CN113323702A - Transmission expansion type anchor rod and installation method thereof - Google Patents
Transmission expansion type anchor rod and installation method thereof Download PDFInfo
- Publication number
- CN113323702A CN113323702A CN202110673257.3A CN202110673257A CN113323702A CN 113323702 A CN113323702 A CN 113323702A CN 202110673257 A CN202110673257 A CN 202110673257A CN 113323702 A CN113323702 A CN 113323702A
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- China
- Prior art keywords
- expansion
- transmission
- metal
- shell
- rod body
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- Pending
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009434 installation Methods 0.000 title abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 75
- 239000011435 rock Substances 0.000 claims abstract description 48
- 230000006835 compression Effects 0.000 claims abstract description 6
- 238000007906 compression Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000011900 installation process Methods 0.000 description 6
- 239000002360 explosive Substances 0.000 description 5
- 239000004570 mortar (masonry) Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0053—Anchoring-bolts in the form of lost drilling rods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a transmission expansion type anchor rod and an installation method thereof, wherein the transmission expansion type anchor rod comprises a rod body, a metal expansion shell sleeved on the rod body and a transmission nut arranged at the first end of the rod body, the second end of the rod body is fixedly connected with the corresponding end part of the metal expansion shell, the rod body consists of a threaded section and a smooth section, the first end of the rod body is the end part of the threaded section, and the second end of the rod body is the end part of the smooth section; the transmission nut is used for compressing the metal expansion shell by rotating the transmission nut when the transmission expansion type anchor rod is installed in a rock hole; the metal expansion shell is used for generating expansion deformation when the compression force exceeds the yield limit of the metal expansion shell so as to extrude the surrounding rock of the rock hole and anchor the surrounding rock. The invention has the advantages of simple structure, low cost, convenient installation, short installation time, guaranteed installation quality and no pollution to the environment.
Description
Technical Field
The invention relates to the technical field of mining, in particular to a transmission expansion type anchor rod and an installation method thereof.
Background
In the process of mining metal ores, the safety problems of the roadway and the stope roof are particularly important. With the increase of the mining difficulty, how to ensure the stability of a roadway and a stope top plate so as to ensure the safety of underground workers is a technical problem in the current mining process.
Currently, anchor rods are mostly fixed in rock holes of roadway and stope roof plates, such as mortar anchor rods, cement cartridge anchor rods, water-swelling anchor rods, resin anchor rods, and the like. However, these bolts have major drawbacks: the mortar of the mortar anchor rod is difficult to keep uniform in the full-length range; the cement explosive roll anchor rod is difficult to cause the cement explosive roll to be full of holes, so that the cement explosive roll anchor rod cannot fully play a role; when the water expansion anchor rod is installed, a set of special hydraulic facilities is needed; the pipe seam type anchor rod needs to be driven by an air drill; the resin anchor rod needs to be stirred by a coal electric drill or a pneumatic stirrer, so that the water expansion type anchor rod, the pipe seam type anchor rod and the resin anchor rod are affected by wind, electricity and mechanical accidents, and the safety can not be ensured.
Disclosure of Invention
Compared with the prior art, the invention has the advantages of simple structure, low cost, convenient installation, short installation time, guaranteed installation quality and no environmental pollution.
In order to solve the problems, the invention provides the following technical scheme:
in a first aspect, the present invention provides a drive expansion bolt comprising: the metal expansion shell is sleeved on the rod body, and the transmission nut is arranged at the first end of the rod body; the transmission nut is used for compressing the metal expansion shell by rotating the transmission nut when the transmission expansion type anchor rod is installed in a rock hole; the metal expansion shell is used for generating expansion deformation when the compression force exceeds the yield limit of the metal expansion shell so as to extrude the surrounding rock of the rock hole and anchor the surrounding rock.
In a second aspect, the present invention provides a method of installing a transmission expansion type anchor provided in the first aspect, the method including:
the transmission expansion type anchor rod is arranged in a rock hole which is drilled in advance on a top plate of a roadway or a stope; the first end of the rod body is arranged outside the rock hole;
and rotating the transmission nut to enable the transmission nut to compress the metal expansion shell until the compressive force applied to the metal expansion shell exceeds the yield limit of the metal expansion shell, so that the metal expansion shell generates expansion deformation to extrude the surrounding rock of the rock hole and anchor the surrounding rock.
