CN109488355A - A kind of construction method of flexible roof bolt - Google Patents
A kind of construction method of flexible roof bolt Download PDFInfo
- Publication number
- CN109488355A CN109488355A CN201910073740.0A CN201910073740A CN109488355A CN 109488355 A CN109488355 A CN 109488355A CN 201910073740 A CN201910073740 A CN 201910073740A CN 109488355 A CN109488355 A CN 109488355A
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- Prior art keywords
- rod
- flexible
- torsion
- pallet
- protrusion
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- 238000010276 construction Methods 0.000 title claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 15
- 238000009412 basement excavation Methods 0.000 claims abstract description 14
- 238000007711 solidification Methods 0.000 claims abstract description 3
- 230000008023 solidification Effects 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 241000195940 Bryophyta Species 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 235000011929 mousse Nutrition 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000002459 sustained effect 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
- E21D21/006—Anchoring-bolts made of cables or wires
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0086—Bearing plates
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of construction methods of flexible roof bolt, are suitable for colliery tunnel support engineering field.The construction ladder bolthole first in rock mass；The flexible anchor body of rod is withstood into Anchor Agent push-in anchor pole stepped hole bottom hole, rotation determines torque nut and then the first rotation of the flexible anchor body of rod and anti-torsion spherical ball is driven to promote, until the flange of position-limiting drum, which fits closely, waits Anchor Agent solidification after jumbolter stops rotating after facing excavation face；Drive determine torque nut rotate and destroy determine torque nut determine torque structure, make to determine torque nut to continue to screw in and compress antifriction washer, anti-torsion aligning bulb, pallet along connector sleeve, so that the stop column on pallet snaps into excavation face prevention pallet rotation.It effectively prevent anti-torsion spherical ball head to rotate, the anti-rotation turned round aligning bulb and limit the rotation limitation flexible anchor body of rod of connector sleeve by protrusion II, so that the flexible anchor body of rod does not rotate when jumbolter applies pretightning force.Its speed of application block, support efficiency are high.
Description
Technical field
The present invention relates to a kind of construction method of flexible roof bolt, it is particularly suitable for what colliery tunnel support engineering field used
A kind of construction method of flexible roof bolt.
Background technique
Present China's coal-mine tunnel generally uses bolt support technology, originally rock gangway more stable in country rock at first
Middle use, later by improving the stiffness and strength of anchor pole material, so that bolt support technology can adapt to soft and broken surrounding rocks
The tunnel of the various mal-conditions such as tunnel, mining influence tunnel.It is default that suspension roof support mainly squeezes into roadway surrounding rock using anchor pole
Drilling in, the country rock body that superficial part is crushed is combined with deep rock mass stability, reaches and controls roadway deformation and realization
The stable purpose of tunnel safety.
The type of existing anchor pole is also numerous.With the complexity of tunnel condition, small-bore resin anchoring prestressed anchor
Rope, which is also developed, to be applied to the diversity of colliery scene anchor shaft anchor cable form and just adapts to the field condition of China's coal-mine complexity.So
And due to the limitation of head-room so that rock-bolt length can be only sustained at 2m or so, anchor rod anchored area's thickness also can only 2m,
It is not suitable with current tunnel complex geological condition, and existing anchor pole application method can not meet the requirement of existing geological environment.
Although and common anchor cable long enough, anchor cable installation procedure are relative complex, and the later period is needed to carry out tensioning with the pump housing again, system
The about driving speed of coal road, meanwhile, anchor cable length is longer, the pretightning force needed is bigger, and scene can not apply sufficiently large
Pretightning force, limited pretightning force can not effectively reinforce anchorage cable anchoring area, and roadway deformation cannot be controlled preferably
System.
Summary of the invention
Technical problem: shortcoming in view of the above technology, providing one kind can satisfy Complicated Geologic Condition, and installation is fast
Speed, the construction method of the high flexible roof bolt of support efficiency.
