CN109057842A - It cuts drawing conversion flexibility and allows pressure shear anchor arm and its construction supporting method - Google Patents
It cuts drawing conversion flexibility and allows pressure shear anchor arm and its construction supporting method Download PDFInfo
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- CN109057842A CN109057842A CN201811099696.2A CN201811099696A CN109057842A CN 109057842 A CN109057842 A CN 109057842A CN 201811099696 A CN201811099696 A CN 201811099696A CN 109057842 A CN109057842 A CN 109057842A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 16
- 238000010276 construction Methods 0.000 title claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 166
- 239000010959 steel Substances 0.000 claims abstract description 166
- 238000010008 shearing Methods 0.000 claims abstract description 33
- 239000002131 composite material Substances 0.000 claims abstract description 26
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 238000005452 bending Methods 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 claims description 40
- 230000000694 effects Effects 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 7
- 239000002360 explosive Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002787 reinforcement Effects 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
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- 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
- E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
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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)
Abstract
The invention discloses one kind cut drawing conversion flexibility allow pressure shear anchor arm, including nut, pallet, antifriction gasket, aligning ball pad, the screw-thread steel body of rod and several segments cut drawing conversion flexibility allow pressure composite structure.The drawing conversion flexibility of cutting allows pressure composite structure to be made of the thread segment and lockset at both ends, the steel strand wires of centre and steel pillar, wherein thread segment, lockset and steel pillar are the steel structures of integrated molding, and the thread segment at the steel structure both ends is connected through a screw thread with the screw-thread steel body of rod respectively；The steel strand wires are located among steel pillar, and steel strand wires are locked by lockset and steel pillar, and steel pillar is connected by the thread segment at both ends with the screw-thread steel body of rod；The steel strand wires are in bending relaxed state.By the body of rod cut drawing conversion flexibility allow pressure composite structure, may be implemented " high pretightening force, flexibility allow pressure, cut drawing convert " function, effectively solve the problems, such as the fault in material of " shearing strength is low, the body of rod is easily cut " existing for existing anchor pole.
Description
Technical field
The invention belongs to mine support engineering shear anchor arm support technology fields, and in particular to one kind is cut drawing conversion flexibility and allowed
Press shear anchor arm and its construction supporting method.
Background technique
The reinforcement effect of anchor pole is mainly reflected in along anchor pole rock deformation axially and tangentially or moving limitation, i.e. anchor pole
The axial drawing-resistant function to rock stratum bulking deformation and the tangential shearing resistance effect to the Rockmass Shear changing of the relative positions can be generated.Currently generally use
Anchor pole be twisted steel anchor rod, either low-intensity twisted steel anchor rod or high-strength deformed steel bar anchor pole, the shearing strength of anchor pole
It is far below its tensile strength, shearing strength is about 0.6 times of tensile strength or so, and what is had is even lower.However, for rock stratum
For, the failure by shear in strata structure face or the failure by shear of rock mass itself are a kind of important forms of formation damage.Therefore,
In mine support engineering, many anchor poles have occurred that shearing fracture before not playing larger drawing-resistant function, and then cause
Suspension roof support failure.Therefore, currently employed anchor pole it is generally existing " tensile strength is high, shearing strength is low, the body of rod easily by
How the technical problems such as cutting ", effectively inhibit the failure by shear of anchor pole and give full play to the drawing-resistant function of anchor pole, become solution and work as
The critical issue of preceding anchor pole material mechanical performance defect.
Summary of the invention
The present invention, which provides one kind and cuts drawing conversion flexibility, allows pressure shear anchor arm and its construction supporting method, it is intended to be turned by cutting to draw
Changing flexibility allows pressure composite structure to convert shear force of the rock stratum to rock stratum to the drawing active force to anchor pole, effectively solves existing
There are the technical problems such as anchor pole existing for anchor pole " tensile strength is high, shearing strength is low, the body of rod is easily cut ", to give full play to
The tensile capacity of anchor pole.
