以西安市御品轩食品工业园试验场为研究区, 建立三维水热耦合数值模型, 模拟预测不同抽灌井布局方案下 地下水渗流场和温度场的演化规律。结果表明, 含水层地温场的变化不仅与地下水的天然流场有关, 而且受抽灌井 布局的影响, 直线型异侧回灌模式对地温场的影响大于直线型同侧回灌模式。井距越大, 抽水井发生热贯通的时间 越长。从利于回灌角度看, 直线型异侧回灌优于直线型同侧回灌; 从控制热贯通效果看, 直线型同侧回灌优于直线 型异侧回灌。针对试验场地的具体条件, 两种井群布置方案均突破了热贯通现象, 仅考虑渗流场的影响, 最优布井 模式为直线型异侧回灌。

A three 2dimensional water 2heat coupled numerical model was developed to simulate and analyze the evolution of seep2 age and temperature fields under different layout schemes of pumping and injection wells in the Yupinxuan food industrial park of Xi can. The results showed that ( 1) the variation of groundwater temperature field is not only associated with the natural groundwater flow field, but also affected by the layout of pumping and injection wells, and the layout with injection wells on the opposite side has greater effects on the geothermal field than that with the injection wells on the same side; ( 2) the greater the distance between wells is, the longer the thermal transfixion of pumping wells encounters; ( 3) from the point of view of re 2 charge, the layout with injection wells on the opposite side is better than the layout with injection wells on the same side; and ( 4) from the point of view of controlling transfixion, the layout with injection wells on the same side is better than the layout with injection wells on the opposite side. According to the specific conditions of test site, both layout schemes broke through the phenomenon of thermal transfixion, and the layout with injection wells on the opposite side was selected if only the effects of seepage field were considered.

中国地质调查局地质调查项目( 12120113004800) ; 陕西省水利科技计划项目( 2014slkj 219); 陕西省自然科学基金( 2014JM1030)