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Gold/Mining/Energy : Winspear Resources

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To: Dave M who wrote (17060)	3/28/1999 8:18:00 PM
From: jack hampton	Read Replies (4) of 26850

Dave M..... You inject grout through the centre of the drill pipe as you retract it from the hole. Put a fixed volume in by gravity, pull a couple of rods, then do it again. The Midwest Lake deposit has been ruined by a company that did not do this. Hudson Bay's Namew Lake near Flin Flon, intersected a few hundred gallons per minute in an ungrouted diamond drill hole a few years back. They had to send divers to the bottom of the lake to find the hole. It wasn't hard>> there was a big funnel in the mud around it. Gord>> About mechanical mining.... If the dyke was flat this would be possible using a roadheader (Voest-Alpine AM75 or Dosco for instance) like the coal mines. Not so sure about dipping seams though. The granite above and below would chew up the drill bits I'm afraid. Red>> Is a 3.475mm diameter diamond significant? Is there some sort of cut off size at which nothing makes gem quality? I'm come across discussion about a feeder pipe. Would this not show up on a mag survey if it existed?

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