Water hole charging device and charging method thereof

The invention belongs to the field of blasting engineering, and mainly relates to a water hole charging device and a charging method thereof. The device consists of two light, thin and brittle plasticcylinders with different radiuses and the same heights: a first cylinder is embedded in a second cylinder, and the bottoms are connected; a strip opening is vertically formed in the closed side surface of the top of the first cylinder for charging; and a nylon rope is fixed around the top end, communicating with the atmosphere, of the second cylinder. The charging process is as follows: the charging is performed in the first cylinder according to the designed quantity and the calculated filling density; a cavity between the two cylinders is fully filled with fine rock chips; and the rock chips are fed to the bottom of a blasthole through the smooth nylon rope. Through the cartridge bag density increasing method, the condition of difficult sinking of general water hole charging cartridge bags is overcome, the cart