1�� College of Construction Engineering��Jilin University��Changchun 130026��China; 2�� Logistics Service��Changchun University of Science and Technology��Changchun 130022��China

Heat transfer between pipe heat exchanger and rock is a complex process��and finite element simulation method is an effective method to analyze this process�� Through the comparative analysis to two-dimensional single well model��the authors establish two-dimensional multi-wells heat transfer model��there are nine heat storage wells with interval of 4 meters for each�� The heat transfer process of this model follows the classic heat transfer theory�� According to the ANSYS grid division principle��solution region is divided into the cells with the maximum edge length of 0. 1 m and the smallest edge length of 0. 01 m�� Buried pipe is applied heat load density inside��and applied ground temperature boundary load outside��and after 72 hours simulation of heat storage process��accurate changing regularity of temperature field of rocks around multi-wells is obtained�� The highest temperature is 40. 263�棬the lowest is 10�棬and the influence radius is 1. 4 m�� The increased ampltude of temperature decreases�� and the migration patterns of temperature and heat are obtained�� The simulation results match well with the actual measurements��