宝日希勒露天煤矿涌水量预测研究

Water inflow prediction Baorixile Open-pit Mine

为有效评估未来矿区水资源供需平衡情况,需精准预测矿区未来矿井涌水量。根据宝日希勒露天矿现有水文地质及充水条件,采用水平集水廊道法、大井法、水文地质比拟法以及水均衡法四种方法对2025年矿坑涌水量进行了预测。结果表明:水平集水廊道法和大井法的水文地质参数选取受人为因素影响较大,预测结果偏大;水均衡法仅能根据矿区水均衡资料进行预测,预测精度不高;水文比拟法对相似性条件要求较高,预测精度较精准。最终根据水文比拟法预测结果确定宝日希勒露天矿2025年矿坑涌水预测水量为185.27万m^(3)/a。模拟分析了矿区采动作用对地下水流场的影响,模拟结果表明,工作面采掘潜水水位最大降深值为50 m。随着工作面采掘的不断推进,地下水降落漏斗面积先增大后保持不变。该研究为矿区安全生产、矿区排水设计以及水资源优化配置提供可靠的数据支撑和技术支持。

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 m^(3)/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.