FIELD: mining.
SUBSTANCE: invention relates to mineral resource industry and can be used at fastening of development drifts by bolting. For this drift is supported by grab made of special profile, which are bolted in separate groups, consisting of anchors, inclined to the side of mouth of working and development face, additionally into this group it is introduced grab with anchors, inclined to the side of drift.
EFFECT: qualitative fastening of development drifts, creation of safe working conditions, cost cutting for fastening of drifts.
3 dwg
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