Triggering explosives in holes
AssigneeOlitek Pty Ltd
InventorsAnthony James SPRAGUE, James Thomas OLIVER, Stephen HANWRIGHT
Life of this patent
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Abstract
An assembly (7) for triggering an explosive in a hole (9) to produce an explosive blast in the hole includes (a) an explosion trigger (15, 19) for triggering the explosive in the hole, (b) a detonation unit body (21) that is configured to be located at or proximate an open end of the hole in an initial position of the assembly in the hole and (c) a trigger cord (31) that is connected to the detonation unit body and to the explosion trigger.
Claims41
An assembly for triggering an explosive in a hole to produce an explosive blast in the hole, with the assembly including (a) an explosion trigger for triggering the explosive in the hole, (b) a detonation unit body that is configured to be located at or proximate an open end of the hole in an initial position of the assembly in the hole and (c) a trigger cord that is connected to the detonation unit body and to the explosion trigger.
The assembly defined in any one of the preceding claims being configured to be positioned in the hole at or proximate the open end of the hole in an initial position of the trigger assembly in the hole.
The assembly defined in any one of the preceding claims wherein the detonation unit body has a compartment for housing the explosion trigger in the initial position of the trigger assembly in the hole.
The assembly defined in any one of the preceding claims wherein the detonation unit body includes a retaining means for retaining the detonation unit body at or proximate the open end of the hole.
The assembly defined in any one of the preceding claims wherein the detonation unit body includes a connection unit for providing a connection between the trigger cord and an external detonation activation system.
A detonation unit body of an assembly for triggering explosives in a hole includes:
- (a) a sleeve that is configured to extend into the hole and to receive and support an explosion trigger and a trigger cord of the assembly within the sleeve in an initial position of the trigger assembly in the hole;
- (b) a retaining means (such as a collar at one end of the sleeve that is configured to be located against an exposed face of the rock mass in which the hole is formed) for retaining the detonation unit body in the initial position of the trigger assembly in the hole, with the sleeve extending into the hole and the explosion trigger and the trigger cord housed within the sleeve in the hole,
- (c) a connection unit for providing a connection between the trigger cord and an external detonation activation system that is connected to the explosion cord;
- and
- (d) a mount for receiving and supporting the explosion trigger within the sleeve.
Dependencies are inferred from the claim text.