Y形通风采空区注氮防灭火的数值模拟  

Numerical simulation of preventing spontaneous combustion by nitrogen injection in goaf of Y-type ventilation face

作　　者：李宗翔[1] 李海洋[1] 贾进章[2] 

机构地区：[1]辽宁工程技术大学职业技术学院,辽宁阜新123000 [2]辽宁工程技术大学资源与环境工程学院,辽宁阜新123000

出　　处：《煤炭学报》2005年第5期593-597,共5页Journal of China Coal Society

摘　　要：基于非均质漏风渗流方程、气体(瓦斯、氧、CO)渗流-扩散方程和多孔介质渗流综合传热方程,建立了开采区注氮采空区自燃防灭火非定常数值模型.用迎风格式有限元方法联立求解,通过计算机程序(G3)对Y形通风采空区注氮问题进行了数值模拟.描绘了Y形通风注氮采空区的漏风流态和瓦斯、氧、CO等气体浓度以及温度的分布状态及其变化过程;以图形方式给出了各量的区域分布解,分析了Y形通风采空区在注氮条件下特有的规律;给出了注氮与工作面推进的合理配比关系.在进风侧向采空区注氮,对于防止Y形通风采空区自燃效果明显.Based on heterogeneous and porous medium seepage of air leakage-diffusion equation, as well as, gas and porous medium synthesis heat transferring equation, a spontaneous combustion non-steady numerical model of nitrogen injection goaf was established; the process of nitrogen injection in goaf of Y-type ventilation face was numerically simulated, by upwind finite element method through the computer programs （G3）. The air flow state of nitrogen injection in goal of Y-type ventilation face was described, the distribution state and its changing process of the concentration of the gas, oxygen, CO and temperature were done, too. The field solution was given in visual display. The special law under the condition of nitrogen injection in Y-type ventilation goaf was analyzed. The reasonable relation of nitrogen injection and the speed of working face boosting were given. The effect to prevent the spontaneous combustion in Y-type ventilation goaf is obvious at the air in side.

关 键 词：Y形通风 采空区 注氮 温度场 有限元 

分 类 号：TD752.2[矿业工程—矿井通风与安全]