METHOD OF FLOOR BOLTING Russian patent published in 2001 - IPC

FIELD: mining; applicable in bolting of mine working floor rocks. SUBSTANCE: method includes placing into borehole of loop from flexible thread with bracing lock and supporting plate on outlet ends; tensioning of anchor by twisting of flexible threads by rotation of supporting plate with the help of tool located in central hole of supporting plate. Central hole is used for filling of borehole with sand-cement mixture and ends of flexible thread are fixed in other holes of supporting plate. EFFECT: reduced displacement of rocks, low labour input in formation of floor bolting and undermining of anchored rocks. 2 dwg