SAFETY
Original Paper
UDC 622.271 © V.B. Popov, Lee Hee Un, O.V. Tailakov, V.V. Sobolev, S.N. Kravchenko, 2022
ISSN 0041-5790 (Print) • ISSN 2412-8333 (Online) • Ugol’ – Russian Coal Journal, 2022, № 7, pp. 56-59
DOI: http://dx.doi.org/10.18796/0041-5790-2022-7-56-59
Title
ASSESSMENT OF ENDOGENOUS FIRE HAZARD OF EXCAVATION AREAS
Authors
Popov V.B.1, Lee Hee Un1, Tailakov O.V.1, 2, Sobolev V.V.1, Kravchenko S.N.3
1"Scientific Centre " VostNII" JSC, Kemerovo, 650002, Russian Federation
2Institute of Coal of SB RAS Kemerovo Science Center, Kemerovo, 650065, Russian
3"Scientific Research Institute of Mine Rescue" JSC, Sukhovo village, 650517, Russian Federation
Authors Information
Popov V.B., Doctor of Engineering Sciences, Professor, Scientific consultant, e–mail: 1860pwb@mail<st1< a="">:personname >.ru
Lee Hee Un, Doctor of Engineering Sciences, Professor, Scientific secretary, e–mail: leeanatoly@mail.ru
Tailakov O.V., Doctor of Engineering Sciences, Professor, General Director, Head of the laboratory,e–mail: tailakov@nc-vostnii<st1< a="">:personname >.ru
Sobolev V.V., Doctor of Engineering Sciences, Deputy General Director, e–mail: Sobolev567@gmail<st1< a="">:personname >.com
Kravchenko S.N., General Director, е–mail: ggo1959@mail.ru
Abstract
The article considers the conditions for the emergence and development of the process of self-combustion of coal in the worked-out spaces of mining sections of mines. It is noted that oxidative processes can occur even in small concentrated masses of 3-5 tons of coal, almost always remaining in spent zones. However, in these circumstances, endogenous fires do not occur everywhere, but only in certain cases. This is due to the fact that the process of spontaneous combustion can develop only at a certain rate of heating of coal, depending on its chemical activity, the magnitude and duration of air inflow. It is shown that the transition of the process from the stage of intensive oxidation to ignition is possible only with a certain ratio of heat generated due to the oxidative reaction occurring to the accumulated in the coal cluster. The intensity of the development of the process of self-combustion of the coal cluster indicates the level of potential danger of its transition to the stage of active combustion, and therefore the endogenous fire hazard of the excavation areas should be determined by the parameters that cause the transition of the process from the stage of intensive oxidation to the stage of coal ignition.
Based on the conducted experimental and analytical studies, a complex indicator «R» was established and an empirical calculation formula was obtained to determine its numerical values. The constants included in the obtained equation for coals of different degrees of metamorphism and chemical activity are calculated.
With the use of these developments, it is possible to timely identify the danger of the occurrence of centers of spontaneous coal combustion and take prompt preventive measures to prevent the occurrence of endogenous fires.
Keywords
Coal, formation, Metamorphism, Extraction area, Oxidizing process, Spontaneous combustion, Endogenous fire hazard.
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For citation
Popov V.B., Lee Hee Un, Tailakov O.V., Sobolev V.V. & Kravchenko S.N. Assessment of endogenous fire hazard of excavation areas. Ugol’, 2022, (7), pp. 56-59. (In Russ.). DOI: 10.18796/0041-5790-2022-7-56-59.
Paper info
Received April 7, 2022
Reviewed May 11, 2022
Accepted June 23, 2022
