Method for blasting contour hole of tunnel using paper pipe and detonating cord road slope blasting method and urban bedrock blasting method

摘要

The present invention relates to a method for blasting an outer hole of a tunnel using an explosive, a blasting method for a road slope, and a blasting method for a bedrock in an urban area. The method for blasting the outer hole of the tunnel includes: perforating an outer hole in the tunnel; inserting an explosive into the outer hole; positioning the guiding line adjacent to the explosive and extending it through the outer hole; placing a primer at an end of the guiding line; blasting using the primer; and, the guiding line extends through the inside of the branch tube. According to this configuration, without using expensive precision explosives to blast the perimeter hole of the tunnel, the blasting method of the tunnel perimeter hole and the road method can be carried out at a low cost and in a short time by extending the blasting line into the branch pipe while using general explosives It is possible to provide a surface blasting method and an urban bedrock blasting method.