011.In total,21 ALOS-1 PALSAR images(acquired from 22 December 2006 to 2 January 2011)and 14 ENVISAT ASAR scenes(captured between 29 October 2003 and 7 November 2007)were used.The TS-InSAR outcome revealed that the annual deformation rates were ranging from 15 to−40 mm yr−1 over the study region.Then the time series deformation evolutions were analysed over 8 CBM sites(No.4 coal seam)out of 20,and the subsidence rates between 1.9 and−6.5 mm yr−1 were derived.In addition,the average subsidence rate and standard deviation among these eight measurements were−3.0 and 2.6 mm yr−1 respectively,suggesting that these CBM extraction sites were quite stable and no obvious subsidence had been observed during this eight-year period.

关 键 词：TS-InSAR subsidence measurement CBM 

分 类 号：TG1[金属学及工艺—金属学]