Full
Outline
In order to solve the problems of poor dam stability and difficult construction of cover system caused by high water content and low strength of fine tailings, a series of field tests of the vacuum preloading method combined with prefabricated vertical drains to reinforce fine tailings were carried out. The surface settlement, layered settlement, lateral displacement, degree of consolidation and pore water pressure of tailings under different spacing of prefabricated vertical drains were analyzed, and vane shear test and bearing capacity test of tailings were conducted. The research results show that vacuum preloading method can accelerate dewatering of tailings, effectively reduce the water content, then improve the strength and bearing capacity of tailings, and the reinforcement effect of prefabricated vertical drains spacing of 1.0 m is better than that of 1.2 m. As a technology with low cost, good effect, safety and environmental protection, vacuum preloading method has a broad application prospect in in-situ dewatering and reinforce of fine tailings.
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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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