Technical solution: to realize the above-mentioned technical purpose, a kind of construction method of flexible roof bolt of the invention, the flexibility used
Anchor pole includes the flexible anchor body of rod, pallet, determines torque nut, antifriction washer and anti-torsion aligning bulb, and wherein pallet is arranged soft
Property anchor bar body tail portion, determine torque nut fixed tray, pallet and determine to be equipped with antifriction washer and anti-torsion aligning between torque nut
Bulb；
The flexible anchor body of rod includes steel strand wires, and steel strand wires tail end is arranged in connector sleeve, and the connector sleeve includes tail end
And head end, changeover portion between tail end and head end are equipped with the boss of ring structure, boss is equipped with position-limiting drum, and boss is towards head end
Face be perpendicular end surface, boss is tapered surface towards the face of tail end, has screw thread on the external cylindrical surface of tail end, tail end is provided with symmetrically
The rectangular channel of arrangement being axially arranged along connector sleeve, head end are equipped with the interior cylindrical hole connecting with steel strand wires, the steel strand wires insertion
In the cylindrical hole of connector sleeve, interior cylindrical hole bottom hole is equipped with annular groove, is provided between steel strand wires and cylindrical hole and increases mousse spring, passes through
The mode for being press-connected set head end external cylindrical surface realizes fastening between steel strand wires and connector sleeve；
The position-limiting drum includes position-limiting drum conical shell, and position-limiting drum conical shell includes small one and large one two openings, limit
Big opening on cylinder conical shell is equipped with flange, small opening is equipped with annular bayonet, and the internal diameter of annular bayonet is less than boss
0.5~2mm of outer diameter, position-limiting drum are inserted in by connector sleeve tail end, annular bayonet deform and cross boss tapered end face be stuck in it is convex
In the perpendicular end surface of platform, position-limiting drum is hard plastic material composition；
The pallet includes tray body and stop column, and tray body is that circular turn-up portion and arch form by shape, arch
Center be equipped with bellmouth, the big end of bellmouth and is provided with circumferentially towards the top of arch on the tapered surface of bellmouth
The multiple tracks groove of even distribution, the number of groove are 4~8, and stop column is fixed by welding or interference connection with turn-up portion；
The anti-torsion aligning bulb includes cambered surface and plane, and wherein cambered surface includes multiple tapered surfaces, every two tapered surface
Between be equipped with protrusion I together, the radius of tapered surface is identical with the radius of the bellmouth, and the width and height of protrusion I are less than ditch
The quantity of slot, protrusion I is identical as the quantity of groove, and when flexible roof bolt pre-tightens, protrusion I, which is embedded in groove, ensures anti-torsion bulb and support
Circumferencial direction between disk is fixed, and circular hole is arranged in anti-torsion aligning bulb center, and the protrusion II that setting opposite side is distributed in circular hole is convex
II rectangular cross-section structure is played, raised II width 0.5~1mm small compared with the width of rectangular channel, the height of protrusion II is compared with rectangular channel
The small 0.5~1mm of width, protrusion II be embedded in rectangular channel in limitation the flexible anchor body of rod torsion；
The specific steps of which are as follows:
Step a, the construction ladder bolthole in rock mass, wherein the ladder bolthole close to excavation face is big hole section, remaining
Ladder bolthole be aperture section, the diameter of big hole section is greater than head end 4~10mm of diameter after extruding, and the depth of big hole section meets
The flange of position-limiting drum fits closely excavation face after flexible anchor body of rod insertion bolthole；
Step b, Anchor Agent is put into anchor pole stepped hole, the flexible anchor body of rod is withstood into Anchor Agent, utilizes the flexible anchor body of rod
Front by Anchor Agent be pushed into anchor pole stepped hole bottom hole, using jumbolter rotation determine torque nut so that drive the flexible anchor body of rod with
Anti- torsion spherical ball first rotation, promotes flexible roof bolt to stir evenly Anchor Agent while rotation by jumbolter, rotate,
It promotes, until the flange of position-limiting drum fits closely jumbolter after facing excavation face and stops rotating, it is solidifying to stop 30 seconds waiting Anchor Agents
Gu；
Step c: starting jumbolter drive determine torque nut rotate and destroy determine torque nut determine torque structure, make calmly
Torque nut continues to screw in and compress antifriction washer, anti-torsion aligning bulb, pallet along connector sleeve, so that the stop column on pallet
Snapping into excavation face prevents pallet from rotating, and the protrusion I on aligning bulb is blocked with the groove on pallet at this time, and then prevents anti-torsion from adjusting
Bulbus cordis head rotates, the anti-rotation turned round aligning bulb and limit the rotation limitation flexible anchor body of rod of connector sleeve by protrusion II
Turn, so that the flexible anchor body of rod does not rotate when jumbolter applies pretightning force, pretightning force is 60~100kN.
