Full
Outline
In order to accelerate the consolidation of tailings slurry, the influence mechanism of vacuum preloading method based on different drainage channels (sand drains and drainage boards) on the consolidation of bauxite slime was explored. The macroscopic characteristics were analyzed by vane shear tests and consolidation tests. Combined with nuclear magnetic resonance tests, the evolution law of microscopic pore characteristics was revealed. The results show that the moisture content of the slime decreases from 1 80% to 47.88%, the shear strength increases to 26.8 kPa, and the compression modulus reaches 15.5 MPa. The consolidation effect of sand drain is better than that of drainage board, which is mainly due to the fact that sand drain can continuously ensure the transmission of vacuum degree in the process of slime reinforcement. In addition, the pore water in the slime formed after consolidation of different drainage channels has the same distribution laws. The research results can provide theoretical support for accelerating the rapid settlement of tailings slurry.
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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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