EXCAVATING STRUCTURE AND CONSTRUCTION METHOD FOR PREVENTING TRANSMISSION OF BLAST VIBRATION USING LINE DRILLING HOLES

摘要

Drilling structure for blasting off to prevent the blast vibration transmitted to the outside, but drilling of two or more column lines drilling hole around the for the blasting of rock to be excavated area, each column line drilling the ball is blasting the outside in order to prevent the transmission to and to be disposed to be offset from each other with respect to the blasting area. Within each column line drilling hole is filled with a vibration absorbing material for absorbing blast vibration.