Full
Outline
Daye Iron Ore is in the continuous mining stage of −270 m to −360 m middle section, the remaining ore volume in the −270 m middle section is insufficient, and the stope production capacity will be insufficient in the early stage of −360 m middle section. According to the process characteristics of the upward horizontal layered cut and filling method and sublevel drilling and stage open stoping with subsequent filling, based on the distribution of each stope, the mining process and the current situation of the mining equipment in the −360 m middle section of Daye Iron Mine, the optimization model of stope mining equipment scheduling was established. The genetic algorithm was used to simulate the most compact process arrangement, and the maximum number of simultaneous stopes was solved based on the equipment utilization function. Two schemes of single-section mining and two-section mining were proposed. The results show that when the number of stopes that can be mined simultaneously in the section of −270 m is 3, and the number of stopes that can be mined simultaneously in the section of −360 m is 5, the maximum daily production capacity reaches 4 218 t/d. The scheme of the two-section mining is more efficient, with a more stable ore production and the annual production capacity of 1.437 million tons. The two optimized mining schemes are helpful to solve the problems of insufficient production capacity and unstable production during the two-section continuous mining of Daye 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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