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Outline
The observed data show that the BM1-BM3 branch of the Dashuitou cross-fault in the Haiyuan fault zone exhibited a reverse faulting change of 1.52 mm in November 2023, and another sudden reverse faulting jump of 1.71 mm on March 6, 2024. To verify whether this anomaly is related to tectonic movement, we obtain the time series of surface deformation in the Dashuitou cross-fault site by InSAR technology. It analyzes the possible causes of the cross-fault deformation anomaly from the deformation field's spatial distribution and time evolution. The results show that: 1) The coal mining areas around the site have obvious subsidence, and the subsidence rate changes rapidly over time. The cumulative shape variable from January 2023 to June 2024 is about 23 cm, and the significant deformation range is about 1 km2. 2) The benchmark points are significantly affected by mining-induced subsidence, exhibiting varying degrees of settlement over time. The closer they are to the mining area, the greater the subsidence magnitude and the faster the rate. 3) Comparing the results of InSAR and leveling observation, the trend and magnitude of cross-fault deformation in the same period are the same. In summary, the abnormal leveling deformation of the Dashuitou cross-fault site may be caused by the settlement of the mining area.
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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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