RU197298U1 - Anchor fasteners - Google Patents

Anchor fasteners Download PDF

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Publication number
RU197298U1
RU197298U1 RU2020107858U RU2020107858U RU197298U1 RU 197298 U1 RU197298 U1 RU 197298U1 RU 2020107858 U RU2020107858 U RU 2020107858U RU 2020107858 U RU2020107858 U RU 2020107858U RU 197298 U1 RU197298 U1 RU 197298U1
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RU
Russia
Prior art keywords
rods
anchor
points
contact
longitudinal
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RU2020107858U
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Russian (ru)
Inventor
Борис Александрович Утробин
Сергей Иванович Сойкин
Александр Сергеевич Сойкин
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Александр Сергеевич Сойкин
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Priority to RU2020107858U priority Critical patent/RU197298U1/en
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Publication of RU197298U1 publication Critical patent/RU197298U1/en

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • E21D11/15Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection

Abstract

The utility model relates to the mining industry, in particular to anchor supports, and can be used for fastening the mine workings of mines and mines. The technical result, which the proposed utility model is aimed at, is to increase the reliability of the anchor support. The technical result is achieved by the fact that the anchor the lining consists of a hollow metal rod with a longitudinal slot along the entire length with stiffeners formed by the faces of the longitudinal slot bent C-shaped inside the hollow rod, which form (hereinafter, the ω-shaped) profile of the anchor with a tapered end on one side and a welded support ring on the other hand, complete with a support damping element and a mesh made of longitudinal and transverse reinforcing bars welded at the contact points, characterized in that that the interlacing of the rods is made in such a way that the two central longitudinal rods at the points of contact are located under the two central transverse rods, and at the points of contact with the extreme rods above them, and the extreme flax rods at points of contact with the central transverse rods are located above them, and at the points of contact with the extreme transverse rods - under them, the ends of the longitudinal rods are bent in the direction of the cone of the anchor.

Description

The technical field to which the utility model relates.

The utility model relates to the mining industry, in particular to anchor supports, and can be used for fastening mining workings of mines and mines.

State of the art

Known Section anchor support (RU 193246, application No.2019115953, publication date 10/21/2019, bull. No. 30, IPC class E21D 21/00, E21D 11/15), the closest in technical essence to the proposed utility model. This technical solution is taken as a prototype.

A well-known section of anchor support, consisting of a hollow metal tube with a conical end on one side and a support ring welded to the tube to hold the support element on the other hand, while the hollow tube is made with a slit slot along the entire length, forming faces that are bent to form ω -shaped profile complete with a damper support element and a mesh installed on top of the support element made of longitudinal and transverse metal rods intertwined with each other at adjacent points.

The disadvantage of the technical solution adopted for the prototype is the inefficient operation of the grid after installing the anchor lining due to insufficient clamping to the massif along its edges. This is due to the fact that during the installation of a tubular anchor lining with frictional fastening, the impact of a perforator falls on the tail of the anchor inserted into the central cell. Therefore, the greatest shock load falls on the rods of the central cell, as a result of which their deformation occurs. Due to the interweaving of the transverse and longitudinal rods of the mesh at adjacent points in the final phase of the installation of the anchor support, the bending of the extreme rods along the edges in the direction from the rock mass occurs. Due to this effect, the extreme rods remain not pressed against the rock mass, as a result of which local rock outfalls can form

Utility Model Disclosure

The technical result, which is provided by the proposed utility model, is to increase the reliability of the anchor support.

The technical result is achieved by the fact that the anchor support consists of a hollow metal rod with a longitudinal slot along the entire length with stiffeners formed C-shaped bent inwardly into the hollow rod by the faces of the longitudinal slot that form

Figure 00000001
(hereinafter, ω-shaped) profile of the anchor with a tapered end on one side and a welded support ring on the other hand, complete with a supporting damping element and a mesh made of longitudinal and transverse reinforcing bars welded at the contact points, characterized in that the weave rods made in such a way that two central longitudinal rods at the points of contact are located under two central transverse rods, and at the points of contact with the extreme rods above them, and the extreme longitudinal rods in the points of contact with the central transverse rods are above them, and at the points of contact with the extreme transverse rods are below them, while the ends of the longitudinal rods are curved towards the anchor cone.

