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Outline
A rare earth mining area in Longnan County, Jiangxi Province, is affected by long-term mining operations and complex natural environments, and the slope stability problem is becoming increasingly prominent. Based on field investigation and data analysis, the geological and environmental conditions and slope stability characteristics of the study area were systematically evaluated. Physical and mechanical parameters of rock and soil mass were obtained through drilling, sampling and laboratory tests. Typical slope profile models were established by using Lizheng Geotechnical Software. On this basis, the circular slip method and broken-line slip method were adopted for computational analysis, and the slope stability under natural working conditions and rainstorm working conditions were simulated respectively. The calculation results show that under natural working conditions, the slope safety factor is 1.59, and the slope is in a stable state. Under rainstorm working conditions, the slope safety factor decreases to 0.913, and the slope is in an unstable state. Rainfall conditions significantly reduce the shear strength of soil mass and increase pore water pressure. Rainfall is the key factor triggering slope instability. The research results can provide a scientific basis for the formulation of slope protection measures in mining areas.
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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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