CN107747500A - A kind of pressure-relieving achor bar - Google Patents
A kind of pressure-relieving achor bar Download PDFInfo
- Publication number
- CN107747500A CN107747500A CN201711125278.1A CN201711125278A CN107747500A CN 107747500 A CN107747500 A CN 107747500A CN 201711125278 A CN201711125278 A CN 201711125278A CN 107747500 A CN107747500 A CN 107747500A
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- rod
- sleeve pipe
- pressure
- steel ball
- relieving achor
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- QLMNCUHSDAGQGT-UHFFFAOYSA-N sintofen Chemical compound N1=C(C(O)=O)C(=O)C=2C(OCCOC)=CC=CC=2N1C1=CC=C(Cl)C=C1 QLMNCUHSDAGQGT-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims description 54
- 239000010959 steel Substances 0.000 claims description 54
- 239000007769 metal material Substances 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 7
- 238000010008 shearing Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000000338 in vitro Methods 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 31
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000003245 working effect Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
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- 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)
- Road Signs Or Road Markings (AREA)
Abstract
The present invention relates to the mooring rod technique field in roadway support, in particular to a kind of pressure-relieving achor bar.The invention discloses a kind of pressure-relieving achor bar, including the body of rod, the sleeve pipe and screens ring that are set in outside the body of rod.One end of sleeve pipe is provided with pallet.Screens ring is used for engaging of the sleeve pipe with the body of rod.The pressure-relieving achor bar includes being relatively fixed the body of rod, the sleeve pipe being set in outside the body of rod and the screens ring being embedded between sleeve pipe and the body of rod in drilling.The pressure-relieving achor bar device can provide high steady resistance, big stroke yield supporting for roadway surrounding rock, suitable for large deformation, the stability control of workings subject to dy namic pressure country rock and impulsion pressure diaster prevention and control.
Description
Technical field
The present invention relates to the mooring rod technique field in roadway support, in particular to a kind of pressure-relieving achor bar device.
Background technology
For the difficult supported laneway with high-ground stress and the big feature of rock deformation, supporting construction not only needs high-strength branch
Support force, it is also desirable to have the characteristics of yield supporting.
Although having had a variety of pressure-relieving achor bars at present, a little deficiencies more or less be present in these anchor poles.
Such as：Using the pressure-relieving achor bar of elastic deformation caused by constant-resistance device, supporting power slightly has deficiency, it is difficult to resists dynamic pressure
Under the influence of country rock large deformation.
Surrouding rock deformation is resisted using active force caused by multistage latch failure by shear process, although supporting power is carried
Height, but due to space be present in multistage latch, it is difficult to stable supporting is realized to surrouding rock deformation.
To sum up, existing pressure-relieving achor bar technology is primarily present the problem of supporting is unstable and intensity is not high.
The content of the invention
It is an object of the invention to provide a kind of pressure-relieving achor bar, the pressure-relieving achor bar utilizes the anchor pole of the invention designed
The body of rod, the mechanical device that is formed of the steel ball in sleeve pipe and screens ring, there is the yield supporting function of anchor pole.When the bar of anchor pole
Body axle power is not reaching to setting and allows pressure limiting value, and the body of rod of anchor pole blocks with sleeve pipe by the steel ball in screens ring, and both do not occur
The changing of the relative positions, this stage pressure-relieving achor bar and supporting function phase of the conventional anchor pole to roadway surrounding rock are same.When the axle power in pressure-relieving achor bar reaches
Setting allow pressure limiting value (generally 80% or so of the body of rod ultimate strength of anchor pole) when, steel ball in screens ring is along on the inside of sleeve pipe
Plasticity shearing slip occurs for the axially cutting tube wall of anchor pole, opens yield supporting function.Due to the Plastic Flow limit of metal material
It is metastable, so now the yield supporting resistance of anchor pole will also keep stable.The maximum of the pressure-relieving achor bar allows pressure to slide
Length is the distance of two on-slip inner rooms, so pressure stroke can be adjusted.When two anti-skid sheaths lean, the anchor pole will be extensive
The function of multiple conventional anchor pole.
Therefore, the pressure-relieving achor bar has high steady resistance yield supporting characteristic, can adapt to difficult supported laneway country rock large deformation and
Dynamic pressure acts on.Specially：In the roadway surrounding rock small deformation stage, anchor pole can provide timely and stable Support Resistance, safeguard country rock
Stability；When country rock is acted on by dynamic pressure or produces large deformation, the anchor pole has the mechanical performance of high steady resistance yield supporting, can tie up
The stability of surrounding rock supporting is protected, avoids occurring the phenomenon of the supporting failure such as anchor pole fracture.Furthermore it is also possible to by adjusting sleeve pipe
Length changes the distance of yield supporting, improves the scope of application of the pressure-relieving achor bar.
