Methods and apparatus for loading a borehole with explosives

Details Methods and apparatus for loading a borehole with explosives Methods and apparatus for loading a borehole with explosives

1984-03-21

1986-02-25

Nelson, Peter A.

Ammunition and explosives

Blasting

Borehole loading

102312, 102323, 102324, 102331, 102333, F42B 300

Patent

active

045720754

ABSTRACT:
A method and apparatus for delivering an explosive to the bottom of a borehole containing water without allowing a detrimental amount of mixing between the explosive and the water. More particularly, the present invention allows an ammonium nitrate rich bulk explosive to be placed in a borehole without allowing the explosive composition to change significantly through dissolution of its constituents. The apparatus of the present invention includes a length of collapsible tubing having a plurality of apertures near its base and a weight attached to its base. The tubing is then lowered into a borehole. The weight causes the tubing to extend through any water layer within the borehole and the collapsible nature of the tubing serves to keep any significant amount of water from entering the tube. An explosive can then be flowed into the mouth of the tubing and down through the length of the tubing to the bottom of the borehole. At the bottom of the borehole, the explosive exits the tubing through the plurality of apertures.

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"Squeez-Crete Concrete Pumps", Challenge-Cook Brothers, Inc., (1977).
"Challenge Squeez-Crete," Challenge-Cook Brothers, Inc. (1982).

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