To effectively evaluate the future water resources supply and demand of mining area,it is necessary to accurately predict the future mine water inflow.Based on the ongoing hydrogeology and water filling conditions of Baolixile open pit Mine,four prediction methods,horizontal water collection gallery method,large well method,hydrogeological analogy method and water balance method,are used to forecast the water inflow in 2025.The results show that hydrogeological parameters of horizontal water collection gallery method and large well method are greatly affected by human factors,and the prediction results intend to be larger.The water balance method is only based on mine area data,resulting in an inaccurate prediction.Hydrologic analogy method requires higher similarity conditions and has better accuracy.Hence,according to the prediction results of hydrologic analogy method,the predicted water inflow of Baorixile open pit Mine in 2025 is 1,852,700 m3/a.The influence of mining action on groundwater flow field is simulated and analyzed.The simulation results show that the maximum drawdown depth of mining diving water level is 50 m.With the continuous advance of mining in the working face,the area of groundwater falling funnel first increases and then remains unchanged.The study provides reliable data support and technical support for safety production,drainage design and optimal allocation of water resources in mining areas.
open pit water inflowhorizontal collection gallery methodlarge well methodhydrogeological analogy methodwater balance method
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