Fidelity of evaluation criteria for spontaneous combustion liability of coal from Pechora and Kuznetsk fields

The article investigates whether the evaluation criteria of spontaneous combustion liability determined for the Pechora field coal are applicable to the Kuznetsk field coal. The investigation used the method proposed for determining spontaneous combustion liability of coal based on the experimental relations of coal mass variation and the mass variation rate obtained from the thermogravimetric analysis in the temperature domain intrinsic for the process of oxidation and oxygen sorption. The analysis of the Pechora coal samples reveals some differences in the behavior of coal liable and nor liable to spontaneous combustion in heating. The studies of the Kuznetsk field coal liable to spontaneous combustion shows that the criteria of coal liability to spontaneous combustion (increase in coal mass in oxidation and oxygen sorption start temperature), obtained from the thermogravimetric analysis, enable detection of coal liable to spontaneous combustion in the conditions of both Vorkuta and Kuznetsk fields. The additional criteria may the values of self-heating and inflammation temperatures of coal. The proposed method of coal categorization with respect to spontaneous combustion liability differs from the common method in Russia by operativeness and reliability in determining parameters required for evaluation spontaneous combustion liability of coal. The research findings can be used in the fast determination of spontaneous combustion liability of coal during mining, handling and storage, as well as in the ore mining at a close space from coal seams featuring high risk of spontaneous combustion.

Keywords: spontaneous coal combustion, thermogravimetric analysis, mass increase, coal oxidation, oxygen sorption, mass variation rate, self-heating temperature, bituminous coal.
For citation:

Zakharov V. N., Dokuchaeva A. I., Malinnikova O. N. Fidelity of evaluation criteria for spontaneous combustion liability of coal from Pechora and Kuznetsk fields. MIAB. Mining Inf. Anal. Bull. 2023;(12):5-15. [In Russ]. DOI: 10.25018/0236_1493_2023_12_0_5.

Acknowledgements:

The studies were carried out in the framework of Act No. 1 of the Integrated Full-Cycle Innovation R&D Program approved by the Russian Federation Government, Decree No. 1144-r dated 11 May 2022, and were supported in accordance with § 4 of Article 78.1 of the RF Budget Code, Agreement No. 075-15-2022-1185 dated 28 September 2022.

Issue number: 12
Year: 2023
Page number: 5-15
ISBN: 0236-1493
UDK: 622.272
DOI: 10.25018/0236_1493_2023_12_0_5
Article receipt date: 01.10.2023
Date of review receipt: 20.10.2023
Date of the editorial board′s decision on the article′s publishing: 10.11.2023
About authors:

V.N. Zakharov1, Dr. Sci. (Eng.), Аcademician of Russian Academy of Sciences, Director of the Institute, e-mail: val_zakharov@ipkonran.ru, ORCID ID: 0000-0002-5056-3296,
A.I. Dokuchaeva1, Junior Researcher, e-mail: ana-anastasia2015@yandex.ru,
O.N. Malinnikova1, Dr. Sci. (Eng.), Chief Researcher, e-mail: olga_malinnikova@mail.ru, ORCID ID: 0000-0003-2428-2228,
1 Institute of Problems of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences, 111020, Moscow, Russia.

 

For contacts:

A.I. Dokuchaeva, e-mail: ana-anastasia2015@yandex.ru.

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