FIELD: heating.
SUBSTANCE: invention relates to pit and mine ventilation and may be used to increase validity of determination of ventilation parameters in developing entries of coal mines and pits, in particular, aerodynamic and mechanical parameters of a flexible deformable air duct. In the mine they install an air duct with air leaks that do not exceed 5%. Blowdown with a fan is carried out, and they measure air flow and pressure. Diameters and length of the air duct are measured, Produced data is added depending on specific aerodynamic resistance and elasticity modulus of an air duct material.
EFFECT: increased validity for determination of impact of deformability of flexible ventilation air ducts at its aerodynamics, its forecasting in process of arrangement of a developing entry.
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