Full
Outline
Aiming at the slope stability challenges of open-pit of Kisanfu Copper-Cobalt Mine (KFM Copper-Cobalt Mine), the slope instability mechanism was studied by multi-method integration and an optimized evaluation model was established to ensure the safe mining and economic benefits of the mine. Based on the engineering geological characteristics of the mining area such as structural development, rock mass strength characteristics and hydrological conditions, a theoretical correlation model linking rock compressive strength with rock mass strength parameters was constructed. Then the failure mechanisms of open-pit mine slope was analyzed, and the calculation method for the most dangerous composite slip surface was optimized by the limit equilibrium method of slope stability. Finally, two typical geological sections were selected as case studies, the deformation and failure process of stope slopes were analyzed by numerical simulation technology. The results are concluded as follows. Firstly, when the tectonic effect is significant, the slope is prone to sliding failure along the inclined rock layer, while when the influence of tectonic effect is small, the main failure is circular arc failure. Secondly, numerical simulation reveals that the upper part of the slope in the mining area is mainly characterized by settlement deformation (69.9 mm and 36.3 mm), the local free surface appears horizontal deformation, and the slope foot area shows strain concentration. Thirdly, the stability coefficient of the stope slope, obtained through both the limit equilibrium method and numerical simulation analysis is between 1.400 and 2.278, which meets the safety reserve requirement of slope 1.20. The research results can provide a scientific basis for slope design and disaster prevention at the KFM Copper-Cobalt Mine, and ensure the safety production demand of mine.
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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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