Step d: jumbolter of backing off repeats step a~c and constructs next flexible roof bolt.
The utility model has the advantages that by adopting the above-described technical solution, the invention has the following advantages over the prior art:
(1) anchor bar body used can be bent, and solve the problems, such as that rock-bolt length is limited by head-room, as coal is opened
Beginning depth is continuously increased, and needs to construct thick-layer anchoring rock beam, high-intensitive long anchor pole is needed just to can control the deformation in tunnel, flexible
Anchor pole Breaking load and length are all 2 times higher than common bolt, are adapted to complicated Minepit environment；
(2) the flexible roof bolt body of rod is made to link together with connector sleeve by being press-connected mode, two parts junction intensity
It can achieve 95% or more of lever strength, can satisfy the requirement of live complex environment；
(3) using torque nut preload installation flexible roof bolt is determined, than the lockset tensioning installation side of existing common steel strand wires
Formula installation speed is more efficient, greatly improves suspension roof support speed, and then improve the fltting speed in tunnel；
(4) installation site of anchor pole, even if anchor pole hole depth is excessive, benefit can be accurately positioned using position-limiting drum in flexible roof bolt
It is constrained on the outside of rock mass with position-limiting drum, also ensures that the installation length of flexible roof bolt connector sleeve, not will lead to flexible roof bolt failure,
Unified anchor pole protruded length is helped to ensure that simultaneously, realizes the quality standardization of mine bolt supporting；
(5) it is mutually fastened using pallet, aligning bulb and connector sleeve using groove and boss and solves jumbolter preload
When flexible roof bolt follow nut rotate thorny problem, in addition the effect of antifriction washer, applies flexible roof bolt larger
Pretightning force, realize bigger bolt pretension, preferably constrain the deformation in tunnel.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the flexible anchor body of rod of the present invention.
Fig. 2 is the enlarged partial sectional view of the flexible anchor body of rod of the present invention.
Fig. 3 is the connector sleeve cross-sectional view of the flexible anchor body of rod of the present invention.
Fig. 4 is the connector sleeve appearance schematic diagram of the flexible anchor body of rod of the present invention.
Fig. 5 is the cross-sectional view of position-limiting drum of the present invention.
Fig. 6 is the schematic diagram of the non-Pre strained state of flexible roof bolt of the present invention.
Fig. 7 is the pre- next cross-sectional view of flexible roof bolt of the present invention.
Fig. 8 is the bolthole schematic diagram of rock mass construction of the present invention.
Fig. 9 is the schematic diagram of pallet of the present invention.
Figure 10 is the anti-schematic diagram for turning round aligning bulb of the present invention.
Figure 11 is the schematic diagram that the present invention determines torque nut.
In figure: A, rock mass；A1, rock mass free face；A2, big hole section；A3 aperture section；B, the flexible anchor body of rod；B1, steel strand wires,
B2, increasing mousse spring, B3, position-limiting drum, B3a, flange, B3b, annular bayonet, B3c, position-limiting drum conical shell, B4, connector sleeve, B4a,
Tail end, B4b, head end, B4c, cylindrical hole, B4d, annular groove, B4e, boss, B4f, rectangular channel, C, pallet, C1, tray body, C1a,
Bellmouth, C1b, turn-up portion, C1c, arch, C1d, groove, C2, stop column；D, determine torque nut；D1, nut body, D2, fixed torsion
Square baffle, E, antifriction washer, F, anti-torsion aligning bulb, F1, tapered surface, F2, I, F3 of protrusion, protrusion II, F4, circular hole.
