Investigating the Methodology for Identifying High-Temperature Zones within Porous Coal Masses via Thermal Conductivity Analysis.

Mine coal spontaneous combustion is one of the five major natural disasters in coal mines, and determining the concealed fire source locations of coal spontaneous combustion is key to solving the problem. This paper determines the thermal conductivity of coal samples through a spherical heat conduction model, and based on experimental data, analyzes the fitting relationship between thermal conductivity and heating voltage, the outer wall temperature of the inner sphere, and the location of high-temperature points under different voltage conditions. The study concludes that there is a linear relationship between thermal conductivity and both heating voltage and outer wall temperature, with a correlation coefficient greater than 0.9. In ideal conditions, the highest temperature is located at the center of the flat wall of the spherical heat conduction model. This re-search provides a mathematical basis for the prevention and control of mine coal spontaneous combustion fires. [ABSTRACT FROM AUTHOR]