MINE SECTIONS FOR MANUFACTURE OF METAL SUPPORT OF MINE WORKINGS Russian patent published in 2002 - IPC

FIELD: mining; applicable in support of mine workings. SUBSTANCE: interchangeable mine hot-rolled metal sections for support of development workings consist of bottom, walls and flanges. Section has the following overall dimensions for type-size of 18 kg/m: height h=82.0 mm, width b₁=130.8 mm, total width with flanges b=294.1 mm, thickness of bottom, walls and flanges d=6.5 mm, d₁=5.0 mm, h₁=6.5 mm, respectively. EFFECT: reduced volume of excavated muck of mine working with ensured required parameters of cross-section area and strength characteristics. 1 dwg, 2 tbl