SU1601383A1 - Method of setting roof bolt - Google Patents

Abstract

The invention relates to the coal and mining industries and is intended for the fastening of underground mines. The goal is to increase the carrying capacity of the anchor and reduce losses in the shearing mixture. To do this, perforation of the ampoules 6, filled with dry phosphogypsum is used. The mixture is then moistened by immersing the ampoules in water and keeping there for 1.5-2.0 minutes. The insertion of the ampoules 6 into the borehole 4 is carried out sequentially and compacts each of them. Then an anchor rod 1 with a pointed end 2 and a sealing washer 3 located on it is hammered into the hole 4. A centering sleeve 7 is put on the rod 1, which together with the sealing washer 3 ensures the location of the rod 1 strictly along the axis of the hole 4. When the rod 1 is driven the shell of the ampoules 6 is broken, compaction occurs in the grub mixture by means of a washer 3 and the anchor is fixed in the hole 4. 3 sludge.

Description

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The invention relates to the coal and mining industries and can be used to mount underground mines, the purpose of the invention is to increase the depth of the anchor and reduce losses in the mixture.

Fig, 1 shows the anchor ster-: zhen before installing it in the hole; in fig. 2-anchor rod at the initial moment of immersion of the anchor; rod in the borehole; in fig. 3 - anchor: rod after installing it and zak-: replenii in phosphogypsum in the gang. i, the anchor consists of an anchor rod i, pointed at the immersed j end 2, on which the washer 3 is previously tightly attached; the anchor rod 1 x 1 is immersed in the hole 4 with blows that are applied to its tail i (shank) 5.

; Before immersion of the anchor rod 1 into the hole 4, ampholes with phosphogypsum-6 are carefully inserted and worn, and the anchor rod 1 is put on; center 1 bushing sleeve 7, which together I c. washer 3 provides the location of the anchor rod 1 strictly along the axis I of the hole 1.

 After immersing the anchor rod i n 1 into the hole 4 in the design position i, first, the direction- is extracted from the hole 4; The sleeve 7, and then the support plate 8 and the nut 9 are put on the tails 5 and the last one is pulled as the strength of the binder is increased.

The method is carried out as follows.

Preparation of ampholes with phosphogypsum begins in the installation area of anchor bolts. The ampoules are removed from the plastic bag and a special device, perforated. The holes are evenly distributed across the ampoule, bringing the perforation closer on two opposite sides along the length of the ampoule. The holes are made through 2jO mm, at distances of the holes approaching, the distance is as follows.

that the ampoule retains the necessary strength when inserted into the hole and is easily broken when it is pushed down by the plunger.

Then, the required number of perforated ampoules is immersed in a container with water and kept in it for 1.5-2.0 minutes, after which amtgules are introduced one by one into the hole, crushed and carefully compacted. Then to anchor rod

Q 5 0

50

,

0 5

0

five

put the washer on the side of the immersed end. At the same time on the rod from the side of the shank put on the sleeve. The anchor rod is inserted with a sharp end into the hole; the guide sleeve is fixed in the hole of the hole and the rod is driven in by a pneumatic perforator equipped with a special sleeve.

When immersed, the anchor rod is centered in two places along its length, which allows it to be hammered strictly along the axis of the hole and to ensure a uniform location of the rod inside the gangway. In this case, the rod is immersed inside the passage through the hole of the washer, and the washer shrinks into the hole, contributing to the increase of its density in the hole.

Rods made from steel of a periodic profile are used as an aneric rod, and the profile of the notches is oriented along the rod at an angle of 10-15 to the longitudinal axis, so that the latter, when the rod is immersed in the hole, do not prevent the anchor from moving in the gantry.

Claims (1)

After the anchor rod is immersed in the design position, the guide sleeve is removed and installed, the Support tile and the tension nut. Claims. The method of installation of the anchor, including the introduction of ampoules into the hole, filled with a dry in a binding mixture - and made of a moisture-proof material, for example, polyethylene, pre-wetting of the dry mixture in ampoules, the introduction of an anchor into a hole; This means that, in order to increase the bearing capacity of the anchor and reduce losses in the underlying mixture, the ampoules are perforated evenly over the surface and brought closer along one side, and the mixture is moistened. in ampoules n It is produced by immersing the ampoules in the water with them in water for 1.5–2.0 minutes. In this case, the ampoules are inserted into the hole sequentially and each of them is sealed, and the stem is inserted into the hole in the hole. , and its immersible end is made pointed and has a sealing washer, while using a mixture based on phosphogypsum as a binder mixture. FIG. 2 g 6 3