Control air filling bag for coal face corner gas

The utility model discloses a control air filling bag for coal face corner gas. The gap between a coal face corner support and a roadway side part is filled with the control air filling bag, and therefore gas extraction at a gob is facilitated. The air filling bag is composed of an air filling opening, a bag body, an air outlet, a pressure release valve and fixing rings. A flow adjustment valve is installed at the air outlet, and the pressure release valve is installed at the inlet of the flow adjustment valve. The air filling bag is filled with compressed air through the air filling opening so as to enable the bag body to be swelled. Constant exhausting can circulate non-circulation gas still existing between the coal face corner and the bag body, and therefore no dead corners exist around the bag body. The air filling bag is convenient to move, rapid and convenient to operate and capable of being repeatedly used, greatly lowers the labor intensity of staff, increases the recovery rate of coal and shortens the affecting time of a coal face. The air filling bag can be easily manufactured at any size, is economical and practical, reduces outward surging of the gas at the gob and improves the extraction efficiency at the gob.