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Outline
Aiming at the safety and inefficiency issues existing in the mining of Mianhuakeng mine, this study established a three-dimensional geological model of the ore body and conducted research such as stope structure parameter simulation and numerical simulation of deep-hole blasting disturbance, then obtained stope structure parameters and mining process parameters. Through on-site mining tests to verify and optimize these parameters, a pillarless sublevel deep-hole continuous mining technology was developed. This technology enables simultaneous operation of multiple processes and unmanned operation in the stope, resulting in the monthly production capacity of the stope approximately three times that of the existing horizontal slicing backfill mining technology, and a reduction in the direct mining cost of about 13%, significantly improving the mining efficiency and safety of Mianhuakeng 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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