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.

1 . A blasting method using a blast pressure-guiding control device, wherein a blast pressure-guiding control device is provided which comprises blast pressure-blocking covers of circular cross section formed with blast pressure-guiding passage partially open on one side of the covers along the longitudinal direction thereof and with explosive-loading part inside the blast pressure-guiding passage; a second wall and third wall of curved surface form successively and integrally formed on inner side of the blast pressure-blocking covers; and cover-assembling means comprising a coupling projection protrudingly formed integrally with the second wall on one longitudinal side thereof, extending outwardly therefrom, and a coupling groove formed recessed inwardly from the second wall on the other side thereof,
 and wherein the blasting method comprises:
 explosive-loading step wherein the explosive ( 1 ) is loaded in each of a plurality of blast pressure-blocking covers formed with a blast pressure-guiding passage therein and thereafter the explosive is fixed by wrapping it with connecting bands; 
 cover-assembling step wherein the plurality of blast pressure-blocking covers are longitudinally connected and assembled by fitting the coupling projection formed on one side of the blast pressure-blocking cover into the coupling groove of another blast pressure-blocking cover; 
 cover-installing step wherein the plurality of connected and assembled blast pressure-blocking covers are inserted and installed in blast holes so as to face a predetermined blast line in the state of detonator leg line connected to one of the explosives being exposed to the outside of the blast hole; 
 tamping-charging step wherein the tamping is charged in the blast holes; and 
 detonator leg line-connecting and blasting step wherein the detonator leg line is integrally connected with blast mother line and thereafter the explosive is blasted. 
   
     
     
         2 . The blasting method using a blast pressure-guiding control device according to  claim 1 , wherein the detonator connected to a tip of the detonator leg line is integrally connected with the explosive of a centrally-located blast pressure-blocking cover of the plurality of connected and assembled blast pressure-blocking covers, and the detonator leg line is disposed so as to be exposed to the outside while running along a gap between inner surface of the blast pressure-blocking cover and the explosive. 
     
     
         3 . A blast pressure-guiding control device, comprising:
 blast pressure-blocking covers of circular cross section formed with blast pressure-guiding passage partially open on one side of the covers along the longitudinal direction thereof and with explosive-loading part inside the blast pressure-guiding passage;   a second wall and third wall of curved surface form successively and integrally formed on inner side of the blast pressure-blocking covers; and   cover-assembling means comprising a coupling projection protrudingly formed integrally with the second wall on one longitudinal side thereof, extending outwardly therefrom, and a coupling groove formed recessed inwardly from the second wall on the other side thereof.   
     
     
         4 . A blast pressure-guiding control device, comprising:
 blast pressure-blocking covers of circular cross section formed with blast pressure-guiding passage partially open on one side of the covers along the longitudinal direction thereof and with explosive-loading part inside the blast pressure-guiding passage; and   a second wall of curved surface form integrally formed on inner side of the blast pressure-blocking covers.   
     
     
         5 . A blast pressure-guiding control device, comprising blast pressure-blocking covers of circular cross section formed with blast pressure-guiding passage partially open on one side of the covers along the longitudinal direction thereof and with explosive-loading part inside the blast pressure-guiding passage. 
     
     
         6 . The blast pressure-guiding control device according to  claim 3 , wherein a plurality of buffering projections are equidistantly and protrudingly formed on outer circumferential surface of the blast pressure-blocking cover. 
     
     
         7 . The blast pressure-guiding control device according to  claim 3 , wherein a plurality of buffering projections and are equidistantly and protrudingly formed on outer circumferential surfaces of the second wall and third wall, and air layers and are formed between the buffering projections and between the buffering projections, respectively. 
     
     
         8 . The blast pressure-guiding control device according to  claim 4 , wherein a plurality of buffering projections are equidistantly and protrudingly formed on outer circumferential surface of the second wall, and air layers are formed between the buffering projections. 
     
     
         9 . The blast pressure-guiding control device according to  claim 3 , wherein a lock with inclined surface is protrudingly formed on a tip of inner surface of the coupling projection, and the lock is fittedly coupled with a locking hole formed through the third wall while being connected with the coupling groove. 
     
     
         10 . The blast pressure-guiding control device according to  claim 3 , wherein one end portion of the plurality of connecting band for fixing the explosive by wrapping the same is integrally fixed on one side of the outer circumferential surface of the blast pressure-blocking cover, and adhesive is applied on the other end portion of the connecting bands, and an release paper is attached on a surface on which the adhesive is applied. 
     
     
         11 . The blast pressure-guiding control device according to  claim 4 , wherein a plurality of buffering projections are equidistantly and protrudingly formed on outer circumferential surface of the blast pressure-blocking cover. 
     
     
         12 . The blast pressure-guiding control device according to  claim 5 , wherein a plurality of buffering projections are equidistantly and protrudingly formed on outer circumferential surface of the blast pressure-blocking cover. 
     
     
         13 . The blast pressure-guiding control device according to  claim 4 , wherein one end portion of the plurality of connecting band for fixing the explosive by wrapping the same is integrally fixed on one side of the outer circumferential surface of the blast pressure-blocking cover, and adhesive is applied on the other end portion of the connecting bands, and an release paper is attached on a surface on which the adhesive is applied. 
     
     
         14 . The blast pressure-guiding control device according to  claim 5 , wherein one end portion of the plurality of connecting band for fixing the explosive by wrapping the same is integrally fixed on one side of the outer circumferential surface of the blast pressure-blocking cover, and adhesive is applied on the other end portion of the connecting bands, and an release paper is attached on a surface on which the adhesive is applied.