CN105863699A - Grouting reinforcing large-deformation anchor bolt and method using grouting reinforcing large-deformation anchor bolt to reinforce rock body - Google Patents

Grouting reinforcing large-deformation anchor bolt and method using grouting reinforcing large-deformation anchor bolt to reinforce rock body Download PDF

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Publication number
CN105863699A
CN105863699A CN201610351164.8A CN201610351164A CN105863699A CN 105863699 A CN105863699 A CN 105863699A CN 201610351164 A CN201610351164 A CN 201610351164A CN 105863699 A CN105863699 A CN 105863699A
Authority
CN
China
Prior art keywords
rod
anchor pole
anchor bolt
rock mass
anchor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610351164.8A
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Chinese (zh)
Inventor
左宇军
于美鲁
曹俊才
曲闯
何晨宏
张凯
董启龙
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Guizhou University
Original Assignee
Guizhou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guizhou University filed Critical Guizhou University
Priority to CN201610351164.8A priority Critical patent/CN105863699A/en
Publication of CN105863699A publication Critical patent/CN105863699A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • E21D20/02Setting anchoring-bolts with provisions for grouting
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0033Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0046Anchoring-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
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0093Accessories

Abstract

The invention provides a grouting reinforcing large-deformation anchor bolt and a method using the grouting reinforcing large-deformation anchor bolt to reinforce a rock body. The grouting reinforcing large-deformation anchor bolt is formed by sequentially butting at least two bolt bodies by a sheath pipe along the length direction; the two opposite ends of the two adjacent bolt bodies are respectively and glidingly arranged in the sleeve pipe; damping parts are respectively arranged between the ends of the two bolt bodies and the sleeve pipe, and are used for preventing the bolt bodies from sliding to the exterior direction of the sleeve pipe; a grouting stop plug is sheathed at the outer side of one end of each anchor bolt, and is used for preventing the grout from flowing out of an anchor bolt fixing hole; a grouting stop plug fixing part is pressed at the outer side of each grouting stop plug. The grouting reinforcing large-deformation anchor bolt is used for solving the problems that the existing anchor bolt is easily damaged due to larger pull stress in the deep tunnels, the material cost of the yield large-deformation anchor bolt is high, and the anchor bolt is not suitable for large-area use; although a certain function of the existing yield large-deformation anchor bolt is realized, the pull breaking of the anchor bolt is still the major factor causing the failure of final support. The grouting reinforcing large-deformation anchor bolt belongs to the field of rock body reinforcing of mines.

