TUBING Russian patent published in 2004 - IPC

FIELD: fixing of mine workings and facilities employed for fixing. SUBSTANCE: tubing utilized to support mine working includes circular tubing sections of convex curvature with outer wall, bearing radial-circular and axial-radial ribs with holes facing space of tubing, axial load-carrying members and joining bar threaded members. Axial -radial ribs of tubing's are provided with straps with unidirectional inclined bearing surfaces put on them on side of recesses. Axial load-carrying members come in the form of wedges with double-sided inclined bearing surfaces which are placed between tubing's fitting snugly with their surfaces to side surfaces of axial-radial ribs of tubing's to create effect of joint jamming of axial-radial ribs and tubing's and fastening by means of bar threaded members through holes in them. Tubing sections, axial load-carrying members and straps of axial-radial ribs are made of laminated plastic based on reinforcing fabric or unidirectional material produced from glass, basalt or carbon fibers or their combination and polymer binder containing epoxy, polyester or vinylester with volumetric content of reinforcing fabric and polymer binder from 1: 0.2 to 1:0.5. EFFECT: enhanced operational reliability, decreased time of assembly operation, convenient attendance. 8 cl, 12 dwg