CN207829928U - Fork-shaped anchor pole for anchoring breaking roof coal body - Google Patents
Fork-shaped anchor pole for anchoring breaking roof coal body Download PDFInfo
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- CN207829928U CN207829928U CN201720828508.XU CN201720828508U CN207829928U CN 207829928 U CN207829928 U CN 207829928U CN 201720828508 U CN201720828508 U CN 201720828508U CN 207829928 U CN207829928 U CN 207829928U
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- headtree
- bolt body
- drive rod
- fork
- engaging lug
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- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000004873 anchoring Methods 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 206010058109 Hangnail Diseases 0.000 claims description 32
- 238000009434 installation Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 239000011435 rock Substances 0.000 abstract description 11
- 239000002689 soil Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 9
- 238000005553 drilling Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
Fork-shaped anchor pole for anchoring breaking roof coal body, including bolt body, drive rod, first headtree and the second headtree, positioning pin, pallet and nut, left and right side offers a slot hole respectively in the middle part of bolt body, drive rod is plugged in bolt body upwards by bolt body lower end, drive rod upper end is located between two slot holes, drive rod upper end, first headtree lower end and the second headtree lower end are hinged by an axis pin, first headtree upper end and the second headtree upper end are each passed through a slot hole and are obliquely installed upwards, it is provided with self-locking positioning mechanism between first headtree and the second headtree.The fork-shaped Soil Anchor Design of the utility model is reasonable, compact-sized, improves anchoring area, increases broken top plate coal body anchoring range, improves the internal friction angle of breaking surrounding rock, improve intensity behind whole peak, improve the anchoring effect of broken top plate coal body.
Description
Technical field
The utility model belongs to Safety of Coal Mine Production technical field, and in particular to a kind of for anchoring breaking roof coal body
Fork-shaped anchor pole.
Background technology
High seam is general to arrange that stope drift active workings, top plate are thicker coal body by the way of digging coal road the bottom of along.Therefore, it is adopting
Under dynamic stress, tectonic stress meter country rock expansion, top coal is often more broken, and discontinuous feature is presented.Broken coal cinder
Engaged in the form of frictional force between coal cinder, strength of roof depends on frictional force, and roof deformation is squeezed by horizontal stress
With roof cracking dilatation joint effect.Anchor pole failure is mainly due to some or all of mistake between anchor rod anchored section and country rock body
Remove mechanical correlation so that anchor pole fails to cannot normally play anchorage effect in end anchorage with institute's supporting rock mass disengaging
When, anchor pole also just loses reinforcing and the support action to country rock.For weak coal road, anchor pole failure probability bigger, Anchor Agent
It is its main failure forms with rock mass discontinuity destruction is enclosed.The utility model is to reinforce soft broken top plate coal body, is prevented
Roof fall accident, to improve anchor rod anchored effect, enhances anchoring property, and then improve mine by the structure of modification to existing anchor pole
Well production safety technical merit.
Utility model content
The utility model provides a kind of reliability promoting anchor pole, improves to solve shortcoming in the prior art
The fork-shaped anchor pole for anchoring breaking roof coal body of anchoring effect, enhancing anchoring soft broken top plate coal body performance.
In order to solve the above technical problems, the utility model adopts the following technical solution：For anchoring breaking roof coal body
Fork-shaped anchor pole, including bolt body, drive rod, the first headtree and the second headtree, positioning pin, pallet and nut, anchor pole sheet
Body is hollow structure and upper end blocks lower end opening, and left and right side offers one about anchor pole sheet respectively in the middle part of bolt body
The length direction of the symmetrical slot hole in body center, slot hole is parallel to bolt body center line, and nut thread is connected to bolt body
Lower end outer circle, pallet are sleeved on outside bolt body lower end and on nut, and drive rod is plugged in upwards by bolt body lower end
In bolt body, drive rod upper end is located between two slot holes, and drive rod lower end is flushed with bolt body lower end, and positioning pin is located at
Simultaneously it is arranged along bolt body radial direction above pallet, positioning pin passes through bolt body and drive rod, drive rod upper end, first point
Fork arm lower end and the second headtree lower end are hinged by an axis pin, and the first headtree upper end and the second headtree upper end are worn respectively
It crosses a slot hole to be obliquely installed upwards, self-locking positioning mechanism is provided between the first headtree and the second headtree.