This technical solution allows you to provide the most tight fit anchor lining to the rock mass, preventing its stratification.

Description of drawings

In FIG. 1 shows a side view of the anchor support before it is installed in the hole; in FIG. 2 - shows a top view of the anchor support before it is installed in the hole; in FIG. 3 - shows a side view of the anchor support after installing it in a rock mass.

The implementation of the invention

Anchor support consists of a hollow metal rod 1 with a longitudinal slot 2 along the entire length with stiffening ribs 3 formed by the faces of the longitudinal slot, which are curved C-shaped inside the hollow rod, which form

Figure 00000001
(hereinafter referred to as an ω-shaped) profile of the anchor with a tapered end 4 on one side and a welded support ring 5 on the other hand, complete with a supporting damping element 6 and a mesh 7 made of longitudinal and transverse reinforcing bars welded at the contact points, characterized Thus, the interlacing of the rods is performed in such a way that the two central longitudinal rods 8 and 9 at the contact points 10, 11, 12 and 13 are located under the two central transverse rods 14 and 15, at the contact points 16, 17, 18 and 19 with the extreme transverse rods 20 and 21 above them, and the extreme longitudinal rods 22 and 23 at the points of contact 24, 25, 26 and 27 with the central transverse rods 14 and 15 are above them, and at the points of contact 28, 29, 30 and 31 with the extreme transverse rods 20 and 21 -beneath them, while the ends of the longitudinal rods 8, 9, 22 and 23 are bent in the direction of the anchor cone.

Installation of anchor support is as follows.

After drilling the boreholes, a rod with an adapter (punch) is installed instead of the drill rod on the boom of the feeder of a self-propelled drilling rig or on a manual punch. Next, the anchor 1 with the tail part is put on the punch and installed in the guide (rest). A support damping element 6 and a mesh are installed on the anchor 7. The head end of the cone-shaped anchor 4 is inserted into the hole 32, smaller in diameter than the diameter of the anchor 1 and by the impact of the perforator on the tail part, the anchor 1 is sent until it is pressed by the damping support element 6 of the mesh 7 to the rock mass 33.

The tubular anchor 1, which is part of the anchor lining, is made of a metal hollow core with a longitudinal slot 2, while one end is made in the form of a truncated cone 4, and a support ring of circular cross section 5 is welded to the other end to hold the supporting element 6 of the anchor lining. The longitudinal slot 2 is made with stiffeners 3, formed by C-shaped faces bent inside the rod, forming in the cross section an ω-shaped profile of the anchor, while the stiffening ribs 3 are made from the cone 4 to the opposite end of the anchor, including its part behind the support ring 5 This design of the anchor allows to achieve high rates of bearing capacity of the anchor lining, while ensuring sufficient strength of the anchor rod to bend along the entire length, which allows you to level the errors of the operator of a self-propelled drill second set or a manual punch, and minimize the amount of bent of anchors, for example, when misalignment with the anchor holes in the initial stage of installation of roof bolting. The presence of stiffeners 3 behind the support ring 5 allows you to install anchor support with a rod of a co-profile without possible deformations that occur when it is driven into a hole 32 of a smaller diameter than the diameter of the anchor 1 when using a circular cylindrical profile in the tail of the anchor behind the support ring. As a result of pilot tests at Russian mines, it was found that the design of the anchor 1 ω-shaped profile with a length of more than 2000 mm when driving into a hole 32 is smaller by 2-5 mm in diameter than the diameter of the anchor creates excessive resistance to movement of the anchor in the hole, sufficient for bending and detaching the tail of the anchor, made in the form of an open circular cylinder in places of its transition to the ω-shaped profile. This leads to the impossibility of pressing the supporting element 6 of the anchor support of the mesh 7 to the rock mass 33 and, accordingly, to its inferior work. When testing the design of the anchor according to the proposed technical solution, this effect was not observed.

