Full
Outline
In view of the threat of complex karst water disasters in deep mining of metal mines, it is urgent to develop refined curtain closure water control technology and multi-dimensional effect evaluation methods. In order to improve the efficiency of water disaster prevention and control and verify the engineering effect, ZK Iron Mine was selected as the research object. Combined with geophysical prospecting and drilling to identify the karst channel in advance, the fine grouting technology based on channel identification was implemented (dynamic control pressure of 2-4 MPa, water-cement ratio of 1∶1-0.6∶1). FEFLOW software was used to simulate and predict the change of groundwater flow field before and after curtain closure and the attenuation effect of daily mine drainage (reduced to 7 984 m3/d, water plugging efficiency of 65%). A multi-dimensional effect evaluation system integrating grouting volume analysis, hydrological monitoring, geophysical exploration, inspection hole verification and AHP quantitative evaluation was constructed. The results show that the fine grouting process effectively plugs the complex karst fracture network. The daily average drainage volume of the mining area decreased from 22 984 m3/d to 7 770 m3/d, a decrease of 15 214 m3/d, and the water plugging efficiency reached 66.2%, which is close to the simulated predicted value. The comprehensive evaluation score of AHP is 0.895 (excellent grade), among which the reduction of drainage rate (weight of 31.1%) and the contribution of water plugging efficiency are significant. This technical system provides theoretical support and a replicable technical paradigm for aquifer protection and water disaster prevention and control in similar metal mines.
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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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