E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
E21C 41/22 (2006.01) E21C 37/00 (2006.01)
Patent
CA 2695658
A process for extracting ore from a vein (10) comprises drilling spaced-apart boreholes (16) directly in the vein (10). The boreholes (16) are enlarged using thermal fragmentation generally up to the boundaries between the vein and surrounding waste. A blasthole (18) is then drilled in the vein between the thermally enlarged boreholes (17) for placement of explosive. The explosive is fired to break the ore between the enlarged boreholes (17). The enlarged boreholes (17) act as weakening regions to direct the blasting effect and minimize dilution.
L'invention concerne un procédé pour extraire du minerai d'un filon (10). Le procédé consiste à forer des trous de forage espacés (16) directement dans le filon (10); à agrandir les trous de forage (16) par fragmentation thermique, généralement jusqu'aux frontières du filon et de l'arrière-taille environnant; à forer un trou de mine (18) dans le filon entre les trous de forage thermiquement agrandis (17) pour mettre l'explosif en place; à mettre l'explosif à feu pour rompre le minerai entre les trous de forage agrandis (17) qui servent de zones d'affaiblissement pour diriger l'effet d'explosion et rendre la dilution minimale.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Rocmec International Inc.
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