The task of the support element 6 in the proposed design is to provide a tight hold of the mesh 7 to the rock mass 33. The support element of the anchor support 6 can be made in the form of a metal support washer with a spherical bulge in the center or stiffeners along the edges, as well as various options pickups.

The metal mesh 7 is made of longitudinal 8, 9, 22 and 23 and transverse 14, 15, 20 and 21 metal rods, preferably reinforcing, of a periodic profile welded together at the contact points. The interlacing is performed in such a way that two central longitudinal rods 8 and 9 at the contact points 10, 11, 12 and 13 are located under the two central transverse rods 14 and 15, and at the contact points 16, 17, 18 and 19 with the extreme transverse rods 20 and 21 above them, and the extreme longitudinal rods 22 and 23 at the points of contact 24, 25, 26 and 27 with the central transverse rods 14 and 15 are above them, and at the points of contact 28, 29, 30 and 31 with the extreme transverse rods 22 and 23 - under them, while the ends of the longitudinal rods 8, 9, 22 and 23 are bent in the direction of the cone of the anchor. This design of the mesh allows for the installation of anchor lining to ensure its closest fit to the rock mass, excluding its delamination during operation of the anchor lining. This is due to the following circumstances. When installing a tubular anchor support with friction fastening, which is proposed as a technical solution, standard drills of self-propelled drilling rigs, special anchor installers or manual perforators are used. During the installation of the anchor support in the initial stage of pressing the mesh 7 to the rock mass 33, the extreme longitudinal rods 22 and 23 at the intersection with the central transverse rods 14 and 15 are in contact with the rock mass 33, creating a support for further deformation of the grid, in order to ensure it maximum clamp. With further impact of the puncher on the tail of the anchor, the mesh deforms in the central part, namely at the intersection of two central longitudinal 8 and 9 and two central transverse 14 and 15 rods, since this part of the mesh has the greatest load from the impact of the punch. As a result of such a deformation, the central part of the grid 7 will be pressed as close as possible to the rock mass 33, forming one plane with the extreme longitudinal rods 22 and 23, which will make it possible to evenly distribute the load from the fixed rock mass along the grid. The ends of the transverse 14, 15, 20 and 21 and longitudinal 8, 9, 22 and 23 rods bent towards the anchor cone compensate for the deformation of their extended part when installing the lining. The use of reinforcing bars with a corrugated surface in the mesh design allows for strong adhesion to the rock mass.

The grid is used to overlap the inter-anchor space in order to exclude rock mass outfall from the roof and sides of the mine. In view of the most common fastening steps at Russian mines and the optimal metal consumption of the anchor lining, it is advisable to produce a mesh with a size from 600 × 600 mm to 1300 × 1300 mm with a diameter of rods from 8 to 14 mm. If necessary, nets of a gauge of less than 500 × 500 mm, as a rule, anchor support is not safe to use, in such cases a support type is used, for example, a frame. An increase in the gauge grid over 1300 × 1300 mm is also not safe, since there is a possibility of rock outfall. Due to the large mass of rock being fixed, the use of rebar rods of less than 8 mm is not safe, because low tensile strength of such rods will not provide the proper strength of the structure of the anchor lining, and over 14 mm - leads to an inappropriate increase in the metal consumption of the anchor lining. All the features of the claimed utility model in the aggregate “hollow metal rod with a longitudinal slot”, “with stiffeners formed by the edges of the longitudinal slot bent C-shaped inside the hollow rod”, “ω-shaped anchor profile”, “welded support ring”, “damping support element "," a grid made of longitudinal and transverse reinforcing bars welded at the contact points, characterized in that the interlacing of the bars is made in such a way that two central longitudinal bars at the contact points are located under two central transverse rods, and at the points of contact with the extreme transverse rods above them, and the extreme longitudinal rods at the points of contact with the central transverse rods are above them, and at the points of contact with the extreme transverse rods under them "" the ends of the longitudinal rods are bent at direction of the anchor cone ”contribute to increasing the reliability of the operation of the anchor support, namely, the proposed design of the anchor support is securely fixed when it is installed in a hole in a rock mass, and provides the necessary clamp m grid array of rocks, ensuring the safety of mining operations.

