Mining medium-length blasthole blocking device

The utility model relates to a mining medium-length blasthole blocking device which comprises a wooden plug which is cylindrical wholly, a rubber sleeve, a main rod and a plurality of auxiliary rods. The wooden plug is divided into the A portion and the B portion by a section, and the sections penetrating the cylinder at any diameter are respectively located on a 2/3 vertical line and a 1/3 vertical line on the upper and lower bottom faces. A cushion block is connected onto the bottom face of the B portion. A steel nail is arranged in the bottom face of the A portion, and a rope A is tied on the steel nail. The upper portion of the main rod is provided with an annular rope slot, and the lower portion of the annular rope slot is provided with an axial rope slot A communicated with the annular rope slot. A rope B is tied in the annular rope slot. The auxiliary rods are provided with axial rope slots B in a running-through mode. The mining medium-length blasthole blocking device is low in manufacture cost, simpl