Compared with the prior art, the technical scheme of the invention at least has the following technical effects:
in the scheme, the invention provides the transmission expansion type anchor rod and the installation method thereof. In addition, as hydraulic equipment, an air drill, an electric drill or an air operated stirrer and other wind, electric and mechanical equipment are not needed in the installation process, wind, electric and mechanical accidents cannot be caused in the installation process, and the installation quality is guaranteed; and the installation is very convenient, and the installation time is also very short. In addition, mortar, explosive rolls and the like can not be produced in the installation process, and the environment can not be polluted.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a transmission expansion type anchor according to an embodiment of the present invention.
Reference numerals: 11. a threaded section of the rod body; 12. a bloom section of the rod body; 21. a sheathing part of the metal expansion shell; 22. a connecting portion of the metal expansion shell; 3. and a drive nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In a first aspect, the present invention provides a drive expansion bolt, as shown in fig. 1, comprising: the device comprises a rod body, a metal expansion shell sleeved on the rod body and a transmission nut 3 arranged at the first end of the rod body, wherein the second end of the rod body is fixedly connected with the corresponding end part of the metal expansion shell, the rod body consists of a threaded section and a smooth section, the first end of the rod body is the end part of the threaded section, and the second end of the rod body is the end part of the smooth section; the transmission nut 3 is used for compressing the metal expansion shell by rotating the transmission nut 3 when the transmission expansion type anchor rod is installed in a rock hole; the metal expansion shell is used for generating expansion deformation when the compression force exceeds the yield limit of the metal expansion shell so as to extrude the surrounding rock of the rock hole and anchor the surrounding rock.
Wherein the first end of the rod body is a tail end and the second end of the rod body is a tip end, and when the rod body is installed, the tip end enters a rock hole first.
The end part of the metal expansion shell corresponding to the second end of the rod body can be called a second end of the metal expansion shell, the end part of the metal expansion shell corresponding to the first end of the rod body can be called a first end of the metal expansion shell, and the second end of the rod body is fixedly connected with the second end of the metal expansion shell; the first end of the rod body is non-fixedly connected with the first end of the metal expansion shell, and when the metal expansion shell is extruded, the first end of the metal expansion shell can be contracted in the rod body.
Wherein, drive nut sets up the outside at the second end of metal shell expander to in to the metal shell expander carries out the compression.
Understandably, when will when transmission inflation formula stock is packed into the rock bore, through rotatory drive nut, drive nut can be right the metal shell that expands compresses, works as the compressive force that the metal shell that expands received surpasss when the yield limit of the metal shell that expands, the metal shell that expands produces the expansion deformation, and the diameter of the metal shell that expands like this has little grow, can make the metal shell that expands inlay firmly in the rock bore, produces very big frictional force, produces powerful extrusion force to the country rock in rock bore, can be right promptly the country rock in rock bore extrudees to the effect of anchor country rock.
It can be understood that the metal shell will shrink to some extent due to its small and large diameter during the deformation process.
Where the yield limit may also be referred to as the flow limit, the metal shell continues to undergo significant plastic deformation when subjected to an external force to a certain extent, even without increasing the load. I.e., the yield limit, is the stress required to cause permanent deformation of the metal shell. When the external force borne by the metal expansion shell exceeds the elastic limit of the metal expansion shell, although the stress is not increased any more, the metal expansion shell still generates obvious plastic deformation, the phenomenon is called yielding, namely when the metal expansion shell bears the external force to a certain degree, the deformation of the metal expansion shell is not in direct proportion to the external force to generate obvious plastic deformation, and the stress generated when the metal expansion shell generates yielding is called the yield limit.
In specific implementation, the metal expansion shell can be implemented in various structural forms, one of which is described below: as shown in fig. 1, the metal shell may include alternately arranged sleeve portions 21 and connecting portions 22, the sleeve portions 21 are configured to be sleeved on the rod body, and the connecting portions 22 include a plurality of connecting strips configured to connect two adjacent sleeve portions 21.
That is to say, the metal shell that expands establishes portion and connecting portion including the cover that sets up in turn, and the portion is established for the cover tubulose, can overlap and establish the body of rod. And connecting portion are used for connecting two cover of both sides and establish the portion, and connecting portion include a plurality of connecting strips, and each connecting strip is connected between two cover of both sides and is established the portion, and each connecting strip forms the connecting portion of fretwork. When compressed, the sleeve part and the connecting part are deformed.
