某矿煤自燃程序升温实验研究
|
摘要
通过对某煤矿煤样的热重分析实验,对该煤矿煤样进行热重实验,分析实验结果,得出该煤矿煤样一系列特征温度。通过煤自燃程序升温实验得到了指标气体及其比值与温度的变化关系,因煤本身吸附烷烃量的不同和吸附烷烃释放时间的不同,CH_4浓度的变化及链烷比(C_2H_6/CH_4)比值变化较大,不宜选用CH_4和C_2H_6/CH_4作为该煤矿煤自燃预警指标。结合热重实验的特征温度、表征参数和程序升温的温度阶段、表征参数,分析汇总得到了煤自燃程序升温过程中的特征温度与其气体表征对应关系。
Through the thermogravimetric analysis experiment of a coal sample in a coal mine,the thermogravimetric experiment of the coal sample in the coal mine was carried out,and the experimental results were analyzed,and a series of characteristic temperatures of the coal sample in the coal mine were obtained.The relationship between the index gases and their ratios and temperature was obtained through the temperature programmed heating experiment of coal spontaneous combustion.Because of the difference of the amount of alkanes adsorbed by coal itself and the release time of alkanes adsorbed,the change of CH_4 concentration and the ratio of chain alkanes(C_2H_6/CH_4)changed greatly.CH_4 and C2H_6/CH_4 should not be selected as the early warning indicators of coal spontaneous combustion in this coal mine.Combining with the characteristic temperature,characterization parameters,temperature stage and characterization parameters of thermogravimetric experiments,the corresponding relationship between the characteristic temperature and gas characterization in the process of programmed temperature rise of coal spontaneous combustion was analyzed and summarized.
Through the thermogravimetric analysis experiment of a coal sample in a coal mine,the thermogravimetric experiment of the coal sample in the coal mine was carried out,and the experimental results were analyzed,and a series of characteristic temperatures of the coal sample in the coal mine were obtained.The relationship between the index gases and their ratios and temperature was obtained through the temperature programmed heating experiment of coal spontaneous combustion.Because of the difference of the amount of alkanes adsorbed by coal itself and the release time of alkanes adsorbed,the change of CH_4 concentration and the ratio of chain alkanes(C_2H_6/CH_4)changed greatly.CH_4 and C2H_6/CH_4 should not be selected as the early warning indicators of coal spontaneous combustion in this coal mine.Combining with the characteristic temperature,characterization parameters,temperature stage and characterization parameters of thermogravimetric experiments,the corresponding relationship between the characteristic temperature and gas characterization in the process of programmed temperature rise of coal spontaneous combustion was analyzed and summarized.
引文
[1]梁运涛.煤炭自然发火预测预报的气体指标法[J].煤炭科学技术,2015,36(6):5-8.
[2]蒋春林,杨胜强,宋万新,等.煤氧化过程中指标性气体的确定[J].煤矿安全,2017(10):185-187,191.
[3]彭伟,何启林,葛新玉.煤炭自燃指标性气体确定的实验研究[J].中国安全生产科学技术,2017,6(6):140-144.
[4]朱令起,周心权,谢建国,等.自然发火标志气体实验分析及优化选择[J].采矿与安全工程学报,2016,25(4):440-443.
[5]崔洪义,王振平,王洪权.煤层自然发火早期预报技术及其应用[J].煤矿安全,2015(10):16-18.
[6]杨宏民,罗海珠.利用气味检测法预测预报煤矿火灾[J].煤炭科学技术,2016,30(12):6-9.
[7]杨宏民,罗海珠.仿生气味传感器阵列判识煤矿火灾的实验研究[J].煤炭学报,2017,32(8):822-826.
[2]蒋春林,杨胜强,宋万新,等.煤氧化过程中指标性气体的确定[J].煤矿安全,2017(10):185-187,191.
[3]彭伟,何启林,葛新玉.煤炭自燃指标性气体确定的实验研究[J].中国安全生产科学技术,2017,6(6):140-144.
[4]朱令起,周心权,谢建国,等.自然发火标志气体实验分析及优化选择[J].采矿与安全工程学报,2016,25(4):440-443.
[5]崔洪义,王振平,王洪权.煤层自然发火早期预报技术及其应用[J].煤矿安全,2015(10):16-18.
[6]杨宏民,罗海珠.利用气味检测法预测预报煤矿火灾[J].煤炭科学技术,2016,30(12):6-9.
[7]杨宏民,罗海珠.仿生气味传感器阵列判识煤矿火灾的实验研究[J].煤炭学报,2017,32(8):822-826.