摘要
基于非均质多孔介质漏风渗流方程、多相气体渗流-扩散方程和多孔介质渗流综合传热方程,建立了采空区瓦斯与自燃发火耦合数值模型,开发了用迎风格式有限元方法联立求解的计算机程序(简称G3)。计算以图形方式给出各量的区域分布解,从理论上描绘了Y形通风采空区的漏风流态,动态描绘了瓦斯、氧和CO的体积分数以及温度分布状态及其变化过程,并证明了Y形通风形式能避免采空区瓦斯向工作面涌出。计算中采空区按冒落非均质介质处理,考虑了瓦斯涌出对自燃的耦合作用,给出了这种耦合作用关系和解决办法。Y形通风采空区的大量漏风有助于瓦斯的排放,同时也加剧了采空区遗煤的自燃,两者存在着顾此失彼的关系。
The paper aims to introduce the author＇s work on the numerical simulation of spontaneous combustion and maleficence gas drainage in goaf with y-type ventilation fashion. The present numerical simulation model is established based on the heterogeneous and porous medium seepage equation of air leakage, seepage-diffusion equation of gas, such as gas, oxygen and carbon monoxide, as well as the synthesis heat transferring equation for seepage in porous mediurn. At the same time, upwind finite element method is also used to develop a computer program （G3） that can help to solve the model. After that, the district distribution solution for every variable is given as the graphics mode with the air leakage state of goaf described in theory with Y-type ventilation, which is proved to be favorable for preventing the gas effusion from goaf to the working face. In the process of simulation, goaf is treated as heterogeneous medium while the coupling effect of gas effusion to the spontaneous combustion has also been taken into consideration. And finally, it is necessary to point out that a great deal of air leakage in goaf with Y-type ventilation may contribute to the gas drainage, but the spontaneous combustion of remnant coal in goaf may resulted in. Therefore the relationship between the gas drainage and the spontaneous combustion of remnant coal in goaf can be said that： ＂One cannot attend to one thing without neglecting the other. ＂ The author has also given the coupling relationship and his solution to this complicated situation.
出处
《安全与环境学报》
CAS
CSCD
2005年第6期108-112,共5页
Journal of Safety and Environment
关键词
煤矿安全
Y形通风
采空区自燃
瓦斯排放
自燃与瓦斯耦合
温度场
有限元
safety in coal mines
Y-type ventilation fashion
spontaneous combustion of goaf
gas drainage
coupling of gas and spontaneous combustion
temperature field
finite element
作者简介
李宗翔，副教授，硕士，从事煤层注水、采空区瓦斯和自燃耦合理论研究。
