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To investigate the safety and stability of a proposed substation site in Pingdingshan city，Henan province，and avoid potential risks to the substation caused by the subsidence or tilting of the coal mine goaf，PS-InSAR was utilized to study 45 scenes Sentinel-1A data in Pingdingshan City from 2015 to 2022. A comprehensive analysis of the temporal deformation patterns of nine representative positions of the proposed site was performed. An evaluation mechanism for the safety and stability of the surface site of the coal mine goaf was established based on InSAR monitoring，and the evaluation of the site's safety and stability was completed. The research results demonstrate that the proposed fuzzy PS point selection method based on fuzzy sets theory can overcome the disadvantages of low PS point density，effectively increase the available data for analysis，and enhance the accuracy of monitoring results. After correcting the time series deformation of the representative points in the proposed area based on the reference point，it is found that the overall deformation of the proposed site is small and gradually showing a stable trend，with the maximum settlement of 13.05 mm，the maximum settlement velocity of 5.73 mm/a，and the maximum inclination of 0.070 mm/m. The analysis based on the safety and stability evaluation mechanism reveals that the surface displacement of the coal mine goaf is in a stable state，the substation foundation is in a safe state，and the surface settlement has little influence on the proposed substation. Based on the analysis of three evaluation indicators，the safety and stability level of the ground site on the coal mine goaf is classified as high，and it is feasible to build a substation.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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