CN211258669U - Anchor rod with resistance-increasing large-deformation yielding function - Google Patents
Anchor rod with resistance-increasing large-deformation yielding function Download PDFInfo
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- CN211258669U CN211258669U CN201922061617.5U CN201922061617U CN211258669U CN 211258669 U CN211258669 U CN 211258669U CN 201922061617 U CN201922061617 U CN 201922061617U CN 211258669 U CN211258669 U CN 211258669U
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- yielding
- hollow
- sleeve
- resistance
- anchor rod
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Abstract
The utility model discloses an anchor rod with resistance-increasing large-deformation yielding function, which mainly comprises a hollow yielding sleeve, a cylindrical block body, a hemispherical bulge, a hollow spiral anchoring head, a rod body, a tray and a high-strength nut; the hollow yielding sleeve is uniformly provided with four inverted triangular hollow parts around the barrel, the side wall of each hollow part is provided with a hemispherical bulge, and the upper end of the sleeve is provided with a coarse thread and is connected with the tray and the high-strength nut; the four steel cylinders are uniformly connected to the top end of the rod body through welding; the rod body is pressed into the hollow yielding sleeve through interference connection, and the lower end of the rod body is connected with the hollow spiral anchoring head; hook-shaped barb sheets are distributed on the surface of the hollow spiral anchoring head; the tray and the high-strength nut can apply pre-tightening force to the anchor rod. The utility model adopts the thought of resistance increasing and pressure yielding, simple structure and convenient construction.
Description
Technical Field
The utility model relates to an anchor rod device that uses in the coal mine tunnel support field especially relates to an anchor rod with resistance-increasing large deformation lets pressure function.
Background
As the coal mine in China begins to enter deep mining, the geological conditions of the coal mine tunnel are more and more complex, and the surrounding rock is easy to have the characteristic of large deformation under the influence of deep high ground stress. The roadway in China is supported by a rigid structure, a general anchor rod body structure does not have the function of large deformation yielding, and is difficult to support larger deformation when surrounding rock large deformation occurs, so that the anchor rod body structure is broken by pulling, the structure fails, safety accidents such as roof collapse and floor heave occur in the roadway of a coal mine, and the normal production of the coal mine is influenced.
At present, the most studied problem of surrounding rock support in a high ground stress environment is the problem of increasing anchoring force and improving pretightening force, but the large deformation of the surrounding rock is still difficult to control when the surrounding rock is subjected to large deformation, so that the anchor rod is broken, therefore, the support problem of a large-deformation roadway in China begins to turn to the anchor rod and the anchor cable with deformation functions, but the problems of complex construction, high manufacturing cost and poor stability exist, and the application in engineering practice is limited.
For example, the invention with the application number of 201811451164.0 discloses a novel large-deformation component, which comprises an outer sleeve, wherein a fastener is arranged on the outer sleeve, the fastener compresses the inner sleeve in the outer sleeve, the inner wall of the inner sleeve is provided with an inclination, a sliding body attached to the inner wall is arranged in the inner sleeve, and the sliding body is connected with a steel strand, so that two effective yielding processes can be brought, but the yielding mechanism is complex, the number of parts is large, and the engineering practicability is low.
The invention with the application number of 201811122152.3 discloses a friction-shear combined quasi-constant-resistance large-deformation anchor cable, which mainly comprises a sleeve rod and an anchor rod, wherein yielding is realized mainly through a circular-ring-shaped shear core on the inner wall of the sleeve rod and a circular-truncated-cone-shaped yielding anchor head on the anchor rod, so that the large deformation of surrounding rock is adapted.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides an anchor rod with resistance-increasing large-deformation yielding function, which has simple structure, convenient operation and easily understood principle.
The utility model relates to an stock with resistance-increasing large deformation lets presses function, its structure is: the fixture comprises a hollowed yielding sleeve, a cylindrical block body, a hemispherical bulge, a hollow spiral anchoring head, a rod body, a tray and a high-strength nut, and is characterized in that four inverted-triangular hollowed parts are uniformly arranged around the hollowed yielding sleeve and are arranged in a cross shape; the cylindrical stop block body is welded on the periphery of the top of the anchor rod body and is consistent with the hollowed-out part; the hollow spiral anchoring head is connected with the lower end of the rod body, and the surface of the anchoring head is provided with a hook-shaped barb sheet; the tray and the high-strength nut are in threaded connection with the upper part of the hollowed yielding sleeve.