It cuts drawing conversion flexibility in order to solve the above technical problems, the present invention provides one kind and allows pressure shear anchor arm, including anchor pole is attached
Part cuts drawing conversion flexibility and allows pressure composite structure, the first screw-thread steel body of rod and the second screw-thread steel body of rod；Anchor pole attachment is arranged second
The rear end of the screw-thread steel body of rod；
It cuts and draws conversion flexibility that pressure composite structure is allowed to include steel pillar and the steel strand wires that are arranged in steel pillar, steel pillar
Rear and front end inner wall is provided with internal thread segment, outside the front end of the rear end outer circle of the first screw-thread steel body of rod and the second screw-thread steel body of rod
Circle is provided with external thread section, and the external thread section of the first screw-thread steel body of rod rear end protrudes into and is threadedly coupled to steel pillar front end
The external thread section of internal thread segment, the second screw-thread steel lever front end protrudes into and is threadedly coupled to the internal thread segment of steel pillar rear end；
Steel pillar rear and front end inner wall is fixedly installed a lockset respectively, and the both ends of steel strand wires pass through lockset and steel pillar
Locking, steel strand wires are in bending relaxed state.
Internal thread segment and the threaded connection length of external thread section should be greater than 40mm, to guarantee the first screw-thread steel body of rod, second
Junction between the screw-thread steel body of rod and steel pillar has enough bearing capacitys.
The length that steel strand wires penetrate lockset should be greater than 50mm, can be locked and be stayed by lockset when guaranteeing steel strand wires tensioning
There is excess length；Lockset includes anchor ring and locking plate, and anchor ring and steel pillar integrated molding, the inner hole of anchor ring are tied in cone
Structure, locking plate are provided with three pieces, and three pieces locking plate is located in the inner hole of anchor ring, and the shape of three pieces locking plate and the inner hole of anchor ring are in circular cone
The inner hole of shape structure, three pieces locking plate is cylinder, and steel strand wires are threaded through in the inner hole of three pieces locking plate；Steel strand wires are stretched in tensioning
Length is 20~30mm, this spread length can need to be adjusted according to construction production.
Anchor pole attachment includes nut, pallet, antifriction gasket and the spherical ball for being set in the second screw-thread steel body of rod rear end
Pad, protrusion forms bowl structure backward at pallet middle part, offers and is set on the second screw-thread steel body of rod at the center of bowl structure
The edge of perforation is arranged in perforation, aligning ball pad, and nut passes through antifriction gasket and aligning ball pad press fit.
Cut draw conversion flexibility allow pressure composite structure, the position of the first screw-thread steel body of rod and the second screw-thread steel body of rod and number by
Anchor pole is easy to happen the position of shearing fracture in rock stratum and number determines.
The construction supporting method for drawing conversion flexibility to allow pressure shear anchor arm is cut, construction procedure is as follows:
(1) according to the stress condition of the anchor pole country rock reinforced and the strata structure of shearing changing of the relative positions rock stratum, bulking deformation rock stratum
Condition determines nut, pallet, antifriction gasket, aligning ball pad, the first screw-thread steel body of rod, the second screw-thread steel body of rod and cuts drawing turn
Change the flexible design parameter for allowing and pressing composite structure, and is produced and processed by design parameter；
(2) by the first screw-thread steel body of rod, the second screw-thread steel body of rod and cut drawing conversion flexibility allow pressure composite structure according to design tie
Structure assembles；When assembling, it should will cut drawing conversion flexibility and pressure composite structure is allowed to be placed in shearing changing of the relative positions rock stratum section；
(3 set square according to the position of square, array pitch and angle, using jumbolter, and square diameter should be greater than
The one screw-thread steel body of rod and second screw-thread steel 10~12mm of shank diameter, and be greater than to cut and flexible allow of conversion is drawn to press composite structure most
4~6mm of big outer diameter；
(4) after square is set, resin explosive roll is sent by square bottom using the first screw-thread steel lever front end, and using brill
Machine cooperates blender to drive the first screw-thread steel body of rod agitating resin powder stick, after resin explosive roll solidification, successively installs pallet, aligning
Ball pad, antifriction gasket and nut, and apply prefastening torque using the more nuts of drilling machine, and then complete rockbolt installation.
In Bracing Process, steel pillar tensioning pretightning force with higher is made by drilling machine tightening nut, while
Under the Rockmass Shear effect for shearing changing of the relative positions rock stratum section, steel pillar can provide higher shear resistance, and when steel pillar is sent out
After raw shearing fracture, the steel strand wires in relaxed state among steel pillar take place bending and stretch and extend, to rock
The shear force of layer, which plays the role of flexibility, allows pressure；When steel strand wires are tensioned under the shear action of rock stratum, steel strand wires are to rock
Layer plays axial drawing-resistant function, that is, converting tangential shearing resistance effect for axial drawing-resistant function.
