| Yuxian Mine Area is a rich region with1.49billion ton of resources geological reserves and0.91billion ton of recoverable reserves. Most minable seams are threatened by floor limestone aquifer. Based on amount of geology datum and hydro-geological data, the article analyzes the major characteristic of any aquifer, aquiclude and the whole groundwater system. It is implemented water bursting coefficient to evaluate the hazard of floor limestone aquifer for No.1, No.5and No.6coal and partitions the area for Cuijiazhai Mine, Danhou Mine, Beiyangzhuang Mine and Nanliuzhuang Mine. And it is showed the5and1coal seams inrush in danger part areas,6coal safety in the region. Then, it is application of structural lithologic field, groundwater flow field and water chemical field to determine hydrogeological conceptual model, and using Visual Modflow software to establish the regional groundwater three dimensional flow numerical model, and the model is identified by actual long-term dynamic groundwater level material. At last, the optimal management model of groundwater is introduced, and the optimal discharge quantity is calculated for coal water bursting danger zone that No.5is.9424.5×104m3/a and No.1is.18078.1×104m3/a. Therefore, the security is insured while groundwater is protected and supplying and discharging is combined in the mine area. The achievement supports safe mining, and provides references for the management of groundwater. |
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