The technical result claimed when applying for a patent for a utility model is achieved by the combination of all the essential features specified in the formula. The significance of all the features of a utility model is confirmed by a causal relationship between the features of the utility model formula and the technical result.

Anchor support, offered as a utility model, is a device, all elements of which are interconnected and perform a single function.

The utility model meets the conditions of patentability “novelty” and “industrial applicability”, which is confirmed during pilot trials.

Claims (1)

  1. Anchor support, consisting of a hollow metal rod with a longitudinal slot along the entire length with stiffeners formed by the faces of the longitudinal slot formed bent C-shaped inside the hollow rod, which form
    Figure 00000002
    profile of the anchor with a tapered end on one side and a welded support ring on the other hand, complete with a support element and a mesh made of longitudinal and transverse reinforcing bars welded at the contact points, characterized in that the interlacing of the rods is made in such a way that two central longitudinal the rods at the points of contact are located under two central transverse rods, and at the points of contact with the extreme transverse rods above them, and the extreme longitudinal rods at the points of contact with the central with their transverse rods are above them, and at the points of contact with the extreme transverse rods - under them, while the ends of the longitudinal rods are curved towards the anchor cone.
RU2020107858U 2020-02-20 2020-02-20 Anchor fasteners RU197298U1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU124735U1 (en) * 2012-06-18 2013-02-10 Антон Анатольевич Зубков Security anchor section
CN102996149A (en) * 2012-11-21 2013-03-27 山东科技大学 Support method for bolt-grouting composite crushing dynamic-pressure roadway soft rock roof by high-pre-stressed anchor cable
RU152727U1 (en) * 2014-11-11 2015-06-10 Общество с ограниченной ответственностью "Промперсонал" Mesh for self-fixing anchor fasteners (sza)
RU152941U1 (en) * 2014-11-11 2015-06-27 Общество с ограниченной ответственностью "Промперсонал" Mesh for self-fixing anchor fasteners (sza)
RU161817U1 (en) * 2015-12-01 2016-05-10 Антон Анатольевич Зубков Reinforced anchor fasteners
RU2698836C1 (en) * 2018-07-02 2019-08-30 Акционерная компания "АЛРОСА" (публичное акционерное общество) Anchor support section
RU193246U1 (en) * 2018-07-09 2019-10-21 Александр Сергеевич Сойкин Security anchor section

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU124735U1 (en) * 2012-06-18 2013-02-10 Антон Анатольевич Зубков Security anchor section
CN102996149A (en) * 2012-11-21 2013-03-27 山东科技大学 Support method for bolt-grouting composite crushing dynamic-pressure roadway soft rock roof by high-pre-stressed anchor cable
RU152727U1 (en) * 2014-11-11 2015-06-10 Общество с ограниченной ответственностью "Промперсонал" Mesh for self-fixing anchor fasteners (sza)
RU152941U1 (en) * 2014-11-11 2015-06-27 Общество с ограниченной ответственностью "Промперсонал" Mesh for self-fixing anchor fasteners (sza)
RU161817U1 (en) * 2015-12-01 2016-05-10 Антон Анатольевич Зубков Reinforced anchor fasteners
RU2698836C1 (en) * 2018-07-02 2019-08-30 Акционерная компания "АЛРОСА" (публичное акционерное общество) Anchor support section
RU193246U1 (en) * 2018-07-09 2019-10-21 Александр Сергеевич Сойкин Security anchor section

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