Abstract. The paper presents the results of two experiments conducted using the main mine fan in BKPRU-2 mine (PJSC Uralkali, Russia). The obtained data processing showed that a statistical verification of the measured data on their falsity and independence should be performed to effectively control the ventilation process. The mathematical dependences are provided for calculating the total natural draft during measurements, which significantly affects the ventilation process. This enables the control of ventilation in mines.

The article presents three main factors, influencing the strength of natural ventilating pressure in general mines between the shafts: gas emission from mines (air density changes due to the change in concentration of other gases), changes of air parameters taken in by ventilating shafts, and air pressure due to the productivity shifts of the Main Fan Unit (or other devices for positive and negative control of air distribution). According to the experiment data the equations mentioned in other works for calculating natural ventilating pressure in general mines and taking into account the parameters of the air taken in are precise. Applying these formulas basing on the results of hydro meteorological forecast, whose accuracy in the short-term forecast is also high, it is possible predict the operating mode of the system of ventilation.