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Recent content by boomer

  1. boomer

    Perimeter blasting in shaft sinking

    Digger Tracing of repump (bulk) emulsion used in shaft sinking is becoming common practice in N. Canada. The idea isn't side initiation as in anfo loaded holes but destruction of a portion of the sensitizing glass or gas bubbles in the emulsion. Burden and spacing are constantly reviewed as...
  2. boomer

    Perimeter blasting in shaft sinking

    does anyone have experience with perimeter blasting in u/g shaft sinking by tracing re-pump emulsion loaded holes with detonating cord? 25 or 50 gn
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