准东大井矿区主采煤层自燃氧化特性试验研究

发布时间：2018-03-20 15:20

本文选题：准东矿区　切入点：自燃氧化特性　出处：《中国矿业》2017年01期 　论文类型：期刊论文

【摘要】：采用程序升温氧化试验装置对准东大井矿区主采Bm煤层进行了氧化特性试验。研究了其不同粒径煤样自燃临界温度TC、CO初始温度、格雷哈姆指数及CO、O2随温度的变化和其它CnHm气体初始温度。试验表明:在该试验条件下,CO初始温度随煤样粒径的减小而增加,平均CO初始温度为66.37℃;随煤样粒径减小,临界温度有所增加,平均临界温度为154.73℃;Ta-TCO段平均耗氧速率为0.2454mL/min·℃-1,TCO-Tb段平均耗氧速率为4.0049 mL/min·℃-1;随氧化进程继续(即TCO-Tb段),80~100目粒径煤样温度耗氧速率高于120~140目、160~180目粒径煤样耗氧速率,表明该阶段其反应活性大于其他粒径实验煤样反应活性;70~100℃范围内实验煤样R3较R1、R2表征作用更明显;根据氧化特性实验数据,可将CO、温度、O2浓度、格雷哈姆指数R3及C2H4、C2H6、C3H8作为矿井防灭火监测指标指导采场煤自燃火灾防治。
[Abstract]:Heating and oxidation test device of Zhundong coalfield oi Bm coal seam oxidation experiments using the program. Research the different particle size of coal spontaneous combustion in the critical temperature TC CO, initial temperature, Graham index and CO, the initial O2 changes with temperature and other CnHm gas temperature. The experimental results show that under the experimental conditions, CO the initial temperature of coal particle size decreases with the increase of initial temperature, the average CO is 66.37 DEG C; with the coal particle size decreases, the critical temperature increases, the average critical temperature of 154.73 DEG Ta-TCO; average oxygen consumption rate is 0.2454mL/min / C -1, TCO-Tb average rate of oxygen consumption was 4.0049 mL/min C -1; with the oxidation process continues (TCO-Tb section), 80~100 mesh particle size of coal sample temperature oxygen consumption rate is higher than that of 120~140 mesh, 160~180 mesh particle size of coal oxygen consumption rate, which showed that the activity of the stage than the other particle size experimental coal sample reaction activity; 70~100 C fan In the surrounding experiment, the R3 of coal sample is more obvious than that of R1 and R2. According to the experimental data of oxidation characteristics, CO, temperature, O2 concentration, Graham index R3 and C2H4, C2H6 and C3H8 can be used as mine fire prevention and monitoring indicators to guide the prevention and control of coal spontaneous combustion.

【作者单位】：新疆大学干旱生态环境研究所;新疆大学资源与环境科学学院;新疆自治区煤炭科学研究所;
【基金】：国家自然科学基金项目资助(编号:51374182);国家自然科学基金项目资助(编号:51164032) 新疆自然科学基金项目资助(编号:2014211A051) 中国博士后科学基金项目资助(编号:2013M542411)
【分类号】：TD752.2

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