What embodiments of the invention were realized in：
The body of rod；
The sleeve pipe being set in outside the body of rod, one end of sleeve pipe are provided with pallet；
And screens ring, screens ring are used for engaging of the sleeve pipe with the body of rod.
The pressure-relieving achor bar is including the body of rod being relatively fixed in drilling, the sleeve pipe being set in outside the body of rod and is embedded in sleeve pipe
Screens ring between the body of rod.
The body of rod and sleeve pipe are engaged by the steel ball in screens ring, the body of rod is united with sleeve pipe.In the rockbolt installation
At the beginning of, when anchor axial force be not reaching to allow pressure limiting force before, its supporting mechanism is identical with conventional anchor pole；When anchor axial force reaches
Allow pressure ultimate resistance when, the steel ball that the anchor pole allows unlatching in pressure function, namely screens ring can be along the bolt shaft of internal surface of sleeve pipe
To slip, its mechanism is：The the second anti-skid sheath extruding steel ball being fixed on the body of rod, makes the power of steel ball Casing-Cutting inwall reach it
The plastic strength limit, Plastic Flow sliding is formed, the anchor pole is in yield supporting state；When the second anti-skid sheath and the first on-slip
When set supports conjunction, the anchor pole is again identical with conventional anchor pole.Therefore, the anchor pole has high steady resistance yield supporting function, can safeguard tunnel
Surrounding rock stability when large deformation and dynamic pressure.
In an embodiment of the present invention：
Screens ring includes some steel balls and to inlay the steel ball sleeve of steel ball, and is steel ball in steel ball sleeve in the body of rod and set
Snap action is played between pipe.
In an embodiment of the present invention：
The strength degree and yield limit of steel ball sleeve are more than the strength degree and yield limit of the body of rod；
The strength degree and yield limit of the body of rod are more than the strength degree and yield limit of sleeve pipe.
In an embodiment of the present invention：
The body of rod and sleeve pipe are made by metal material.
In an embodiment of the present invention：
Intermediate incline is formed at the exposed mouth of pallet, for being embedded in screens ring during initially installation anchor pole.
In an embodiment of the present invention：
Sleeve pipe and pallet coadunation are integrally formed.
In an embodiment of the present invention：
Inwall of the sleeve pipe away from pallet one end is provided with the first anti-skid sheath；
Outer wall of the body of rod close to pallet one end is provided with the second anti-skid sheath, and the anti-skid sheath is nut, passes through body of rod outer end
It is threadably mounted on the body of rod, and the steel ball in screens ring can be extruded by tightening nut to make anchor pole obtain just in rockbolt installation
Beginning anchor force；
After for the steel ball in screens ring along internal surface of sleeve pipe plasticity shearing (cutting tube wall) flowing occurs for the first anti-skid sheath
With the second anti-skid sheath against to prevent the body of rod of pressure-relieving achor bar from being separated with sleeve pipe；
The body of rod axle of anchor pole when plasticity shearing (cutting tube wall) slides occurs for inwall of the steel ball along sleeve pipe in screens ring
Power (allow pressure resistance) be gap between the strength of materials and the body of rod and sleeve pipe by sleeve pipe, steel ball diameter, steel ball arrangement
(including steel ball number) is determined；Typically its axle power (allow pressure resistance) is set in 80% or so of the lever strength of anchor pole.
In an embodiment of the present invention：
First anti-skid sheath and the second anti-skid sheath are made by metal material.
Technical scheme at least has the advantages that：
Pressure-relieving achor bar provided by the invention using the body of rod of anchor pole, sleeve pipe and screens ring group into mechanical system have and allow pressure
The function of supporting, the complex deformation state of supported laneway large deformation and dynamic pressure can be used for, high maintenance its surrouding rock deformation control
Stability.Specifically, at rockbolt installation initial stage, the body of rod and sleeve pipe of anchor pole are stuck by the steel ball in screens card, therefore this rank
Section has the same function of conventional anchor pole；The anchor pole can be continuously increased with surrouding rock deformation, axle power, when its axle power increases to setting
Allow pressure resistance when, its screens steel ball slides along the axially cutting tube wall of internal surface of sleeve pipe anchor pole, and anchor pole enters yield supporting state；When
When conjunction occurs to support for the second anti-skid sheath and the first anti-skid sheath, the anchor pole recovers conventional anchor pole function again.Due to the plasticity of metal material
Ultimate strength is relatively stable, so the plastic limit resistance of steel ball resistance to compression cutting tube wall is relatively stable, we can set
It is fixed its allow pressure resistance is anchor rod ultimate intensity 80% or so, then the anchor pole stable high yield supporting resistance can be provided, adapt to
Large deformation and the control of workings subject to dy namic pressure surrounding rock stability.Furthermore it is also possible to adjust the length of sleeve pipe, the scope of yield supporting is adapted to.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the structural representation of pressure-relieving achor bar in the embodiment of the present invention；
Fig. 2 is the structural representation of the body of rod in the embodiment of the present invention；
Fig. 3 is the enlarged diagram at IV in Fig. 1；
Fig. 4 is the structural representation of anchoring section in the embodiment of the present invention.
