Abstract
Flow of venƟlaƟon air stream through the dog heading with a fire centre is the flow with complex character, during which as a result of emission of fire gases into the mining atmosphere, there occur to disturbances of its flow. In the paper there is presented a nu merical analysis of an influence of exogenous fire in a dog heading, on the parameters of the venƟlaƟon air stream flowing through this heading. Modeling tests were carried out with a use of ANSYS soŌware, basing on the Finite Volume Method. For the made as sumpƟons, there were determined physical parameters of air stream flowing through the heading with a fire centre, and also changes in mass fracƟon of gases in this stream during its flow through the analyzed heading: oxygen, carbon monoxide and carbon dioxide. As a result of performed analysis over the fire centre , the local increase of velocity and temperature and violent decrease of staƟc pressure were record‐ ed. Model of heading presented in the paper gives possibiliƟes for development, and then the analysis of more compli‐ cated problems in a range of venƟlaƟon of minin g headings.
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