Full
Outline
In view of the problem of high-temperature thermal hazard in the underground of Sanxin Gold-Copper Mine, a pre-cooling system was constructed based on the stratum cold storage cooling technology, utilizing the abandoned roadways in the mine's constant temperature zone for cold storage in winter and cold release in summer, which can achieve the overall cooling of underground airflow. Through theoretical calculations combined with the local geothermal conditions, a cost-effective comprehensive cooling scheme was finally formed. The Ventsim software was used to simulate and optimize the ventilation system to verify the feasibility of the selected scheme. The results show that the mine's pre-cooling line is selected as Line 1, with a ventilation resistance of 801.71 Pa, which can be matched with the K40-6No.18 fan to ensure efficient cold energy transmission. Before the optimization of the ventilation system, the temperature of the air path in the bottom level of the model in summer is 29.5 ℃, and after optimization, it drops to 25.3 ℃, with a reduction of 4.2 ℃, achieving a good cooling effect. Field application shows that after the optimization of stratum cold storage cooling, the average wet-bulb temperature of each measuring point in the deep level drops to 24.62 ℃, and the average wind speed increases to 1.27 m/s, and the temperature of the air path after cooling meets the regulatory requirement of being lower than 27 ℃.
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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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