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Vol 99
Pages:
112-116
Download volume:
RUS
Article

Increase of efficiency of drilling machines utilization during drilling of small-diameter boreholes at mica mines

Authors:
K. P. Khmyznikov
Date submitted:
1983-07-08
Date accepted:
1983-09-25
Date published:
1984-12-06

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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