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| Analysis of gob collapse characteristics in gypsum mine based on InSAR monitoring data—A case study of Pizhou Pingtai and Xizhou mine |
| TANG Zhigang1, JING Jiajun1, YAN Shishun1, PAN Jiubao2, LI Mengmeng2 |
1. The 5th Team, Jiangsu Bureau of Geology and Mineral Resources, Xuzhou 221004, China;
2. Basic Geographic Information Center of Jiangsu Province, Nanjing 210013, China |
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Abstract Gypsum is an important mineral resource. Bulk mining of gypsum will cause serious gob collapse. At present, the research on gob collapse of gypsum mine mainly focuses on the stability of pillars and top layers in the gob area. The research on the surface deformation in gob collapse areas and the monitoring and forecasting methods is rare. What’s more, there is also a lack of effective methods. This article focuses on the study of surface deformation characteristics and collapse characteristics after gypsum mining. The surface deformation characteristics before gob collapse can be obtained from the InSAR monitoring data analysis on ground deformation in the mining area. According to the calculation and analysis of InSAR monitoring data of Pingtai and Xizhou mine from 2007 to 2018, it can be seen that the surface deformed gradually in the early stage before gob collapse. The deformation amount and scale can be used to analyze the gob type and scale. This research can provide data basis and scientific evidence for monitoring, forecasting and preventing ground collapse in gypsum mining area.
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Received: 12 September 2019
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2020, Vol. 7 
