国兴煤矿9#煤层工作面立体空间自然发火标志气体及其分级指标值研究  

Research on the Natural Ignition Marker Gas in Three-dimensional Space and Its Grading Index Value in the Working Face of 9#Coal Seam in Guoxing Coal Mine

作　　者：刘刚 弓疆 Liu Gang;Gong Jiang(Shanxi Shuozhou Pinglu District Guoxing Coal Industry Co.,Ltd.,Shanxi,036000)

机构地区：[1]山西朔州平鲁区国兴煤业有限公司,山西036000

出　　处：《当代化工研究》2025年第1期73-76,共4页Modern Chemical Research

摘　　要：煤氧化热灾害严重影响煤矿安全生产。以国兴煤矿9#煤层591107回采工作面为研究对象,采用煤自然发火气体产物试验装置对其标志性气体进行了实验研究,分析了煤氧热燃烧气体含量与温度的对应关系,优选并提出了自然发火标志气体的临界温度值,揭示了工作面立体空间内标志气体的分级指标值。结果表明,该煤层标志气体的临界温度值为Ts-CO为50℃,Ts-C_(2)H_(4)为100℃,Ts_C2H2大于243.9℃;CO产生率的预警值与临界值分别为0.98 cm^(3)(m^(3)·min)^(-1)、2.24 cm^(3)(m^(3)·min)^(-1)。工作面回风隅角CO体积分数的预警值与临界值分别为27.39×10^(-4)%、67.98×10^(-4)%;回风流CO体积分数的预警值与临界值分别为4.38×10^(-4)%、10.88×10^(-4)%;散热带的预警值与临界值分别为32.03×10^(-4)%、79.51×10^(-4)%,氧化带CO体积分数的预警值与临界值分别为35.11×10^(-4)%、87.15×10^(-4)%。该研究结论对预防煤自燃具有指导意义。Coal oxidation thermal disasters seriously affect the safe production of coal mines.The 591107 mining face of the 9#coal seam in Guoxing Coal Mine was taken as the research object.The coal spontaneous combustion gas product test device was used to experimentally study its characteristic gas,and the corresponding relationship between the coal oxygen thermal combustion gas content and temperature was analyzed.The critical temperature value of the spontaneous combustion characteristic gas was optimized and proposed,and the classification index value of the characteristic gas in the three-dimensional space of the working face was revealed.The results show that the critical temperature value of the charac-teristic gas of this coal seam is 50℃for Ts-CO,100℃for Ts-C_(2)H_(4),and greater than 243.9℃for Ts-C2H2.The warning value and critical value of CO generation rate are 0.98 cm^(3)(m^(3)·min)-1 and 2.24 cm^(3)(m^(3)·min)^(-1)respectively.The warning value and critical value of CO volume fraction in the return air corner of the working face are 27.39×10^(-4)%and 67.98×10^(-4)%respectively.The warning value and critical value of CO volume fraction in the re-turn air flow are 4.38×10^(-4)%and 10.88×10^(-4)%respectively.The warning value and critical value of CO volume fraction in the heat dissipation zone are 32.03×10^(-4)%and 79.51×10^(-4)%respectively.The warning value and critical value of CO volume fraction in the oxidation zone are 35.11×10^(-4)%and 87.15×10^(-4)%respectively.The research conclusion has guiding significance for preventing coal spontaneous combustion.

关 键 词：自燃煤层 煤自燃 标志性气体 分级指标值 

分 类 号：TD[矿业工程]