Self-locking positioning mechanism includes horizontally disposed sleeve and guide rod, and the first connection is fixedly installed on the right side of the first headtree
Ear, the second headtree left side are fixedly installed the second engaging lug, and guide rod is plugged in sleeve and between having between sleeve lining
Gap, guide rod right end stretch out sleeve, are fixedly installed the third engaging lug hinged with the first engaging lug on the left of lower cartridge, under guide rod
It is fixedly installed fourth engaging lug hinged with the second engaging lug on the right side of portion, left and right ends are arranged on sleeve and are connected respectively with third
First compressed spring of lug and the cooperation of the 4th engaging lug top pressure, guide rod left upper portion offer the locating slot of open top, cover
Cylinder right end lower part offers long slot bore in the axial direction, is extend on the left of the 4th engaging lug in long slot bore and the first compressed spring top
Press contacts, sleeve right end top are radially fixedly connected there are one casing, and sleeve upper end is fixedly connected with closure plate, in casing
Be provided with the second compressed spring and the positioning column below the second compressed spring, the second compressed spring top and bottom respectively with
Closure plate and the cooperation of positioning column top pressure, positioning column lower end are contacted with top pressure at the top of guide rod.
Drive rod upper end offers installation slotted eye in the axial direction, and the first headtree upper end and the second headtree upper end are
Pointed structures, the first headtree lower end and the second headtree lower end are flat structure, the flat knot of the first headtree lower end
It is extend into after structure bending to the right and the flat structure bending to the left of the second headtree lower end in installation slotted eye through the pin
Axis is hinged with drive rod upper end.
Spiral prominence cord is provided with outside bolt body in the axial direction.
The outer surface of first headtree and the second headtree is evenly arranged with several row's hangnail groups along its length, and often row falls
Thorn group is uniformly arranged along the circumferencial direction of headtree, and the distance between adjacent two rows hangnail group is 25mm, is often arranged in hangnail group
The length of every hangnail be 10mm, the distance for often arranging adjacent two hangnails in hangnail group is 5mm, and the upper end of every hangnail is equal
It is fixedly connected with the outer surface of headtree, every hangnail is 15 ° with the angle of headtree center line.
The installation method of the fork-shaped anchor pole, includes the following steps,
（1）, using drilling machine after roadway surrounding rock up-hole, drilling via formations, Anchor Agent is injected in drilling；
（2）And then bolt body is inserted into drilling, the power output end of bolt body lower end and jumbolter connects,
Jumbolter drives bolt body rotation, bolt body stirring Anchor Agent to solidification to reach nominal torque；
（3）, the first headtree and the second headtree are closed up after be inserted into jumbolter from bottom to top, first compression
Under the action of spring, the first headtree upper left-hand and the second headtree upper right connect with bolt body inner wall top pressure respectively
It touches, pushes up drive rod, the first headtree upper end and the second headtree upper end are each passed through the length of the slot hole and right side in left side
It is continued to move up behind hole, under the restriction at the slot hole upper end edge of bolt body, the first headtree and the second headtree are with pin
Axis centered on axis, the first headtree upper end and the second headtree are diverged to the left and to the right respectively, the set being connect with the first headtree
Cylinder be moved to the left, guide rod connect with the second headtree moves right, after the locating slot on guide rod top exposes sleeve to the right and
When above and below positioning column to corresponding under the action of the second compressed spring, positioning column lower part is pressed into locating slot, thus by guide rod
It positions with sleeve axial direction, thus positions the first headtree and the second headtree, at this time bolt body and drive rod diameter
To anchor hole alignment；
（4）, positioning pin will be inserted into the anchor hole between bolt body and drive rod, so that bolt body is connect with drive rod
It is integrated, ultimately forms the fork-shaped anchor pole；
（5）, pallet is set in bolt body, screw on nut and compress pallet, so that pallet is closely crimped with roadway surrounding rock and match
It closes.