Hemispherical bulges are arranged on the side walls of the four inverted triangular hollowed-out parts at equal intervals to provide yielding resistance; the fretwork let press the sleeve upper end be carved with the thick screw thread that is connected with tray and nut, with adopt the interference to be connected between the body of rod, increase frictional force.
The cylinder keeps off the cylinder that the block body was made for high strength rigidity material, the cylinder surface is tangent with the trilateral of the widest department in the department of falling triangle-shaped fretwork position, lets press the in-process to provide the resistance many times.
The upper end of the rod body is welded with the cylindrical stopper body, and the lower end of the rod body is carved with a fine thread connected with the hollow spiral anchoring head; the hook-shaped barb sheet is arranged on the outer surface of the hollow spiral anchoring head, the inclination angle between the hook-shaped barb sheet and the outer surface of the hollow spiral anchoring head is 30-40 degrees, and the anchoring force is increased.
The utility model relates to a construction method of stock with resistance-increasing large deformation lets pressure function does:
(1) punching at a designated position according to construction requirements;
(2) pressing the rod body into the hollow yielding sleeve through interference connection, wherein the top end of the rod body is flush with the hollow part of the inverted triangle, and welding the four cylindrical baffle bodies at the top end of the rod body respectively and penetrating out of the hollow part;
(3) screwing the hollow spiral anchoring head into the lower end of the rod body through threads;
(4) slowly pushing the resin anchoring agent into the bottom of the hole, placing the rod body and the hollow yielding sleeve into the hole, starting the stirrer to rotate the sleeve, so that the resin anchoring agent is crushed, and bonding the hollow spiral anchoring head and the surrounding rock into a whole;
(5) after the anchoring agent is completely cured, the tray and the high-strength nut are sequentially installed, the high-strength nut is screwed down to apply partial pre-tightening force to the anchor rod, and the applied pre-tightening force cannot exceed the shearing strength of the cylindrical block body.
The utility model relates to an stock with increase and hinder big deformation and let and press the function lets press telescopic resistance that increases through the fretwork and warp the stability of guaranteeing tunnel country rock, and its advantage is:
(1) the pre-tightening force applied to the surrounding rock in the early stage enables the rod body and the surrounding rock to form a whole, so that the supporting capability of the anchor rod is improved;
(2) the structure is simple and convenient, the dead weight is light, and the transportation and the installation are convenient;
(3) the pin bolt action between the hollow yielding sleeve and the stop block provides a yielding distance for resisting large deformation of the surrounding rock, so that the anchor rod is not easy to break, damage and lose efficacy;
(4) the interference connection between the hollow yielding sleeve and the rod body increases a part of friction resistance;
(5) the hollowed-out yielding sleeve is provided with a raised semicircle on the side edge of the inverted triangular hollowed-out part, so that the resistance of secondary yielding can be provided for the anchor rod.
Drawings
Fig. 1 is the utility model relates to an anchor rod overall section view with resistance-increasing large deformation yielding function.
Fig. 2 is the utility model discloses a fretwork lets presses sleeve section view.
Fig. 3 is a sectional view taken along line a-a of the present invention.
Illustration of the drawings: 1-high-strength nut; 2-a tray; 3-a cylindrical block body; 4-hemispherical protrusions; 5-hollowing out the yielding sleeve; 51-hollowing out the side wall of the yielding sleeve; 6-hollow spiral anchoring head; 7-a rod body; 8-hook-shaped barb sheet.
Detailed Description
A rock bolt with resistance-increasing large-deformation yielding function as shown in fig. 1-3, which is configured as follows: the high-strength anchor rod is characterized in that four inverted triangular hollows are uniformly arranged around the hollow yielding sleeve 5 and are arranged in a cross shape; the cylindrical block bodies 3 are welded on the periphery of the top of the anchor rod body 7 and are consistent with the hollowed-out parts; the hollow spiral anchoring head 6 is connected with the lower end of the rod body 7, and the surface of the anchoring head is provided with a hook-shaped barb sheet 8; the tray 2 and the high-strength nut 1 are in threaded connection with the upper part of the hollowed yielding sleeve 5.
The hemispherical bulges 4 are equidistantly arranged on the side wall 51 of the hollow yielding sleeve to provide yielding resistance; the fretwork let press sleeve 5 upper end be carved with the thick screw thread that is connected with tray 2 and high strength nut 1, adopt interference connection between the body of rod 7, increase frictional force.
