荆各庄矿煤自燃氧化性能分析及防火对策

发布时间：2018-07-31 20:22

【摘要】：我国矿井火灾频发,尤其在边角余煤、老采空区、复采工作面都是发生火灾高发区。荆各庄矿开采三十多年,12煤层从未出现过自然发火事故,但是近几年12煤层复采区自然发火频繁,并且9煤层复采区煤体内赋存大量一氧化碳气体,所以选定荆各庄矿为研究对象。结合煤自燃氧化机理的分析基础之上,对复采区域和原生煤层的煤样进行了自燃氧化性能的分析。首先,采用程序升温与气相色谱仪联用实验,分析了CO指标气体随温度变化规律,可知煤自燃低温氧化早期阶段,复采过的煤更易于吸附氧,表现出了更强的氧化性能。其次,采用红外光谱分析技术,对50℃、70℃、80℃、100℃、120℃、160℃温度下各煤样的活性基团变化进行分析,结果显示在低温的条件下,煤分子结构中,发生氧化反应主要部分就是羟基、芳香烃、脂肪族类和含氧官能团,其含量变化最为明显。通过综合比较发现,由于复采煤层早期的开采破坏了原有煤层结构以及煤分子结构,使得复采区域煤的氧化性能发生了改变,自燃倾向性增强,导致整体的自燃危险程度增大。综合理论分析和现场实测结果,针对荆各庄矿井开采后期自然发火特点,通过研究荆各庄矿煤自燃发火规律,提出了一系列荆各庄矿的煤炭自燃防治措施。研究成果对荆各庄矿提高煤炭采出率和安全开采具有重要的意义。
[Abstract]:Mine fires occur frequently in China, especially in edge coal, old goaf and remining face. In Jinggezhuang Coal Mine, there has never been a spontaneous combustion accident in coal seam No. 12 for more than 30 years, but in recent years, natural combustion occurs frequently in the area of coal seam 12, and a large amount of carbon monoxide gas exists in the coal body in the area of coal mining in coal seam 9. So choose Jinggezhuang mine as the research object. Based on the analysis of oxidation mechanism of coal spontaneous combustion, the spontaneous combustion oxidation performance of coal samples in remining area and primary coal seam is analyzed. Firstly, by using programmed temperature and gas chromatograph, the variation of CO index gas with temperature is analyzed. It is known that in the early stage of low temperature oxidation of coal spontaneous combustion, the remined coal is easier to adsorb oxygen and has stronger oxidation performance. Secondly, the changes of active groups of coal samples at 50 鈩，

本文编号：2156729