During the excavation of deep foundation pit, the seepage of groundwater forms a drawdown cone around the foundation pit.

利用该模型分析了在软土地区深基坑开挖引起地下水渗流场的变化。

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During the test, the rock deformation built up a permeability drawdown cone around the wellbore of Well Kela 205, but the decline scope is small and its effect on productivity is not serious.

测试过程中岩石变形使近井区域形成了一个渗透率下降漏斗，但下降的幅度较小，对气井产量的影响也不大。

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