摘要
选取了影响围岩不稳定换热系数的主要因素,借助MATLAB分析软件,分析巷道几何尺寸、围岩导热系数、巷道表面对流换热系数及湿润程度、通风时间对围岩不稳定换热系数的影响规律.结果表明:通风时间对围岩不稳定换热系数的影响最为明显,其它各因素的影响均较小.不稳定换热系数随巷道断面积增加而减小,随着巷道湿润程度、对流放热系数的增加而增加,随岩体导热系数增加而增加,但变化量均很小.
In order to study variation law of unsteady heat transfer coefficient of rock surrounding,this paper analyzes the geometry size of roadway,the conduction coefficient of the rock surrounding,the convective heat transfer coefficient and the degree of wetness of the tunnel surface,ventilation time effect on variation law of unsteady heat transfer coefficient of rock surrounding by MATLAB software.Results show that ventilation time has significant influence on it,but others are not found to have significant association with it.Unsteady heat transfer coefficient of rock surrounding decreases with the increase of tunnel area,and it increases with the increase of roadway moist degree and convective heat transfer coefficient,and it also increases with the increase of thermal conductivity coefficient of rock,but all of the variable quantity are small.
出处
《矿业工程研究》
2013年第4期8-13,共6页
Mineral Engineering Research
基金
国家自然科学基金资助项目(51074072
51134005)
湖南省科技计划资助项目(2012FJ2001)
关键词
围岩不稳定换热系数
断面积
对流换热系数
导热系数
通风时间
unsteady heat transfer coefficient of rock surrounding
area of roadway section
convective heat transfer coefficient
conduction coefficient
ventilation time
