Controlled rock blasting method utilizing electric detonator and non electric detonator

摘要

The present invention relates to a control blasting method using an electric primer and a non-electric primer,;A controlled blasting method for blasting a rock in a tunnel blasting, the control blasting method comprising: drilling a plurality of charge holes to a predetermined depth in a predetermined arrangement in the rock (S10); After drilling, the detonation order is set for each charge and the detonation order of the primer is set accordingly, and the non-electrical detonator (6) is a rapid non-electrical detonator having a delay time of "0ms" inserted into the outer hole (3). In order to detonate this, the detonation order of the outer hole (3) is finally detonated out of the detonation order of the entire charge hole except the bottom hole (4) by combining the detonation time of the external electric primer (7) connected from the outside of the charge hole. Setting the step (S20); Insert the non-electric primer (6) into the outer hole (3) in the charge air in accordance with the detonation order and parallax, and the general electric primer in the heart hole (1), enlarged hole (2), the bottom hole (4) Performing a charging operation for mounting explosives after insertion (S30); The non-electric primer 6 inserted into the periphery 3 is a bundle of two or more, and the non-electric primer in accordance with the detonation order and parallax to the external electric primer 7 installed separately to detonate it Connecting to the signal tube (8) of (6) (S40); The external electric primer 7 connected to the signal tube 8 of the non-electric primer 6 inserted into the outer hole 3 and the cardiac hole 1, the enlarged hole 2, and the bottom hole 4. And connecting the inserted general electric primers to each other and finally connecting the igniter to detonate the explosive according to the detonation order and parallax (S50).;The parallax of the non-electric primer inserted in the perforator is “0ms” by detonating two or more non-electric primers inserted in the periphery by connecting them to an external electric primer installed separately to detonate them. In this case, the detonation speed of the signal tube of the non-electric primer is slightly neglected to provide a stress concentration effect due to the simultaneous detonation, and as a result, it is possible to control the crack area due to the blasting on the tunnel wall surface.