During mine operation, the resistance of mine workings continuously changes due to changes in their length, cross-section, obstructions, wall roughness, etc. A change in the resistance of an individual working included in the mine ventilation system is accompanied by a general redistribution of air in the system of workings, which often leads to unsatisfactory ventilation of the mine. The greatest fluctuations are experienced by the resistance of extraction panels and stopes due to changes in their cross-section and length during the extraction process. Observations show that the resistance of stopes can vary by a factor of 7–8 due to changes in cross-sectional area. Naturally, such significant resistance fluctuations lead to instability of the ventilation and gas conditions in longwall faces and in the panel as a whole. As a rule, the greatest resistance of the face, and hence the minimum air supply, occurs during coal extraction, when the demand for air is maximum. During preparatory operations and in non-working shifts, the amount of air supplied to the face is large and could be reduced ...

One of the main tasks of automating ventilation of mines is the creation of sensors for monitoring aerodynamic parameters of mine air. Normal operation of devices for regulating the flow, pressure and temperature of mine air is impossible without continuous automatic monitoring of their operation. As is known, a number of specific requirements are imposed on instruments intended for use in mines: increased resistance to shock and vibration, leak‑tightness, economy and independence of the power supply source from the mine power grid ...