A simplified model of spontaneous combustion in coal stockpiles

Brooks, Kevin; Glasser, David

doi:10.1016/0016-2361(86)90163-8

Cited by 82 publications

(31 citation statements)

References 3 publications

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“…The heat generation rate from coal in the high temperature range (over 60°C) follows the Arrhenius equation, which is based on a chemical reaction rate that accelerates self-heating. Brooks and Glasser (1986) presented a simplified model of the spontaneous combustion of coal stock using the Arrhenius equation to estimate heat generation rate. They used a natural convection model www.intechopen.com to serve as a reactant transport mechanism.…”

Section: Introductionmentioning

confidence: 99%

Equivalent Oxidation Exposure - Time for Low Temperature Spontaneous Combustion of Coal

Sasaki¹,

Sugai²

2011

Heat Analysis and Thermodynamic Effects

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Section: Introductionmentioning

confidence: 99%

Equivalent Oxidation Exposure - Time for Low Temperature Spontaneous Combustion of Coal

Sasaki¹,

Sugai²

2011

Heat Analysis and Thermodynamic Effects

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“…An alternative way in which a convective flow can be set up is through local heat generation within the porous material. Such a situation can arise through radioactive decay or through, in the present context, a relatively weak exothermic reaction taking place within the porous material, as can happen, for example, in the spontaneous combustion of organic materials [4,5,6] or coal stockpiles [7,8].…”

Section: Introductionmentioning

confidence: 99%

Natural convective boundary-layer flow in a heat generating porous medium with a prescribed wall heat flux

Merkin

2008

Z. angew. Math. Phys.

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The free convection boundary-layer flow on a vertical surface in a porous medium with local heat generation proportional to (T − T ∞ ) p , where T is the local temperature and T ∞ is the ambient temperature, is considered when the surface is thermally insulated. The way in which the flow develops from the leading edge is seen to depend critically on the exponent p. For p ≤ 2 there is a boundary-layer flow for all x > 0, where x measures distance from the leading edge, with the internal heating having a significant effect at large x. For p ≥ 5 there is also a boundary-layer flow to large x but now the internal heating has an increasingly weaker effect as x increases. For 2 < p < 5 the boundary-layer solution breaks down at a finite x, with a singularity developing leading to thermal runaway at a finite distance along the surface.

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“…As described in previous chapter, the radiating zone boundary is difficult to determine by using the oxygen distribution curve. In this research, the numerical simulation by FLUENT [19,20] was taken into account to assist in drawing the boundary.…”

Section: Goaf Air Flowmentioning

confidence: 99%

A Study on Preventing Spontaneous Combustion of Residual Coal in a Coal Mine Goaf

Wang

Zhang

Sugai

et al. 2015

Journal of Geological Research

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The effectiveness of grouting scheme has been simulated to prevent the coal spontaneous combustion at a goaf in Haizi Colliery, China. The colliery has been operated for long period over 27 years and has a complex ventilation network including airflow leakages which could possibly lead to the spontaneous combustion of coal at goafs. Firstly, the mine ventilation simulator MIVENA was used to analyze the mine ventilation network airflows to control airflows in and out of working faces and goafs. As the second approach, numerical simulations were carried by the simulator FLUENT in order to predict spontaneous combustion of residual coal with leakage flow in the #3205 goaf. It was cleared that the goaf can be divided into three zones based on oxygen concentration in the goaf area. Finally, the numerical simulation results show that the slurry grouting method is able to be an effective and economical method by reducing porosity in the goaf area to prevent spontaneous combustion of residual coal.

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A simplified model of spontaneous combustion in coal stockpiles

Cited by 82 publications

References 3 publications

Equivalent Oxidation Exposure - Time for Low Temperature Spontaneous Combustion of Coal

Equivalent Oxidation Exposure - Time for Low Temperature Spontaneous Combustion of Coal

Natural convective boundary-layer flow in a heat generating porous medium with a prescribed wall heat flux

A Study on Preventing Spontaneous Combustion of Residual Coal in a Coal Mine Goaf

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