Method for loading slurry explosives in blast holes or cartridges
AssigneeDyno Nobel ASA
InventorJan Hans Vestre
Life of this patent
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Abstract
A method for loading and sensitizing a slurry explosive in a borehole or in a cartridge, where a gassing agent is added as a thin string inside the slurry explosive after the explosive has been pumped into a loading pipe, and wherein the slurry explosive and a gassing agent are mixed at the end of the loading pipe and sensitized in the borehole or the cartridge. Optionally the loading pipe is lubricated with water or a water solution to reduce the pump pressure.
Claims16
A method of loading and sensitizing a slurry explosive in a borehole, comprising the steps of:
- pumping an unsensitized slurry explosive into a loading pipe to form a stream of unsensitized slurry explosive,
- adding a gassing agent in the form of a thin stream into the center of the stream of unsensitized slurry explosive, and
- mixing the unsensitized slurry explosive and the gassing agent at the end of the loading pipe disposed within the borehole,
- wherein the unsensitized slurry explosive is sensitized into a final slurry explosive as it enters the borehole.
A method of filling and sensitizing a slurry explosive in a shell or cartridge, comprising the steps of:
- pumping an unsensitized slurry explosive into a loading pipe to form a stream of unsensitized slurry explosive,
- adding a gassing agent in the form of a thin stream into the center of the stream of unsensitized slurry explosive, and
- mixing the unsensitized slurry explosive and the gassing agent at the end of the loading pipe disposed within the shell or cartridge,
- wherein the unsensitized slurry explosive is sensitized into a final slurry explosive as it enters the shell or cartridge.
Dependencies are inferred from the claim text.