矿坑涌水可利用量研究

为缓解矿区供排水矛盾,合理利用矿区水资源,文章以安徽省淮北平原某煤矿为研究对象,建立了与矿床开发利用方案相适应的地下水流数值模拟模型;利用经过识别后的数值模型,对矿坑涌水量进行了预测,得到预测期内正常矿坑涌水量将由7 100m3/d逐渐衰减至5 106m3/d;在此基础上,考虑到不确定性因素的影响,依据渗透系数的空间随机分布特征,探讨了矿坑涌水量预测结果的不确定性。结果表明:当保证率为90%时,预测初期可利用的水量为3 924m3/d,20a后逐渐递减为2 672m3/d。所得结果为制定矿区水资源综合利用方案提供了可参考的依据。

Research on available quantity of mine pit water

In order to mollify the contradiction of water supply and drainage and rationally utilize water resources in mining area,and by taking a coal mine in Huaibei plains as an example,a numerical simulation model of underground water,which is in accordance with the scheme for developing and utilizing the deposit,is established.Based on the identified simulation model,the quantity of mine pit water is predicted and it is found that it will decay from 7 100 m3/d to 5 106 m3/d during a predication period.The uncertainty of the prediction of mine water discharge is analyzed according to the space random distribution of permeability coefficient,considering the influence of uncertainties.The result reveals that when the assurance rate is 90%,the available quantity of water would be at 3 924 m3/d during the early-stage of predication,and would decay to 2 672 m3/d in twenty years.The result offers reliable evidences for the utilization plan of mine pit water.