Shell for housing an explosive material for use in mining

Patent metadata

Field	Value
Publication number	US-10466018-B2
Application number	US-201515322800-A
Country	US
Kind code	B2
Filing date	Jul 1, 2015
Priority date	Jul 2, 2014
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

A shell for use in blasting, the shell comprising an elongated body, the elongated body having a distal end arranged for housing an explosive material, a proximal end arranged to permit introduction of at least one detonator into an interior of the shell, and a cavity for holding the at least one detonator in a location in which operation of the detonator results in explosion of the explosive material, wherein a slot is provided in a sidewall of the shell to allow an activation lead connected to the detonator to pass through the slot to an exterior of the shell, and wherein the slot includes at least one retaining protrusion to retain the activation lead against withdrawal of the activation lead from the slot.

First claim

The claims defining the invention as follows:

1. A shell for use in blasting, the shell comprising an elongated body, the elongated body having a distal end arranged for housing an explosive material, a proximal end arranged to permit introduction of at least one detonator into an interior of the shell, and a cavity for holding the at least one detonator in a location in which operation of the detonator results in explosion of the explosive material, wherein a slot is provided in a sidewall of the shell to allow an activation lead connected to the detonator to pass through the slot to an exterior of the shell, wherein the slot extends longitudinally along the sidewall and wherein the slot includes a plurality of retaining protrusions along the slot to retain the activation lead against withdrawal of the activation lead from the slot, the retaining protrusions being spaced along the length of the slot to provide a plurality of spaced positions along the length of the slot at which the activation lead can be retained to allow positioning of detonators of different lengths.

2. A shell as claimed in claim 1 , wherein the retaining protrusions are at regular spaced intervals along the slot.

3. A shell as claimed in claim 1 , wherein the retaining protrusions are along only one side of the slot and an opposite side of the slot includes a smooth wall adapted to bear against the activation lead while the activation lead is drawn inwardly along the slot past one or more of the retaining protrusions.

4. A shell as claimed in claim 1 , wherein the retaining protrusions are barbed to facilitate movement of the activation lead into the slot and to restrain the activation lead against movement out of the slot.

5. A shell as claimed in claim 1 , wherein the slot includes a proximal barb on an opposite side of the slot to the retaining protrusions and wherein the proximal barb laterally overlaps the retaining protrusion across the width of the slot.

6. A shell as claimed in claim 1 , wherein the elongated body is arranged for insertion and explosion in a hole.

7. A shell as claimed in claim 1 , wherein the retaining protrusions are adapted to hold the detonator in a location in which operation of the detonator results in explosion of the explosive material.

8. A shell as claimed in claim 1 , wherein the retaining protrusions are adapted to hold a range of detonators of different lengths in a location in which a distal end of the detonator is positioned against an end of the cavity such that operation of the detonator results in explosion of the explosive material.

9. A shell as claimed in claim 8 , wherein the retaining protrusions are adapted to accommodate detonators ranging from a length of 64 mm to 99 mm.

10. A shell as claimed in claim 1 , wherein the slot extends longitudinally along the sidewall from an opening of the slot at the proximal end of the sidewall.

11. A shell as claimed in claim 1 , wherein the activation lead is in the form of an activation wire.

Assignees

• Orica Int Pte Ltd

Inventors

• Boos Thomas
• Wen Yu

Classifications

• F42D1/043

  Connectors for detonating cords and ignition tubes, e.g. Nonel tubes (mounting of detonators in blasting cartridges F42B3/26) · CPC title

• F42B3/26 Primary

  Arrangements for mounting initiators; Accessories therefor, e.g. tools · CPC title

• F42D3/04

  for rock blasting · CPC title