中文摘要：

为了确定特厚高瓦斯易燃煤层综放面临界供风量,根据SF6示踪气体及束管监测系统,实测了工作面的立体漏风及不稳定风量下的采空区遗煤氧化特征,并采用Fluent软件模拟了多变风量下风量对自燃＂三带＂的扰动关系。结果表明：漏入采空区又流出的风量占总风量的5.86%,经采空区漏入高抽巷风量占总风量的18.43%;风量增加对采空区自燃＂三带＂扰动区域主要表现在采空区中部及进风端,但总体呈现回风侧氧化带宽度增加最大,中部次之,进风侧最小;最后基于煤自燃防治及瓦斯抽采综合确定出工作面临界供风量为1100m^3/min。

英文摘要：

In order to determine critical air volume of top coal caving face in extremely thick high gas and spontaneous combustible coal seam,SF6 tracer gas and beam tube monitoring system were used to measure stereo air leakage of working face and residual coal oxidation characteristics under the condition of unstable air flow in the goaf,and fluent software was used to simulate the perturbations relationship of changeable air volume on spontaneous combustion ＂three zones＂. The results showed that,the air volume leaked out into the goaf and then outflowed was 5. 86% of the total air volume,while the air volume leakage into the high pumping lane was 18. 43%; the disturbance zone of goaf spontaneous combustible＂three zones＂from increasing air volume was mainly in the central and the inlet wind end of the goaf. Overall,the width of oxidation zone in return air side increased the most,followed by central,and inlet side increased the least; finally,the critical air volume of working face is determined as 1100m^3/min considering the coal spontaneous combustion prevention and gas drainage.