特厚煤层综放工作面自燃危险区域分布规律研究

Study on Distribution Laws of Spontaneous Combustion Hazard Zone at Fully Mechanized Caving Face in Extra-thick Coal Seam

摘要: 通过对杨涧煤矿特厚煤层90101综放工作面主要气体进行现场观测，数据采集，应用Excel对其采空区的氧气分布进行了初步分析，同时结合CFD模拟技术进一步研究了氧气浓度在整个采空区的分布特征，综合现场观测和模拟数据进行了采空区自燃“三带”的初步划分。采用CFD技术研究了配风量对采空区“自燃带”分布特征的影响。结果表明，随着工作面风量的增大，自燃带的宽度会增加，且工作面风量对回风巷侧自燃带宽度的影响大于进风巷侧。

Abstract: The main gas in 90101 fully mechanized caving face of Yangjian Coal Mine has been observed. In the same time, the study analyzed the oxygen distribution in goaf by using the Excel initially and the collected data. Then the oxygen concentration distribution laws in whole goaf are analyzed with CFD. At last, the spontaneous combustion"three zones" has been divided.The influence of air distribution volume on the distribution laws of spontaneous combustion"three zones" is studied with CFD technology. The result shows that the width of spontaneous combustion zone will increase with the increase of the working face air volume, and the influence is more obvious in the wind return side than the wind inlet side.