CN106640160A - Left-handed longitudinal-bar-free full-length high-prestress anchor rod and construction technique thereof - Google Patents
Left-handed longitudinal-bar-free full-length high-prestress anchor rod and construction technique thereof Download PDFInfo
- Publication number
- CN106640160A CN106640160A CN201610937567.0A CN201610937567A CN106640160A CN 106640160 A CN106640160 A CN 106640160A CN 201610937567 A CN201610937567 A CN 201610937567A CN 106640160 A CN106640160 A CN 106640160A
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- Prior art keywords
- handed
- anchor rod
- hole
- rod body
- parts
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- 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.)
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- 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
- E21D20/025—Grouting with organic components, e.g. resin
Abstract
The invention provides a left-handed longitudinal-bar-free full-length high-prestress anchor rod and a construction technique thereof and relates to the technical field of roadway supporting. The left-handed longitudinal-bar-free full-length high-prestress anchor rod comprises a tray (1), a nut (2), an end bolt (3), a left-handed anchor rod body (4), an explosion valve and a slow hardening resin explosive roll (8); and an anchor rod body penetrating hole is formed in the tray (1), the tray (1) is fixedly installed on an opening of an anchor rod drill hole (10), the end bolt (3) is installed at one end of the left-handed anchor rod body (4); a longitudinal through hole (5) and a set of transverse through holes are formed in the left-handed anchor rod body (4); according to application of the left-handed longitudinal-bar-free full-length high-prestress anchor rod and the construction technique thereof, the problems that in the installation process, a fast-solidification anchoring agent and a slow-solidification anchoring agent are mutually mixed and the fast-solidification anchorage length is shortened under the stirring effect of a left-handed thread, are avoided, so that high prestress can be exerted on the anchor rod to strengthen the diffusion effect of prestress in a surrounding rock, and thus the control effect of the high-prestress fluffy breaking surrounding rock is improved.
Description
Technical field
The present invention relates to Roadway Support Technology field, and in particular to a kind of vertical muscle total length high pre-stress anchor pole of left-handed nothing and its
Construction technology.
Background technology
Safe efficient, economic Roadway Support Technology is to ensure mine safety, the necessary condition of efficiently production.Anchor pole
Shield technology producing coal country important abroad is widely applied, wherein with the U.S., Australia typical case the most, this and they
Coal seam geological condition is fairly simple, it is closely related to bury shallow and national attention technology, defines from design of its support, supporting
Construction equipment, suitable for the complete support technology body such as serial bolting and rope support product and reliable monitoring means of different condition
System, whole system more science, safety and reliability.According to incompletely statistics, the lane that the state-owned big-and-middle-sized colliery of China is newly tunneled every year
Road total length is up to kilometers up to ten thousand, wherein more than 80% is coal road and half-coal rock roadway.Suspension roof support has become China's coal-mine tunnel
First-selected, safely and efficiently main support form, for buried heavily stressed soft and broken surrounding rocks roadway bolting support, prestressing force is applied
It is value added more high more can notable deformation controlling for rock surrounding gateways.
The vertical muscle screw-thread steel of left-handed nothing is the main anchor rod body form that current colliery tunnel support is adopted, and it is based on building
With screw-thread steel profile, further transformation is formed.The characteristics of left-handed nothing vertical muscle twisted steel anchor rod is：Because the body of rod adopts left hand thread,
During the rotation forces of roof bolting equipment, resin curing agent is constantly pushed forward, resin fill can be caused closely knit.But
The vertical muscle full-length prestress anchor pole of left-handed nothing that at present Roadway Support Technology is used also has the following disadvantages：Rockbolt installation process
In, be sequentially placed into quick hardening resin powder stick and slow resins powder stick in drilling in advance, rig when anchor pole is pushed, lever front end head elder generation
Contact with slow resins powder stick, after the slow resins powder stick in front of lever front end head is stirred brokenly, push in left hand thread stirring and make
With under, the slow hardening Anchor Agent for being broken packaging will be to the flowing of drilling deep so that slow hardening Anchor Agent is mutual with fast solidifying Anchor Agent
Mixing, causes actual fast solidifying Anchor Agent in the taking off of anchorage length in drilling front end portion.At the same time, push away in anchor pole left hand thread
Under sending effect, the intra-segment for being originally used for the anchoring of quick hardening resin Anchor Agent divides the resin ring for closing on the body of rod to be replaced by slow resins,
If applying compared with high pre-stress, at screw thread cross rib high stress concentrations are caused, leading section is slow more than then causing after resin material intensity
Solidifying, rapid hardening hybrid resin Anchor Agent destruction, further weakens anchorage effect.In a word, before the prerequisite for applying high pre-stress is
The quick hardening resin of end should possess enough anchorage lengths and anchoring strength；But cause fast solidifying tree under the stirring action of left hand thread
Fat valid bonding length shortens, leading section anchoring strength is reduced, and is unfavorable for the applying of high pre-stress.
Accordingly, it would be desirable to a kind of being prevented from causing in installation process leading section fastening invalidation and can apply high in advance should
The left-handed non-longitudinal rib prestressed anchor pole of power and construction technology, with suitable for heavily stressed soft broken roadway support.
The content of the invention
The purpose of the present invention is primarily to solve above-mentioned technical problem, and provide a kind of vertical muscle total length height of left-handed nothing and in advance should
Power anchor pole and its construction technology.
