摘要
矿井空调必须考虑由采空区热风引起的温度升高,采空区热风是由围岩散热和氧化放热等引起的,影响因素多,关系复杂。从研究采空区热源入手,对影响采空区热风的因素进行分析。利用质量守恒定律和达西定律,建立了采空区气体流动微分方程;利用传热学理论和能量守恒定律建立了采空区温度场方程,从泛函出发,用有限单元法进行分析,用VB语言编制了数值计算软件;结合具体情况,运用数值软件解算出在不同工作面阻力、原始岩温下采空区热风的运移规律,并对解算结果进行了分析。
For air conditioning of coal mines, consideration must be given to the temperature rise caused by the goaf hot blast. However, resuting from oxidation heat release, heat transfer of surrounding rock, etc. , goaf hot blast is influenced by many factors and involves complicated relations. Beginning with goaf heat source, the factors affecting goaf hot blast are thoroughly investigated. Adopting mass conservation law and Darcy＇s law, the differential equations of air flow in goaf were established; based on the heat transfer theory and energy conservation law, the differential equation of temperature field in goaf was built. After resolving the above equations by finite element method based on functional, a computer program with Visual Basic language was compiled; in consideration of different conditions in an actual mining face, the mitigation law of goaf blast under different ventilation resistance and primitive rock temperatures was derived, and at last, the analysis results were discussed.
出处
《煤矿安全》
CAS
北大核心
2011年第6期11-14,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(50674091)
中央高校基本科研业务专项资助项目(2010YZ01)
关键词
空调降温
数学模型
采空区
泛函
有限元分析
air - conditioning cooling
mathematical model
goal
functional
finite element analysis
