Explosive filling device for mining and blasting of strip mine in permafrost region and using method of explosive filling device

The invention discloses an explosive filling device for mining and blasting of an open-pit mine in a frozen soil area and a using method of the explosive filling device, and relates to the technical field of mining and blasting of open-pit metal mines in the frozen soil area. A material collecting hopper is welded to the bottom of a medicine containing barrel, the bottom of the material collecting hopper communicates with a vertical medicine guiding pipe in a welded mode, and a cover disc of a circular structure is fixedly welded to the bottom of the vertical medicine guiding pipe. Two vertical threaded shafts are symmetrically and rotatably mounted at the top end of the cover disc, and a synchronous ring is slidably mounted on the two vertical threaded shafts through threaded connection; a discharging opening of a circular structure is formed in the center of the cover disc in a penetrating mode, and six long strip grooves are formed in the bottom of the cover disc in an annular array mode. The device has th