Tóm tắt:

Ventilation is very important for the Ị underground coal mines. The ventilation, bringing clean air to supply air ío curb people working in the mine, diluting the Ị concentratíon of toxic gases and harmíul gases, diluting the dust concentration 'and bringing them out of the mine and ensuring comtortable micro climate conditions in the vvorkplace. Hà Ráng Coal Companỵ-TKV is currentíy using two main blower síations to ventilate the mine with the capacity of each tan station is different: FBDCZ-N19/2x220 kW fan in the tan door level +100 and FBDCZ-N16/2x 110 kW at the +240 ỉeve! fan station vvorking in parallel at the same time. For two fans to work effectively to meet the requirements of ventilation of the mine, and avoid the occurrence of wind bracing between the two major fan stations, the article calculated, determine the *working mode of each fan station. The maỉn wind fits the capacity of each fan and meets the ventilation requirements imposed each tan.