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Outline
Bayan Obo ore deposit is an ultra large multi-metal ore deposit with such as Fe, rare earth and Nb. In recent years, the deep prospection has been carried out in the main east mine and the deepest drill hole designed is up to 1 700 m. Part of stratum (especially the part of ore reception and removal) is with such complicated features as fragmentation, leakage, collapse and chip off-falling. In order to avoid such accidents as sticking of tool, tools truck or obsolescence of drill hole caused by instability of drill hole, the low (no) solid drilling mud, anti-deflection drill + anti-deflection technology with packed hole assembly and the relative technical measures are applied so that the drilling is smooth, the construction quality and efficiency are good, which could provide the technical assurance measures and experiences for the construction of main mine in future.
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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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