煤自燃阶段性预测预报临界指标实验研究
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摘要
以杭来湾煤矿3~#煤层为研究对象,采用煤自燃程序升温与色谱分析联用实验系统,对不同粒度的煤样进行氧化升温实验,测算了耗氧速率、气体产生率及放热强度等煤自燃特征参数,确定了划分煤自燃缓慢、加速及剧烈氧化阶段的临界温度值,优选了不同氧化阶段的指标气体及其临界范围,得到了C_(CO)/C_(CO_2)与Δ_(CO)/Δ_(O_2)为煤自燃进入加速氧化与剧烈氧化的临界判别指标,为杭来湾煤矿3~#煤层自燃的分级预警及科学防控提供了理论依据。
3~# coal seam in Hanglaiwan coal mine was studied. The temperature programmed and chromatography experiments were carried out to test the characteristic parameters of oxygen consumption rate, gas generation rate and heat release intensity of coal spontaneous combustion. The results showed that the critical temperatures of coal spontaneous combustion were determined,which divided the coal oxidation process into three stages,slow oxidation, accelerated oxidation and severe oxidation stages.The index gas and its critical value of different oxidation stages were analyzed. The values of C_(CO)/C_(CO_2) and Δ_(CO)/Δ_(O_2) were identified for prediction of the accelerated oxidation and severe oxidation stages of coal spontaneous combustion,which provided theoretical basis for classified early-warning and scientific prevention of 3~# coal seam spontaneous combustion in Hanglaiwan coal mine.
3~# coal seam in Hanglaiwan coal mine was studied. The temperature programmed and chromatography experiments were carried out to test the characteristic parameters of oxygen consumption rate, gas generation rate and heat release intensity of coal spontaneous combustion. The results showed that the critical temperatures of coal spontaneous combustion were determined,which divided the coal oxidation process into three stages,slow oxidation, accelerated oxidation and severe oxidation stages.The index gas and its critical value of different oxidation stages were analyzed. The values of C_(CO)/C_(CO_2) and Δ_(CO)/Δ_(O_2) were identified for prediction of the accelerated oxidation and severe oxidation stages of coal spontaneous combustion,which provided theoretical basis for classified early-warning and scientific prevention of 3~# coal seam spontaneous combustion in Hanglaiwan coal mine.
引文
[1]屈丽娜,刘星魁,张红元.煤自燃阶段动力学参数及特征温度点的实验研究[J].西安科技大学学报,2015,35(5):597-601.
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[7]邓军,马蓉,王秋红,等.变氧浓度条件下煤自燃特性参数实验测试[J].煤炭技术,2014,33(11):4-7.
[2]谭波,胡瑞丽,高鹏,等.煤自燃灾害气体指标的阶段特征试验研究[J]中国安全科学学报,2013,23(2):51-57.
[3]王娅,王俊峰,邬剑明,等.低阶煤自燃指标气体与氧化特征温度实验研究[J].煤炭技术,2017,36(3):207-209.
[4]辛程鹏,刘义磊.煤自燃预测预报指标性气体实验研究[J].煤炭技术,2015,34(8):145-148.
[5]邓军,肖旸,张辛亥,等.煤火灾害防治技术的研究与应用[J].煤矿安全,2012,43(S1):58-61.
[6]邓军,李贝,李珍宝,等.预报煤自燃的气体指标优选试验研究[J].煤炭科学技术,2014,42(1):55-59,79.
[7]邓军,马蓉,王秋红,等.变氧浓度条件下煤自燃特性参数实验测试[J].煤炭技术,2014,33(11):4-7.