FIELD: mining.
SUBSTANCE: metallic web arched support of mine openings includes two posts connected to roof bar. To roof bars of primary mine openings from the outside there are fixed two plate-consoles, in the form of L-angle with openings for pins, on which supports and fixed by means of pins roof bar, consisting of two semiarchs, installed at implementation of repeated mine openings.
EFFECT: labour-intensiveness and steel intensity reduction for mine openings fixation.
3 dwg
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