Specific embodiment
Specific embodiments of the present invention are further described with reference to the accompanying drawing:
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of flexible roof bolt of the invention, it include flexible anchor body of rod B, pallet C,
Determine torque nut D, antifriction washer E and anti-torsion aligning bulb F, wherein pallet C is arranged in the tail portion flexible anchor body of rod B, determines torque
Nut D fixed tray C, pallet C and determine between torque nut D be equipped with antifriction washer E and anti-torsion aligning bulb F；
The flexible anchor body of rod B includes steel strand wires B1, and steel strand wires B1 tail end is arranged in connector sleeve B4, the connector sleeve B4
Including tail end B4a and head end B4b, the changeover portion between tail end B4a and head end B4b is equipped with the boss B4e of ring structure, boss
B4e is equipped with position-limiting drum B3, and boss B4e is perpendicular end surface towards the face of head end B4b, and boss B4e is to bore towards the face of tail end B4a
There is screw thread in shape face on the external cylindrical surface of tail end B4a, and tail end B4a is provided with the square being axially arranged along connector sleeve B4 being arranged symmetrically
Shape slot B4f, head end B4b are equipped with the interior cylindrical hole B4c connecting with steel strand wires B1, and interior cylindrical hole B4c inner wall is equipped with screw thread, bottom hole is set
There are annular groove B4d, the steel strand wires B1 to be inserted into the cylindrical hole B4c of connector sleeve B4, be arranged between steel strand wires B1 and cylindrical hole B4c
Increase mousse spring B2, is realized between steel strand wires B1 and connector sleeve B4 by way of being press-connected set B4 head end B4b external cylindrical surface
Fastening.
As shown in figure 5, the position-limiting drum B3 includes position-limiting drum conical shell B3c, position-limiting drum conical shell B3c includes one big
One small two openings, the big opening on position-limiting drum conical shell B3c is equipped with flange B3a, small opening is equipped with annular bayonet
The internal diameter of B3b, annular bayonet B3b are less than 0.5~2mm of outer diameter of boss B4e, and position-limiting drum B3 is inserted in by connector sleeve B4 tail end B4a,
Annular bayonet B3b is deformed and is crossed the tapered end face of boss B4e and is stuck in the perpendicular end surface of boss B4e, and position-limiting drum B3 is hard
Plastic material is constituted.
As shown in figure 9, the pallet C includes tray body C1 and stop column C2, tray body C1 is circular flange by shape
Portion C1b and arch C1c composition, the center of arch C1c are equipped with bellmouth C1a, and the big end of bellmouth C1a is towards the top of arch C1c
End, and circumferentially equally distributed multiple tracks groove C1d is provided on the tapered surface of bellmouth C1c, the number of groove C1d is 4~8
A, stop column C2 is fixed by welding or interference connection with turn-up portion C1b.
As shown in Figure 10, the anti-torsion aligning bulb F includes cambered surface and plane, and wherein cambered surface includes multiple tapered surfaces
I F2 of protrusion together is equipped between F1, every two tapered surface F1, the radius of tapered surface F1 is identical as the radius of the bellmouth C1a,
The width and height of I F2 of protrusion is less than groove C1d, and the quantity of I F2 of protrusion is identical as the quantity of groove C1d, and flexible roof bolt pre-tightens
When, I F2 of protrusion insertion groove C1d ensures that the circumferencial direction between anti-torsion bulb F and pallet C is fixed, anti-torsion aligning bulb F
Circular hole F4, II F3 of protrusion that setting opposite side is distributed in circular hole, the rectangular cross-section structure of II F3 of protrusion, II F3 of protrusion is arranged in center
Width small 0.5~1mm of the height of width small 0.5~1mm of the width compared with rectangular channel B4f, II F3 of protrusion compared with rectangular channel B4f, it is convex
Play limitation flexible anchor body of rod B torsion in II F3 insertion rectangular channel B4f.