Icon：200- pressure-relieving achor bars；The 210- bodies of rod；220- sleeve pipes；221- pallets；The anti-skid sheaths of 222- first；212- second
Anti-skid sheath；300- roadway surrounding rocks；310- anchoring sections；230- screens rings；231- steel ball sleeves；232- steel balls.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be configured to arrange and design with a variety of.
Therefore, below the detailed description of the embodiments of the invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
In the description of embodiment of the present invention, it is necessary to explanation, term " interior ", " under " etc. instruction orientation or position
Relation be based on orientation shown in the drawings or position relationship, or the invention product using when the orientation or position usually put
Relation, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must have
There is specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " the
One ", " second " etc. is only used for distinguishing description, and it is not intended that instruction or hint relative importance.
In the description of embodiment of the present invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term
" setting ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly be connected
Connect；Can mechanically connect, can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion.For the ordinary skill in the art, the tool of above-mentioned term in the present invention can be understood with concrete condition
Body implication.
Embodiment
The invention provides a kind of pressure-relieving achor bar 200, the body of rod for the anchor pole that the pressure-relieving achor bar 200 is designed using the present invention
210th, the yield supporting function that the mechanical device that sleeve pipe 220 and screens ring 230 form has, suitable for supporting large deformation and dynamic pressure
Impulsion pressure occurs for the complex deformation state of roadway surrounding rock 300, the stability and preventing and treating country rock of deformation controlling for rock surrounding gateways.
It refer to Fig. 1 and Fig. 2, Fig. 1 and Fig. 2 show the concrete structure of the pressure-relieving achor bar 200 provided in embodiment.
As can be seen that the pressure-relieving achor bar 200 includes the body of rod 210, sleeve pipe 220 and screens ring 230 from Fig. 1 and Fig. 2.
Wherein, the sleeve pipe 220 being set in outside the body of rod 210, and one end of sleeve pipe 220 is provided with pallet 221.
Further, in the present embodiment, refer to Fig. 3 and combine figure and Fig. 2, screens ring 230 includes the He of steel ball sleeve 231
Steel ball 232, steel ball 232 is used for the engaging with the body of rod 210 of sleeve pipe 220 in steel ball sleeve 231.Sleeve pipe 220 is made by this engaging
An entirety is unified into the body of rod 210.
After the rockbolt installation is good, deformed with roadway surrounding rock 300, the axle power in the body of rod 210 of anchor pole can incrementally increase, bar
Contact squeeze power between body 210, steel ball 232 and the three of sleeve pipe 220 also increases therewith, but is being not reaching to the contact failure limit
Before, three position is relatively fixed, and the changing of the relative positions will not occur, and now the supporting characteristic of the anchor pole is identical with conventional anchor pole, with enclosing
Rock deformation further increase, anchor axial force reach setting allow pressure resistance limiting value when, steel ball 232 extruding cutting tube wall, the body of rod
210 occur the relative changing of the relative positions with sleeve pipe 220, pressure-relieving achor bar 200 is entered yield supporting state；When the second anti-skid sheath 212 is with allowing
When pressure sliding supports conjunction to the first anti-skid sheath 222, the anchor pole is again same with conventional suspension roof support function phase.
It should be noted that the pressure-relieving achor bar 200 includes pallet 221, pallet 221 be arranged on the end of sleeve pipe 220 and
It is bonded with the country rock of foot of hole, when country rock deforms, external force caused by its deformation can be applied on pallet 221, and
So that the sleeve pipe 220 of the pressure-relieving achor bar 200 possesses and become along what the axis of pressure-relieving achor bar 200 moved under the drive of pallet 221
Gesture.And when setting pallet 221, pallet 221 can use integrally formed manufacture with sleeve pipe 220.
