SECTION OF ROOF BOLTING

摘要

mining industry. SUBSTANCE: invention is designed to support underground headings with roof bolting. Section of roof bolting includes welded metal grate made of longitudinal bearing and transverse linking bars, anchors and pickup. The latter comes in the form of two parallel rods made fast to bearing bars of grate which are parallel to linking bars and placed at distance of value of grate spacing from edge of section. Ends of rods of pickup are bent in the form of hooks on one side. Diameter of rods of pickup can be not less than diameter of anchor and distance between them should be not less than diameter of hole drilled for installation of anchor. Linking bars of grate can be located above bearing bars. Rods of pickup can be linked to bars of grate with the aid of welding. EFFECT: enhanced bearing capacity of roof bolting and reduced labor input into its installation. 3 cl, 1 dwg