Full
Outline
In order to solve the problems of cumbersome construction process, irreplaceable filter and non-convertible function of extractable liquid in complex sandstone type uranium deposits in the traditional in-situ leaching uranium well configuration (such as large-diameter gravel filling well configuration), a new type of slotted well configuration and its construction technology were proposed. The configuration adopts a one-diameter to the end method, the casing is lowered through the whole hole and the reverse grouting is cemented, and then the industrial ore section is slapped by high-pressure hydraulic sandblasting technology to open up the hydraulic connection channel inside and outside the casing. Through laboratory tests, the key technical parameters of hydraulic sandblasting joints were studied, including the effects of spray pressure, nozzle diameter and moving speed on the depth and width of the joints. The results indicate the optimal slotted performance is achieved when the injection pressure is maintained 30 MPa, the nozzle diameter is set at 3.5 mm, and the moving speed is controlled at 90 mm/min. The slotted well configuration has the advantages of simple construction process, high efficiency, less consumables and high well quality, and is suitable for the mining of complex sandstone type uranium deposits to improve the recovery rate of uranium resources.
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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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