METHOD OF MOUNTING IN BLAST TUBULAR ANCHOR WITH CIRCULAR CROSS SECTION AND ANCHOR THEREFOR Russian patent published in 2016 - IPC E21D20/00 

FIELD: mining.

SUBSTANCE: group of inventions intended for use in strengthening walls of mine workings. By method pipe is made with external diameter exceeding that of blast hole, longitudinal groove along its whole length and front end of conical shape. Support plate is put on pipe. Part of pipe extending beyond support plate to its rear end is divided into sectors with longitudinal slots. At that, part of sectors of pipe is made with surfaces, forming parts of which are parallel to longitudinal axis of pipe. Other part of sectors is made with surfaces, forming parts of which are not parallel to longitudinal axis of pipe and form cone vertex directed to support plate. Set tube rear end part of its sectors in annular groove of striker. Under action of axial force through striker is introduced into blast pipe front end of conical shape. During introduction of pipe in blast striker formed stops of supporting plate of sectors of pipe at different distance from its longitudinal axis.

EFFECT: higher reliability and operation of tubular anchor.

2 cl, 5 dwg