LOADING OF BOREHOLES WITH EXPLOSIVES

摘要

Explosive cartridges are loaded into boreholes at a rapid rate by guided descent through a retractable flexible tubing assembly through which a stream of water flows. The cartridges preferably are cut open just before their discharge from the assembly, and their passage through, or discharge from, the assembly is detected outside the borehole. The assembly is retracted incrementally until completion of the-loading. Apparatus comprising a cartridge-guiding assembly through which a stream of water flows, and means associated with the assembly for sensing cartridge passage or discharge.