摘要
为研究梯形巷道围岩散热的特点,依据能量守恒定律,建立二维非稳态导热积分方程,运用有限体积法分别建立内部节点和边界节点的热平衡方程,采用VB语言编写围岩温度场及散热量数值计算程序,并通过一个实例进行数值分析.研究结果表明:初始暴露的巷道围岩,围岩壁面温差大,温度梯度大,即围岩散热量也比较大;随着通风时间的延长,围岩浅部区域的温度逐渐接近于风流温度,散热量逐渐衰减,并且衰减幅度逐渐的减小.
In order to research the characteristics of heat dissipation from surrounding rock in trapezoid roadway, the two-dimensional unsteady heat conduction integral equation of surrounding rock was established. The internal nodes and boundary nodes of heat balance equation was instituted by finite-volume method. Then the calculation procedure of the temperature field and heat dissipating capacity for surrounding rock was calculated by VB. Finally the numerical analysis was carried out by an example. The result shows that the surrounding rock wall temperature difference is big, and the temperature gradient large, in other words the heat release of surrounding rock is also big. As the extension of ventilation time, the surrounding rock of shallow area gradually closes to the air temperature, heat release gradually decay, and the attenuation amplitude decrease gradually.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2015年第8期898-904,共7页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金项目(51174211)
关键词
梯形
围岩散热
有限体积法
第三类边界
围岩温度场
trapezoid
surrounding rock heat dissipation
finite-volume method
third type of boundary
temperature field of surrounding rock
