METHOD OF VENTILATION OF EXTRACTION DISTRICT IN REVERSE ORDER OF MINING Russian patent published in 2014 - IPC E21F1/00 

FIELD: mining.

SUBSTANCE: method is carried out by means of preventing air leakage through the timely mounting and dismounting the ventilation jumper behind the working chambers, depending on the values of the thermal depressions. The method comprises implementation of the preliminary calculation of the minimum and maximum thermal depressions h_{e min} and h_{e max}, respectively, arising between the gate road and ventilation connections, and also between the gate road and embedded conveyor air gates as functions of the minimum h_{e min}=f(ΔH_min) and the maximum h_{e min}=f(ΔH_min) of values of the differences of the elevation points between the place of mining of working chambers and the place of air outlet from the gate road in the slope ΔH_min and ΔH_max. And the values ΔH are calculated based on the length of the extraction district, the number of pairs of exhaust chambers, the length of the exhaust area behind the ventilation connections, the width of the exhaust chambers, the width of the stope and the angle of dip. At that in the process of increasing the number of exhaust chambers and when achievement of the value of thermal depression equal to h_{e min} the jumper is dismantled, and when achievement of the value of thermal depression equal to h_{e max}, the jumper is mounted again.

EFFECT: improvement of efficiency of ventilation.

2 dwg