CO_2-N_2赋存煤层综放工作面多参量变化趋势及相关性
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摘要
为弄清CO2-N2赋存煤层采煤工作面CO来源和风流温度,CH4、O2和CO浓度的变化趋势及相互影响,选取不连沟煤矿F6103综放工作面为研究对象,对包括风流温度,CH4、O2和CO浓度连续进行了35 d的观测。综合运用最小二乘法、数理统计法和Matlab工具对观测数据进行处理和分析。结果表明,沿F6103综放工作面全线布点的2、3、4、5、6处风流温度,CO和CH4浓度基本上是随距进风巷距离增大而增大,峰值多出现在回风端头测点6。回风隅角测点8处风流温度,CO和CH4浓度在历时35 d的观测中基本上与时间成4次多项式变化。通过自相关系数计算可知,测点6和8处CO浓度分别与其测点处O2浓度呈负相关关系,与温度和CH4浓度呈正相关关系。通过比相关系数计算可知,测点5和8处CO浓度和温度分别与测点6处O2浓度呈负相关关系,与测点6处CO、CH4浓度和温度呈正相关关系;测点5和8处CH4浓度分别与测点6处O2浓度和温度呈负相关关系,与测点6处CO、CH4浓度呈正相关关系。CO来源主要由3个方面构成,分别是井下柴油车运行释放的CO,大功率割煤机和煤体相遇瞬时高温氧化产生的CO和破碎煤体与氧的复合氧化产生的CO。
The mechanized mining face of F6103 in Buliangou Coal Mine was selected to make clear the source of CO and investigate the variation trend and correlation of the airflow temperature,the concentration of CH4,O2 and CO.First the parameters were observed and recorded in thirty-five consecutive days.Second these observational data were handled and analyzed by Matlab on the basis of the least square method and the mathematical statistical method.The analysis results show that the airflow temperature,the concentration of CH4 and CO of the gauging point of 2,3,4,5 and 6 along the working face gradually increase with the increase of the distance from the intake airway.The peak values of every parameter always appear the gauging point of 6 of the return airway.The airflow temperature,the concentration of CH4 and CO of the gauging point of 8 of the return corner varies with quartic polynomial of the observation time during the thirty-five consecutive days.By calculating the own correlation coefficient among these parameters of the gauging point of 6 and 8.It can be known that CO of each gauging point of 6 and 8 is negative correlation with O2 respectively.But CO of each gauging point of 6 and 8 is positive correlation with the airflow temperature and CH4 respectively.By calculating the ratio correlation coefficient between the parameters of the gauging point of 5 and 8 comparing to the gauging point of 6,it can be known that CO of the gauging point of 5 and 8 is negative correlation with O2 of the gauging point of 6.CO of each gauging point of 5 and 8 is positive correlation with the airflow temperature,CH4 and CO of the gauging point of 6.CH4 of each gauging point of 5 and 8 is negative correlation with the airflow temperature and O2 of the gauging point of 6.CH4 of each gauging point of 5 and 8 is positive correlation with the CH4 and CO of the gauging point of 6.The source of CO is consisted of three components.They are respectively the releasing during operation of the underground diesel locomotives,the transient high temperature oxidation when coal cutting machine cuts the hard coal and the eremacausis between the fragmentized coal and oxygen.
The mechanized mining face of F6103 in Buliangou Coal Mine was selected to make clear the source of CO and investigate the variation trend and correlation of the airflow temperature,the concentration of CH4,O2 and CO.First the parameters were observed and recorded in thirty-five consecutive days.Second these observational data were handled and analyzed by Matlab on the basis of the least square method and the mathematical statistical method.The analysis results show that the airflow temperature,the concentration of CH4 and CO of the gauging point of 2,3,4,5 and 6 along the working face gradually increase with the increase of the distance from the intake airway.The peak values of every parameter always appear the gauging point of 6 of the return airway.The airflow temperature,the concentration of CH4 and CO of the gauging point of 8 of the return corner varies with quartic polynomial of the observation time during the thirty-five consecutive days.By calculating the own correlation coefficient among these parameters of the gauging point of 6 and 8.It can be known that CO of each gauging point of 6 and 8 is negative correlation with O2 respectively.But CO of each gauging point of 6 and 8 is positive correlation with the airflow temperature and CH4 respectively.By calculating the ratio correlation coefficient between the parameters of the gauging point of 5 and 8 comparing to the gauging point of 6,it can be known that CO of the gauging point of 5 and 8 is negative correlation with O2 of the gauging point of 6.CO of each gauging point of 5 and 8 is positive correlation with the airflow temperature,CH4 and CO of the gauging point of 6.CH4 of each gauging point of 5 and 8 is negative correlation with the airflow temperature and O2 of the gauging point of 6.CH4 of each gauging point of 5 and 8 is positive correlation with the CH4 and CO of the gauging point of 6.The source of CO is consisted of three components.They are respectively the releasing during operation of the underground diesel locomotives,the transient high temperature oxidation when coal cutting machine cuts the hard coal and the eremacausis between the fragmentized coal and oxygen.
