裂隙岩体等效导热系数影响因素的分析研究

为研究岩体等效导热系数各影响因素的作用机理,通过ADINA数值模拟和室内试验,分别分析了孔隙率、裂隙、裂隙水流速和流体粘性等信息元对岩体等效导热系数的影响.结果表明:等效导热系数与孔隙率、流体粘性呈负相关关系,并且在裂隙的不同方向上存在差异;低流速时,等效导热系数与流体流速呈正相关关系,超过某一临界流速呈负相关关系.为复杂条件下导热系数的确定以及更加准确的分析温度场分布情况提供了新方法和依据.

Analysis of influnence factors on equivalent thermal conductivity of fractured rock mass

In order to study the function mechanism of the influence factors on the rock equivalent thermal conductivity,based on ADINA numerical simulation and indoor experiments,a series of separate analyses on porosity,cracks,fissures water flow rate and fluid viscosity were carried out.These factors were found to be the information units that have different effects on rock equivalent thermal conductivity.The results show that the equivalent thermal conductivity and porosity,fluid viscosity have negative correlations,and there are some differences on different directions of the cracks;that when the flow rate is low,the relationship between the equivalent thermal conductivity and flow rate are positive correlation,but when the flow rate exceeds certain critical flow rate,the correlations are negative.A new method to determine the thermal conductivity under complex conditions and a more accurate analysis of the temperature distribution are provided.