Description

Grouting and reinforcing large deformation anchor rod and the method utilizing its consolidating crack
Technical field
The present invention relates to a kind of grouting and reinforcing anchor pole and reinforcement means, belong to rock mass reinforcing field.
Background technology
At present, along with the mining degree of depth is continuously increased, pressure from surrounding rock the most constantly increases, soft rock mass and high-ground stress in the face of deep, currently known anchor pole is easily drawn bad by bigger tension in deep tunnel, and when rock crushing degree is higher, the anchorage effect of anchor pole the most easily lost efficacy.Based on problems, spy improves and expects and can play a role in actual production.
But, more existing allowing presses large deformation anchor rod to there is also some problems, mainly shows themselves in that
(1) can large deformation material cost higher, be not suitable for large-area use, still have cost to be reduced in the face of universal deep mining problem;
(2) design unsatisfactory, although serve certain effect, but anchor pole break the main factor still resulting in final supporting failure.
Summary of the invention
It is an object of the invention to: a kind of grouting and reinforcing large deformation anchor rod and the method utilizing its consolidating crack are provided, easily drawn bad by bigger tension with the existing anchor pole of solution in deep tunnel, and make pressure large deformation anchor rod material cost high, be not suitable for large-area use, although and existing allow pressure large deformation anchor rod serve certain effect, but anchor pole break the main factor problem still resulting in final supporting failure.
The solution of the present invention is as follows: a kind of grouting and reinforcing large deformation anchor rod, described anchor pole is docked successively by sleeve pipe along its length by least two sections of bodies of rod and forms, adjacent two sections of bodies of rod just to two ends be all slideably positioned in sleeve pipe, and between the end of two sections of bodies of rod and sleeve pipe, it is provided with the damper portion for hindering the body of rod outside direction slip towards sleeve pipe, the outer sheath of described anchor pole one end is provided with for preventing slurries from overflowing the stop grouting plug of anchor pole fixing hole, and the outer side compression of stop grouting plug is provided with stop grouting plug fixed part.
Described stop grouting plug fixed part includes the backing plate screwing the nut being sheathed on anchor pole and being arranged between nut and stop grouting plug, by tightening nut, stop grouting plug is compressed by backing plate.
One end of described anchor pole is provided with anchor head, and the other end is provided with stifled slurry plug, offers slurry-feeding hole along its length, the sidewall of the body of rod offers the slurry outlet being connected with slurry-feeding hole in anchor pole in the body of rod;
Described damper portion is the damping material being filled between the end of the body of rod and sleeve pipe, and the first pretightning force that the resistance of damper portion is axially subject to more than the body of rod;
The method utilizing above-mentioned bolt anchorage rock mass, including:
Anchor pole importing the step within rock mass: when anchor pole imports rock mass inside, anchor head is bonded in internal rock mass by powder stick;
By anchor pole step of reperfusion serosity in rock mass: tightening nut, backing plate is made to be compacted to by stop grouting plug between opening part and the anchor pole of anchor pole entrance hole, prevent slurries from overflowing, by the slurry-feeding hole of anchor pole one end and slurry outlet reperfusion serosity in rock mass of being connected with slurry-feeding hole, along with the solidification of slurries, anchor pole forms an entirety with rock mass;
Under external force, when rock mass occurs STRESS VARIATION once again, anchor pole is by extra tension, and now the body of rod of inside pipe casing is owing to pulling force is more than the resistance of damper portion, the body of rod is to slide outside, the partial-length of the body of rod is released, and the stress of rock mass is released, during this, damper portion is constantly compressed, the resistance of the body of rod is gradually increased by damper portion, and then body of rod tension reaches balance again with the resistance of damper portion, and rock mass reaches stable again.
The present invention is compared with prior art, major advantage is: under external force, when there is bigger STRESS VARIATION in rock mass, this anchor pole can extended length, the stress making rock mass is released and again consolidates, and this process is less to the damage of anchor pole, improve the service life of anchor pole, while consolidating crack stability, bear the deformation of roadway surrounding rock greatly, and simple in construction, additionally, owing to this material quality of bolt is common, support cost can be significantly saved for the new material of other large deformation, while Quadratic Stability rock mass, it also is able to save the usage amount of anchor pole.
Accompanying drawing explanation
Fig. 1 is the structural representation of this anchor pole;
Fig. 2 is the sectional view of this anchor pole middle sleeve part;
Fig. 3 is the work variation diagram of Fig. 2.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below with reference to accompanying drawings,
Embodiment:
nullWith reference to Fig. 1、2 and 3,The present embodiment provides a kind of grouting and reinforcing large deformation anchor rod,Described anchor pole is docked successively by sleeve pipe 2 along its length by four sections of bodies of rod 1 and forms (body of rod 1 is all coaxially disposed),One end of anchor pole is provided with anchor head 8,The other end is provided with stifled slurry plug 9,Anchor pole offers in the body of rod 1 slurry-feeding hole 11 along its length,The slurry-feeding hole 11 of adjacent two sections of bodies of rod 1 is connected,The slurry outlet 12 being connected with slurry-feeding hole 11 is offered on the sidewall of the body of rod 1,Adjacent two sections of bodies of rod 1 just to two ends be all slideably positioned in sleeve pipe 2,And between the end of two sections of bodies of rod 1 and sleeve pipe 2, it is provided with the damper portion 3 for hindering the body of rod 1 outside direction slip towards sleeve pipe 2,State damper portion 3 and be the damping material being filled between the end of the body of rod 1 and sleeve pipe 2,And the first pretightning force that the resistance of damper portion 3 is axially subject to more than the body of rod 1,The outer sheath of described anchor pole one end is provided with for preventing slurries from overflowing the stop grouting plug 4 of anchor pole fixing hole,The outer side compression of stop grouting plug 4 is provided with stop grouting plug fixed part 5,Stop grouting plug fixed part 5 includes screwing the nut 6 being sheathed on anchor pole and the backing plate 7 being arranged between nut 6 and stop grouting plug 4,By tightening nut 6, stop grouting plug 4 is compressed by backing plate 7.

