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Mining Publication: Numerical Study on Effects of Coal Properties on Spontaneous Heating in Longwall Gob Areas
Keywords: Coal Coal mining Gobs Numerical modeling Spontaneous combustion
Original creation date: November 2008
Authors: L Yuan, AC Smith
Peer Reviewed Journal Article - November 2008
Download PDF Document (1.17 MB)
NIOSHTIC2 Number: 20034340
Fuel 2008 Nov; 87(15-16):3409-3419
A computational fluid dynamics (CFD) study was conducted to model effects of coal properties on the potential for spontaneous heating in longwall gob (mined-out) areas. A two longwall panel district using a bleeder ventilation system was simulated. The permeability and porosity profiles for the longwall gob were generated from a geotechnical model and were used as inputs for the three-dimensional CFD modeling. The spontaneous heating is modeled as the low-temperature oxidation of coal in the gob using kinetic data obtained from previous laboratory-scale spontaneous combustion studies. Heat generated from coal oxidation is dissipated by convection and conduction, while oxygen and oxidation products are transported by convection and diffusion. Unsteady state simulations were conducted for three different US coals and simulation results were compared with some available test results. The effects of coal surface area and heat of reaction on the spontaneous heating process were also examined.
Image of publication Numerical Study on Effects of Coal Properties on Spontaneous Heating in Longwall Gob AreasPeer Reviewed Journal Article - November 2008
Download PDF Document (1.17 MB)
NIOSHTIC2 Number: 20034340
Fuel 2008 Nov; 87(15-16):3409-3419
See Also
CFD Modeling of Spontaneous Heating in a Large-Scale Coal Chamber
Computational Fluid Dynamics Modeling of Spontaneous Heating in Longwall Gob Areas
Effect of Longwall Face Advance on Spontaneous Heating in Longwall Gob Areas
Effects of Ventilation and Gob Characteristics on Spontaneous Heating in Longwall Gob Areas
Elastic and Shear Moduli of Coal Measure Rocks Derived from Basic Well Logs Using Fractal Statistics and Radial Basis Functions
Simulation of Spontaneous Heating in Longwall Gob Area with a Bleederless Ventilation System
SPONCOM - A Computer Program for the Prediction of the Spontaneous Combustion Potential of an Underground Coal Mine
Spontaneous Combustion
Stochastic Modeling of Gob Gas Venthole Production Performances in Active and Completed Longwall Panels of Coal Mines
Technology News 545 - NIOSH Updates Spontaneous Combustion Assessment Software
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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