BLAST PRESSURE EFFUSION INHIBITION DEVICE FOR EMPTY HOLE AND METHOD FOR BLASTING CENTER-CUT USING THE SAME

摘要

PURPOSE: A blast pressure effusion restraint device for an empty hole and an environmentally-friendly center-cut blasting method using the same are provided to maximize blasting efficiency by blocking the open top of an empty hole in order to prevent the outflow of blast pressure. CONSTITUTION: A blast pressure effusion restraint device for an empty hole comprises first to third air ball plugs(110,120,130). A plug rope(111) is connected to the top of the first air ball plug. The second air ball plug is connected to the bottom of the first air ball plug through a check valve(150). The third air ball plug is connected to the bottom of the second air ball plug through a check valve. Air injection ports(140) are formed at one side of each air ball plug. An injection port plug(142) is installed on the outer front end of an air injection port and one side of the injection port plug is fixed to the air injection port. [Reference numerals] (AA) Blue; (BB) Green; (CC) Yellow; (DD) Red