Time-Series SBAS Pixel Offset Tracking Method for Monitoring Three-Dimensional Deformation in a Mining Area

Jilei Huang,Yang Bai,Shaogang Lei,Kazhong Deng

doi:10.1109/access.2020.3004460

Abstract

The ground surface deformation caused by mining damages the ecological environment and severely hinder economic development in the mining area. The acquisition of three-dimensional ground surface deformation in a mining area helps to improve understanding of the process and mechanism of ground surface deformation caused by mining and helps to prevent and control this type of disaster. In this paper, eleven TerraSAR-X images and five Radarsat-2 images covering the 52304 working face in the Daliuta mining area were used to obtain the time-series line-of-sight (LOS) direction deformation and azimuth direction deformation based on different SAR platforms by application of the small baseline subset (SBAS) pixel offset tracking method. According to the three-dimensional solution principle of multiplatform SAR images and 72 GPS points, the accuracy of deformation in the east-west direction is 0.22 m, while the accuracy in the north-south direction is 0.21 m, with an accuracy of subsidence of 0.34 m.

Highlights

The rapid development of China’s economy is inseparable from the support of energy
A temporal baseline constraint of 150 days and a spatial baseline constraint of 400 meters are appropriate, and 55 pixel-tracking pairs for eleven TerraSAR-X images and 10 pixel-tracking pairs for five Radarsat-2 images are generated, respectively, in order to reveal the time series deformations caused by mining
In this paper, a method of time-series small baseline subset (SBAS) pixel offset tracking based on multi-platform SAR images is proposed to determine the 3D deformation in a mining area

Summary

Introduction

The rapid development of China’s economy is inseparable from the support of energy. Coal consumption will occupy a crucial dominant position in China’s energy structure for a long time. China is both the world’s largest coal consumer and the world’s largest coal producer. China’s statistics show that, in 2018, the raw coal production accounted for 46% of the world’s total, and coal consumption accounted for 59% of China’s domestic energy consumption. Over 96% of China’s coal output comes from underground coal mining [1]. The large-scale extraction of underground coal will cause severe ground subsidence and horizontal displacements, severely disturbing the ground surface ecology and affecting the safety of infrastructure and public utilities [2].

Methods

Results

Conclusion