Method for charging flowable explosives into upwardly extending

Ammunition and explosives – Blasting – Patterned blasting

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Details

102313, 86 2013, F42D 300

Patent

active

048299022

ABSTRACT:
A method is provided for loading upwardly extending boreholes in rock with flowable bulk explosives. An explosives loading pipe, an air exhaust pipe and an initiating booster charge with associated initiator are located in the borehole so that the booster and the pipe ends are located deep within the borehole. The ends of the pipes and the initiator are pressed through one or more channels in a cylindrical plug wedged in the borehole opening. Stemming material is first placed in the borehole through the loading pipe to lie against the plug and thereafter the bulk explosive is introduced to fill the borehole. Entrapped air is exhausted through the exhaust pipe.

REFERENCES:
patent: 3111059 (1963-11-01), Marsh
patent: 4040355 (1977-08-01), Hopler, Jr.
patent: 4421004 (1983-12-01), Hallstrom et al.
patent: 4485739 (1984-12-01), Emmett
patent: 4572075 (1986-02-01), Day et al.
patent: 4614146 (1986-09-01), Ross et al.

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