Dynamics of dust explosion hazard indicators under physico and chemical effects on coal substance
- Authors: Romanchenko S.B.1, Gubina Е.A.2, Vdovina V.V.1, Naganovskiy Y.K.1
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Affiliations:
- All-Russian Research Institute for Fire Protection (VNIIPO), the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters (EMERCOM of Russia)
- 1All-Russian Research Institute for Fire Protection (VNIIPO), the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters (EMERCOM of Russia)
- Issue: Vol 118, No 1 (2025)
- Section: Scientific and Technical Developments
- URL: https://journal-vniispk.ru/2411-3778/article/view/308617
- DOI: https://doi.org/10.37657/пб.v118i1.308617
- ID: 308617
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Abstract
The effect of thermal action on coal was studied using the method of complex explosive and thermogravimetric tests. The dust of coal grades Zh and D was studied in the state “before the explosion” with subsequent comparison of similar indicators of dust “after the explosion”. The effect of multiple dust explosiveness has been established: post-explosive dust retains explosive properties and takes part in repeated explosions, which determines potentially dangerous zones for rescuers during emergency response. It has been established that a repeated dust explosion occurs when the LEL increases by approximately 2 times (for grade D coal from 43 g/m3 to 100 g/m3). The re-explosion pressure for dust concentrations close to the LEL (jt ≈ 100÷350 g/m3) is significantly lower than the initial value (≈ 6 times). As the dust concentration increases, the difference in pressure ∆P decreases and for jt ≥ 500 g/m3 the values of the pressures of the initial and repeated explosions are practically the same. The results were used in the regulatory document of EMERCOM of Russia, which regulates the collection of dust samples, the procedure for its study during rescue operations and during the investigation of technical causes of the accident.
About the authors
Sergey B. Romanchenko
All-Russian Research Institute for Fire Protection (VNIIPO), the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters (EMERCOM of Russia)
Email: romanchenkosb@mail.ru
ORCID iD: 0000-0002-7616-0516
SPIN-code: 1486-6030
Scopus Author ID: 56209222400
Doctor of Technical Sciences, Docent, Leading Researcher
Russian Federation, VNIIPO microdistrict, house 12, Balashikha, Moscow region, 143903, RussiaЕlena A. Gubina
1All-Russian Research Institute for Fire Protection (VNIIPO), the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters (EMERCOM of Russia)
Email: spectehsist@gmail.com
ORCID iD: 0000-0002-3566-5729
SPIN-code: 7628-1573
Chief of Sector
Russian Federation, VNIIPO microdistrict, house 12, Balashikha, Moscow region, 143903, RussiaViktoriya V. Vdovina
All-Russian Research Institute for Fire Protection (VNIIPO), the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters (EMERCOM of Russia)
Email: k703a@yandex.ru
ORCID iD: 0000-0003-4401-399X
SPIN-code: 3739-3491
Senior Researcher
Russian Federation, VNIIPO microdistrict, house 12, Balashikha, Moscow region, 143903, RussiaYury K. Naganovskiy
All-Russian Research Institute for Fire Protection (VNIIPO), the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters (EMERCOM of Russia)
Author for correspondence.
Email: reut11731@mail.ru
ORCID iD: 0000-0001-9739-9123
SPIN-code: 9408-0656
Candidate of Technical Sciences, Leading Researcher
Russian Federation, VNIIPO microdistrict, house 12, Balashikha, Moscow region, 143903, RussiaReferences
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