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作 者:赵兴国 秦汝祥[1,2] 刘泽功[1] 戴广龙[1] ZHAO Xingguo;QIN Ruxiang;LIU Zegong;DAI Guanglong(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining,Anhui University of Science and Technology,Huainan 232001,China)
机构地区:[1]安徽理工大学安全科学与工程学院,安徽淮南232001 [2]安徽理工大学煤炭安全精准开采国家地方联合工程中心,安徽淮南232001
出 处:《煤矿安全》2022年第9期137-143,共7页Safety in Coal Mines
基 金:国家自然科学基金资助项目(51874007)。
摘 要:针对羊场湾煤矿160205工作面CO气体异常及来源类型不清的问题,通过煤体深层钻孔测试、采空区温度与CO分布测试、工作面CO分布测试、煤的破碎实验、程序升温实验以及常温氧化实验综合分析工作面CO的来源。结果表明:羊场湾2#煤原始煤层中不含CO气体;煤在氮气氛围和空气氛围环境中破碎均能生成CO气体,并且随着破碎时间的延长产生的CO气体量呈现上升趋势;采空区遗煤温度低于50℃,工作面CO主要来源于采空区遗煤的低温氧化以及架后、工作面煤的常温氧化,其次为采煤过程中煤机切割破煤作业产生的CO气体。Aiming at the problem of abnormal CO gas and unclear source type in 160205 working face of Yangchangwan Coal Mine, the source of CO gas in working face was comprehensively analyzed through borehole test in deep coal body, temperature and CO distribution test in goaf, CO distribution test in working face, coal crushing experiment, temperature programmed experiment and normal temperature oxidation experiment. The results show that there is no CO gas in the original seam of Yangchangwan 2#coal. Coal crushing in nitrogen atmosphere and air atmosphere can generate CO gas, and with the extension of crushing time, the amount of CO gas produced presents a rising trend. When the residual coal temperature in goaf is lower than50 ℃, CO in working face mainly comes from low temperature oxidation of residual coal in goaf and normal temperature oxidation of coal behind frame and working face, followed by CO gas generated by coal machine cutting and breaking operation in coal mining process.
关 键 词:CO来源 易自燃煤 综放工作面 煤的低温氧化 采空区遗煤
分 类 号:TD752.2[矿业工程—矿井通风与安全]
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