Increase of efficiency of drilling machines utilization during drilling of small-diameter boreholes at mica mines
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Abstract
At the system of underground development of mica-bearing veins of small and medium thickness with open cleaning space, which is being implemented nowadays, it is necessary to drill vertical or slightly inclined boreholes with a diameter of 50-75 mm and a depth of 15-25 m.
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(Archived) Without section
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None
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