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AEROLOGY
ArticleName Theoretical substantiation and practical results of underground workings ventilation simulation
DOI 10.17580/em.2015.02.09
ArticleAuthor Kachurin N. M. , Vorobev S. A., Levin A. D., Botov F. M.
ArticleAuthorData

Tula State University, Tula, Russia:

N. M. Kachurin, Doctor of Engineering Sciences, Professor, Head of a Chair, ecology@tsu.tula.ru

A. D. Levin, Post-Graduate Student, galina_stas@mail.ru

F. M. Botov, Post-Graduate Student

 

Belgorod State University, Belgorod, Russia:

S. A. Vorobev, Researcher, office@rudmet.ru

Abstract

Solving different problems of forecasting gas situations in underground workings are based on algorithms of CFD (computational fluid dynamics) modeling.  But many models have got theoretical orientation to only gas dynamics. Practice of mathematical modeling shows that results of computational fluid dynamics connect with quality of basic mathematical model. Adequate mathematical models for modeling air motion by ventilation of large cross section underground workings are proposed. Modeling air motion by ventilation of large cross section underground workings at general case is founded at system of Reynolds motion equations, which describing viscous, compressible and heat-conducting gas current at three-dimensional mathematical model. Discretization of the equations is realized by finite volume method. Discretization of the calculating area is made by using multiple-unit, unorthogonal, adaptive, structured grid. Every subarea is imaged at form of three-dimensional grid junctions (i, j, k), where 1 ≤ i, j, k  ID. All dependent variables are defined in the every grid junction. Different program systems can be used for realizing proposed algorithm and numerical modeling air motion by ventilation of large cross section underground workings. Such workings are mining production chambers in different mines and tunnels different purposes. Results of modeling air motion by ventilation in the tunnel with large cross section were gotten for working with cross section area of 100 m2. Quantity of ventilation air was equal to 18–30 m3/s. We considered combination ventilation system. The middle pipeline realized blowing ventilation method and gave fresh air into working face. The left-hand and right-hand pipelines were uniform aspiration pipelines. The uniform aspiration pipelines had lateral slits for uniform aspirating polluting air. Results of modeling demonstrate that created calculating algorithm making possible very efficiency air motion simulation for different ventilation schemes of large cross section underground workings. It’s very important perspectives for raising quality of projecting ventilation for active and under construction mines and tunnels. 

keywords Simulation, turbulence, final element, motion equations, air viscous, underground working, cross-section, calculating experiment
References

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