Earthing removing device for mine tunnel

The invention discloses an earthing removing device for a mine tunnel. The earthing removing device comprises a square connecting plate. Ear plates with shaft holes are mounted on two sides of the upper part of the connecting plate. A trapezoidal reinforcing plate is welded between the two ear plates. An arc-shaped toothed bar with a bucket tooth is welded in the middle of the bottom of the connecting plate. A stiffening plate is welded between the peripheral edge of the square connecting plate and the outer wall of the toothed bar. An alloy sheath is mounted on the inner side of an arc-shaped curved surface of the toothed bar by means of a pin. A toothed sleeve is mounted at the upper part of the bucket tooth by means of a pin. Two arc-shaped guide grooves are formed in the inside wall of the lower part of the bucket tooth, and extend in the direction from the bottom of the bucket tooth to the bottom of the toothed sleeve. The depths of the guide grooves are progressively increased in the extending direction of the guide grooves. Since the depths of the guide grooves are progressively increased in the extending direction of the guide grooves, with the penetration of the bucket tooth, a space for releasing the extrusion force action between the inside wall of the bucket tooth and a material matrix is gradually increased, and the downwards cutting efficiency of the bucket tooth is further improved.