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Uranium tailings pond is a major safety and environmental hazard, and it is very important to ensure the safety and reliability under all conditions (including extreme disaster condition). Seismic condition is an important extraordinary working condition affecting the safety of uranium tailings ponds. Focused on the renovation project of a uranium tailings pond, the three-dimensional dynamic finite element method is applied to simulate and analyze seismic condition of uranium tailings pond for the first time. HS small model and UBC3D-PLM model constitutive model are selected to simulate and analyze a uranium tailings pond by dynamic finite element method. Seismic wave characteristic parameters and tailings dynamic characteristic parameters are taken into the finite element seismic dynamic simulation calculation, and the extreme conditions of rare earthquake are considered in the calculation, the displacement nephogram, acceleration nephogram, acceleration time history curve, potential liquefaction range and incremental displacement nephogram are obtained. The results show that the displacement of the dam body increases continuously under earthquake action, and the displacements of dam body decrease obviously after the implementation of the renovation project; there is no obvious change in the acceleration response caused by the renovation project; the liquefaction area is mainly distributed in the slope of the filled dam below the rock-filled platform, mainly in shallow layers (depth of about 3~6 m), and the improvement of liquefaction is limited. The stability safety factor of the dam body under rare earthquake increases from 0.975 to 1.061, the security of rare earthquake condition gets fundamental improvement.
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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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