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Outline
A lead-zinc mine is exploited by adit+shaft+slope path, and mined by sublevel open stope method and shallow hole retaining method. This method has large exposed area and poor safety, and the goaf formed by stope has buried hidden danger for mine production. With the increase of depth, the stability of surrounding rock becomes worse, the ore body becomes thinner and more dispersed, resulting in the increase of mining dilution rate and the extremely high mining and mineral dressing cost, and the original mining method is no longer applicable. According to the characteristics of ore body and the current production situation of the mine, the mining of the ore body below the middle level of 2 522 m adopts application of mechanized upward horizontal slicing and filling mining method, and uses large trackless equipment to carry out mining operations, which reduces the exposed area of the stope, improves the safety of underground operation, avoids a large number of goaf, solves the hidden danger in production and improves the recovery rate of resources. The production capacity, comprehensive recovery rate, comprehensive dilution rate and other indicators are optimized. The research results can be used as an example for other mines in this area.
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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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