In Bracing Process, used nut is to thicken nut, and used pallet is arch tray, used to subtract
The gasket that rubs can reduce frictional dissipation when installation torque is converted into pretightning force, and used aligning ball pad makes its own and pallet
It closely knit can be contacted with nut, avoid localized contact from generating stress and concentrate and anchor pole tail portion is caused to be broken.
By adopting the above technical scheme, steel pillar has certain tensile strength and shearing strength, leads in rockbolt installation
Tightening nut is crossed, steel pillar can provide higher tensioning pretightning force；When the shearing changing of the relative positions occurs for the rock stratum of suspension roof support, institute
Steel pillar can provide higher shear resistance.
Nut is to thicken nut, and pallet is arch tray, when antifriction gasket can reduce installation torque and be converted into pretightning force
Frictional dissipation, aligning ball pad can guarantee its own with pallet and nut are closely knit contacts, avoid localized contact from generating stress collection
In and cause anchor pole tail portion be broken.
The invention has the following advantages: the present invention is by between the first screw-thread steel body of rod and the second screw-thread steel body of rod
Increase cuts drawing conversion flexibility and allows pressure composite structure, and can effectively solving anchor pole existing for existing anchor pole, " tensile strength is high, shearing resistance is strong
The low, body of rod is spent easily to be cut " etc. technical problems, embody in the following areas: first, the steel pillar of the structure has one
Fixed tensile strength and shearing strength, can apply larger pretightning force in rockbolt installation, and provide higher tensile capacity and
Shear resistance；Second, after the shear force of rock stratum is more than the shearing strength of steel pillar and is broken, in steel pillar
The intermediate steel strand wires in relaxed state take place bending and stretch and extend, therefore relaxation steel strand wires can cut rock stratum
Flexibility is played the role of in the effect of cutting allows pressure；Third, when steel strand wires are tensioned under Rockmass Shear effect, steel strand wires start to rock stratum
Axial drawing-resistant function is played, that is, converting tangential shearing resistance effect for axial drawing-resistant function.In short, cutting drawing by increasing
Conversion flexibility allow pressure composite structure, may be implemented anchor pole " high pretightening force, flexibility allow pressure, cut drawing conversion " function, effectively solution
The fault in material problem of " shearing strength is low, the body of rod is easily cut " existing for existing anchor pole, and to give full play to the anti-of anchor pole
Drawing ability provides safeguard.
Detailed description of the invention
Fig. 1 be the present invention cut drawing conversion flexibility allow pressure shear anchor arm anchor structure cross-section diagram；
Fig. 2 be the present invention cut drawing conversion flexibility allow pressure composite structure sectional view；
Fig. 3 is the perspective view of the lock structure of steel strand wires of the present invention；
Fig. 4 is the top view of Fig. 3.
In Fig. 1-4: 1 is nut, and 2 be pallet, and 3 be antifriction gasket, and 4 be aligning ball pad, and 5 be the first screw-thread steel body of rod, and 6 are
It cuts drawing conversion flexibility and allows pressure composite structure, 7 be internal thread segment, and 8 be lockset, and 9 be steel strand wires, and 10 be steel pillar, and 11 be anchor ring,
12 be locking plate, and 13 be shearing changing of the relative positions rock stratum, and 14 be bulking deformation rock stratum, and 15 be square, and 16 be resin explosive roll, and 17 be the second spiral shell
Line steel pole body.