Using above-mentioned technical proposal, when the first headtree and the second headtree are brought together into bolt body, the 4th connection
Ear is forced into the long slot bore of sleeve right end lower part, is thus contacted with the first compressed spring top pressure, in the first compressed spring
Under effect, during pushing up drive rod, the first headtree upper left-hand and the second headtree upper right always with anchor
Bar body inner wall top pressure contacts, when the upper end of the first headtree and the second headtree is pulled at two slot holes, the first compression
The upper end of first headtree is passed through the slot hole in left side by the elastic force of spring to the left, and the upper end of the second headtree is passed through right side to the left
Slot hole, the first headtree and the second headtree just continue up and open respectively along slot hole, and the 4th engaging lug is detached from top pressure
First compressed spring of cooperation, the first compressed spring right end is just contacted with casing top pressure, at the slot hole upper end edge of bolt body
Restriction under, even if without will continue to upper left and the right side if the first headtree of effect of the first compressed spring and the second headtree
Upper fork, when the first headtree and the second headtree are in about 45 ° of angle with bolt body, the locating slot on guide rod top
Corresponding up and down with positioning column, under the action of the second compressed spring, positioning column is pressed into locating slot, and guide rod is axial with sleeve
Direction positions, and the first headtree and the second headtree can be made to keep stablizing in this way, even if to the first headtree and the inside coal body
Bifurcated bar generates the stress of all directions, and the first headtree and the second headtree keep stability, can fully enhance in this way
Anchoring effect.
Due to the first headtree and the second headtree pulled respectively in the rotation process of line centered on by axis pin sleeve to
Move left and move right with guide rod, sleeve be moved to the left with guide rod move right it is rectangular have certain radian, in order to avoid
Stress is generated between sleeve and guide rod, and enough gaps are specially set between sleeve and guide rod.
First headtree upper end and the second headtree upper end be the upper end of pointed structures and every hangnail and bifurcated
The outer surface of bar is fixedly connected, and every hangnail is 15 ° with the angle of headtree center line, and above structure can be reduced and be pushed up
The thrust of dynamic drive rod, makes the first headtree upper end and the second headtree be easy to be inserted upwardly into coal body.By tightening spiral shell
Mother applies pretightning force to bolt body, the first headtree and the second headtree.Pass through resin anchoring agent between bolt body and coal body
Realize bond-anchorage effect, the hangnail and resin anchoring agent and coal body reality that the first headtree and the second headtree be arrangeds by surface
Existing mechanical anchor.
In conclusion the fork-shaped Soil Anchor Design of the utility model is reasonable, and it is compact-sized, anchoring area is improved, is increased
Broken top plate coal body anchors range, improves the internal friction angle of breaking surrounding rock, improves intensity behind whole peak, improves broken roof coal
The anchoring effect of body.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of self-locking positioning mechanism in Fig. 1；
Fig. 3 is the right view of Fig. 2.
Specific implementation mode
As shown in Figure 1, Figure 2 and Figure 3, the fork-shaped anchor pole for anchoring breaking roof coal body of the utility model, including anchor
Bar body 1, drive rod 2, the first headtree 3 and the second headtree 4, positioning pin 5, pallet 6 and nut 7, bolt body 1 are hollow
Structure and upper end block lower end opening, and 1 middle part left and right side of bolt body offers one about 1 center of bolt body respectively
The length direction of symmetrical slot hole 8, slot hole 8 is parallel to 1 center line of bolt body, and nut 7 is threaded under bolt body 1
Outer circle, pallet 6 is held to be sleeved on outside 1 lower end of bolt body and on nut 7, drive rod 2 is plugged upwards by 1 lower end of bolt body
In bolt body 1,2 upper end of drive rod is located between two slot holes 8, and 2 lower end of drive rod is flushed with 1 lower end of bolt body, fixed
Position pin 5 is located at 6 top of pallet and is arranged along 1 radial direction of bolt body, and positioning pin 5 passes through bolt body 1 and drive rod 2, drives
2 upper end of lever, 3 lower end of the first headtree and 4 lower end of the second headtree are hinged by an axis pin 9,3 upper end of the first headtree and
Second headtree, 4 upper end is each passed through a slot hole 8 and is obliquely installed upwards, is arranged between the first headtree 3 and the second headtree 4
There is self-locking positioning mechanism 10.
