ANCHOR FOR FIXATION OF MINE WORKINGS Russian patent published in 2015 - IPC E21D21/00 

FIELD: mining.

SUBSTANCE: device includes a hollow anchor, in the lower part of which there is an outer thread, and in the upper part there are at least two cuts to the distance of at least 0.1 of a rod length. In the upper part of the hollow anchor an arrangement is made for a cylindrical capsule tightly adjacent to the rod walls and the length of which is equal to length of the cuts. The capsule is made from an easily destructible material and filled with a composition expanded during hardening. The capsule is fixed in its lower part with a metal disc made from a material with a linear expansion coefficient that is larger than that of the anchor material. The disc is connected by means of a stiff rod to a threaded plug that is connected to the outer thread of the anchor rod by means of the inner thread.

EFFECT: improving reliability of anchorage of frozen rocks and avoiding dependence of carrying capacity of an anchor support on temperature conditions of a mine working.

5 dwg