岩石单裂隙渗流-传热模型及其参数敏感性分析  

Seapage and heat transfer model of a single fracture of rock and relevant parameter sensitivity analysis

作　　者：董海洲[1,2] 罗日洪[2] 张令[2] 

机构地区：[1]河海大学地球科学与工程学院,江苏南京210098 [2]河海大学岩土工程研究所,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2013年第1期42-47,共6页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(50809024);江苏省自然科学基金(BK2009343);中央高校基本科研业务费专项(2009B12214)

摘　　要：针对岩石单裂隙渗流-传热问题,在传热几何简化模型的基础上,借鉴非稳态平面热源法建立岩石单裂隙在瞬态下的传热数学模型,由此计算任意时刻裂隙岩石的温度分布。同时,对裂隙岩石的传热影响因素进行研究。结果表明:渗透作用下岩石温度场受裂隙水流速度、隙宽、水流与岩石初始温度差等综合作用的影响。在一定范围内对这3个参数进行敏感性分析,得出岩石温度场对裂隙水流速度、水流与岩石初始温度差的敏感度较大,而对隙宽敏感度较小的结论。To study the seepage and heat transfer in a single fracture of rock,a simplified geometrical model of heat transfer in a single fracture was proposed.Based on the plane heat source method,a transient heat transfer mathematical model for a single fracture of rock was established to calculate the temperature distribution at any time.Furthermore,several factors influencing the heat transfer were studied.The study results show that the bedrock temperature field affected by seepage results from the joint effects of the velocity of fracture water,the gap width,and the initial temperature difference between rock and fracture water.Sensitivity analysis of these three parameters shows that the bedrock temperature field is more sensitive to the velocity of fracture water and the initial temperature difference between rock and fracture water,but less sensitive to the gap width.

关 键 词：单裂隙 渗流 传热模型 敏感性 

分 类 号：TU452[建筑科学—岩土工程]