Self-locking positioning mechanism 10 includes horizontally disposed sleeve 11 and guide rod 12, and 3 right side of the first headtree is fixedly installed
First engaging lug 13, the left side of the second headtree 4 are fixedly installed the second engaging lug 14, guide rod 12 be plugged in sleeve 11 and with set
There is gap 15,12 right end of guide rod to stretch out sleeve 11,11 lower left side of sleeve is fixedly installed to be connected with first between 11 inner walls of cylinder
The hinged third engaging lug 16 of lug 13, is fixedly installed on the right side of 12 lower part of guide rod and the second engaging lug 14 is hinged 4th connect
Ear 17 is arranged with the first compression that left and right ends coordinate with third engaging lug 16 and 17 top pressure of the 4th engaging lug respectively on sleeve 11
Spring 18,12 left upper portion of guide rod offer the locating slot 19 of open top, and 11 right end lower part of sleeve offers in the axial direction
Long slot bore 20,17 left side of the 4th engaging lug is extend into long slot bore 20 to be contacted with 18 top pressure of the first compressed spring, 11 right end of sleeve
Top is radially fixedly connected there are one casing 21, and 21 upper end of casing is fixedly connected with closure plate 22, is provided in casing 21
Second compressed spring 23 and the positioning column 24 below the second compressed spring 23,23 top and bottom of the second compressed spring difference
Coordinate with closure plate 22 and 24 top pressure of positioning column, 24 lower end of positioning column is contacted with 12 top top pressure of guide rod.
2 upper end of drive rod offers installation slotted eye 27 in the axial direction, on 3 upper end of the first headtree and the second headtree 4
End is pointed structures 25, and 3 lower end of the first headtree and 4 lower end of the second headtree are flat structure 26, the first headtree 3
It extend into mounting groove after the bending to the left of flat structure 26 of 4 lower end of the bending to the right of flat structure 26 and the second headtree of lower end
It is hinged by the axis pin 9 and 2 upper end of drive rod in hole 27.
Spiral prominence cord 28 is provided with outside bolt body 1 in the axial direction.
The outer surface of first headtree 3 and the second headtree 4 is evenly arranged with several row's hangnail groups 29 along its length, often
Row's hangnail group 29 is uniformly arranged along the circumferencial direction of headtree, and the distance between adjacent two rows hangnail group 29 is 25mm, is often arranged
The length of every hangnail in hangnail group 29 is 10mm, and the distance for often arranging adjacent two hangnails in hangnail group 29 is 5mm, every
The upper end of hangnail is fixedly connected with the outer surface of headtree, and every hangnail is 15 ° with the angle of headtree center line.
The installation method of the fork-shaped anchor pole, includes the following steps,
（1）, using drilling machine after roadway surrounding rock up-hole, drilling via formations, Anchor Agent is injected in drilling；
（2）And then bolt body 1 is inserted into drilling, the power output end of 1 lower end of bolt body and jumbolter connects
It connects, jumbolter drives bolt body 1 to rotate, and bolt body 1 stirs Anchor Agent to solidification and reaches nominal torque；
（3）, the first headtree 3 and the second headtree 4 are closed up after be inserted into jumbolter from bottom to top, first pressure
Under the action of contracting spring 18,3 upper left-hand of the first headtree and 4 upper right of the second headtree respectively with 1 inner wall of bolt body
Top pressure contacts, and pushes up drive rod 2, and 3 upper end of the first headtree and 4 upper end of the second headtree are each passed through the slot hole 8 in left side
It is continued to move up with after the slot hole 8 on right side, under the restriction at the 8 upper end edge of slot hole of bolt body 1,3 He of the first headtree
Second headtree 4 axis centered on axis pin 9,3 upper end of the first headtree and the second headtree 4 are diverged to the left and to the right respectively, with
The sleeve 11 of first headtree 3 connection is moved to the left, and the guide rod 12 being connect with the second headtree 4 moves right, when on guide rod 12
The locating slot 19 in portion expose to the right after sleeve 11 with about 24 positioning column to it is corresponding when under the action of the second compressed spring 23, it is fixed
Position 24 lower part of column is pressed into locating slot 19, to position guide rod 12 and 11 axial direction of sleeve, thus by first point
Fork arm 3 and the second headtree 4 position, and the anchor hole radial with drive rod 2 of bolt body 1 is aligned at this time；
（4）, will in the anchor hole between bolt body 1 and drive rod 2 be inserted into positioning pin 5, make bolt body 1 and drive rod
2 are connected as one, and ultimately form the fork-shaped anchor pole；
（5）, pallet 6 is set in bolt body 1, screw on nut 7 and compress pallet 6, pallet 6 is made closely to be pressed with roadway surrounding rock
Connect cooperation.
