Full
Outline
Research on slope deformation mechanism forms the foundation and key to formulating reasonable slope treatment measures. After slope cutting and load reduction combined with micro-pile treatment, a submerged slide zone in an open-pit mine in the Democratic Republic of the Congo experienced renewed deformation during subsequent deeper mining operations. To develop a treatment scheme for this submerged slide zone, field investigations and borehole surveys were conducted within the deformed area. The formation process of the sliding surface in the submerged slide zone was analyzed. Based on the investigation results, the deformation mechanism of the submerged slide zone was analyzed in detail. Ultimately, a treatment scheme centered on comprehensive slope cutting and localized reinforcement, comprising slope cutting and load reduction, large-diameter anti-slide piles, and soil nail walls, was formulated. The research results indicate that the formation of the sliding surface is predicated on geological tectonic processes. Under the disturbance induced by open-pit mining, continuous deformation occurs, and the sliding surface extends progressively downward, potentially coalescing to form an integral sliding surface in the final stage. The formation mechanism of the sliding surface in the submerged slide zone can be divided into three stages: the advancing-type sliding stage induced by unloading rebound, the retrogressive-type sliding stage triggered by excavation at the lower section, and the integral advancing-type sliding stage during later development. Based on the research findings regarding the formation mechanism of the submerged slide zone, a combined treatment measure incorporating slope cutting and load reduction, soil nail walls, and anti-slide piles was formulated. The rationality of the treatment scheme was verified through computational analysis. The research results can provide a reference for the study of treatment measures for similar soft rock slopes in open-pit mines.
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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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