引文
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[14]李增华.煤炭自燃的自由基反应机理[J].中国矿业大学学报,1996,25(3):111-114.Li Zenghua.Mechanism of free radical reactions in spontaneouscombustion of coal[J].Journal of China University of Mining&Technology,1996,25(3):111-114.
[15]葛岭梅,薛韩玲,徐精彩,等.对煤分子中活性基团氧化机理的分析[J].煤炭转化,2001,24(3):23-28.Ge Lingmei,Xue Hanling,Xu Jingcai,et al.Study on the oxidationmechanism of active groups of coal[J].Coal Conversion,2001,24(3):23-28.
[2]郭立稳,肖藏岩,刘永新.煤孔隙结构对煤层中CO扩散的影响[J].中国矿业大学学报,2007,36(5):636-640.Guo Liwen,Xiao Cangyan,Liu Yongxin.Effect of coal pore structureon the CO proliferation[J].Journal of China University of Mining&Technology,2007,36(5):636-640.
[3]张九零,郭立稳,周心权,等.惰质组与镜质组对煤吸附CO性能的影响[J].煤炭学报,2007,32(12):1 297-1 300.Zhang Jiuling,Guo Liwen,Zhou Xinquan,et al.Effect of inertiniteand vitrinite of coal samples on carbon monoxide absorption by coalseams[J].Journal of China Coal Society,2007,32(12):1 297-1 300.
[4]魏国栋.煤层里伴生CO[J].内蒙古煤炭经济,2000(4):75-76.Wei Guodong.Analysis of source of CO associated with coal seam[J].Coal Economic of Inner Mongolia,2000(4):75-76.
[5]许继宗,李信,王步青,等.大水头煤矿原生CO含量及赋存规律的研究[J].矿业安全与环保,2004,31(2):18-20.Xu Jizong,Li Xin,Wang Buqing,et al.Research on the content ofCO and distribution law in Dashuitou Coalmine[J].Mining Safetyand Environmental Protection,2004,31(2):18-20.
[6]杨广文,艾兴.大雁二矿250综采工作面CO来源的分析及治理[J].煤炭安全,2003,34(10):41-43.Yang Guangwen,Ai Xing.Analysis of source of CO and preventionon the fully mechanized mining face of 250 in Dayang secondcoalmine[J].Safety in Coal Mines,2003,34(10):41-43.
[7]余明高,常绪华,贾海林,等.基于MATLAB采空区自燃“三带”的分析研究[J].煤炭学报,2010,35(4):600-604.Yu Minggao,Chang Xuhua,Jia Hailin,et al.Analysis of spontaneouscombustion“three-zone”in goaf based on Matlab[J].Journal ofChina Coal Society,2010,35(4):600-604.
[8]欧阳联华,王家林.一种在等值线图上任意截取剖面的Matlab语言算法[J].物探化探计算技术,2003,25(3):273-276.Ouyang Lianhua,Wang Jialin.Matlab algorithm for slicing profilesfrom the contour map[J].Computing Techniques for Geophysicaland Geochemical Exploration,2003,25(3):273-276.
[9]司少玲,关永.三角函数曲线数据拟合最佳次数的确定[J].计算机工程与设计,2006,27(24):4 660-4 662.Si Shaoling,Guan Yong.Determination of optimal power of data fit-ting to characteristic curve of trigonometric function[J].ComputerEngineering and Design,2006,27(24):4 660-4 662.
[10]余明高,常绪华,贾海林,等.基于最小二乘法的高抽巷CO浓度变化规律分析[J].防灾减灾工程学报,2010,30(2):190-195.Yu Minggao,Chang Xuhua,Jia Hailin,et al.Study on the changelaw of CO concentration in the high drainage tunnel based on theleast squares method[J].Journal of Disaster Prevention and Mitiga-tion Engineering,2010,30(2):190-195.
[11]孙荣恒,伊亨云,刘琼荪,等.概率论与数理统计[M].重庆:重庆大学出版社,2000.
[12]魏引尚,王蓬.基于数理统计的采空区自燃特性研究[J].安全与环境学报,2008,8(4):127-130.Wei Yinshang,Wang Peng.Statistics study on the goaf spontaneouscombustion characteristics[J].Journal of Safety and Environment,2008,8(4):127-130.
[13]邓明德,耿乃光,崔承禹,等.岩石应力状态改变引起岩石热状态改变的研究[J].中国地震,1997,13(2):179-185.Deng Mingde,Geng Naiguang,Cui Chengyu,et al.Study on the var-iation of thermal state of rocks caused by the variation of stress stateof rocks[J].Earthquake Research in China,1997,13(2):179-185.
[14]李增华.煤炭自燃的自由基反应机理[J].中国矿业大学学报,1996,25(3):111-114.Li Zenghua.Mechanism of free radical reactions in spontaneouscombustion of coal[J].Journal of China University of Mining&Technology,1996,25(3):111-114.
[15]葛岭梅,薛韩玲,徐精彩,等.对煤分子中活性基团氧化机理的分析[J].煤炭转化,2001,24(3):23-28.Ge Lingmei,Xue Hanling,Xu Jingcai,et al.Study on the oxidationmechanism of active groups of coal[J].Coal Conversion,2001,24(3):23-28.
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