Patents Assigned to Rocmec International Inc.
  • Ore extraction using combined blast and thermal fragmentation
    Patent number: 7896443
    Abstract: 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.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: March 1, 2011
    Assignee: Rocmec International Inc.
    Inventor: Donald Brisebois
  • Thermal rock fragmentation application in narrow vein extraction
    Patent number: 7195320
    Abstract: A free-blast method for extracting ore from an ore vein deposit wherein the vein is extracted by causing the ore comprised between the rock walls bordering the vein to spall into fragments. The ore fragments are recuperated as by aspiration and subsequently processed to retrieve the precious mineral.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: March 27, 2007
    Assignee: Rocmec International Inc.
    Inventor: Donald Brisebois
  • Thermal rock fragmentation application in narrow vein extraction
    Patent number: 6913320
    Abstract: A free-blast method for extracting ore from an ore vein deposit wherein the vein is extracted by causing the ore comprised between the rock walls bordering the vein to spall into fragments. The ore fragments are recuperated as by aspiration and subsequently processed to retrieve the precious mineral.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: July 5, 2005
    Assignee: Rocmec International Inc.
    Inventor: Donald Brisebois