Medium-length hole blasting device for underground mine

The invention relates to the technical field of mining blasting equipment, and discloses an underground mine medium-length hole blasting device which comprises a blasting cartridge, a cartridge cover is installed at the upper end of the blasting cartridge, a fixing disc is installed below the blasting cartridge, a fixing cover is installed at the upper end of the fixing disc, and a collecting tank is installed on the lower surface of the fixing disc in a penetrating mode. A positioning ring is installed on the lower surface of the interior of the fixing disc, a plurality of positioning plates are installed between the fixing disc and the positioning ring, and a trigger mechanism is arranged on the upper surface of the fixing cover and located between the two fixing mechanisms. A pull rope in a trigger mechanism is pulled upwards to drive a limiting rod to leave the interior of a mounting pipe, so that clear water in a mounting base is discharged through the mounting pipe and drips onto a water-soluble block,