Air distribution

AIR DISTRIBUTION within the underground mine (EN: air distribution in the mine; DE: Wetterverteilung im Schacht; FR: distribution d'air dans la mine; ES: distribucion del aire en mina; RU: воздухораспределение) is the totality of the established expenditures of the air within the branches of the ventilation network within the underground mine.

The air distribution proceeds under the impact of the differential pressure of the air (depression), which is created as the result of the work of the ventilators for the main airing, as the result of the natural updraft, or as the result of their joint action, and depends on the aerodynamic drag within the mine workings. They distinguish the natural and specified air distribution, that is the air distribution, which is required according to the conditions for the provision of the atmosphere with the certain composition (according to the acceptable content of the harmful admixtures) and status (according to the acceptable temperature, and humidity) within the mine workings of the underground mine.

The natural air distribution proceeds with the minimal expenditure of the energy for the movement of the air within the ventilation network. The specified air distribution is accompanied by additional expenditure of the energy, which is associated with the installation of the regulators within the certain branches of the ventilation network. The delivery of the air into the underground mine, or into the individual places of its ventilation network, is regulated using the changing of the mode of the work of the ventilators, and using the installation of the ventilation structures within the underground mines. They use the first method for the regulation of the delivery of the air for the entire underground mine, and they use the second method for the regulation within the underground mine.

They distinguish the so-called negative and positive regulation of the air distribution. In case of the negative regulation of the air distribution, they increase the aerodynamic drag of the individual branches of the ventilation network within the underground mine (for the increasing of the delivery of the air into the parallel branches). The negative regulation leads to the additional expenditure of the energy; in this case, the quantity of the air, which is arriving into the underground mine, decreases. They perform the positive regulation on the account of the decreasing of the aerodynamic drag of the ventilation network within the underground mine as a whole, or within the individual branches of this network, and also using the installation of the additional boosters for the updraft of the air within the branches, which are being boosted. In case of the positive regulation, the quantity of the air, which is arriving into the underground mine, increases.