In addition, in the present embodiment, in order to improve the overall performance of the pressure-relieving achor bar 200, improve the stability of supporting with
And intensity, therefore the structure member of the pressure-relieving achor bar 200 is manufactured using metal material.Especially the body of rod 210, sleeve pipe 220 and
Steel ball sleeve 231 is made by metal material.
Further, in the present embodiment, the strength degree of steel ball 232 and yield limit are more than the intensity pole of the body of rod 210
Limit and yield limit, the strength degree and yield limit of the body of rod 210 are more than the strength degree and yield limit of sleeve pipe 220.Thus,
Among the body of rod 210, steel ball 232 and sleeve pipe 220, the strength degree and yield limit of sleeve pipe 220 are minimum, so,
Allow the pressure stage to be that steel ball 232 extrudes Casing-Cutting 220 in the anchor pole, make the inwall of sleeve pipe 220 that local plastic clipping occur and destroy, should
There is anchor pole high steady resistance to allow pressure function.
It is remote in sleeve pipe 220 and the facing sleeve 220 of the body of rod 210 to prevent pressure-relieving achor bar 200 from coming off during use
Inwall from the one end of pallet 221 is provided with the first anti-skid sheath 222, and outer wall of the body of rod 210 close to the one end of pallet 221 is provided with second
Anti-skid sheath 212, the first anti-skid sheath 222 is used to lean with the second anti-skid sheath 212 at the end of yield supporting stroke, to play
At the end of yield supporting, the body of rod 210 in pressure-relieving achor bar 200 is avoided to be separated with sleeve pipe 220.And the first anti-skid sheath 222 and
Second anti-skid sheath 212 is made by metal material.
It refer to Fig. 4 and combine Fig. 1-3, the operation principle of the pressure-relieving achor bar 200 is：
Installation:Punching, insertion anchor pole, anchoring be upper surely hinder sleeve pipe 220, the ring 230 that is loaded, load onto the second anti-skid sheath 212-
Tighten, extrude steel ball 232-have initial set initial stage, anchor pole and steady resistance sleeve pipe 220 are by the hole clipping of screens steel ball 232, with deformation anchor
The increase of bar axle power, it is same with conventional anchor pole function phase.
Large deformation dynamic pressure stage, the axle power of the body of rod 210 increase to 80% or so the intensity of the body of rod 210, and the extruding force of steel ball 232 makes
Plastic yielding deformation is sent out at the steady resistance extruding of sleeve pipe 220, the flowing of the shearing slip of steel ball 232, opens yield supporting.
Second anti-skid sheath 212 and the first on-slip rope are against yield supporting terminates, and anchor pole is again same with conventional anchor pole function phase.
In order to realize that this example quickly can play a part of active support to country rock, it is desirable to which the second anti-skid sheath 212 is
Nut structure, and there is the screw thread to match therewith the outer end of the body of rod 210, after pressure-relieving achor bar 200 is installed into drilling, with anchoring section 310
Formed, tighten nut in time, extruding screens ring 230, make anchor pole that there is first anchor-hold.
With the increase of surrouding rock deformation, extruding force is contacted with each other increasingly between the body of rod 210, steel ball 232 and sleeve pipe 220
Greatly, because the yield strength of steel ball 232 is more than the body of rod 210 and sleeve pipe 220, and 220 various intensity of sleeve pipe are minimum between three, institute
Plastic yielding can occurred first with the contact position of steel ball 232 with the inwall of sleeve pipe 220, producing plasticity shear flow.At this moment, bar
Relative movement vertically is produced between body 210 and sleeve pipe 220, elongation strain of the mechanism with anchor pole in the case where stablizing axle power is relative
Should, form yield supporting.
Specifically, when country rock occurs small deformation or has the trend of deformation, the axle power in the body of rod 210 is smaller, is delivered to
Contact force between three is also small, and Plastic Flow is produced insufficient for the inwall contact position of sleeve pipe 220.As country rock further becomes
Shape, contact force constantly increase, and after plastic limit is reached, plasticity shearing takes place with the contact position of steel ball 232 in the inwall of sleeve pipe 220
Flowing, that is, start yield supporting.For metal material after plasticity shear flow occurs, intensity is high and stably, will not occur to lose suddenly
The phenomenon of effect, it is possible to achieve the effect of high steady resistance yield supporting.The length of sleeve pipe 220 is the length of yield supporting, according to not
The different requirements that same mining area, different roadway surrounding rocks 300 deform, can adjust the length of yield supporting, have stronger adaptability.
