Study on the resistance and slow release characteristics of tracer materials for coal spontaneous combustion in Mined areas

IF 7.8 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2026-08-01 Epub Date: 2026-02-05 DOI:10.1016/j.fuel.2026.138651

Xiangming Hu , Haibo Hong , Yanyang Zhao , Siyu Niu , Biao Kong , Mingyang Zou , Guoqing Zhang , Liang Qiao , Hao Dong , Shenghe Chen , Qiangqiang Liang

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引用次数: 0

Abstract

To overcome the precision bottlenecks in locating concealed coal fires, a novel dual-network tracer material was developed by integrating a water glass/sodium carboxymethyl cellulose (WG/C) composite gel with molecular sieve-immobilized heptafluorocyclopentane (F7A). Optimized via response surface methodology, the material possesses a uniform dual-network porous structure that ensures high loading efficiency and stable tracer distribution. TG-DSC and FTIR analysis demonstrated superior inhibition performance: characteristic temperatures (T₁–T_m) of treated coal were delayed by up to 29.62 °C, with a 25.64% reduction in total heat release and an 8.6% decrease in aliphatic chain intensity. Sustained-release experiments identified a precise thermal response at 65 °C, with maximum F7A release reaching 16.37 mg/g at 75 °C. Large-scale simulations further confirmed that the material significantly suppresses indicator gases (CO, C₂H₄, C₂H₆) and delays the crossing point temperature by 26 °C and 25.5 min. Field-scale validation corroborated these release patterns, confirming the material’s feasibility for precise fire source localization through targeted thermal responses in complex goaf environments. This multifunctional material integrates “monitoring, localization, and suppression,” providing a high-precision and cost-effective technical approach for the prevention and control of coal spontaneous combustion disasters.

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矿区煤自燃示踪材料的阻缓特性研究

为了克服隐蔽煤火定位的精度瓶颈，将水玻璃/羧甲基纤维素钠（WG/C）复合凝胶与分子筛固定化七氟环戊烷（F7A）相结合，研制了一种新型双网示踪材料。通过响应面法优化，该材料具有均匀的双网络多孔结构，确保了高加载效率和稳定的示踪剂分布。TG-DSC和FTIR分析显示了优异的抑制性能：处理后的煤的特征温度（T1-Tm）延迟了29.62℃，总放热减少了25.64%，脂肪链强度降低了8.6%。在65℃时，F7A的释放量达到16.37 mg/g。大规模模拟进一步证实，该材料显著抑制了指示气体（CO, C2H4, C2H6），并将交叉点温度延迟了26°C和25.5 min。现场规模验证证实了这些释放模式，证实了该材料在复杂采空区环境中通过有针对性的热响应精确定位火源的可行性。这种多功能材料集“监测、定位、抑制”于一体，为煤炭自燃灾害的防治提供了高精度、高性价比的技术途径。

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.