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Gold/Mining/Energy : Gold and Silver Juniors, Mid-tiers and Producers

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To: E. Charters who wrote (37988)	4/10/2007 6:31:36 PM
From: hank2010	Read Replies (1) of 78417

"do you trust a sinking cut with only one relief hole?" I reckon they figure if it works why change? And to drill that large diameter hole they were putting on a DTH hammer thus going as deep as they could before shifting back to the top hammer. I would not want to spot 3 holes close together without them deviating and breaking into each other in a 400 foot hole, and possibly losing the hammer. Bull bit holes - 2 and 1/8 inch diam.?? 3 of them will only give you 10.6 sq inch in X-Section, one 8 inch diam. will give you 50 sq. inches, so looks like they are already in overkill mode. As for throw, one would want to minimize that so that damage is not done to the Galloway and the gear on it. That is one short coming of the full face blasting as opposed to benching, but I guess they keep it back far enough to make it livable. I can not tell you all there is to know about drilling, but I worked with some mighty fine fellows who know a lot more than I. One of the best of them went up to work for the contractor sinking the shaft near the Sudbury airport. Falco's Nickel Rim??? apparently he was on the bottom when a hydraulic hose developed a leak and sprayed on one of the flood lights. The fluid immediately caught fire and was being fed by a continuing stream of fluid and air from the vent fan. They signalled surface that there was a fire but he realized they would all perish before help arrived. He climbed through the flames and shut off the vent fan. The lack of oxygen caused the flames to go out, the lights were out either because of the flames, or he turned them off, and the fluid cooled them. He stood by the vent fan controls until on the verge of passing out. He turned on the fan, blacked out, and was unconscious when help arrived and the crew was rescued. He was hospitalized for some time with severe burns, but survived. Not only a brave man, but a very smart one to figure out what to do to save himself and the rest of the crew.

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