Wherein, the middle of each connecting strip can be a convex shape, so that the connecting part deforms towards the convex direction. The term "convex" means a shape that is convex outward in the diameter direction. When the metal expansion shell is subjected to compressive force, the metal expansion shell can deform, and the purpose of arranging the protrusions is to control the deformation direction. Because the centre of connecting portion is outside protruding, connecting portion can outwards be deformed when deformation like this, and inside deformation or other orientation deformation are not so convenient for firmly inlay in the rock cavern.
In specific implementation, the length of the rod body can be set according to needs, for example, the length of the rod body is set within the range of 1.5m to 5.0 m.
In specific implementation, the diameter of the rod body can be set according to needs, for example, the diameter of the rod body is set to be in the range of 12 mm-38 mm.
In specific implementation, the metal expansion shell can be made of carbide steel.
In specific implementation, the rod body may be made of metal or metal alloy material, for example, steel material.
In a second aspect, the present invention provides a method of installing a transmission expansion type anchor provided in the first aspect, the method including:
s110, installing the transmission expansion type anchor rod into a rock hole pre-drilled on a top plate of a roadway or a stope; the first end of the rod body is arranged outside the rock hole;
s120, rotating the transmission nut to enable the transmission nut to compress the metal expansion shell until the compression force applied to the metal expansion shell exceeds the yield limit of the metal expansion shell, and enabling the metal expansion shell to generate expansion deformation so as to extrude the surrounding rock of the rock hole and anchor the surrounding rock.
It will be appreciated that when the drive nut cannot be screwed, the metal shell is subjected to a compressive force exceeding the yield limit of the metal shell.
When will transmission inflation formula stock is packed into the rock bore, through rotatory drive nut, drive nut can be right the metal shell that expands compresses, works as the compressive force that the metal shell that expands received surpasses during the yield limit of the metal shell that expands, the metal shell that expands produces the expansion deformation, the diameter of the metal shell that expands like this has little grow, can make the metal shell that expands firmly inlay in the rock bore, produces very big frictional force, produces powerful extrusion force to the country rock in rock bore, can be right promptly the country rock in rock bore extrudees to the effect of anchor country rock.
The invention provides a transmission expansion type anchor rod and an installation method thereof. In addition, as hydraulic equipment, an air drill, an electric drill or an air operated stirrer and other wind, electric and mechanical equipment are not needed in the installation process, wind, electric and mechanical accidents cannot be caused in the installation process, and the installation quality is guaranteed; and the installation is very convenient, and the installation time is also very short. In addition, mortar, explosive rolls and the like can not be produced in the installation process, and the environment can not be polluted.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A drive expansion bolt, comprising: the metal expansion shell is sleeved on the rod body, and the transmission nut is arranged at the first end of the rod body; the transmission nut is used for compressing the metal expansion shell by rotating the transmission nut when the transmission expansion type anchor rod is installed in a rock hole; the metal expansion shell is used for generating expansion deformation when the compression force exceeds the yield limit of the metal expansion shell so as to extrude the surrounding rock of the rock hole and anchor the surrounding rock.
2. The transmission expansion anchor rod according to claim 1, wherein the metal expansion shell includes alternately arranged sleeve portions for being sleeved on the rod body and connecting portions including a plurality of connecting strips for connecting adjacent two sleeve portions.
3. The transmission expansion anchor of claim 2, wherein each of the connecting strips has a convex shape in the middle to deform the connecting portion in a convex direction.
4. The transmission expansion anchor as claimed in claim 1, wherein the length of the rod body is in the range of 1.5m to 5.0 m.
