大恒煤矿开采对地下水疏干的影响
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摘要
应用Visual Modflow建立了水文地质概念模型和数学模型,以山西省朔州市平鲁区大恒煤矿开采为例探讨了其对地下水水位和水量的影响。在对矿界周边50km2的范围内水井水位进行调查的基础上,依据划分的各采区开采时间,结合区域地下水埋藏深度与地层走向和调查范围内各个时期水井水位埋深的监测,对大恒煤矿的开采进行建模并验证了模型的准确性。研究结果显示,大恒煤矿开采28.8a之后会形成面积9.5km2,深度55m的降落漏斗,表明煤矿开采会使上覆含水层水位下降并形成降落漏斗,对地下水资源造成严重破坏。
Hydrogeological conceptual and mathematical models were established by Visual Modflow,then taking Daheng coal mining as an example to explore the impacts on groundwater level and quantity in Shuozhou City of Shanxi Province.We conducted an investigation of water level in wells within the scope of50km2 around the mining boundary.According to the mining time of each mining district,and combining with the regional groundwater buried depth and regional stratigraphic trend,as well as the monitoring results of the well water level during various periods within the scope of investigation,a model on Daheng coal mining and verification of the accuracy of the model was constructed.The result showed that the coal mining of Daheng mine will cause the cone of depression 28.8years after mining,which has an area of 9.5km2 and depth of 55 m.It indicated that coal mining will make the overlying aquifer drawdown and the formation of the cone of depression.
Hydrogeological conceptual and mathematical models were established by Visual Modflow,then taking Daheng coal mining as an example to explore the impacts on groundwater level and quantity in Shuozhou City of Shanxi Province.We conducted an investigation of water level in wells within the scope of50km2 around the mining boundary.According to the mining time of each mining district,and combining with the regional groundwater buried depth and regional stratigraphic trend,as well as the monitoring results of the well water level during various periods within the scope of investigation,a model on Daheng coal mining and verification of the accuracy of the model was constructed.The result showed that the coal mining of Daheng mine will cause the cone of depression 28.8years after mining,which has an area of 9.5km2 and depth of 55 m.It indicated that coal mining will make the overlying aquifer drawdown and the formation of the cone of depression.
引文
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[3]乔小娟,李国敏,周金龙,等.采煤对地下水资源与环境的影响分析:以山西太原西山煤矿开采区为例[J].水资源保护,2010,26(1):49-52.
[4]李七明,翟丽娟.华北型煤田煤层开采对含水层的破坏模式研究[J].中国煤炭地质,2012,24(7):38-43.
[5]许家林,朱卫兵,王晓振.基于关键层位置的导水裂隙带高度预计方法[J].煤炭学报,2012,37(5):762-769.
[6]高国军,赵亮.浅谈大平煤矿库下综放开采保护层厚度的选取[J].中国新技术新产品,2012(21):103.
[7]翟远征,王金生,苏小四,等.地下水数值模拟中的参数敏感性分析[J].人民黄河,2010,32(12):99-101.
[8]成春奇,郑高升,魏广庆.基于单孔稳定流抽水试验观测值的非稳定流求参方法[J].煤田地质与勘探,2005(S1):98-100.
[9]曹运江,廖坤炎,冯少真,等.贵州谊源煤矿矿山环境影响耦合分区[J].煤田地质与勘探,2011(3):33-37.
[10]吴吉春,薛禹群,黄海,等.山西柳林泉域地下水流数值模拟[J].水文地质工程地质,2001(1):18-20.