When first headtree 3 and the second headtree 4 are brought together into bolt body 1, the 4th engaging lug 17 is forced into sleeve
It in the long slot bore 20 of 11 right end lower parts, is thus contacted with 18 top pressure of the first compressed spring, in the effect of the first compressed spring 18
Under, during pushing up drive rod 2,3 upper left-hand of the first headtree and 4 upper right of the second headtree always with anchor pole
1 inner wall top pressure of ontology contacts, when the upper end of the first headtree 3 and the second headtree 4 is pulled at two slot holes 8, the first pressure
The upper end of first headtree 3 is passed through the slot hole 8 in left side by the elastic force of contracting spring 18 to the left, to the left by the upper end of the second headtree 4
Slot hole 8 across right side, the first headtree 3 and the second headtree 4 are just continued up and are opened respectively along slot hole 8, and the 4th connects
Lug 17 is detached from the first compressed spring 18 of top pressure cooperation, and 18 right end of the first compressed spring is just contacted with 21 top pressure of casing, in anchor
Under the restriction at the 8 upper end edge of slot hole of bar body 1, even if without the effect of the first compressed spring 18, the first headtree 3 and second
Headtree 4 also will continue to diverge to upper left and upper right, until the first headtree 3 and the second headtree 4 are in about with bolt body 1
When 45 ° of angle, the locating slot 19 on 12 top of guide rod is corresponding with about 24 positioning column, under the action of the second compressed spring 23,
Positioning column 24 is pressed into locating slot 19, and guide rod 12 and 11 axial direction of sleeve position, and can make the first headtree 3 and the in this way
Bifurcated bar 4 keeps stablizing, even if the stress of all directions is generated inside coal body to the first headtree 3 and the second headtree 4,
First headtree 3 and the second headtree 4 keep stability, can fully enhance anchoring effect in this way.
First headtree, 3 upper end and 4 upper end of the second headtree be pointed structures 25 and every hangnail upper end with
The outer surface of headtree is fixedly connected, and every hangnail is 15 ° with the angle of headtree center line, above structure can reduce to
The upper thrust for pushing drive rod 2, makes 3 upper end of the first headtree and 4 upper end of the second headtree be easy to be inserted upwardly into coal body.
Pretightning force is applied to bolt body 1, the first headtree 3 and the second headtree 4 by tightening nut 7.Between bolt body 1 and coal body
Bond-anchorage effect is realized by resin anchoring agent, the hangnail and tree that the first headtree 3 and the second headtree 4 are arranged by surface
Fat Anchor Agent and coal body realize mechanical anchor.
The present embodiment not makes any form of restriction the shape of the utility model, material, structure etc., every foundation
The technical essence of the utility model belongs to this reality to any simple modification, equivalent change and modification made by above example
With the protection domain of new technique scheme.
