为研究高承压(大于3 MPa)含水层水文地质参数特征,以矿井奥灰含水层放水试验结果为基础,采用三维地下水模拟软件(Visual MODFLOW)建立煤层底板奥灰地下水系统的三维数值模型,通过模型的拟合校正,分别应用局部和全局参数灵敏度分析方法对高承压含水层渗透系数K、弹性给水度μ,水头边界h进行了灵敏度分析。结果表明,h对地下水动态变化的影响最为显著,而其他参数的影响则相对较小,μ在影响水头变化的同时对水头动态的响应时间影响明显,另外参数的全局灵敏度大于其局部灵敏度之和,说明模型总灵敏度偏大。

In order to study hydrological parameters features of the high pressurized (over 3 MPa) aquifer, based on the dewater test results of mine aquifer, a 3D u nderground water simulation software Visual MODFLOW was applied to establish 3D numerical model of water system in Ordovician limestone under the floor of the se am.With the ftting correction of the model, the sensitivity analysis method of the local and overall parameters individually was applied to the sensitivity analysis on the permeability coefficient of the high pressure aquifer, elastic water feeding yield and water head boundary.The results showed that the water head boundary affected to t he dynamic variation of the underground water was obvious and affected to other parameters was less.While the elastic water feeding yield affected to the variation of t he water head, the elastic water feeding yield affected to the dynamic response time of the water was obvious.The overall sensitivity of the parameters would be higher than the sum of the local sensitivity and thus the total sensitivity of the model was too high.

国家自然科学基金重点资助项目(51034003)；陕西省科技统筹创新工程计划资助项目(2011KTZB01-02-02)；