平原地区钻井水溶矿区地表形变D-In SAR监测研究

D-In SAR Monitoring of Ground Surface Deformation in Mines with Solution Mining Method in Plain Area

针对某平原地区钻井水溶矿山地处农业高产示范基地、矿体开采深度小、开采厚度大、地表形变监测要求准确及时的特点,采用合成孔径雷达差分干涉测量(D-In SAR)技术计算地表形变值,并估算数据质量。将获取的地表形变图与数据质量估算结果导入Arc GIS,计算地表形变值,分析矿区形变趋势,以及形变值与监测精度的相关性规律。结果表明,D-In SAR监测对平原地区钻井水溶矿区具有较强适用性:Goldstein滤波是去除平原地区钻井水溶开采矿山地表形变D-In SAR监测相位噪声的有效方法;钻井水溶矿区地表形变趋势与开采推进进度一致,地表沉降呈正态分布规律,盆地近似碗状;监测精度与形变大小具有负相关性,地表形变越小,干涉相干性系数越大,监测精度越高。

In view of the shallow depth and high thickness of ore mass to be mined in one mine with solution mining method that is located in an agricultural high-production demonstration base in plain area, the accuracy and timeliness need to be ensured in the surface deformation monitoring. The differential interferomewy synthetic： aperture radar （D-In SAR） technique was used to calculate surface deformation values and assess data quality. The obtained surface deformation maps and data quality assessment results were then imported into Art： GIS for calculation of the surface detformation values, analysis of the detbrmation trend in the mining area, as well as determination of the eorrelation between deformation values and monitoring accuracy. Results show that monitoring with D-In SAR technique is highly applicable to mines with solution mining method in plain area. Gohtstein filtering method is effeetive to remove phase noise from surface deformation D-In SAR monitoring in mines with solution mining method in plain area, and the trend in the surfaee deformation for the mines with solution mining is consistent with the progress in the mining advancement, and the surface subsidence follows a nomml distribution, with an approximately U-shaped basin. There shows a negative correlation between the monitoring accuracy and the deformation, indicating the smaller the surface deformation, the larger the interferometrie coefficient, and the higher the monitoring accuracy.