Full
Outline
Aiming at the problems faced by the selection of mining methods in the process of open-pit to underground mining in Sijiaying Iron Mine, based on the complex deposit occurrence characteristics of the mining area and the mining technical conditions of the mining surface environment, the stage open-stope subsequent filling mining method and the sublevel open-stope subsequent filling mining method were proposed, and the traditional staggered arrangement of ore transportation was optimized. The results show that the mining method of combined mining of scraper and pit truck in stage can effectively shorten the transportation distance of scraper and improve the transportation efficiency. When the stage height of the optimized mining method is 60 m, the height of the chute in the mining area is reduced by 30 m, and the number of chutes in the panel area is reduced from 6 to 2, which reduces the amount of preparation work and reduces the mining cost. The key problems that should be paid attention to in the selection and implementation of mining methods in this mining area are pointed out, in order to provide a guidance for the open-pit to underground mining work in Sijiaying Iron Mine.
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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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