Department of Mining and Architectural Engineering, Shenmu Vocational and Technical College
College of Safety Science and Engineering, Xi’an University of Science and Technology
Post-Doctoral Research Center of Mining Engineering, Xi’ an University of Science and Technology
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi’an University of Science and Technology

为探索凉水井煤自燃特征，采用程序升温与漫反射原位红外光谱试验，分析凉水井4-3煤层自燃过程中宏观气体与微观结构动态演变规律及相互作用关系。结果表明：凉水井煤自燃过程中临界温度为60℃,干裂温度为110℃,煤结构高温裂解的C2H6和C2H4气体可作为煤自燃高温阶段的预报性指标气体。通过特征温度下红外光谱，发现煤氧化过程中官能团的消耗与产生主要发生在脂肪烃、芳香烃以及含氧官能团吸收谱带，得出CH3、CH2、C-H、OH及C=O是煤氧化过程中最为活跃的官能团。采用动态灰色关联方法，计算出关键活跃的官能团CH3、CH2、C-H、OH及C=O与CO、CO2、C2H4及C2H6气体的动态关联度，阐明凉水井煤自燃释放气体受这5类官能团的共同影响，煤关联度最高的C=O键在煤自燃反应过程中具有非常重要的作用。

In order to explore the spontaneous combustion of coal in Liangshuijing, the dynamic evolution law and interaction between macroscopic gas and microscopic structure in the spontaneous combus-tion process of Liangshuijing 4- 3 coal seam were analyzed by temperature-programmed and diffuse re-flection in-situ infrared spectroscopy experiment. The results show that the critical temperature of coalduring spontaneous combustion is 60 ℃, and the dry cracking temperature is 110 ℃. The C2 H6 andC2H4 gases from the pyrolysis of coal structure can be used as the indicator gases for predicting thehigh temperature stage of spontaneous combustion. It is found that the consumption and production offunctional groups in the process of coal oxidation are mainly in the absorption bands of aliphatic hydro-carbon, aromatic hydrocarbon and oxygen-containing functional groups. It is concluded that CH3, CH2,C -H, OH and C =O are the most active functional groups in the process of coal oxidation. The dynamiccorrelation degree between the key active functional groups CH3, CH2, C -H, OH, C =O and CO, CO2,C2H4, C2H6 gases is calculated by using the dynamic grey correlation method. The results indicate thatthe gas released from coal spontaneous combustion in Liangshuijing is affected by these five functionalgroups. The C =O bond with the highest correlation degree plays a very important role in the spontane-ous combustion of coal.

国家自然科学基金青年项目(52204238)；陕西省自然科学基础研究计划青年项目(2022JQ-446)；陕西省教育厅青年创新团队科研计划项目(22JP046)；神木职业技术学院科学研究计划项目(2022ZK02)；

0 引 言
1 试验材料及方法
1.1 煤样工业分析
1.2 煤自燃程序升温试验
1.3 原位红外试验
2 试验结果分析
2.1 煤自燃宏观气体特性参数
2.1.1 碳氧气体释放特征
2.1.2 烃类气体释放特征
2.1.3 放热强度
2.2 煤自燃微观结构演变规律
2.2.1 煤自燃特征温度下红外光谱图
2.2.2 活性官能团转变分析
2.3 煤自燃气体与关键活性官能团的相关性
3 结 论

[1]白亚娥,马腾,任立峰,等.凉水井煤自燃关键活性基团氧化释放气体的试验[J].西安科技大学学报,2023,43(04):715-723.

BAI Ya’ e,MA Teng,REN Lifeng,et al.Oxidative release of gas by key active groups in spontaneous combustion of coal[ J].Journalof Xi’an University of Science and Technology,2023,43( 4):715-723.