Full
Outline
Slopes containing steeply dipping weak interlayers often fail due to the development of sliding surfaces along the weak interlayer. To address the sensitivity analysis of factors affecting the stability of such slopes, a grey relational-orthogonal test composite algorithm was proposed. The algorithm combines orthogonal test design, range analysis and grey relational method, a slope in an open-pit mine in Yunnan Province was taken as an engineering case for study. The strength reduction method was used to calculate the slope safety factor. An orthogonal test L16(45) with four levels and five factors was designed to analyze the influence of interlayer thickness, interlayer dip angle, distance from interlayer to slope surface, interlayer internal friction angle and interlayer cohesion on the stability of the open-pit slope. The results show that the interlayer dip angle has the most significant influence on slope stability, with its range proportion reaching 51.89%, followed by the internal friction angle of the weak interlayer, with a range proportion of 24.51%, while the other factors have weaker influences. The analysis results of the composite algorithm show a consistent trend with the traditional range analysis results, but the sensitivity ranking is clearer, verifying the reliability of this method. The study suggests that in slope design, the slope angle should be controlled to be smaller than the interlayer dip angle, and the slope stability should be enhanced by increasing the internal friction angle of the weak interlayer. By quantifying the sensitivity weights of key factors, theoretical support is provided for disaster warning, support design and emergency response.
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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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