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

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. 

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2. Jundika C. Kurnia, Agus P. Sasmito, Arun S. Mujumdar. Simulation of a novel intermittent ventilation system for underground mines. Tunnelling and Underground Space Technology. 2014. Iss. 42. pp. 206–215.

3. Zhou Lihong, Pritchard Christopher, Zheng Yi. CFD modeling of methane distribution at a continuous miner face with various curtain setback distances. International Journal of Mining Science and Technology. 2015. pp. 1–6.

4. Javier Torano, Susana Torno, Mario Menendez, Malcolm Gent, Judith Velasco. Models of methane behaviour in auxiliary ventilation of underground coal mining. International Journal of Coal Geology. 2009. Iss. 80. pp. 35–43.

5. C. Özgen Karacan. Modeling and prediction of ventilation methane emissions of U.S. longwall mines using supervised artificial neural networks. International Journal of Coal Geology 73. 2008. pp. 371–387.

6. Heather N. Dougherty, C. Özgen Karacan. A new methane control and prediction software suite for longwall mines. Computers & Geosciences 37. 2011. pp. 1490–1500.

7. Jundika C. Kurnia, Agus P. Sasmito, Arun S. Mujumdar. Simulation of a novel intermittent ventilation system for underground mines. Tunnelling and Underground Space Technology 42. 2014. pp. 206–215.

8. Kachurin N. M., Konovalov O. V., Kachurin A. N. Aerologicheskoe obosnovanie i matematicheskie modeli ventilyatsii tonneley pri ikh stroitelstve (Aerological substantiation and mathematical models of tunnel ventilation during its construction). Bezopasnost zhiznedeyatelnosti = Life safety. 2010. No. 5. pp. 6–12.

9. N. M. Kachurin et al. Matematicheskie modeli aerogazodinamiki tonneley pri ikh stroitelstve (Mathematical models of tunnel aerogasdynamics during its construction). Izvestiya Tulskogo Gosudarstvennogo Universiteta. Estestvennye nauki = Proceedings of Tula State University. Natural sciences. 2010. Iss. 1. pp. 246–255.

10. N. M. Kachurin et al. Razrushenie gornykh porod sharoshkami i dispergirovanie primesey v zhidkostyakh (Rocks distruction by cone rollers and impurity dispersion in liquids). Moscow — Tula : Publishing House «Grif i K». 2003. 330 p.