注氮防火时采空区气体变化与“三带”分布状况的检测

Examination of Gas Change and Distribution of Thriple Stripe at the Goaf While Injecting Nitrogen

在采煤工作面正常生产情况下 ,通过埋设在采空区的取样管道 ,对注氮前及注氮时气体定期取样 ,得出不同采空区深度的气样参数 ,结合采空区遗煤自燃氧化理论 ,进行定量定性分析 ,得出“三带”的分布情况 ,为综放工作面注氮防火参数的确定及注氮效果的检验提出了可靠的依据。

Under the condition of normal production at the coal face,covering up sampling pipeline at the goaf,sampling the gas periodically before and while injecting nitrogen,obtaining gas parameter of different depth at goaf,combining with the theory of spontaneous combustion of residental coal,proceeding quatiative and qualitative analysis,the distribution of thriple stripe was obtained to putting forward reliable proof for confirming parameter of injecting nitrogen and verifing its effect at fully mechanized coal face.