ORIGINAL RESEARCH article
Front. Therm. Eng.
Sec. Thermal Behavior of Materials & Structures
Study on Spontaneous Combustion Prevention of Close Distance Coal Seam Group Combined Fully Mechanized Caving Face
Provisionally accepted
- China Coal Technology and Engineering Group Corp Chongqing Research Institute, Chongqing, China
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The proximity of the coal seam extraction area to air leakage poses a significant risk of spontaneous combustion accidents. This study employs a heating oxidation experimental method to investigate the spontaneous combustion characteristics of coal seams. It identifies the minimum spontaneous ignition period as 3 to 6 months and establishes carbon monoxide (CO) as a key indicator for predicting ignition risk and critical thresholds. Additionally, FLUENT numerical simulation software is utilized to model the distribution of the three zones of spontaneous combustion in the extraction area: the heat dissipation zone, the combustion zone, and the extinguishing zone. Based on this model, simulations are conducted to analyze the distribution of air leakage intensity under varying airflow rates, examining how changes in airflow affect the three combustion zones. This leads to the identification of key areas for preventing spontaneous combustion in the Xinyu coal mine and ultimately establishes prevention and control technologies tailored to different mining periods.
Keywords: Close distance coal seam group, Combined mining, Comprehensive prevention and control technology, numerical simulation, Three zones of spontaneouscombustion
Received: 10 Dec 2025; Accepted: 21 Jan 2026.
Copyright: © 2026 Mei. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Yong Mei
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