Abstract
Coupling simulation model between mine ventilation network and gob flow field
Highlights
Air leakage into mine gob is not desirable for underground coal mines employing a bleederless ventilation system
A good understanding of the gob flow field (GFF) is helpful for developing strategies to control and prevent spontaneous combustion and explosive methane concentration at the tailgate T-junction – both of which are of great concerns for mine safety
A good understanding of the air flow in the longwall gob behind its operating face is important for mine safety management
Summary
Affiliation: 1College of Safety Science and Engineering, Xi’an University of Science and Technology, China. 2Department of Mining Engineering, West Virginia University, USA. A novel model coupling the mine ventilation network (MVN) and gob flow field (GFF) has been developed to simulate the overall mine ventilation system. The concept of network boundary node was proposed and the corresponding air flow rate balance equations were developed based on the node pressure method for MVN calculation and the finite element method for GFF simulation. These equations, containing the rate of air flow from the branches and from the gob, revealed the coupling relationship between 1D MVN and 2D/3D GFF. Mine ventilation network, spontaneous combustion, longwall mining, numerical simulation.
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