中文摘要：

通过对裂隙岩体介质的热传导和渗透特性的分析,建立了耦合传热模型.采用导热微分方程描述裂隙岩体的温度场分布,并用加权余量的Galerkin法对岩体热传导方程进行离散,结合边界条件及计算参数对其进行数值求解.数值模拟结果表明,岩体内裂隙水流引发的热质迁移对裂隙岩体的温度场分布有重要影响.随着裂隙内水流渗透速度的增加,热交换的速度加快,缩短了达到热平衡的时间.渗流速度越大,交界面处温度等值线的不连续现象越明显,热交换越不充分.随着渗流速度的降低,热质迁移量减少,热交换的充分性增加,岩体内的温度等值线平滑连贯,温度梯度降低,裂隙内温度等值线的锐化现象逐步消除.沿着裂隙水流的流动方向,温度等值线变化率逐渐减小,热交换的速率逐渐降低.流固耦合作用对渗流作用下裂隙岩体的温度场分布具有明显的影响,流体温度的变化会影响裂隙岩体温度场的变化梯度.

英文摘要：

By analyzing the heat-transfer and seepage properties of fracture rock,the coupling model of heat-transfer is developed.Temperature field distribution of fracture rock mass is described by using heat-transfer differential equation.At the same time,the heat-transfer equation is discretized by using weighted residual Galerkin finite element.Combined with boundary condition and parameters,the numerical solution is obtained.The numerical simulation results show that the heat transportation resulted from fracture flow has major impact on the temperature field distribution of fracture rock mass.Heat-transfer increases as the increase of the velocity of seepage,and the time reaching thermal equilibrium is cut down.when the seepage velocity is larger,the discontinuity of temperature isoline is more obvious,and heat-transfer is more inadequate.With the reduction of the seepage velocity,the quantity of heat-transfer decreases and sufficiency of heat-transfer increases.Under the condition of low seepage velocity,temperature isoline in fracture rock is smooth,and temperature gradient is lower.The rate of temperature isoline is decreased along the fracture flow,which indicates that the rate of heat-transfer declines gradually.The fluid-solid coupling has evident effects on temperature field distribution of fracture rock,and fluid temperature may influence temperature gradients.