Coal face corner gas accumulation prevention device

The utility model discloses a coal face corner gas gathering prevention device which comprises an air inlet pipe (3) and an air outlet pipe (4), and the diameter of a pipe opening of the air inlet pipe (3) is smaller than that of a pipe opening of the air outlet pipe (4). The top end of the air inlet pipe (3) is provided with an air inlet (1), and the bottom end is communicated with the lower part of the air outlet pipe (4); a plurality of diffusion holes (2) are evenly formed in the upper pipe wall of the air outlet pipe (4), a water inlet (5) and an air outlet (7) are formed in the top of the air outlet pipe (4), a water outlet (6) is formed in the bottom of the air outlet pipe (4), and plugs are arranged on the water inlet (5) and the water outlet (6) in a matched mode. The water containing depth of the lower portion of the air outlet pipe (4) accounts for 1/4-1/3 of the height of the whole air outlet pipe (4). According to the device, on one hand, air outlet is uniform, coal face corner gas gathering is p