5. The transmission expansion anchor of claim 1, wherein the rod has a diameter in the range of 12mm to 38 mm.
6. The transmission expansion bolt according to claim 1, wherein the metal shell is a steel carbide.
7. The transmission expansion anchor of claim 1, wherein the shank is of steel.
8. A method of installing a transmission expansion type anchor rod, wherein the transmission expansion type anchor rod is the transmission expansion type anchor rod according to any one of claims 1 to 7, the method comprising:
the transmission expansion type anchor rod is arranged in a rock hole which is drilled in advance on a top plate of a roadway or a stope; the first end of the rod body is arranged outside the rock hole;
and rotating the transmission nut to enable the transmission nut to compress the metal expansion shell until the compressive force applied to the metal expansion shell exceeds the yield limit of the metal expansion shell, so that the metal expansion shell generates expansion deformation to extrude the surrounding rock of the rock hole and anchor the surrounding rock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110673257.3A CN113323702A (en) | 2021-06-17 | 2021-06-17 | Transmission expansion type anchor rod and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110673257.3A CN113323702A (en) | 2021-06-17 | 2021-06-17 | Transmission expansion type anchor rod and installation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113323702A true CN113323702A (en) | 2021-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110673257.3A Pending CN113323702A (en) | 2021-06-17 | 2021-06-17 | Transmission expansion type anchor rod and installation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN113323702A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5011337A (en) * | 1988-10-28 | 1991-04-30 | The Eastern Company | Mine roof expansion anchor shell and leaf |
| CN2542830Y (en) * | 2002-04-16 | 2003-04-02 | 济南澳科矿山工程技术有限公司 | Mine anchorage cable |
| CN102155015A (en) * | 2011-03-01 | 2011-08-17 | 中国有色金属工业昆明勘察设计研究院 | Barbed implanted steel pipe anchor rod |
| CN202882968U (en) * | 2012-10-24 | 2013-04-17 | 西安科技大学 | Multi-anchoring-point anchor rod without resin |
| CN203430543U (en) * | 2013-08-07 | 2014-02-12 | 李贤勇 | Expansion anchor rod |
| CN104018863A (en) * | 2014-05-16 | 2014-09-03 | 山东科技大学 | Multi-section-expansion yielding prestress grouting anchor rod and using method thereof |
| CN206053978U (en) * | 2016-08-22 | 2017-03-29 | 山东科技大学 | A kind of new expansion grouted anchor bar |
| CN107130616A (en) * | 2017-06-13 | 2017-09-05 | 重庆科技学院 | Adjustable type side slope protective screen damps anchoring assembly |
| CN206721876U (en) * | 2017-05-09 | 2017-12-08 | 王占奎 | A kind of high pre-stress anchor pole with expansion sleeve |
| CN108560547A (en) * | 2018-06-15 | 2018-09-21 | 沙洲职业工学院 | A kind of mine slope protection network anchor pole |
| CN108756979A (en) * | 2018-06-29 | 2018-11-06 | 武汉科技大学 | A kind of overall length reverse wedge formula prestressed anchor and its application method |
| CN110469353A (en) * | 2019-08-14 | 2019-11-19 | 四川大学 | Mechanical prestressed anchor and its installation and recovery method can be recycled in one kind |
| CN211397620U (en) * | 2019-09-04 | 2020-09-01 | 谢时雳 | Recoverable expanding anchor rod |
-
2021
- 2021-06-17 CN CN202110673257.3A patent/CN113323702A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5011337A (en) * | 1988-10-28 | 1991-04-30 | The Eastern Company | Mine roof expansion anchor shell and leaf |
| CN2542830Y (en) * | 2002-04-16 | 2003-04-02 | 济南澳科矿山工程技术有限公司 | Mine anchorage cable |
| CN102155015A (en) * | 2011-03-01 | 2011-08-17 | 中国有色金属工业昆明勘察设计研究院 | Barbed implanted steel pipe anchor rod |
| CN202882968U (en) * | 2012-10-24 | 2013-04-17 | 西安科技大学 | Multi-anchoring-point anchor rod without resin |
| CN203430543U (en) * | 2013-08-07 | 2014-02-12 | 李贤勇 | Expansion anchor rod |
| CN104018863A (en) * | 2014-05-16 | 2014-09-03 | 山东科技大学 | Multi-section-expansion yielding prestress grouting anchor rod and using method thereof |
| CN206053978U (en) * | 2016-08-22 | 2017-03-29 | 山东科技大学 | A kind of new expansion grouted anchor bar |
| CN206721876U (en) * | 2017-05-09 | 2017-12-08 | 王占奎 | A kind of high pre-stress anchor pole with expansion sleeve |
| CN107130616A (en) * | 2017-06-13 | 2017-09-05 | 重庆科技学院 | Adjustable type side slope protective screen damps anchoring assembly |
| CN108560547A (en) * | 2018-06-15 | 2018-09-21 | 沙洲职业工学院 | A kind of mine slope protection network anchor pole |
| CN108756979A (en) * | 2018-06-29 | 2018-11-06 | 武汉科技大学 | A kind of overall length reverse wedge formula prestressed anchor and its application method |
| CN110469353A (en) * | 2019-08-14 | 2019-11-19 | 四川大学 | Mechanical prestressed anchor and its installation and recovery method can be recycled in one kind |
| CN211397620U (en) * | 2019-09-04 | 2020-09-01 | 谢时雳 | Recoverable expanding anchor rod |
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