中文摘要：

由于高瓦斯易自燃煤层采用U＋I型通风,上下隅角极易向采空区形成大量漏风,从而诱发采空区浮煤发生自燃.通过数值模拟与现场实测,利用自燃氧化带区域的分布情况作为量化指标,表征上下隅角封堵措施对采空区浮煤自燃的影响效应.首先,利用FLUENT模拟隅角封堵前后采空区的立体瓦斯场、氧气场以及速度场分布,并以风速与氧气体积分数双指标划分采空区的自燃氧化带区域;其次,利用SF6示踪气体实测隅角封堵前后工作面的漏风量及漏风特征;最后,埋点实测封堵前后采空区的氧化环境,对比模拟结果,从而验证封堵措施的有效性,为矿井瓦斯抽采与煤自燃防治提供技术参考.

英文摘要：

Due to U ＋ I type ventilation used in a high gas and combustible coal seam, the upper and lower corners are prone to the formation of large number of air leakages in goal,which induce goaf float coal sponta- neous combustion. In this paper, numerical simulation and field measurement were used, and the distribution of a spontaneous combustion oxidation zone was taken as a quantitative index to show the effect of goal float coal spontaneous combustion influenced by corner plugging measures. Firstly,the distribution of a three-dimensional gas field,an oxygen field and a velocity field in goal were simulated by the FLUENT software before and after corner plugging, then a spontaneous combustion oxidation zone in goal was divided with double indicators of the wind velocity and oxygen concentration. Secondly, the air leakage and leakage characteristics before and after corner plugging were measured by using SF6 tracer gas. Finally, the effectiveness of plugging measures was ver- ified by comparing the oxidation environment in goal before and after plugging measured by the buried points with the simulation results,which provided a technical reference for the subsequent mine gas extraction and fire prevention work.