Claims (5)

1. a grouting and reinforcing large deformation anchor rod, it is characterized in that: described anchor pole is docked successively by sleeve pipe (2) along its length by least two sections of bodies of rod (1) and forms, adjacent two sections of bodies of rod (1) just to two ends be all slideably positioned in sleeve pipe (2) in, and between the end of two sections of bodies of rod (1) and sleeve pipe (2), it is provided with the damper portion (3) for hindering the body of rod (1) the outside direction slip towards sleeve pipe (2), the outer sheath of described anchor pole one end is provided with for preventing slurries from overflowing the stop grouting plug (4) of anchor pole fixing hole, the outer side compression of stop grouting plug (4) is provided with stop grouting plug fixed part (5).
A kind of grouting and reinforcing large deformation anchor rod, it is characterized in that: described stop grouting plug fixed part (5) includes screwing the nut (6) being sheathed on anchor pole and the backing plate (7) being arranged between nut (6) and stop grouting plug (4), by tightening nut (6), stop grouting plug (4) is compressed by backing plate (7).
A kind of grouting and reinforcing large deformation anchor rod, it is characterized in that: one end of described anchor pole is provided with anchor head (8), the other end is provided with stifled slurry plug (9), anchor pole offers in the body of rod (1) slurry-feeding hole (11) along its length, the sidewall of the body of rod (1) offers the slurry outlet (12) being connected with slurry-feeding hole (11).
A kind of grouting and reinforcing large deformation anchor rod, it is characterized in that: described damper portion (3) is the damping material being filled between the end of the body of rod (1) and sleeve pipe (2), and the first pretightning force that the resistance of damper portion (3) is axially subject to more than the body of rod (1).
5. utilize the method for bolt anchorage rock mass described in claim 3, it is characterised in that including:
Anchor pole importing the step within rock mass: when anchor pole imports rock mass inside, anchor head is bonded in internal rock mass by powder stick;
By anchor pole step of reperfusion serosity in rock mass: by stop grouting plug fixed part (5) stop grouting plug (4) is compacted between opening part and the anchor pole of anchor pole entrance hole, by the slurry-feeding hole (11) of anchor pole one end and slurry outlet (12) reperfusion serosity in rock mass that is connected with slurry-feeding hole (11), along with the solidification of slurries, anchor pole forms an entirety with rock mass;
Under external force, when there is STRESS VARIATION once again in rock mass, anchor pole is by extra tension, the body of rod (1) that now sleeve pipe (2) is internal is owing to pulling force is more than the resistance of damper portion (3), the body of rod (1) is to slide outside, the partial-length of the body of rod (1) is released, the stress of rock mass is released, during this, damper portion (3) is constantly compressed, the resistance of the body of rod (1) is gradually increased by damper portion (3), then the body of rod (1) tension reaches balance again with the resistance of damper portion (3), rock mass reaches stable again.
CN201610351164.8A 2016-05-25 2016-05-25 Grouting reinforcing large-deformation anchor bolt and method using grouting reinforcing large-deformation anchor bolt to reinforce rock body Pending CN105863699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610351164.8A CN105863699A (en) 2016-05-25 2016-05-25 Grouting reinforcing large-deformation anchor bolt and method using grouting reinforcing large-deformation anchor bolt to reinforce rock body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610351164.8A CN105863699A (en) 2016-05-25 2016-05-25 Grouting reinforcing large-deformation anchor bolt and method using grouting reinforcing large-deformation anchor bolt to reinforce rock body

