煤自燃降温过程指标气体实验研究
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摘要
为了研究煤自燃降温过程中的指标气体,对实验煤样采用煤自燃及灭火模拟测试系统进行升温,并采取隔绝氧气的方式使煤样自然降温,通过对降温过程中不同指标的变化趋势分析,将煤样降温分为3个温度段,通过不同指标对温度进行系数和灰色关联度计算并进行比较发现,煤样降温过程中的指标气体与温度的相关性分析与灰色关联分析呈现出良好的对应关系。煤样降温过程中,在400～230℃和80～30℃温度段内,应以贝斯特龙系数为主要指标,在230～80℃温度段内,应以氧化碳比率为主要指标来判断火区状况。
In order to study the index gas in the process of coal spontaneous combustion and cooling, the experimental coal sample was heated by coal spontaneous combustion and fire extinguishing simulation test system, and the oxygen sample was naturally cooled to reduce the temperature of the coal sample. The coal sample cooling was divided into three temperature segments, the temperature coefficient and gray correlation degree were calculated and compared by different indexes. It was found that the correlation analysis and gray correlation analysis of the index gas and temperature in the coal sample cooling process showed good correspondence. During the cooling process of coal sample, the Beston coefficient should be used as the main index in the temperature range of 400～230 ℃ and 80～30 ℃. In the temperature range of 230～80 °C, the ratio of carbon oxide should be taken as the main index to judge the status of the fire zone.
In order to study the index gas in the process of coal spontaneous combustion and cooling, the experimental coal sample was heated by coal spontaneous combustion and fire extinguishing simulation test system, and the oxygen sample was naturally cooled to reduce the temperature of the coal sample. The coal sample cooling was divided into three temperature segments, the temperature coefficient and gray correlation degree were calculated and compared by different indexes. It was found that the correlation analysis and gray correlation analysis of the index gas and temperature in the coal sample cooling process showed good correspondence. During the cooling process of coal sample, the Beston coefficient should be used as the main index in the temperature range of 400～230 ℃ and 80～30 ℃. In the temperature range of 230～80 °C, the ratio of carbon oxide should be taken as the main index to judge the status of the fire zone.
引文
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[3]金永飞,仝玉轩,刘文永,等.煤自燃降温过程实验研究[J].煤矿安全,2017,48(4):36-39.
[4]赵彦辉,王栋,李波,等.煤程序降温实验研究[J].煤炭技术,2014,33(11):332-334.
[5]何敏.煤矿井下封闭火区的燃烧状态与气体分析研究[D].北京:中国矿业大学(北京),2013.
[6]邓存宝,王继仁,洪林.矿井封闭火区内气体运移规律[J].辽宁工程技术大学学报,2004(3):296-298.
[7]朱令起,郭立稳,周心权,等.密闭火区火源燃烧状态的综合判定[J].煤矿安全,2010,41(7):48-51.
[8]杨小强,李楠.煤矿封闭火区启封和复燃条件实验研究[J].煤矿安全,2010,41(9):4-7.
[9]王文文.小煤窑自燃采空区灭火过程中气体变化规律研究[D].太原:太原理工大学,2012.
[10]王福生,岳志新,郭立稳.煤炭自然发火标志气体的灰色关联分析[J].安全与环境学报,2006(S1):73-75.