Blasting Method Using a Control Device for Inducing a Blast Pressure, and Control Device for Inducing the Blast Pressure to Apply the Method

Abstract

The present invention relates to a blasting method using a control device for inducing a blast pressure, and a control device for inducing the blast pressure to apply the method. According to the blasting method using the control device for inducing the blast pressure, when a blasting operation is performed at the outermost hole of a tunnel or a wayside or wall surface of a structure constructed at a location in which an adjacent structure of a downtown area is located, a transfer path of the blast pressure is controlled using the control device for inducing the blast pressure so that the blast pressure does not exceed a proposed blast line, but is limitedly transferred into only a blasting area. Thus, a smooth and elegant blasted surface may be secured, and simultaneously, an over-break may be prevented and vibration and noises may be minimized. According to the present invention, since a general inexpensive explosive is loaded into a blasting prevention cover and easily utilized, the general inexpensive explosive may be replaced with an existing expensive precision explosive to significantly reduce blasting costs and improve blasting efficiency, thereby having a large economic impact and useful effects.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Korean Patent Application No. 10-2011-0014967, filed on Feb. 21, 2011 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to an innovative blasting technique wherein at the time of blasting operation of outermost holes of a tunnel or road surface and wall surface and the like of a site where adjacent structures are positioned in a city, a transmission path of the blast pressure can be controlled in such a way that the blast pressure does not exceed a predetermined blast line by means of a blast pressure-guiding control device, but is limitedly transmitted only to a blast area, whereby more smooth and fine-looking blast surface is obtained and also overbreak can be prevented and vibration and noise can be minimized.BACKGROUND ART[0003]In general, construction work and engineering work are key industri...

AI Technical Summary

Benefits of technology

The present invention provides a method for blasting that prevents overbreak and minimizes vibration and noise. This is achieved by using blast pressure-blocking covers that partially wrap only one side of the explosive and face the predetermined blast line, blocking the transmission of blast pressure to the line and limiting it to the blast area. The use of low-priced conventional explosive in the covers increases blast efficiency while reducing blast cost.

Problems solved by technology

As already known, general blasting method is a method in which circular blast holes are drilled and then the explosive is loaded in the center of the hole to be blasted, wherein since uniform blast pressure is applied to the whole hole walls of the blast holes, there are problems that, especially in constructing of a tunnel, cross section of the tunnel is not smooth and is uneven, blast vibration and noise are severe and thus the blast pressure exceeds the predetermined blast line of the tunnel, therefore the tunnel is further excavated, which results in occurrence of overbreak.

Up to now, as such a method for controlling the blast pressure, there are proposed a method wherein position of free surface and interval between holes are properly adjusted, decoupling explosive loading method etc., however, these method have disadvantages that they cost a great deal and their control effects are not so high.

However, in such a case, there is a problem that since the whole impact effect of the explosive is decreased, the inside of the predetermined blast hole (blast area) is subject to shortage of the blast pressure blast line on the contrary and thus underbreak is occurred, and it is the actual circumstances that there is provided an insignificant effect that only occurrence area of the overbreak is slightly decreased as compared to the existing blasting method.

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