Assessment of actual temperature regime in chambers for installation of fans

Abstract

The article considers an assessment of the safe temperature regime in mine chambers used for the isolated suction of methane from the mined-out space after coal mining. The isolated removal of methane from the produced space outside the mining area through a pipeline with the help of gas-suction fans is used in the Donbas mines. Gas suction units are placed in specially prepared chambers that are ventilated with fresh air. In accordance with the regulatory requirements, ventilation units should be evaluated for air temperature at permanent workplaces in underground workings of coal mines, depending on humidity, air movement speed, and individual categories of work. An analytical comparison of actual temperature regime in the chambers for ventilation gas suction units with permissible norms according to sanitary and hygienic standards was performed. The rational parameters of temperature regime in the chambers for ventilation gas suction units were determined, which can be considered “conditionally” acceptable for the mining and geological conditions in mines of the “Pokrovs’ke” Mine Administration. The substantiation is given to physical parameters of air inflowing into the chambers for ventilation gas suction units needed for their ventilation and in order to maintain sanitary and hygienic standards by temperature. The dependence of the flow rate of air inflowing into the chambers for ventilation gas suction units on its maximum permissible value according to sanitary and hygienic standards is established. It is established that in order to ensure a standard temperature regime in the chambers for ventilation gas suction units in the mining and geological conditions of mines of the “Pokrovs’ke” Mine Administration; it is recommended not to use cooling plants due to their economical impracticability. This will reduce economic costs of ensuring the standard temperature regime. It is necessary to reduce the cost savings on ensuring the standard temperature regime in these chambers and to ensure safe operation associated with the isolated removal of methane from the mined-out space after coal mining.