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煤矿地下水流场动态模拟及预测研究 被引量:1

Dynamic simulation and prediction of groundwater flow field in coal mine
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摘要 煤炭资源开采导致地下水长期疏干形成以工作面为中心的降落漏斗,采用Visual MODFLOW(VMOD)对煤矿地下水流场进行动态数值模拟,直罗组下段含水层受矿井疏干影响,降落漏斗直径在不断增加,2021年漏斗中心最大降升达到241 m,降落中心水位已低于该含水层隔水顶板,该区域含水层由承压转无压。VMOD模型预测未来持续疏干状态下地下水流场的结果表明,含水层接受侧向补给量较小,2035年由于下部煤层开采时部分煤层“两带”无法导通上部煤层采空区,导致疏水量有所降低。直罗组底部含水层降落漏斗的中心水位有所恢复,半径也有所减小。 The long-term drainage of groundwater by coal resources mining forms a depression cone centered on the working face.Visual MODFLOW(VMOD)is used to conduct the dynamic numerical simulation of the groundwater flow field in a coal mine.The aquifer of the lower member of Zhiluo Formation is affected by the mine drainage,and the diameter of the depression cone keeps increasing,with the maximum descending of the cone center reaching 241 m in 2021.The water level of the descending center has been lower than the aquifer barrier roof,and the aquifer in this area has changed from pressure to no pressure.The results of groundwater flow field predicted by VMOD model in the state of continuous dredging in the future show that the aquifer receives less lateral recharge.In 2035,because the“two zones”of some coal seams cannot channel through the goaf of the upper coal seam during the mining of the lower coal seam,the drainage will decrease.The central water level of the depression cone of the bottom aquifer of Zhiluo Formation has recovered and its radius has also decreased.
作者 芦震 张小五 王鹏 樊发旺 LU Zhen;ZHANG Xiaowu;WANG Peng;FAN Fawang(Ningxia Hui Autonomous Region Coal Geology Bureau,Yinchuan 750011,China)
出处 《陕西煤炭》 2023年第6期63-67,77,共6页 Shaanxi Coal
基金 宁夏回族自治区自然科学基金资助项目(2021AAC03464)。
关键词 降落漏斗 VMOD模型 数值模拟 地下水流场 depression cone VMOD model numerical simulation groundwater flow field
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