US 12,241,730 B2
Method and apparatus for preventing rock fragments from entering or collapsing into a blast hole
Gregory Patching, Attadale (AU)
Assigned to TBS MINING SOLUTIONS PTY LTD, Perth (AU)
Filed by AQUIRIAN TECHNOLOGY PTY LTD, Perth (AU)
Filed on Feb. 6, 2023, as Appl. No. 18/106,040.
Application 18/106,040 is a continuation of application No. 17/499,088, filed on Oct. 12, 2021, granted, now 11,598,620.
Application 17/499,088 is a continuation of application No. 16/632,836, granted, now 11,175,119, issued on Nov. 16, 2021, previously published as PCT/AU2018/050752, filed on Jul. 18, 2018.
Claims priority of application No. 2017902834 (AU), filed on Jul. 19, 2017; application No. 2017903102 (AU), filed on Aug. 4, 2017; application No. 2017903341 (AU), filed on Aug. 18, 2017; and application No. 2017904880 (AU), filed on Dec. 4, 2017.
Prior Publication US 2023/0184528 A1, Jun. 15, 2023
Int. Cl. F42D 1/22 (2006.01); F42D 3/04 (2006.01)
CPC F42D 1/22 (2013.01) [F42D 3/04 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A deployment device for deploying into a blast hole, for preventing surrounding loose rock fragments from falling or collapsing into the blast hole, the device including
a forming apparatus adapted to form a flat flexible sheet into a curved form for insertion into an open end of a blast hole whereby the curved sheet closely faces an internal surface of the blast hole forming a barrier preventing surrounding loose rock fragments from falling or collapsing into the blast hole, and
a store of a plurality of the sheets arranged in a stack.