The cylinder keeps off block body 3 for the cylinder of the rigid material preparation that excels in, the cylinder surface is tangent with the trilateral of the widest department in the department of falling triangle-shaped fretwork position, lets the pressure in-process provide the resistance many times.
The upper end of the rod body 7 is welded with the cylindrical block body 3, and the lower end of the rod body is carved with a fine thread connected with the hollow spiral anchoring head 6; the hook-shaped barb sheet 8 is arranged on the outer surface of the hollow spiral anchoring head 6, the inclination angle between the hook-shaped barb sheet and the outer surface of the hollow spiral anchoring head 6 is 30-40 degrees, and the anchoring force is increased.
The utility model relates to a construction method of stock with resistance-increasing large deformation lets pressure function does:
(1) punching at a designated position according to construction requirements;
(2) pressing the rod body 7 into the hollow yielding sleeve 5 through interference connection, enabling the top end of the rod body 7 to be flush with the hollow part of the inverted triangle, and respectively welding the four cylindrical baffle bodies 3 at the top end of the rod body 7 and penetrating out of the hollow part;
(3) screwing the hollow spiral anchoring head 6 into the lower end of the rod body 7 through threads;
(4) slowly pushing the resin anchoring agent into the bottom of the hole, placing the rod body 7 and the hollow yielding sleeve 5 into the hole, starting the stirrer to rotate the sleeve, crushing the resin anchoring agent, and bonding the hollow spiral anchoring head 6 and the surrounding rock into a whole;
(5) after the anchoring agent is completely cured, the tray 2 and the high-strength nut 1 are sequentially installed, the high-strength nut 1 is screwed down to apply partial pretightening force to the anchor rod, and the applied pretightening force cannot exceed the shearing strength of the cylindrical blocking block body 3.
Claims (4)
1. An anchor rod with resistance-increasing large-deformation yielding functions comprises a hollowed yielding sleeve, a cylindrical blocking body, hemispherical protrusions, a hollow spiral anchoring head, a rod body, a tray and a high-strength nut, and is characterized in that four inverted-triangular hollows are uniformly arranged around a barrel body of the hollowed yielding sleeve and are arranged in a cross shape; the cylindrical stop block body is welded on the periphery of the top of the anchor rod body and is consistent with the hollowed-out part; the hollow spiral anchoring head is connected with the lower end of the rod body, and the surface of the anchoring head is provided with a hook-shaped barb sheet; the tray and the high-strength nut are in threaded connection with the upper part of the hollowed yielding sleeve.
2. The anchor rod with the resistance-increasing large-deformation yielding function according to claim 1, wherein hemispherical protrusions are arranged on the side walls of the four inverted triangular hollow parts at equal intervals, and coarse threads connected with the tray and the nut are carved at the upper end of the hollow yielding sleeve; the fretwork let press the sleeve and pass through interference connection with the body of rod in the sleeve.
3. The anchor rod with the resistance-increasing large-deformation yielding function according to claim 1, wherein the cylindrical block body is a cylinder made of a high-strength rigid material, and the outer surface of the cylinder is tangent to three edges of the widest part of the hollowed-out part.
4. The anchor rod with the functions of increasing resistance, large deformation and yielding according to claim 1, wherein the lower end of the rod body is carved with fine threads connected with a hollow spiral anchoring head; the hook-shaped barb sheet and the surface of the hollow spiral anchoring head form an angle of 30-40 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922061617.5U CN211258669U (en) | 2019-11-26 | 2019-11-26 | Anchor rod with resistance-increasing large-deformation yielding function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922061617.5U CN211258669U (en) | 2019-11-26 | 2019-11-26 | Anchor rod with resistance-increasing large-deformation yielding function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211258669U true CN211258669U (en) | 2020-08-14 |
Family
ID=71955402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922061617.5U Expired - Fee Related CN211258669U (en) | 2019-11-26 | 2019-11-26 | Anchor rod with resistance-increasing large-deformation yielding function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211258669U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847075A (en) * | 2021-10-12 | 2021-12-28 | 河海大学 | Self-tapping yielding anchor rod for controlling large deformation of soft rock |
-
2019
- 2019-11-26 CN CN201922061617.5U patent/CN211258669U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847075A (en) * | 2021-10-12 | 2021-12-28 | 河海大学 | Self-tapping yielding anchor rod for controlling large deformation of soft rock |
| CN113847075B (en) * | 2021-10-12 | 2023-11-10 | 河海大学 | Self-tapping type abdicating anchor rod for controlling large deformation of soft rock |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200814 Termination date: 20211126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |