RU2262599C2 - Method for steel-and-polymeric anchor installation - Google Patents

Abstract

FIELD: mining industry, particularly for mine tunnel anchoring with steel-and-polymeric anchors.

SUBSTANCE: method involves drilling boreholes; inserting at least one ampoule into the borehole; driving assembled anchor into the borehole, wherein anchor includes rod, fastening nut, support ring, support and spherical washers; rotating anchor up to ampoule breaking; mixing chemical components: tightening the nut after polymerization finishing; turning fastening nut against stop by drilling rig torque applied through fitting; continuing rod rotation so that rod passes beyond the fastening nut screwed on threaded rod tail of the anchor and fixed against damage by ring installed on end of threaded rod tail. Borehole is drilled and anchor is driven with the use of the same mechanism, namely with left-handed telescopic rock drill.

EFFECT: reduced costs for anchor production and installation.

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Description

The invention relates to the mining industry, in particular to the fastening of mine workings with steel-polymer anchors.

A known method of installing steel-polymer anchors [1], including drilling holes, introducing one or more ampoules into the hole, introducing the anchor rod with its simultaneous rotation using a special rotator, through a nozzle screwed onto the threaded shank of the anchor rod.

The disadvantage of this method is the need to use a mechanism (a rotator made on the basis of a pneumatic drill and an air feeder), the complexity of screwing the nozzle onto the threaded end of the anchor, possibly damaged during transportation, the difficulty of screwing the nozzle after the end of the installation of the anchor (the thread is “bitten”).

There is a method of installing polymer anchors [2], which we adopted as a prototype, including drilling holes, introducing one or more ampoules into a hole, introducing an anchor rod with its simultaneous rotation with a pneumatic drill equipped with a special nozzle for the anchor body having a square or other shape shank, as a result of which the ampoules are destroyed, the chemical components are mixed and polymerized.

The disadvantage of the prototype is the use for the operation of rotating the anchor rod of an additional mechanism - a rotator (pneumatic drill), as well as the operation of performing on the body of the anchor a shank of a square or other shape, requiring machining or upsetting of the shank by a blacksmith method, which leads to annealing of the metal and, as a result, to reduce the bearing capacity of the anchor (metal after heat treatment weakens), higher labor costs for the implementation of the shank. All this negatively affects the labor productivity of the fastener and leads to an increase in the cost of the manufacturing process of the anchor rod and the installation process of the anchor.

The present invention solves the problem of reducing the cost of manufacturing and installing anchors.

The invention consists in the following.

A method of installing polymer anchors, including drilling holes, introducing one or more ampoules into a hole, introducing an anchor assembly consisting of a rod, a fixing nut, an abutment ring, a support and a spherical washer. At the same time, the torque of the drill through the nozzle makes the fastening nut screw fully, continuing to rotate the anchor rod by the fastening nut screwed onto the threaded shank of the anchor rod and fixed from folding by the stop ring installed on the end of the threaded shank of the anchor rod, as a result of which the ampoules are destroyed, chemical components are mixed and polymerized. After the polymer resin has hardened, the fixing nut is tightened with a wrench.

Unlike the prototype, the rotation of the anchor is carried out by the fastening nut screwed on the threaded shank of the anchor rod and fixed from folding by the stop ring mounted on the end of the threaded shank of the anchor rod, and in the method of installing the anchor, one mechanism is used - a drilling machine (telescopic perforator " left ”rotation), used both for drilling a hole, and for installing an anchor.

Comparison of the proposed solutions with the prototype and similar solutions known from the existing level of technology, gives reason to argue that it meets the criteria of "Novelty" and "Inventive step".

The invention is illustrated in the drawing, which shows an anchor consisting of a rod 1, a fixing nut 2, an abutment ring 3, a supporting washer 4, a spherical washer 5, an ampoule 6.

Anchor is installed as follows.

According to the passport of fastening the mine workings, drills for drilling anchors are drilled by a percussion-rotary drilling machine (perforator). Ampoules are introduced into the hole 6. An anchor assembly with parts 1, 2, 3, 4, 5 is introduced into the hole. Drill machine 8 with nozzle 7 is added to the anchor, and the fastening nut is screwed through the nozzle 7 to the stop ring 3 until it stops. and then, for the fixing nut 2, rotate the rod 1 until the polymer resin is fully mixed. After the polymer resin has hardened, the fastening nut 2 is tightened with a wrench.

From the foregoing, it follows that the present invention allows to reduce the cost of both the manufacture of the anchor and its installation.

Literature.

1. Patent RU No. 2138645 dated 09/27/1999, application No. 95120806/03 dated 12/13/1995, “Method for fixing polymer rod anchors”.

2. Instructions for the use of steel-polymer rod support. Leningrad: LGI, 1980, p. 61.

Claims (1)

A method of installing steel-polymer anchors, including drilling holes, introducing one or more ampoules into a hole, introducing an anchor assembly consisting of a rod, a fixing nut, an abutment ring, a support and a spherical washer, rotating the anchor until the ampoules break, mixing the chemical components, tightening the nut after polymerization, characterized in that the fastening nut is screwed through the nozzle with a torque through the nozzle until it stops, the anchor rod is continued to be rotated by the fixing nut screwed onto the threaded shank of the anch rod pa and the fixed ring of the rolling-abutment mounted on the end of the threaded shank of the anchor rod, wherein the drilling hole and an anchor installation produce one mechanism, e.g. Telescopic perforator "left" rotation.