JISE


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Journal of Information Science and Engineering, Vol. 41 No. 2, pp. 369-384


Temporal and Spatial Evolution of Surface Subsidence in DHS Iron Mine Based on Synthetic Aperture Radar Remote Sensing Monitoring

LI-WEI YUAN1,4, WEI ZHANG2, ZHI-HUA XING2, SU-MIN LI3,4,+
AND CHAO-WEI PENG2
1College of Public Security and Emergency Management
3College of Land and Resources Engineering
Kunming University of Science and Technology
Kunming, Yunnan, 650093 P.R. China
2Yuxi DHS Mining Co., Ltd.
Yuxi, Yunnan, 653100 P.R. China
4Key Laboratory of Geospatial Information Integration and Innovation for Smart Mines
Kunming, Yunnan, 650093 P.R. China
E-mail: lism@kust.edu.cn

Underground mining has long been severely affected by major risk disasters such as the collapse impact of goaf. It causes huge losses to the lives of operators and the safety of enterprise property and seriously restricts the development of the mining economy. It has important practical significance for mine safety supervision and disaster reduction in grasping the overall situation of surface deformation disasters in the goaf, determining the spatial distribution, clarifying its development dynamics, and doing monitoring analysis, early warning, and forecasting. In this paper, the multi-temporal spaceborne synthetic aperture radar interferometric (MT-InSAR) monitoring technology was used to monitor the surface subsidence area caused by underground mining in DHS. This paper traced the formation process of the subsidence area, analyzed the evolution characteristics of the surface with the development of underground mining, provided the basis for the subsidence disaster control through the time series analysis method, and effectively evaluated the rationality of the control scheme. By extracting the MT-InSAR monitoring data of the subsidence area before August 2019, the time course of the subsidence area penetrating the ground surface was judged, and the spatial distribution area of severe subsidence was determined. Time series analysis showed that the average subsidence rate of the overall deformation field in the subsidence area was −80mm/a, with a maximum value of −120mm/a. In the process of filling treatment, MT-InSAR tracking monitoring was carried out. After filling treatment, the settlement rate decreased to −45mm/a, and the expansion trend of the settlement area has almost stopped. The evaluation conclusion that the filling treatment effect is obvious has been drawn. The analysis results show that MT-InSAR monitoring technology has significant advantages in the application of surface subsidence monitoring in mining area, which is obvious in discovering the law of subsidence evolution and ensuring the safety and efficiency of operation. The application of MT-InSAR monitoring technology in mine subsidence area effectively solved the problem of temporal and spatial evolution monitoring of unstable regional deformation and plays an important role in mine subsidence area management, governance planning, governance effect evaluation, risk management, and other aspects.

Keywords: mining subsidence area, deformation monitoring, MT-InSAR, subsidence temporal and spatial evolution, treatment effect evaluation

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