ANALYSING THE LAW OF DYNAMIC SUBSIDENCE IN MINING AREA BY FUSING INSAR AND LEVELING MEASUREMENTS
- 1School of Geosciences and Info-physics Engineering, Central South University, Changsha, 410083, China
- 2Jiangsu Provincial Key Lab of Resources and Information Engineering, China University of mining and Technology, Xuzhou, 221116, China
Keywords: Dynamic subsidence, Prediction, Feature point lost, InSAR, Leveling, Logistic time function
Abstract. Understanding the law of mining surface dynamic subsidence plays an important role in protecting the villages and other infrastructures against subsidence damage and disturbance. Unfortunately, the existed methods are mostly based on a few sparse leveling measurements, the accuracy and reliability of which are degraded when the feature points of the leveling measurements are lost in the processing of subsidence evolution. This paper presents a method to analysing the law of mining surface dynamic subsidence by fusing interferometric synthetic aperture radar (InSAR) and leveling measurements. By comparing the fitted results obtained by fusing InSAR/leveling and those only by independent leveling, it is shown that the InSAR/levelling fusion not only can make up the deficiency when the leveling measurements lost the feature points of dynamic subsidence, but also can improve the accuracy and reliability of results.