Specific embodiment
As Figure 1-Figure 4, of the invention drawing conversion flexibility of cutting allows pressure shear anchor arm, including anchor pole attachment, cuts drawing conversion
Flexibility, which allows, presses composite structure 6, the first screw-thread steel body of rod 5 and the second screw-thread steel body of rod 17；Anchor pole attachment is arranged in the second screw-thread steel
The rear end of the body of rod 17；
It cuts and draws conversion flexibility that pressure composite structure 6 is allowed to include steel pillar 10 and the steel strand wires 9 being arranged in steel pillar 10, steel
The rear and front end inner wall of pillar 10 is provided with internal thread segment 7, the rear end outer circle of the first screw-thread steel body of rod 5 and the second screw thread steel pole
The front end outer circle of body 17 is provided with external thread section, and the external thread section of the first screw-thread steel body of rod, 5 rear end is protruded into and is threadedly coupled to
The external thread section of the internal thread segment 7 of 10 front end of steel pillar, the second screw-thread steel body of rod, 17 front end protrudes into and is threadedly coupled to steel
The internal thread segment 7 of 10 rear end of pillar；
10 rear and front end inner wall of steel pillar is fixedly installed a lockset 8 respectively, and the both ends of steel strand wires 9 pass through lockset 8 and steel
Pillar 10 processed is locked, and steel strand wires 9 are in bending relaxed state.
Internal thread segment 7 and the threaded connection length of external thread section should be greater than 40mm, to guarantee the first screw-thread steel body of rod 5, the
Junction between the two screw-thread steel bodies of rod 17 and steel pillar 10 has enough bearing capacitys.
The length that steel strand wires 9 penetrate lockset 8 should be greater than 50mm, can be locked by lockset 8 when guaranteeing that steel strand wires 9 are tensioned
And there are excess lengths；Lockset 8 include anchor ring 11 and locking plate 12,10 integrated molding of anchor ring 11 and steel pillar, anchor ring 11
Inner hole is in conical structure, and locking plate 12 is provided with three pieces, and three pieces locking plate 12 is located in the inner hole of anchor ring 11, outside three pieces locking plate 12
The inner hole of shape and anchor ring 11 is in conical structure, and the inner hole of three pieces locking plate 12 is cylinder, and steel strand wires 9 are threaded through three pieces locking plate
In 12 inner hole；Steel strand wires 9 tensioning when spread length be 20~30mm, this spread length can according to construction production need into
Row adjustment.
Anchor pole attachment includes the nut 1 for being set in the second screw-thread steel body of rod, 17 rear end, pallet 2, antifriction gasket 3 and adjusts
Bulbus cordis pad 4, protrusion forms bowl structure backward at pallet 2 middle part, offers at the center of bowl structure and is set to the second screw thread steel pole
The edge of perforation is arranged in perforation on body 17, aligning ball pad 4, and nut 1, which is crimped by antifriction gasket 3 with aligning ball pad 4, matches
It closes.
It cuts and draws flexible position and the number for pressing composite structure 6, the first screw-thread steel body of rod 5 and the second screw-thread steel body of rod 17 that allow of conversion
Mesh is easy to happen the position of shearing fracture by anchor pole in rock stratum and number determines.
Of the invention cuts the construction supporting method for drawing conversion flexibility to allow pressure shear anchor arm, and construction procedure is as follows:
(1) according to the stress condition of the anchor pole country rock reinforced and the rock stratum of shearing changing of the relative positions rock stratum 13, bulking deformation rock stratum 14
Structural condition determines nut 1, pallet 2, antifriction gasket 3, aligning ball pad 4, the first screw-thread steel body of rod 5, the second screw-thread steel body of rod 17
And the design parameter for drawing conversion flexibility to allow pressure composite structure 6 is cut, and produced and processed by design parameter；
(2) it by the first screw-thread steel body of rod 5, the second screw-thread steel body of rod 17 and cuts drawing conversion flexibility and allows pressure composite structure 6 according to setting
Meter structure assembles；When assembling, it should will cut drawing conversion flexibility and pressure composite structure 6 is allowed to be placed in 13 sections of changing of the relative positions rock stratum of shearing；
(3 set square 15 according to the position of square 15, array pitch and angle, using jumbolter, and 15 diameter of square is answered
Greater than 17 10~12mm of diameter of the first screw-thread steel body of rod 5 and the second screw-thread steel body of rod, and it is greater than and cuts drawing conversion flexibility and allow pressure group
Close 4~6mm of maximum outside diameter of structure 6；
(4) after square 15 is set, resin explosive roll 16 is sent by 15 bottom of square using the first screw-thread steel body of rod, 5 front end,
And the first screw-thread steel body of rod, 5 agitating resin powder stick 16 is driven using drilling machine cooperation blender, after the solidification of resin explosive roll 16, successively
Pallet 2, aligning ball pad 4, antifriction gasket 3 and nut 1 are installed, and prefastening torque is applied using drilling machine tightening nut 1, and then complete
Rockbolt installation.
