COMBINED BLASTING METHODS USING DECK CHARGE BLASTING METHOD AND WIDE SPACE BLASTING METHOD SIMULTANEOUSLY

摘要

PURPOSE: A combined blasting method using a deck charge blasting method and a wide space blasting method is provided to obtain a desired drilling rate by arranging more gunpowder in a perforated hole. CONSTITUTION: A combined blasting method using a deck charge blasting method and a wide space blasting method is as follows. Perforated holes are excavated to have two or more rows. The perforated holes are charged with gunpowder. The gunpowder is separated from each other using a division rod. The division rod is composed of an upper rod, a lower rod, and pin members. Two or more first through holes are formed in the upper rod, and two or more second through holes are formed in the lower rod. When the upper rod is inserted into the lower rod, the pin members are inserted into the first and second through holes.