To sum up, the present invention is special using metal material plasticity shear flow in the control large deformation of roadway surrounding rock 300 and dynamic pressure
Property, the mechanical system of the body of rod 210, screens ring 230 and sleeve pipe 220 composition of anchor pole is designed, yield supporting can be realized, simultaneously
Keep high stable resistance, the considerably long distance of yield supporting, for safeguarding the large deformation of roadway surrounding rock 300, preventing roadway deformation energy
The accident such as impulsion pressure, fried side has positive role to amount caused by release suddenly.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (8)
- A kind of 1. pressure-relieving achor bar, it is characterised in that including：The body of rod；The sleeve pipe being set in outside the body of rod, one end of described sleeve pipe are provided with pallet；And screens ring, the screens ring are used for described sleeve pipe engaging with the body of rod.
- 2. pressure-relieving achor bar according to claim 1, it is characterised in that：The screens ring includes some steel balls and to inlay the steel ball sleeve of steel ball, and is steel ball in the steel ball sleeve described Snap action is played between the body of rod and described sleeve pipe.
- 3. pressure-relieving achor bar according to claim 2, it is characterised in that：The strength degree and yield limit of the steel ball sleeve are more than the strength degree and yield limit of the body of rod；The strength degree and yield limit of the body of rod are more than the strength degree and yield limit of described sleeve pipe.
- 4. pressure-relieving achor bar according to claim 1, it is characterised in that：The body of rod and described sleeve pipe are made by metal material.
- 5. pressure-relieving achor bar according to claim 1, it is characterised in that：Intermediate incline being formed at the exposed mouth of the pallet, being embedded in the screens ring during for initially installing the anchor pole.
- 6. pressure-relieving achor bar according to claim 1, it is characterised in that：Described sleeve pipe and the pallet coadunation are integrally formed.
- 7. pressure-relieving achor bar according to claim 1, it is characterised in that：Inwall of the described sleeve pipe away from described pallet one end is provided with the first anti-skid sheath；Outer wall of the body of rod close to described pallet one end is provided with the second anti-skid sheath, and the anti-skid sheath is nut, passes through the bar That holds in vitro is threadably mounted on the body of rod, and can be extruded in the rockbolt installation by tightening the nut in the screens ring Steel ball and anchor pole is obtained initial anchor force；Along described sleeve pipe inwall plasticity shearing (cutting pipe occurs for the steel ball that first anti-skid sheath is used in the screens ring Wall) flowing after with second anti-skid sheath against to prevent the body of rod of the pressure-relieving achor bar from being separated with sleeve pipe；Anchor pole during plasticity shearing (cutting tube wall) sliding occurs for inwall of the steel ball along described sleeve pipe in the screens ring Body of rod axle power (allow pressure resistance) be gap between the strength of materials and the body of rod and sleeve pipe by sleeve pipe, steel ball it is straight What the arrangement (including steel ball number) in footpath, steel ball was determined；Its axle power (allow pressure resistance) is typically set in the bar of the anchor pole 80% or so of body intensity.
- 8. pressure-relieving achor bar according to claim 7, it is characterised in that：First anti-skid sheath and second anti-skid sheath are made by metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711125278.1A CN107747500B (en) | 2017-11-14 | 2017-11-14 | Yielding anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711125278.1A CN107747500B (en) | 2017-11-14 | 2017-11-14 | Yielding anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107747500A true CN107747500A (en) | 2018-03-02 |
| CN107747500B CN107747500B (en) | 2024-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711125278.1A Active CN107747500B (en) | 2017-11-14 | 2017-11-14 | Yielding anchor rod |
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|---|---|
| CN (1) | CN107747500B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425696A (en) * | 2018-04-27 | 2018-08-21 | 中铁第四勘察设计院集团有限公司 | A kind of pressure-relieving achor bar and its method for protecting support locally waxed |
| CN109915188A (en) * | 2019-04-16 | 2019-06-21 | 中国矿业大学 | A kind of high-strength surely hinder detachable pushes back half davit and wall rock deformation monitoring method |
| CN109931085A (en) * | 2019-04-16 | 2019-06-25 | 中国矿业大学 | A kind of steady resistance energy-absorbing glass fibre reinforced plastics rockbolts with application pretightning force function |
| CN110005457A (en) * | 2019-04-16 | 2019-07-12 | 中国矿业大学 | A kind of high-strength steady resistance energy-absorbing anchor cable with application pretightning force function |
| CN112922652A (en) * | 2021-03-01 | 2021-06-08 | 华能煤炭技术研究有限公司 | Hierarchical tensile anchor rod and supporting system |
| CN114635731A (en) * | 2022-03-21 | 2022-06-17 | 中国矿业大学 | Coal mine underground glass fiber reinforced plastic large-deformation support anchor rod |
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