【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。更多还原

【Abstract】 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.更多还原