Milling coal hole blocking prevention device for coal mine

The utility model discloses a milling coal hole blocking prevention device for a coal mine, and belongs to the field of coal mine machinery. The milling coal hole blocking prevention device comprises a coal bunker, a locking wellhead, a coal feeding opening, a liquid conveying pipe and a pressure ventilation pipe. The coal bunker is connected to the locking wellhead. The coal feeding opening is connected with the locking wellhead through a connection portion. The middle of the locking wellhead is provided with a connector. The connector is connected with one end of the liquid conveying pipe and one end of the pressure ventilation pipe. The other end of the liquid conveying pipe is connected to a water supply pipe of an underground roadway, and the other end of the pressure ventilation pipe is connected to a wind supply pipe of the underground roadway. According to the milling coal hole blocking prevention device, when a milling coal hole is blocked, a coal feeding worker can flush open the blocked coal hole through water pressure just by remotely operating a water supply valve; when the coal hole is seriously blocked, an air supply valve and the water supply valve can be opened at the same time, and water and the compressed air can be sprayed to a coal bunker wall at the same time to make blocking coal blocks collapse and fall off so as to achieve the hole through purpose. By means of the device, the defects that coal holes are penetrated manually in the prior art, strength is consumed, and unsafe factors exist are overcome, the coal hole penetrating work is safe to conduct, and strength is saved.