Explosives
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"April 3, 1966, Leadville, Colo. Homestake Dam. M-K Co., Inc. [Morrison-Knudsen]. Coyote Shot, 850,000 cubic yards."
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"Red line [midfield, left], estimated shot area; 3,800' of coyote hole explosives in 4 months."
3) Drilling
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Miner using a compressed air rock drill at the Gilman Mine. A battery operated miner's light is attached to his helmet, with the cord running to the light.
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Tamping in dynamite prior to blasting a section at Gilman. Holes that have been prepared are shown with electrical connections to the blasting caps and the dynamite. Joe Fear prepared the blasting caps on the surface. Bottom series of holes were detonated first to keep the miners from having to work so much loose debris - a true demonstration of the principle of gravity.
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"Homestake Dam. The material from the last Coyote-hole blast is about cleaned up. The shovels are working on the far end of the blast zone. The lower quarry bench and ramp is now covered with water. The upper two benches have been dug out by working from 2 headings on each level and now are used as the haul roads for the far end. Aug. 1966."
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"Homestake Dam first coyote-hole blast to open the quarry for the dam's rock fill material; consumed 13 ton of explosives."
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Miner's helper assisting with tamping dynamite prior to blasting the exposed rock face. Both miners have the battery powered safety lights connected by the long cord to a pouch on their waists.
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Tamping in dynamite prior to blasting a section at Gilman. Holes that have been prepared are shown with electrical connections to the blasting caps and the dynamite. Joe Fear prepared the blasting caps on the surface. Bottom series of holes were detonated first to keep the miners from having to work so much loose debris - a true demonstration of the principle of gravity.
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Inserting dynamite into a drill hole prior to blasting at Gilman.
11) Drilling
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Drilling prior to adding dynamite to blast a section for mining at Gilman. Protective clothing was worn to keep the driller from being injured by debris, but we see no eye safety wear.
