Single and complex free surface in phase expansion and a series of free surface blasting method using a differential delay

摘要

According to the present invention, disclosed is an explosion construction method for phase and serial expansion of a free face, using a differential delay in a single and complex free face. The explosion construction method comprises: a step of determining an area to be exploded in a free face; a step of determining an explosion centripetal position in a range of the determined explosion area, and perforating a center explosion charge hole in the determined position; a step of perforating a plurality of outer explosion charge holes at intervals outside the center explosion charge hole so that the outer explosion charge holes are grouped together in a band group; and a step of sequentially igniting explosives filled in the explosion charge holes to have a differential delay in accordance with a predetermined ignition order. Thus, the present invention may provide an eco-friendly explosion construction method that causes small explosion pollution, such as vibration, noise, and scattering, when the explosion construction is performed.