In Bracing Process, the tensioning pretightning force with higher of steel pillar 10 is made by drilling machine tightening nut 1, simultaneously
Under the Rockmass Shear effect of shearing changing of the relative positions rock stratum section 13, steel pillar 10 can provide higher shear resistance, and work as steel
After shearing fracture occurs for pillar 10, bending and drawing takes place in the steel strand wires 9 in relaxed state among steel pillar 10
Extension exhibition plays the role of flexibility to the shear force of rock stratum and allows pressure；When steel strand wires 9 are tensioned under the shear action of rock stratum
When, steel strand wires 9 play axial drawing-resistant function to rock stratum, that is, converting tangential shearing resistance effect for axial drawing-resistant function.
In Bracing Process, used nut 1 is to thicken nut, and used pallet 2 is arch tray, used
Antifriction gasket 3 can reduce frictional dissipation when installation torque is converted into pretightning force, used aligning ball pad 4 make its own with
Pallet 2 and nut 1 closely knit can contact, and avoid localized contact from generating stress and concentrate and anchor pole tail portion is caused to be broken.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (8)
- Shear anchor arm is pressed 1. cutting drawing conversion flexibility and allowing, it is characterised in that: including anchor pole attachment, is cut and is drawn conversion flexibility that pressure combination is allowed to tie Structure, the first screw-thread steel body of rod and the second screw-thread steel body of rod；The rear end of the second screw-thread steel body of rod is arranged in anchor pole attachment；It cuts and draws conversion flexibility that pressure composite structure is allowed to include steel pillar and the steel strand wires that are arranged in steel pillar, steel pillar Rear and front end inner wall is provided with internal thread segment, outside the front end of the rear end outer circle of the first screw-thread steel body of rod and the second screw-thread steel body of rod Circle is provided with external thread section, and the external thread section of the first screw-thread steel body of rod rear end protrudes into and is threadedly coupled to steel pillar front end The external thread section of internal thread segment, the second screw-thread steel lever front end protrudes into and is threadedly coupled to the internal thread segment of steel pillar rear end；Steel pillar rear and front end inner wall is fixedly installed a lockset respectively, and the both ends of steel strand wires pass through lockset and steel pillar Locking, steel strand wires are in bending relaxed state.
- Shear anchor arm is pressed 2. cutting drawing conversion flexibility as described in claim 1 and allowing, it is characterised in that: internal thread segment and external thread section Threaded connection length should be greater than 40mm, to guarantee between the first screw-thread steel body of rod, the second screw-thread steel body of rod and steel pillar Junction has enough bearing capacitys.
- Shear anchor arm is pressed 3. cutting drawing conversion flexibility as claimed in claim 2 and allowing, it is characterised in that: steel strand wires penetrate the length of lockset Degree should be greater than 50mm, can be locked by lockset when guaranteeing steel strand wires tensioning and there are excess lengths；Lockset include anchor ring and The inner hole of locking plate, anchor ring and steel pillar integrated molding, anchor ring is in conical structure, and locking plate is provided with three pieces, three pieces locking plate In the inner hole of anchor ring, the shape of three pieces locking plate and the inner hole of anchor ring are in conical structure, and the inner hole of three pieces locking plate is circle Cylindricality, steel strand wires are threaded through in the inner hole of three pieces locking plate；Steel strand wires spread length in tensioning is 20~30mm, this spread length It can need to be adjusted according to construction production.
- Shear anchor arm is pressed 4. cutting drawing conversion flexibility as claimed in claim 3 and allowing, it is characterised in that: anchor pole attachment includes being arranged Nut, pallet, antifriction gasket and aligning ball pad in the second screw-thread steel body of rod rear end, in the middle part of pallet backward protrusion formed it is bowl-shape Structure offers the perforation being set on the second screw-thread steel body of rod at the center of bowl structure, and the side of perforation is arranged in aligning ball pad At edge, nut passes through antifriction gasket and aligning ball pad press fit.
- 5. cutting drawing conversion flexibility as claimed in claim 4 allows pressure shear anchor arm, it is characterised in that: cut drawing conversion flexibility and allow pressure group It is broken that the position and number for closing structure, the first screw-thread steel body of rod and the second screw-thread steel body of rod are easy to happen shearing by anchor pole in rock stratum Disconnected position and number determine.
