采空区自燃“三带”分布规律及影响因素分析

Analysis of Distribution Regularity and Influence Factors of Spontaneous combustion "Three Zones" in Goaf

准确掌握采空区"三带"分规律对防灭火工作非常重要。本文归纳了采空区"三带"划分的四种类型,并对采空区"三带"分布状况进行分析、划分。结果表明采空区"三带"分布状况不仅与浮煤厚度、漏风强度、氧浓度有关,浮煤的散热量及采空区瓦斯浓度对此也有着重要影响。采空区"三带"分布状况应根据浮煤厚度与其自燃临界厚度的相对大小分类划分。

It is very important for the defending and extinguishing fire in mine to command distribution regularity of “three zones” in goal accurately. Four divisions of “three zones” in goal were concluded in the text, and distribution of “three zones” in goal was analyzed and divided. The result indicates that distribution of “three zones” in goal is not only related with thickness of residual coal, air leakage intensity and oxygen concentration, heat dissipating capacity and gas concentration in goal also have much effect to it. Distribution of “three zones” in goal should be ploted out according to the relation of thickness of residual coal and spontaneous combustion critical thickness.