Ammunition and explosives – Blasting – Patterned blasting
Patent
1992-10-14
1993-09-28
Nelson, Peter A.
Ammunition and explosives
Blasting
Patterned blasting
102333, F42B 300, F42D 300
Patent
active
052478866
ABSTRACT:
A plug for use in stemming a blast hole having an explosive charge therein. The plug comprises a wedge member and a stabilizing structure on the wedge member. The wedge member tapers in an outward direction from a relatively wide base to a relatively narrow end and has a central axis extending endwise with respect to the wedge member. The stabilizing structure extends generally axially with respect to the wedge member from adjacent the base of the wedge member. The plug is to be positioned in the blast hole with the base of the wedge member facing inwardly toward the explosive charge, with the narrow end of the wedge member facing outwardly toward the mouth of the blast hole, with the central axis of the wedge member generally coincident with the central longitudinal axis of the blast hole, and with the stabilizing structure in close proximity to the side walls of the blast hole. The stabilizing structure is engageable with the side walls of the blast hole for resisting forces tending to tilt the wedge member away from a position in which the central axis of the wedge member is generally coincident with the central longitudinal axis of the blast hole.
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Nelson Peter A.
The Curators of the University of Missouri
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