Wang Song, Zhang Luqing, Zhou Jian, et al. 2023. Land subsidence monitoring and geo-hazard development characteristics of Honghui mining area in Gansu Province based on SBAS-InSAR time series analysis[J]. Journal of Engineering Geology, 31(6): 1951-1963. doi: 10.13544/j.cnki.jeg.2021-0550.
    Citation: Wang Song, Zhang Luqing, Zhou Jian, et al. 2023. Land subsidence monitoring and geo-hazard development characteristics of Honghui mining area in Gansu Province based on SBAS-InSAR time series analysis[J]. Journal of Engineering Geology, 31(6): 1951-1963. doi: 10.13544/j.cnki.jeg.2021-0550.

    LAND SUBSIDENCE MONITORING AND GEO-HAZARD DEVELOPMENT CHARACTERISTICS OF HONGHUI MINING AREA IN GANSU PROVINCE BASED ON SBAS-INSAR TIME SERIES ANALYSIS

    • This paper quantitatively describes the development characteristics of large-scale land deformation hazards and monitor the dynamic land deformation degree in Honghui mining area. It obtains the spatial distribution, size and quantity of collapse pits and ground fissures according to the remote sensing interpretation and field investigation. It conducts the time series land deformation monitoring with SBAS-InSAR method by using 32 Sentinel-1A SAR data covering the study area from March 27, 2017 to October 19, 2019. The results show the follows. At the maximum cumulative subsidence of the mining area is 170 mm. The rapid subsidence areas are concentrated on the surfaces of mined-out areas in Honghui coal mine, which are consistent with the spatial distribution of ground fissures. Although a large number of collapse pits and ground fissures are repaired in the environmental restoration and management area, the surface still continues to subside at an average annual rate of 40~50 mm. In addition to the influence of underground coal mining, the slow subsidence of human accumulation area has a significant restitution in rainy season, and can also be related to the excessive exploitation of groundwater. The relevant research results can provide some scientific basis and reference for the village relocation and resettlement, ecological restoration and potential geo-hazard management in Honghui mining area.
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