Steel pipe lead-in detonation tool for dredging blockage of draw shaft

A steel pipe lead-in detonation tool for dredging the blockage of a draw shaft comprises a plurality of steel pipes; a steel cone sharp is loosely connected with the front end of one steel pipe; the tail end of the steel pipe is sequentially connected with multiple steel pipes according to the blockage length of the draw shaft; a rope tightening ring is welded at the tail part of the steel cone sharp; one end of a rope is tied at the rope tightening ring at the tail part of the steel cone sharp; the other end of the rope penetrates through the inner space of the steel pipe and extends out of the tail end of the steel pipe. The steel cone sharp guides the steel pipe to penetrate through the blockage of the draw shaft and then is automatically separated from the steel pipe; the rope is guided by the steel cone sharp to downwards move to a loading chamber at the lower part of the draw shaft, an explosive is upward pulled by the rope to the blockage to detonate, the internal balance in bulked occluded extrusion b