TUBULAR ANCHOR AND METHOD FOR INSTALLATION THEREOF Russian patent published in 1994 - IPC

FIELD: supporting of mine workings. SUBSTANCE: anchor is comprised of a pipe whose diameter is larger than that of hole and which is slit throughout its length along helical line. The pitch of said line grows to the head end of pipe. Pipe extension is provided with support ring for plate while head end has a stop for assembly rod. Before installation in the hole the anchor cut along helical line is twisted within the limits of flexible deformation and inserted in a spaced relation into the holes. Then anchor is secured by relieving deformation. EFFECT: higher operating reliability of anchor and possibility of its repeated use. 3 cl, 5 dwg