US 12,066,278 B2
Triggering explosives in holes
Anthony James Sprague, Melbourne (AU); James Thomas Oliver, Melbourne (AU); and Stephen Hanwright, Queensland (AU)
Assigned to Newcrest Mining Limited, Melbourne (AU)
Appl. No. 17/612,702
Filed by Olitek Pty Ltd, Northgate (AU)
PCT Filed May 21, 2020, PCT No. PCT/AU2020/050500
§ 371(c)(1), (2) Date Nov. 19, 2021,
PCT Pub. No. WO2020/232506, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 2019901712 (AU), filed on May 21, 2019; and application No. 2019902752 (AU), filed on Aug. 1, 2019.
Prior Publication US 2022/0282958 A1, Sep. 8, 2022
Int. Cl. F42B 3/02 (2006.01); E21C 37/00 (2006.01); E21D 9/00 (2006.01); F42B 3/10 (2006.01); F42B 3/26 (2006.01); F42D 1/02 (2006.01); F42D 1/08 (2006.01)
CPC F42B 3/02 (2013.01) [E21C 37/00 (2013.01); E21D 9/006 (2013.01); F42B 3/10 (2013.01); F42B 3/26 (2013.01); F42D 1/02 (2013.01); F42D 1/08 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An assembly for triggering an explosive in a hole to produce an explosive blast in the hole, the assembly comprising:
(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,
wherein the detonation unit body comprises a mount that receives and supports the explosion trigger in the initial position.