It is as shown in figure 11, described that determine torque nut D include nut body D1 and determining torque baffle D2
As shown in Figure 6 and Figure 7, a kind of construction method of flexible roof bolt, its step are as follows:
Step a, the construction ladder bolthole in rock mass A, wherein the ladder bolthole close to excavation face A1 is big hole section A2,
Remaining ladder bolthole is aperture section A3, and the diameter of big hole section A2 is greater than head end B4b 4~10mm of diameter after extruding, macropore
The flange of position-limiting drum B3 fits closely excavation face A1 after the depth of section A2 meets flexible anchor body of rod B insertion bolthole；
Step b, Anchor Agent is put into anchor pole stepped hole, flexible anchor body of rod B is withstood into Anchor Agent, utilizes the flexible anchor body of rod
Anchor Agent is pushed into anchor pole stepped hole bottom hole by the front B, is determined torque nut D using jumbolter rotation and then is driven the flexible anchor body of rod
B and anti-torsion aligning bulb F rotate together, promote flexible roof bolt to stir evenly Anchor Agent by jumbolter while rotation,
Rotation promotes, until the flange of position-limiting drum B3 fits closely jumbolter after facing excavation face A1 and stops rotating, stops 30 seconds and waits
Anchor Agent solidification；
Step c: starting jumbolter drive determine torque nut D rotate and destroy determine torque nut D determine torque structure, make
Determine torque nut D to continue to screw in and compress antifriction washer E, anti-torsion aligning bulb F, pallet C along connector sleeve B4, so that pallet C
On stop column C2 snap into excavation face A1 pallet C prevented to rotate, the groove on I F2 of protrusion on aligning bulb F and pallet C at this time
C1d is blocked, and then prevents anti-torsion aligning bulb F from rotating, and the anti-aligning bulb F that turns round passes through II F3 of protrusion limitation connector sleeve B4's
The rotation of flexible anchor body of rod B is rotated and then limits, so that flexible anchor body of rod B does not rotate when jumbolter applies pretightning force,
Pretightning force is 60~100kN.
Step d: jumbolter of backing off repeats step a~c and constructs next flexible roof bolt.
Claims (1)
1. a kind of construction method of flexible roof bolt, the flexible roof bolt used includes the flexible anchor body of rod (B), pallet (C), determines torque spiral shell
Female (D), antifriction washer (E) and anti-torsion aligning bulb (F), wherein pallet (C) setting is in the tail portion the flexible anchor body of rod (B), fixed torsion
Square nut (D) fixed tray (C), pallet (C) and determine between torque nut (D) be equipped with antifriction washer (E) and anti-torsion spherical ball
Head (F)；
Wherein the flexible anchor body of rod (B) includes steel strand wires (B1), and steel strand wires (B1) tail end is arranged in connector sleeve (B4), the connection
Set (B4) includes tail end (B4a) and head end (B4b), and the changeover portion between tail end (B4a) and head end (B4b) is equipped with ring structure
Boss (B4e), boss (B4e) be equipped with position-limiting drum (B3), boss (B4e) towards the face of head end (B4b) be perpendicular end surface, boss
(B4e) it is tapered surface towards the face of tail end (B4a), there is screw thread on the external cylindrical surface of tail end (B4a), tail end (B4a) is provided with pair
Claim the rectangular channel (B4f) of arrangement being axially arranged along connector sleeve (B4), head end (B4b) is equipped with the inner circle connecting with steel strand wires (B1)
Post holes (B4c), interior cylindrical hole (B4c) bottom hole are equipped with annular groove (B4d), the cylinder of steel strand wires (B1) insertion connector sleeve (B4)
In hole (B4c), setting increases mousse spring (B2) between steel strand wires (B1) and cylindrical hole (B4c), by being press-connected set (B4) head end
(B4b) mode of external cylindrical surface realizes the fastening between steel strand wires (B1) and connector sleeve (B4)；
The position-limiting drum (B3) includes position-limiting drum conical shell (B3c), and position-limiting drum conical shell (B3c) includes small one and large one two
It being open, the big opening on position-limiting drum conical shell (B3c) is equipped with flange (B3a), small opening is equipped with annular bayonet (B3b),
