Blasting method of contour holes in two parts with time delay of 20~25MS

摘要

The invention of the tunnel excavation by properly using the parallax of the tunnel during blasting detonator best results loading non-electric detonator MS 20 on the outskirts of the ball (3) and relates to the blasting method for connection to dopokseon (10). ; For this, the present invention is Gheshm ball (1) around the ball ( 2) The bottom hole (4) comprising the steps of loading a non-electric detonator with conventional methods; Comprising connection with dopokseon 10 by loading electroless MS detonator 20 on the outer ball (3); And the outer ball (3) Wiring Bunch connector (40) in the post configuration, characterized by blasting the entire cross-section with a delay time difference. ; The present invention is configured as a non-electric detonator existing and will allow one to perform the blasting excavation will close the line in the most economical to use, and also, minimizing damage to the surrounding rock mass, and further to increase a blasting efficiency by obtaining the elegant to the wave front of the tunnel wall will.