Full
Outline
To ensure the safe operation of open-pit mines, safety evaluation of their slopes needs to be carried out. A slope of a certain mine was taken as the research object. A numerical calculation model of the slope was established by the finite element method, the distribution laws of slope stress, displacement and plastic zone were analyzed, and the slope safety factor was calculated by multiple quantitative analysis methods. The results show that the maximum slope displacement, plastic zone and minimum safety factor are all close to the third-stage slope. The third-stage slope was taken as the evaluation object. Single index measurement functions were constructed by the unascertained measurement theory, index weights were determined by the entropy weight method, and the distance discriminant method was adopted as the evaluation criterion for slope safety grade. The research results show that the evaluation grade of the slope in an open-pit mine is Grade Ⅱ. The evaluation results are consistent with the numerical simulation results, which verifies that the mine slope is in a relatively stable safety state. After reinforcement and monitoring were carried out on the slope risk areas, no slope accidents occurred during the operation of the open-pit mine, which verifies the reliability and practicability of the unascertained measurement theory-finite element method for slope safety evaluation.
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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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