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107916948A (en) * 2018-01-22 2018-04-17 河南理工大学 A kind of coal mine support anchor rod component
CN108071419A (en) * 2016-11-10 2018-05-25 辽宁工程技术大学 A kind of bump protective device for colliery
CN110424388A (en) * 2019-08-08 2019-11-08 重庆地质矿产研究院 A kind of quake-proof type modularization anchor
CN112068192A (en) * 2020-09-10 2020-12-11 中南大学 Movable mounting device and mounting method for microseismic sensor

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044272A2 (en) * 1980-07-11 1982-01-20 SIG Schweizerische Industrie-Gesellschaft Device for pressing a two-component adhesive into a pipe in order to produce a non-prestressed anchor
CN201162216Y (en) * 2008-03-10 2008-12-10 成都现代万通锚固技术有限公司 Anti-back overflow combination type anchor bar
CN202417557U (en) * 2012-01-15 2012-09-05 山东科技大学 Resistance increasing and yielding large-deformation anchor rod
CN103016035A (en) * 2012-12-27 2013-04-03 辽宁工程技术大学 Abdicating buffer energy-absorbing shock-proof anchor rod cable for coal mine
CN103573279A (en) * 2013-11-14 2014-02-12 山东科技大学 Mining telescopic energy adsorption anti-impact viscous damping anchor rod and supporting method thereof
CN103643977A (en) * 2013-11-21 2014-03-19 中国矿业大学 Full-anchor partition pressure transferring grouting anchor rod and application method thereof
CN103850696A (en) * 2014-01-22 2014-06-11 山东科技大学 Multi-section anchoring type mortar anchor rod and anchoring method thereof
CN103911993A (en) * 2014-04-18 2014-07-09 周同和 PHA (preliminary hazard analysis) anchor rod and construction method thereof
CN104674808A (en) * 2015-02-28 2015-06-03 安徽理工大学 Novel assembly type hollow grouting anchor bolt and construction method thereof
CN205654363U (en) * 2016-05-25 2016-10-19 贵州大学 Large deformation stock is consolidated in slip casting

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044272A2 (en) * 1980-07-11 1982-01-20 SIG Schweizerische Industrie-Gesellschaft Device for pressing a two-component adhesive into a pipe in order to produce a non-prestressed anchor
CN201162216Y (en) * 2008-03-10 2008-12-10 成都现代万通锚固技术有限公司 Anti-back overflow combination type anchor bar
CN202417557U (en) * 2012-01-15 2012-09-05 山东科技大学 Resistance increasing and yielding large-deformation anchor rod
CN103016035A (en) * 2012-12-27 2013-04-03 辽宁工程技术大学 Abdicating buffer energy-absorbing shock-proof anchor rod cable for coal mine
CN103573279A (en) * 2013-11-14 2014-02-12 山东科技大学 Mining telescopic energy adsorption anti-impact viscous damping anchor rod and supporting method thereof
CN103643977A (en) * 2013-11-21 2014-03-19 中国矿业大学 Full-anchor partition pressure transferring grouting anchor rod and application method thereof
CN103850696A (en) * 2014-01-22 2014-06-11 山东科技大学 Multi-section anchoring type mortar anchor rod and anchoring method thereof
CN103911993A (en) * 2014-04-18 2014-07-09 周同和 PHA (preliminary hazard analysis) anchor rod and construction method thereof
CN104674808A (en) * 2015-02-28 2015-06-03 安徽理工大学 Novel assembly type hollow grouting anchor bolt and construction method thereof
CN205654363U (en) * 2016-05-25 2016-10-19 贵州大学 Large deformation stock is consolidated in slip casting

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108071419A (en) * 2016-11-10 2018-05-25 辽宁工程技术大学 A kind of bump protective device for colliery
CN107916948A (en) * 2018-01-22 2018-04-17 河南理工大学 A kind of coal mine support anchor rod component
CN110424388A (en) * 2019-08-08 2019-11-08 重庆地质矿产研究院 A kind of quake-proof type modularization anchor
CN112068192A (en) * 2020-09-10 2020-12-11 中南大学 Movable mounting device and mounting method for microseismic sensor

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Application publication date: 20160817