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This paper focuses on the "CO2+O2" in-situ leaching uranium process of the Qianjiadian uranium deposit, and conducts an in-depth investigation into the relationship between filter length, leaching recovery rate, and operating water volume. Actual field data are used for analysis, and the results show that there is a strong positive correlation between filter length and operating water volume: the operating water volume increases significantly in the filter length of 7-11 m, with an average growth rate of 5.2% per meter; while the growth slows down in the filter length of 12-18 m, with an average growth rate of 1.3% per meter. In contrast, a strong negative correlation is observed between filter length and leaching recovery rate: the leaching recovery rate decreases gently in the filter length of 7-11 m, with an average decline rate of 0.75% per meter; the decline accelerates in the filter length of 12-14 m, with an average decline rate of 2.0% per meter; and it drops sharply in the filter length of 15-18 m, with an average decline rate of 3.67% per meter. Based on the above analysis, it is determined that the optimal filter length range for the "CO2+O2" in-situ leaching uranium process of the Qianjiadian uranium deposit is preferably 7-9 m. For ore segments with larger ore body thickness, the filter length can be appropriately adjusted within the range of 16 m, but shall not exceed 16 m.
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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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