CN109488355B - A kind of construction method of flexible roof bolt - Google Patents

A kind of construction method of flexible roof bolt Download PDF

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Publication number
CN109488355B
CN109488355B CN201910073740.0A CN201910073740A CN109488355B CN 109488355 B CN109488355 B CN 109488355B CN 201910073740 A CN201910073740 A CN 201910073740A CN 109488355 B CN109488355 B CN 109488355B
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China
Prior art keywords
rod
flexible
pallet
protrusion
torsion
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CN201910073740.0A
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CN109488355A (en
Inventor
张农
谢正正
魏群
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Priority to CN201910073740.0A priority Critical patent/CN109488355B/en
Publication of CN109488355A publication Critical patent/CN109488355A/en
Priority to CA3156371A priority patent/CA3156371C/en
Priority to PCT/CN2019/090616 priority patent/WO2020151162A1/en
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Publication of CN109488355B publication Critical patent/CN109488355B/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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 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 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 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 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

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

A kind of construction method of flexible roof bolt
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) is arranged in the tail portion the 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)；
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 inner circle of steel strand wires (B1) insertion connector sleeve (B4) In post holes (B4c), setting increases mousse spring (B2) between steel strand wires (B1) and interior cylindrical hole (B4c), by being press-connected set (B4) The mode of head end (B4b) 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) deforms and crosses the tapered end face of boss (B4e) and is stuck in the perpendicular end surface of boss (B4e), limits Position cylinder (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 (C1a), 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 tapered surface (F1) I (F2) of protrusion together is equipped between, 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 aligning bulb (F) and pallet (C) is fixed, and prevents Turn round the aligning bulb center (F) setting circular hole (F4), 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), the diameter of big hole section (A2) be greater than head end (B4b) diameter after extruding 4 ~ 10mm, the flange of position-limiting drum (B3) fits closely out after the depth of big hole section (A2) meets the flexible anchor body of rod (B) insertion bolthole Digging 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), make It obtains the stop column (C2) on pallet (C) and snaps into excavation face (A1) prevention pallet (C) rotation, at this time on anti-torsion aligning bulb (F) I (F2) of protrusion is blocked with the groove (C1d) on pallet (C), and then prevents anti-torsion aligning bulb (F) from rotating, anti-torsion aligning Bulb (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 The flexible anchor body of rod (B) does not rotate when drilling 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.
CN201910073740.0A 2019-01-25 2019-01-25 A kind of construction method of flexible roof bolt Active CN109488355B (en)

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
CA3156371A CA3156371C (en) 2019-01-25 2019-06-11 Construction method for flexible anchor rod
PCT/CN2019/090616 WO2020151162A1 (en) 2019-01-25 2019-06-11 Construction method for flexible anchor rod

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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

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CN109488355A CN109488355A (en) 2019-03-19
CN109488355B true CN109488355B (en) 2019-09-03

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WO (1) WO2020151162A1 (en)

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* Cited by examiner, † Cited by third party
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CN109488355B (en) * 2019-01-25 2019-09-03 中国矿业大学 A kind of construction method of flexible roof bolt
CN110130962B (en) * 2019-07-01 2020-06-16 尤洛卡（山东）矿业科技有限公司 Recoverable big tray
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
CN113738423B (en) * 2021-09-08 2023-02-03 中国矿业大学 Coal mine tunnel ultrahigh-strength anti-bending shear anchor cable supporting device and supporting method
CN113957996B (en) * 2021-11-17 2023-05-23 甘肃天水绿色装配式建筑产业发展有限公司 High-toughness prestress assembled concrete building structure
CN114136255B (en) * 2021-11-30 2024-02-02 重庆大学 Measuring point self-locking structure and multi-point displacement meter with same

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