The internal diameter of annular bayonet (B3b) is less than the 0.5~2mm of outer diameter of boss (B4e), and position-limiting drum (B3) is by connector sleeve (B4) tail end
(B4a) it is inserted in, annular bayonet (B3b), which deforms and crosses the tapered end face of boss (B4e), is stuck in the perpendicular end surface of boss (B4e)
On, position-limiting drum (B3) is hard plastic material composition；
The pallet (C) includes tray body (C1) and stop column (C2), and tray body (C1) is circular turn-up portion (C1b) by shape
It is formed with arch (C1c), the center of arch (C1c) is equipped with bellmouth (C1a), and the big end of bellmouth (C1a) is towards arch (C1c)
Top, and circumferentially equally distributed multiple tracks groove (C1d) is provided on the tapered surface of bellmouth (C1c), groove (C1d)
Number is 4~8, and stop column (C2) is fixed by welding or interference connection and turn-up portion (C1b)；
The anti-torsion aligning bulb (F) includes cambered surface and plane, and wherein cambered surface includes multiple tapered surfaces (F1), every two taper
I (F2) of protrusion together is equipped between face (F1), the radius of tapered surface (F1) is identical as the radius of the bellmouth (C1a), protrusion I
(F2) width and height is less than groove (C1d), and the quantity of I (F2) of protrusion is identical as the quantity of groove (C1d), and flexible roof bolt is pre-
When tight, I (F2) of protrusion insertion groove (C1d) ensures that the circumferencial direction between anti-torsion bulb (F) and pallet (C) is fixed, anti-torsion
Circular hole (F4) is arranged in the modulation bulbus cordis head center (F), the protrusion II (F3) that setting opposite side is distributed in circular hole, the section of II (F3) of protrusion
For rectangular configuration, raised II (F3) width is compared with the small 0.5~1mm of width of rectangular channel (B4f), and the height of II (F3) of protrusion is compared with rectangle
Small 0.5~the 1mm of width of slot (B4f), II (F3) of protrusion are embedded in the limitation flexible anchor body of rod (B) torsion in rectangular channel (B4f).
It is characterized in that specific step is as follows:
Step a, the construction ladder bolthole in rock mass (A), wherein the ladder bolthole close to excavation face (A1) is big hole section
(A2), remaining ladder bolthole is aperture section (A3), and the diameter of big hole section (A2) is greater than head end (B4b) diameter 4 after extruding
~10mm, the flange of position-limiting drum (B3) fits closely after the depth of big hole section (A2) meets the flexible anchor body of rod (B) insertion bolthole
Excavation face (A1)；
Step b, Anchor Agent is put into anchor pole stepped hole, the flexible anchor body of rod (B) is withstood into Anchor Agent, utilizes the flexible anchor body of rod
(B) Anchor Agent is pushed into anchor pole stepped hole bottom hole by front, is determined torque nut (D) using jumbolter rotation and then is driven flexible anchor
The body of rod (B) and anti-torsion aligning bulb (F) rotate together, promote flexible roof bolt to stir Anchor Agent by jumbolter while rotation
It mixes uniformly, rotation promotes, until the flange of position-limiting drum (B3) fits closely and faces excavation face (A1) jumbolter stops rotating afterwards,
Stop waiting Anchor Agent solidification in 30 seconds；
Step c: starting jumbolter drive determine torque nut (D) rotation and destroy determine torque nut (D) determine torque structure, make
Determine torque nut (D) to continue to screw in and compress antifriction washer (E), anti-torsion aligning bulb (F), pallet (C) along connector sleeve (B4),
Pallet (C) is prevented to rotate so that the stop column (C2) on pallet (C) snaps into excavation face (A1), it is convex on aligning bulb (F) at this time
It plays I (F2) to block with the groove (C1d) on pallet (C), and then prevents anti-torsion aligning bulb (F) from rotating, anti-torsion spherical ball
Head (F) limits the rotation of the flexible anchor body of rod (B) by the rotation of II (F3) of protrusion limitation connector sleeve (B4), so that anchor pole bores
The flexible anchor body of rod (B) does not rotate when machine applies pretightning force, and pretightning force is 60~100kN.
