Computational Fluid Dynamics Modeling of a Methane Gas Explosion in a Full-Scale, Underground Longwall Coal Mine

Juganda, Aditya; Strebinger, Claire; Brune, Jürgen F.; Bogin, Gregory E.

doi:10.1007/s42461-022-00587-z

Cited by 5 publications

(4 citation statements)

References 11 publications

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Section: Introductionmentioning

confidence: 99%

“…Methane explosions are one of the main disasters in coal mining and can very easily cause mass death and injuries, as well as seriously threaten the safety of underground operators. 1,2 The use of an active powder spray explosion suppression system to quickly spray an explosion suppressant after an explosion can weaken the intensity of methane explosions, reducing the loss of life after methane explosion accidents. 3,4 Experts and scholars worldwide have conducted active powder spraying explosion suppression system research and have focused mainly on powder explosion suppressants, such as SiO 2 , NH 4 H 2 PO 4 , NaHCO 3 , Al(OH) 3 , KHCO 3 , urea, ferrocene, diatomaceous earth, and montmorillonite, which contain sodium or potassium salts compounds that exhibit good inhibitory effects.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

2022

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To achieve the best explosion suppression effect of an active powder spraying system, the KHCO 3 powder suppression test for a 9.5% methane–air premixed methane explosion was studied based on an independent test platform consisting of a pipe network. The suppression effect of KHCO 3 powder particle size and powder spraying pressure on the methane explosion shock wave pressure, flame wave velocity, and flame wave temperature were studied, and the explosion suppression mechanism was analyzed. The results indicated that both the particle size of the KHCO 3 powder and powder spraying pressure had a significant effect on the explosion inhibition. When the spraying pressure was in the range of 0.1–0.2 MPa, the increase in KHCO 3 powder spraying pressure on the effect of explosion suppression was significantly enhanced, and when the powder spraying pressure exceeded 0.2 MPa, the explosion suppression effect did not obviously increase. With a reduction in the KHCO 3 powder particle size, the effect of explosion suppression significantly improved, and when the KHCO 3 powder particle size was reduced to 50–75 μm, we observed the best shock wave pressure, flame wave velocity, and flame wave temperature suppression effect.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

2022

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“…In the field of methane drainage, Botao et al [11] and Qin et al [12] examined the effectiveness of selected drainage pressures on the return air methane concentrations and fire hazard, while Zapletal and Kosowski [13] analyzed selected methane collector diameters, Cao and Li [14] and Skotniczy [15] studied the distribution of methane concentrations in the mining-induced fracture zone in terms of its extraction and Wang et al [16] researched methane concentration distribution in goafs and its interaction with the fire hazard. The research subject are also dynamic phenomena, such as methane explosion initiation and development [17].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Auxiliary Air-Duct Outlet and the Brattice Location on the Methane Hazard—Numerical Simulations

et al. 2022

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The article presents the results of research into the influence of the location of auxiliary ventilation devices on the distribution of methane concentrations at the outlet of the longwall in an underground mine. Since this area is crucial from the point of view of explosion risk, the existence of an optimal arrangement of these devices could lead to improved safety of the crew working in the area. The aim of conducted study was to examine if the impact of this devices placement is significant. The research was carried out with the use of computational fluid dynamics (CFD) modeling—Ansys Fluent. The analyses took into account the location of the two most commonly used devices: a brattice and an auxiliary air-duct. The numerical model has been prepared and validated based on in situ measurements. Thirty-two cases of device configurations were analysed. The length and position of the brattice, as well as the height and position air-duct outlet along tailgate, were modified. It has been shown that although the presented solutions are an effective risk mitigation method, contrary to the common opinion of many practitioners, the impact of their exact placement, provided it is compliant with the regulations, is not significant for the registered methane concentration distribution at a longwall outlet.

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“…На сегодняшний день в России нет нормативного или мето дического документов, позволяющих объективно учитывать взаимное вли яние общешахтной депрессии, рабо ты газоотсасывающих вентиляторов и средств дегазации на управление га зовыделением в очистной выработке.МЕТОД ТРЕХМЕРНОГО МОДЕЛИРОВАНИЯ АЭРОГАЗОДИНАМИКИ ВЫЕМОЧНЫХ УЧАСТКОВТрехмерное моделирование актив но применяется в рудничной венти ляции, чаще всего применяют про граммный комплекс ansys. Для уголь ных шахт реализованы модели, по зволяющие учесть перемещение добычно го комбайна[1] с высоким уровнем детали зации (рис. 2).…”

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Features of Modeling Aerogasodynamics of Coal Mine Face

Kulik,

Timchenko,

Kosterenko

et al. 2023

Ugol'

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analysis of major accidents at the Severnaya (2016) and listvyazhnaya (2021) coal mines revealed a number of problems related to ventilation. the aerologi cal safety of a coal mine is achieved by the correct choice of technological solutions in the design, and in the process of coal mining -by operational control of the state of the mine atmosphere and gas emission control. Cur rently, coal mines, due to the high gas content, use a whole range of measures, including new ventilation schemes, various types of degassing and gas suc tion. at the same time, design and regulatory documents do not offer solu tions for calculations in a single system of all thrust sources. as the conducted studies have shown, three-dimensional modelling allows us to evaluate the mutual influence of all methods of gas emission control in a single system.

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Computational Fluid Dynamics Modeling of a Methane Gas Explosion in a Full-Scale, Underground Longwall Coal Mine

Cited by 5 publications

References 11 publications

Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Influence of the Auxiliary Air-Duct Outlet and the Brattice Location on the Methane Hazard—Numerical Simulations

Features of Modeling Aerogasodynamics of Coal Mine Face

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Computational Fluid Dynamics Modeling of a Methane Gas Explosion in a Full-Scale, Underground Longwall Coal Mine

Cited by 5 publications

References 11 publications

Study on the Effect of KHCO3 Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Study on the Effect of KHCO3 Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Influence of the Auxiliary Air-Duct Outlet and the Brattice Location on the Methane Hazard—Numerical Simulations

Features of Modeling Aerogasodynamics of Coal Mine Face

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Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks