A DECREASING METHOD OF BLASTING NOISE OF A PIT

摘要

The present invention relates to a method for reducing blasting noise near a shaft, and adjacent to each other with a predetermined distance on a lower surface of a cover door (2) covered by an opening of a shaft (1) surrounded by a soundproof wall (3) of a predetermined height. The non-woven fabrics 4 and 4b of appropriate sizes are mounted to be folded to be adjacent to each other in multiple layers while forming a predetermined height, while the doors formed at the sides of the cover door 2 are connected to each other. 5) and non-woven fabrics (4, 4b) of the appropriate size are formed in a plurality of layers at a predetermined height through a plurality of angles (7) fastened to be adjacent to each other with a predetermined distance to the step (6) that is inclined downwardly. In addition to being folded to be adjacent to each other, it is mounted along the inclination angle of the stairs (6), so that the noise generated during the blasting is repeatedly reflected between each folded gap of the nonwoven fabric (4, 4b) and noise is generated. The amount of noise transmitted to the residential area near the construction site can be reduced as much as possible.