Safety assessment of use of industrial facilities in the presence of explosion of forecast mathematical model shock tube

Abstract. Purpose. The explosions of gas-air environment in buildings and underground structures (for example, in coal mines) are among the most dangerous industrial accidents related to the use, processing or production of combustible materials. The coal mine such explosions can occur not only in the course of maintenance work, but also during the work on the liquidation has occurred accidents - fires or explosions of methane in the mining and tunneling sites. To reliably calculate the stability of industrial facilities, installations protecting rescuers and emergency workers from repeated explosions, you must know the accurate parameters of the hazards of explosive air waves, namely the overpressure blast impulse acting on the protective structure, and other parameters. Purpose - to study the adequacy of the criteria and the establishment of the convergence of the numerical calculation results of a mathematical model of ignition and explosion of the gas mixture as a result of numerical experiment. Method. Analysis and synthesis of theoretical studies, mathematical modeling of the dynamic processes of the explosion gas mixture in a closed volume. Results. The existing experimental and theoretical studies on the explosion pressure in a closed volume in justifying the use of a mathematical model of the shock tube to assess the safe operating conditions of industrial production facilities that use or recycle flammable liquids and substances that form combustible dust, as well as to the operating conditions of buildings and facilities where flammable gases are used (eg for heating). Adopted the criteria for assessing the adequacy of the mathematical model of the shock tube adopted in accordance with well-known approach to models of combustion processes. Scientific novelty. In the fourth set the level of adequacy of the mathematical model of the shock tube in the first stage of the evaluation of static parameters in numerical experiments. Produced by a numerical calculation of the explosion pressure gas mixture in a closed volume. Practical meaningfulness. Numerical experimental results allow us to establish reliable explosion pressures and gas mixture in a closed volume, and thus to evaluate risk factors for the safe operation of industrial facilities.