Claims (5)
1. the fork-shaped anchor pole for anchoring breaking roof coal body, it is characterised in that：Including bolt body, drive rod, the first bifurcated
Bar and the second headtree, positioning pin, pallet and nut, bolt body is hollow structure and upper end blocks lower end opening, anchor pole sheet
Left and right side offers one about the symmetrical slot hole in bolt body center respectively in the middle part of body, and the length direction of slot hole is parallel
In bolt body center line, nut thread is connected to bolt body lower end outer circle, and pallet is sleeved on outside bolt body lower end and position
In on nut, drive rod is plugged in bolt body upwards by bolt body lower end, and drive rod upper end is located between two slot holes,
Drive rod lower end is flushed with bolt body lower end, and positioning pin is located above pallet and is arranged along bolt body radial direction, positioning
For pin across bolt body and drive rod, drive rod upper end, the first headtree lower end and the second headtree lower end pass through an axis pin
Hinged, the first headtree upper end and the second headtree upper end are each passed through a slot hole and are obliquely installed upwards, the first headtree and
It is provided with self-locking positioning mechanism between second headtree.
2. the fork-shaped anchor pole according to claim 1 for anchoring breaking roof coal body, it is characterised in that：Lock-bit machine
Structure includes horizontally disposed sleeve and guide rod, and the first engaging lug, the second headtree left side are fixedly installed on the right side of the first headtree
It is fixedly installed the second engaging lug, guide rod is plugged in sleeve and there is gap, guide rod right end to stretch out set between sleeve lining
Cylinder, lower cartridge left side are fixedly installed the third engaging lug hinged with the first engaging lug, are fixedly installed on the right side of guide rod lower part
Fourth engaging lug hinged with the second engaging lug, be arranged on sleeve left and right ends respectively with third engaging lug and the 4th engaging lug
First compressed spring of top pressure cooperation, guide rod left upper portion offer the locating slot of open top, and sleeve right end lower part is along axis
Direction offers long slot bore, extend on the left of the 4th engaging lug in long slot bore and is contacted with the first compressed spring top pressure, sleeve right end
Top is radially fixedly connected there are one casing, and sleeve upper end is fixedly connected with closure plate, the second compression is provided in casing
Spring and the positioning column below the second compressed spring, the second compressed spring top and bottom respectively with closure plate and positioning capital
Press-fit, positioning column lower end are contacted with top pressure at the top of guide rod.
3. the fork-shaped anchor pole according to claim 2 for anchoring breaking roof coal body, it is characterised in that：Drive rod upper end
Installation slotted eye is offered in the axial direction, and the first headtree upper end and the second headtree upper end are pointed structures, the first bifurcated
Bar lower end and the second headtree lower end are flat structure, the flat structure bending to the right of the first headtree lower end and second
It is extend into after the bending to the left of the flat structure of headtree lower end in installation slotted eye hinged by the axis pin and drive rod upper end.
4. the fork-shaped anchor pole according to claim 1 for anchoring breaking roof coal body, it is characterised in that：Outside bolt body
Portion is provided with spiral prominence cord in the axial direction.
5. the fork-shaped anchor pole according to claim 1 for anchoring breaking roof coal body, it is characterised in that：First headtree
It is evenly arranged with several row's hangnail groups along its length with the outer surface of the second headtree, often arranges hangnail group along the circle of headtree
Circumferential direction is uniformly arranged, and the distance between adjacent two rows hangnail group is 25mm, and the length for often arranging every hangnail in hangnail group is
10mm, the distance for often arranging adjacent two hangnails in hangnail group are 5mm, and the upper end of every hangnail is solid with the outer surface of headtree
Fixed connection, every hangnail is 15 ° with the angle of headtree center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720828508.XU CN207829928U (en) | 2017-07-10 | 2017-07-10 | Fork-shaped anchor pole for anchoring breaking roof coal body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720828508.XU CN207829928U (en) | 2017-07-10 | 2017-07-10 | Fork-shaped anchor pole for anchoring breaking roof coal body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207829928U true CN207829928U (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720828508.XU Expired - Fee Related CN207829928U (en) | 2017-07-10 | 2017-07-10 | Fork-shaped anchor pole for anchoring breaking roof coal body |
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| Country | Link |
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| CN (1) | CN207829928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575798A (en) * | 2020-11-10 | 2021-03-30 | 上海绿地建设(集团)有限公司 | Building foundation bearing structure |
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2017
- 2017-07-10 CN CN201720828508.XU patent/CN207829928U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575798A (en) * | 2020-11-10 | 2021-03-30 | 上海绿地建设(集团)有限公司 | Building foundation bearing structure |
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Granted publication date: 20180907 |