The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2016
Filed:
Sep. 29, 2010
Stuart Patrick Thomson, Singapore, SG;
Sean Michael Freeman, Leederville, AU;
Stuart Patrick Thomson, Singapore, SG;
Sean Michael Freeman, Leederville, AU;
ORICA EXPLOSIVES TECHNOLOGY PTY LTD, Melbourne, Victoria, AU;
Abstract
A method of blasting rock at an underground blast site in which boreholes () are drilled in a rock mass () from a drive defining face (), each borehole is loaded with at least one charge of explosive material (---), at least one detonator is placed in operative association with each charge, and a sequence of at least two initiation events is conducted to blast the rock mass, in each of which only some of the charges are initiated, by sending firing signals to only the detonators associated with said charges and in which each initiation event is a discrete user-controlled initiation event. In one of the at least two initiation events a stranded portion of the rock mass such as a pillar is created that has already been drilled and charged, and the stranded portion of the rock mass is blasted in a subsequent one or more of the at least two initiation events without personnel accessing said stranded portion. First explosive charges (and) may be blasted in the one initiation event, leaving a pillar of stranded ore with the preloaded borehole () extending through it. The detonators may be wireless.