Kaledina N. O., Head of Department, Doctor of Engineering Sciences, e-mail: nok52@mail.ru; Kobylkin S. S., Postgraduate Student, e-mail: sergey@kobylkin.ru, Moscow State Mining University.

The paper presented short analysis of accident risks and injuries at coal pits of Russia, connected with methane explosions and flares. The new approach to designing of coal pits ventilation, based on 3D simulation of aero-gasdynamics processes has been proposed. The results of numerical calculations of diffusion processes in stratified flows have been shown.

1. Rukovodstvo po proektirovaniyu ventilyatsii ugolnykh shakht (Instruction of ventilation designing in coal pits). Moscow, 1975.

2. Ushakov K. Z. Gazovaya dinamika shakht (Gas dynamics of pits). Moscow, 1984.

3. Ushakov K. Z. Modelirovanie po sredney skorosti potoka (Simulation by stream average velocity). Miskolc : Reprint. From publication of the technical university for heavy industry, 1987.

4. Laygna K. Yu. Raschet konvektivno-diffuzionnogo perenosa gazoobraznykh primesey v gornykh vyrabotkakh slantsevykh shakht Estonskoy SSR (Calculation of convective-diffusion transfer of gas admixtures in excavations of shaly pits of Estonian Soviet Socialist Republic). Tallinn, 1982.

5. Laygna K. Yu. Matematicheskoe modelirovanie diffuzionnykh protsessov ventilyatsii shtreko- i kameroobraznykh vyrabotok (Mathematical simulation of diffusion processes of gateroad and stone-forming excavation ventilation) Tallinn, 1979.

6. Baklanov A. A. Chislennoe modelirovanie v rudnichnoy aerologii (Numerical simulation in ore aerology) Apatity, 1988.

7. Pravila bezopasnosti v ugolnykh shakhtakh (Regulation for safety in coal pits) PB 05-618-03 (Russian grade). Moscow, 2007.

8. Instruktsiya po sisteme aerogazovogo kontrolya v ugolnykh shakhtakh (Instruction for system of aerogas control in coal pits) RD 05-429-02 (Russian grade). Moscow, 2002.