- 6. cutting the construction supporting method for drawing conversion flexibility to allow pressure shear anchor arm as claimed in claim 5, which is characterized in that it is applied Steps are as follows for work:(1) according to the stress condition of the anchor pole country rock reinforced and the strata structure of shearing changing of the relative positions rock stratum, bulking deformation rock stratum Condition determines nut, pallet, antifriction gasket, aligning ball pad, the first screw-thread steel body of rod, the second screw-thread steel body of rod and cuts drawing turn Change the flexible design parameter for allowing and pressing composite structure, and is produced and processed by design parameter；(2) by the first screw-thread steel body of rod, the second screw-thread steel body of rod and cut drawing conversion flexibility allow pressure composite structure according to design tie Structure assembles；When assembling, it should will cut drawing conversion flexibility and pressure composite structure is allowed to be placed in shearing changing of the relative positions rock stratum section；(3 set square according to the position of square, array pitch and angle, using jumbolter, and square diameter should be greater than The one screw-thread steel body of rod and second screw-thread steel 10~12mm of shank diameter, and be greater than to cut and flexible allow of conversion is drawn to press composite structure most 4~6mm of big outer diameter；(4) after square is set, resin explosive roll is sent by square bottom using the first screw-thread steel lever front end, and using brill Machine cooperates blender to drive the first screw-thread steel body of rod agitating resin powder stick, after resin explosive roll solidification, successively installs pallet, aligning Ball pad, antifriction gasket and nut, and apply prefastening torque using the more nuts of drilling machine, and then complete rockbolt installation.
- 7. cutting the construction supporting method for drawing conversion flexibility to allow pressure shear anchor arm as claimed in claim 6, it is characterised in that: propping up During shield, steel pillar tensioning pretightning force with higher is made by drilling machine tightening nut, while in shearing changing of the relative positions rock stratum Under the Rockmass Shear effect of section, steel pillar can provide higher shear resistance, and after shearing fracture occurs for steel pillar, The steel strand wires in relaxed state among steel pillar take place bending and stretch and extend, to the shear force of rock stratum Play the role of flexibility and allows pressure；When steel strand wires are tensioned under the shear action of rock stratum, steel strand wires play axial tension to rock stratum Effect, that is, converting tangential shearing resistance effect for axial drawing-resistant function.
- 8. cutting the construction supporting method for drawing conversion flexibility to allow pressure shear anchor arm as claimed in claim 6, it is characterised in that: propping up During shield, used nut is to thicken nut, and used pallet is arch tray, and used antifriction gasket can subtract Frictional dissipation when torque is converted into pretightning force is installed less, used aligning ball pad keeps its own close with pallet and nut Real contact avoids localized contact from generating stress and concentrates and anchor pole tail portion is caused to be broken.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099696.2A CN109057842B (en) | 2018-09-20 | 2018-09-20 | Shearing-pulling conversion flexible yielding shearing-resistant anchor rod and construction supporting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099696.2A CN109057842B (en) | 2018-09-20 | 2018-09-20 | Shearing-pulling conversion flexible yielding shearing-resistant anchor rod and construction supporting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109057842A true CN109057842A (en) | 2018-12-21 |
| CN109057842B CN109057842B (en) | 2024-01-26 |
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| CN201811099696.2A Active CN109057842B (en) | 2018-09-20 | 2018-09-20 | Shearing-pulling conversion flexible yielding shearing-resistant anchor rod and construction supporting method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883779A (en) * | 2019-01-21 | 2019-06-14 | 绍兴文理学院 | Anchor structure face dimensional effect shearing test design method |
| CN111577339A (en) * | 2020-04-21 | 2020-08-25 | 中国建筑股份有限公司 | High-ground-stress soft rock tunnel supporting structure system and construction method thereof |
| CN113026739A (en) * | 2021-04-16 | 2021-06-25 | 中国矿业大学 | Self-adaptive friction type anti-shearing large-deformation anchor rod |
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| CN113026739B (en) * | 2021-04-16 | 2022-01-18 | 中国矿业大学 | Self-adaptive friction type anti-shearing large-deformation anchor rod |
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