Reference Test Method for Calculating the Thermal Effect of Coal Spontaneous Combustion

Wenyong Liu, Wenzhao Zhang (), Shuai Ma and Ze Zhang
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Wenyong Liu: College of Safety and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
Wenzhao Zhang: Xi’an Tianhe Mining Technology Co., Ltd., Xi’an 710054, China
Shuai Ma: College of Safety and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
Ze Zhang: Xi’an Tianhe Mining Technology Co., Ltd., Xi’an 710054, China

Energies, 2022, vol. 15, issue 20, 1-13

Abstract: During a heating experiment, there are two sources of heat that increase the temperature of a coal sample: the heat released by the oxidation reaction of the coal itself, and the heat provided by the experimental system. Here, we propose a method for measuring the thermal effect of oxidation and self-ignition through a reference experiment conducted with a material that is physically similar to coal but does not combust. The reference material used was an aggregate of alumina, fly ash, and concrete, and experiments were conducted on both materials simultaneously. The temperature of the coal sample was obtained under self-heating conditions, and compared with that of the non-combusting material. The relationship of temperature as a function of time for both materials was determined from the data, the comparison of which allowed for the thermal effect of oxidation and coal spontaneous combustion (CSC) to be calculated. The reliability of the thermal effect data obtained by the experiment was verified by chemical bond energy estimation. These results provide theoretical guidance for on-site fire prevention and extinguishing in coal mines, and are important for the further development of the understanding of CSC.

Keywords: coal spontaneous combustion; oxidation heat effect; physical similarity reference test; positive temperature difference leading; heating rate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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