摘要:
A method of mining a mineral deposit, including: setting, at a first set of spaced pre-blast locations in the deposit, a plurality of primary explosive charges suitable for fragmenting the deposit on being collectively exploded; setting, at a second set of spaced pre-blast locations in the deposit, a plurality of secondary explosive charges suitable to be acoustically and/or seismically detectable on being activated; exploding the primary explosive charges to fragment the deposit; shortly thereafter activating the secondary explosive charges; and detecting the post-blast locations of the secondary explosive charges by acoustically and/or seismically detecting their response to activation.
摘要:
A method of producing a thickened emulsion explosive, which method comprises reacting in an emulsion explosive an amine compound and an α,β-unsaturated carbonyl compound such that thickening of the emulsion explosive occurs.
摘要:
A method of deactivating an explosive composition provided in an explosive cartridge, which method comprises exposing the explosive composition to a deactivating agent that renders the explosive composition insensitive to detonation, wherein the deactivating agent is a plant.
摘要:
Electronic blasting systems typically permit blasting with detonator delay times having millisecond accuracy. Disclosed herein are blasting apparatuses and methods of blasting that are capable of even higher degrees of delay time accuracy, for example involving programmable delay times selectable to an accuracy of about 0.1ms, or better. Such methods and apparatuses present unprecedented and unexpected advantages for both mining applications, civil engineering uses, and in seismic prospecting.
摘要:
Primer casing (1) comprising sleeve portion (5) and leading portion (5a), wherein sleeve portion (5) includes tabs (6) to retain primer (11) and blasthole engagement means (2), and wherein leading portion (5a) comprises nose cone (8). Engagement means (2) comprises an array of rigid, multiple projections that are hinged and movable between a retracted position and a blasthole engagement position. Explosive loading hose (13) locates within hose receiving sleeve (7) and can be used to push primer casing (1) into the desired location within the blasthole prior to filling the blasthole with bulk explosive. Methods of loading a blasthole comprising inserting primer (11) into primer casing (1) and positioning primer casing (1) at a desired location in a blasthole are also described and claimed.