RU1776811C - Method for installing thrust anchor - Google Patents

Abstract

The invention relates to the fastening of mine workings. The goal is to ensure that the anchor is pre-fixed during installation. For this, accommodate. On the wedge cone head (KG) 3 of the anchor rod 2 wire spiral (PS) 4. Insert the anchor into the drilled hole (Ш) 1 and press the turns of PS4 of the part Ш 1 by longitudinally moving KG 3 of the anchor rod 2 inside it Moreover, after introducing the anchor into the drilled Ш 1, the turns of PS 4 on its KG 3 are compressed by means of an installation pipe 5. The diameter of the PS 4 in the compressed state is 5-10 mm larger than the diameter of Ш 1. The longitudinal movement of KG 3 inside the PS 4 is carried out by screwing in it the deep end of the rod 2. In this case, the upper end of the last, abutment Pushing into the bottom of W 1. moves KG 3 deep into the turns of PS 4 and KG 3 is secured to W 1. Then, a base plate is put on the lower end of the rod 2 and the nut is screwed. 2 ill. //////14// /. , p -; - ft, (L C VI VI CN 100

Description

The invention relates to the fastening of underground mines, namely to an anchor support.

A known method of installing the anchor, including placing a coil spring at the end of the rod having a thread the size of the spring, introducing the rod with the spring into the hole and securing the deep end of the rod by screwing it into the spring 1.

The disadvantage of this method is the difficult entry for installing the anchor rod and the low reliability of its fastening, since under the production conditions it is difficult to provide the required ratio of the diameters of the rod, spring and hole.

The closest in technical essence and the achieved effect is a method of installing a tension bolt, including placing on the fixed end of the bolt in the hollows in the form of truncated cones of spring coils of wire, inserting the bolt into the hole and securing it by pressing spring coils of wire into the walls of the bore with cones depressions by longitudinal movement of the bolt relative to the hole 2.

A disadvantage of the known method is the limited scope of its application - only for fastening anchor bolts of small length due to the difficulty of inserting an anchor bolt into the borehole having a diameter equal to or slightly smaller than the diameter of the borehole. With a slight increase in the gap between the walls of the hole and the bolt, the reliability of its fastening is sharply reduced.

The aim of the invention is to increase the reliability of fastening and facilitate the entry of the anchor rod into the hole.

The goal is achieved in that in the method of installing the expansion anchor, including placing on the proppant conical head the anchor rod of the wire spiral, introducing the anchor into the drilled hole and pressing the turns of the wire spiral into the walls of the hole by longitudinally moving inside it the proppant cone head, a wire spiral, the diameter of which 5-10 mm larger than the diameter of the borehole, they are introduced in an extended state and, using the installation pipe, compress it to eliminate gaps between the walls of the borehole, wire with a spiral and propping head and, thus, the anchor is pre-fixed in the hole, longitudinal movement of the head inside the wire spiral is carried out

by screwing the deep end of the rod into it.

Known technical solutions containing features similar to those distinguishing the claimed solution from the prototype were not found.

In FIG. 1 shows an anchor previously fixed in a hole; in FIG. 2 - anchor installed in the hole, general view.

It contains a hole - 1; barbell - 2; conical proppant head - 3; wire spiral - 4; installation pipe - 5; supporting tile - 6; nut - 7.

To install a spacer anchor in the rock mass, drill holes. A conical proppant head 3 is screwed onto the upper end of the rod 2 so that the threaded end of the rod 2 is inside the head 3. Through the free end

rods 2 put on a conical head 3 a wire spiral A in an extended state so that its diameter is less than the diameter of the hole. The anchor assembled in this way using the installation pipe 5 is inserted into the hole 1 until it stops in the bottom hole and the wire spiral 4 is compressed so that its coils increase in diameter and wedge between the walls of the hole 1 and the cone head 3. After removing the installation pipe 5, the rod 2 screw into the spacer head 3. The upper end of the rod 2, resting on the bottom of the hole 1, moves the spacer head 3 deep into the turns of wire 4, push them into the walls of the hole and

the head 3 is fixed by itself. The base plate 6 is put on the lower end of the rod 2 and the installation of the anchor is finally completed by tightening the nut 7.

The installation method is notable for its simplicity, low labor intensity and reliability. The design of the anchor for implementing the method is also notable for its ease of manufacture; its cost is 1.8-2.2 times lower than wedge slit.

Claims (1)

The claims A method for installing an expansion anchor, including placing a wire spiral on the wedge head of the spiral rod, introducing the anchor into the drilled hole and pressing the spiral turns into the walls of the hole by longitudinally moving the anchor head inside it rods, characterized in that, in order to ensure preliminary anchoring of the anchor during installation, after inserting the anchor into the drilled hole, the coils of wire are compressed on its head through the installation pipe, while in a compressed state, the diameter of the wire spiral is 5-10 mm larger than the diameter of the hole, and the longitudinal movement of the head inside the spiral is carried out by screwing into it the deep end of the rod.  ////////////. FIG. 2