METHOD FOR INSTALLATION OF SUPPORT OF MINE WORKING AND SUPPORT FOR ITS REALIZATION Russian patent published in 1995 - IPC

FIELD: mining. SUBSTANCE: mine working support has roofing, ledger, prop, girder and thrust bearing, yielding units, sockets of joint of girder and thrust bearing with prop, joints of girders with one another. Girders are made of T-member with wall upward and sockets consisting of retainer and beads located on T-member flange which has cutout to receive special section bottom plate. Cutout faces working space. Installed between flange and retainer is bottom plate of prop end of special section, beads are adjacent to special section outer walls resting on berms left for the purpose from beads to cutout edges. Cutout extends to retainer whose thickness equals gas between bottom plates of connected special sections for connections to prop by overlapping lower bearing member of frame without removal of girder. EFFECT: higher efficiency. 4 cl, 12 dwg