A smooth blasting peripheral hole detonation cord-free initiation process and charge structure

Abstract

This invention discloses a non-detonating cord initiation process and charging structure for smooth blasting with peripheral holes. It is used during tunnel excavation, where multiple blast holes are set, including multiple slotting holes, auxiliary holes, and peripheral holes. The peripheral holes are arranged along the tunnel contour, the slotting holes are located at the center of the tunnel contour, and the auxiliary holes are located between the peripheral holes and the slotting holes. Multiple evenly spaced emulsion explosive cartridges are placed within the slotting holes, auxiliary holes, and peripheral holes. The emulsion explosive cartridges are fixed to a blasting rod. The openings of the slotting holes, auxiliary holes, and peripheral holes are filled with drilling mud. One of the emulsion explosive cartridges contains a digital electronic detonator. This invention utilizes the sympathetic detonation characteristics of emulsion explosives and designs a reasonable charging structure to achieve effective detonation without detonating cords, thereby improving blasting efficiency, reducing costs, and improving tunnel formation quality.

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