Step d: jumbolter of backing off repeats step a~c and constructs next flexible roof bolt.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910073740.0A CN109488355B (en) | 2019-01-25 | 2019-01-25 | A kind of construction method of flexible roof bolt |
| PCT/CN2019/090616 WO2020151162A1 (en) | 2019-01-25 | 2019-06-11 | Construction method for flexible anchor rod |
| CA3156371A CA3156371C (en) | 2019-01-25 | 2019-06-11 | Construction method for flexible anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910073740.0A CN109488355B (en) | 2019-01-25 | 2019-01-25 | A kind of construction method of flexible roof bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109488355A true CN109488355A (en) | 2019-03-19 |
| CN109488355B CN109488355B (en) | 2019-09-03 |
Family
ID=65714887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910073740.0A Active CN109488355B (en) | 2019-01-25 | 2019-01-25 | A kind of construction method of flexible roof bolt |
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| Country | Link |
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| CN (1) | CN109488355B (en) |
| CA (1) | CA3156371C (en) |
| WO (1) | WO2020151162A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130962A (en) * | 2019-07-01 | 2019-08-16 | 尤洛卡（山东）矿业科技有限公司 | Big pallet can be recycled in one kind |
| WO2020151162A1 (en) * | 2019-01-25 | 2020-07-30 | 中国矿业大学 | Construction method for flexible anchor rod |
| CN113738423A (en) * | 2021-09-08 | 2021-12-03 | 中国矿业大学 | Coal mine tunnel ultrahigh-strength anti-bending shear anchor cable supporting device and supporting method |
| CN113957996A (en) * | 2021-11-17 | 2022-01-21 | 甘肃天水绿色装配式建筑产业发展有限公司 | High-toughness prestress fabricated concrete building structure |
| WO2024173981A1 (en) * | 2023-02-21 | 2024-08-29 | Hardrock Mining Solutions Pty Ltd | Installation tool for inserting a rock bolt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113090312A (en) * | 2021-04-29 | 2021-07-09 | 湖南科技大学 | Yielding anchor rod capable of applying pretightening force and using method thereof |
| CN114136255B (en) * | 2021-11-30 | 2024-02-02 | 重庆大学 | Measuring point self-locking structure and multi-point displacement meter with same |
| CN115110978B (en) * | 2022-06-17 | 2024-08-09 | 成都现代万通锚固技术有限公司 | One-step bolter mounting joint, anchor rod comprising joint and mounting method of anchor rod |
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| WO2020151162A1 (en) * | 2019-01-25 | 2020-07-30 | 中国矿业大学 | Construction method for flexible anchor rod |
| CN110130962A (en) * | 2019-07-01 | 2019-08-16 | 尤洛卡（山东）矿业科技有限公司 | Big pallet can be recycled in one kind |
| CN110130962B (en) * | 2019-07-01 | 2020-06-16 | 尤洛卡（山东）矿业科技有限公司 | Recoverable big tray |
| CN113738423A (en) * | 2021-09-08 | 2021-12-03 | 中国矿业大学 | Coal mine tunnel ultrahigh-strength anti-bending shear anchor cable supporting device and supporting method |
| CN113957996A (en) * | 2021-11-17 | 2022-01-21 | 甘肃天水绿色装配式建筑产业发展有限公司 | High-toughness prestress fabricated concrete building structure |
| WO2024173981A1 (en) * | 2023-02-21 | 2024-08-29 | Hardrock Mining Solutions Pty Ltd | Installation tool for inserting a rock bolt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109488355B (en) | 2019-09-03 |
| CA3156371C (en) | 2023-11-21 |
| CA3156371A1 (en) | 2020-07-30 |
| WO2020151162A1 (en) | 2020-07-30 |
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