A kind of vertical muscle total length high pre-stress anchor pole of left-handed nothing of the present invention includes pallet, nut, head bolts, left-handed anchor pole bar
Body, explosive valve and slow resins powder stick, the pallet is provided with anchor rod body through hole, and pallet is fixedly mounted on the hole of armature boring
At mouthful, one end of the left-handed anchor rod body is provided with head bolts, longitudinal hole is provided with left-handed anchor rod body and one group horizontal
Through hole, one group of cross through hole is connected respectively with longitudinal hole, and the head bolts of left-handed anchor rod body pass through the anchor of pallet
Club shaft passes through hole, and by nut check, the left-handed anchor rod body in armature boring, left-handed anchor rod body and anchor
It is resin anchoring agent between bar drill hole, the both sides port of one group of cross through hole is respectively fitted with explosive valve.
The slow resins powder stick 8 is made up of materials A and material B, and the materials A is resin-bonded mastic, by unsaturated polyester (UP)
Resin 80-100 parts, cobalt naphthenate 0.0025-0.015 parts, inorganic filler 300-600 parts mix according to weight ratio,
The material B is common slow hardening curing agent, by methyl ethyl ketone peroxide 0.04-0.12 parts, repefral 0.01-0.05
Part, talcum powder 0.03-0.15 parts ratio composition by weight.
A kind of construction technology of the vertical muscle total length high pre-stress anchor pole of left-handed nothing, comprises the following steps：
1.. measurement, positioning armature boring；
2.. drilled eye by design size with jumbolter；
3.. high pressure water washing drills；
4.. several slow resins powder sticks are pushed into drilling with left-handed anchor rod body, it is ensured that resin explosive roll quantity can realize total length
Anchoring；
5.. left hand thread steel pole body is installed with jumbolter；
6.. when the front end of left-handed anchor rod body 4 pierces bottom hole completely, by longitudinal hole 5, cross through hole 6 and explosive valve 7
Injection anchoring material C, anchoring material C form fast-set resin powder stick 11 after mixing with the slow resins powder stick 8 being stirred, realize
End rapid hardening, external resin liquid is flowed into and resulted in blockage in cross through hole 6, and explosive valve is unidirectional unlatching, works as cross through hole（6）It is interior
Injection pressure exceed explosion valve opening pressure after, explosive valve 7 is opened, material C flow into the body of rod and drilling between, before realizing anchor pole
End rapid hardening；
7.. accelerate stirring Anchor Agent to reach after predetermined stirring resistance, stop stirring；
8.. the resin for treating left-handed anchor rod body leading section is fully cured, and installs pallet and nut；
9.. by longitudinal hole to filler D in the hole of longitudinal hole and one group of cross through hole.
The material C is by dimethyl-p-toluidine DMT0.6-1.5 parts, dimethylaniline DMA0.2-1.5 parts, solvent 0.5-
3 parts mix according to weight ratio；The material D is by unsaturated polyester resin 80-120 parts, inorganic filler 200-300 parts, BPO
Powder 5-10 parts mix according to weight ratio.
The method have the advantages that：The application of the present invention can be prevented effectively from installation process because leading under left hand thread stirring action
The fast solidifying and slow hardening Anchor Agent of cause is mutually mixed, the problem of rapid hardening taking off of anchorage length, so as to apply high pre-stress, increasing to anchor pole
The strength prestressed diffusion in country rock, improves the control action to heavily stressed soft and broken surrounding rocks, with application well
Promotional value.
Description of the drawings
Fig. 1 is that a kind of vertical muscle total length high pre-stress anchor pole of left-handed nothing adds material C to form fast-set resin powder stick structural representation
Figure.
Fig. 2 is left-handed anchor rod body and explosive valve assembly structure diagram.
Fig. 3 is a kind of construction flow chart of the vertical muscle total length high pre-stress anchor pole of left-handed nothing.
Fig. 4 is slow hardening Anchor Agent component schematic diagram.
Fig. 5 is rapid solidification anchor agent component schematic diagram.
In figure：1st, pallet；2nd, nut；3rd, head bolts；4th, left-handed anchor rod body；5th, longitudinal hole；6th, one group laterally leads to
Hole；7th, explosive valve；8th, slow resins powder stick；9th, Anchor Agent；10th, armature boring；11st, fast-set resin powder stick.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention will be further described.
As shown in Fig. 1,2,3,4,5, a kind of vertical muscle total length high pre-stress anchor pole of left-handed nothing of the present invention includes pallet 1, nut
2nd, head bolts 3, left-handed anchor rod body 4, explosive valve 7 and slow resins powder stick 8, the pallet 1 is provided with anchor rod body through hole,
Pallet 1 is fixedly mounted at the hole of armature boring 10, and one end of the left-handed anchor rod body 4 is provided with head bolts 3, left-handed anchor
Longitudinal hole 5 and one group of cross through hole 6 are provided with club shaft 4, one group of cross through hole 6 is connected respectively with longitudinal hole 5,
The head bolts 3 of left-handed anchor rod body 4 pass through hole through the anchor rod body of pallet 1, and are locked by nut 2, the left-handed anchor
Club shaft 4 in armature boring 10, between left-handed anchor rod body 4 and armature boring 10 be resin anchoring agent, one group is horizontal
The both sides port of through hole 6 is respectively fitted with explosive valve 7.
The slow resins powder stick 8 is made up of materials A and material B, and the materials A is resin-bonded mastic, by unsaturated polyester (UP)
Resin 80-100 parts, cobalt naphthenate 0.0025-0.015 parts, inorganic filler 300-600 parts mix according to weight ratio,
The material B is common slow hardening curing agent, by methyl ethyl ketone peroxide 0.04-0.12 parts, repefral 0.01-0.05
Part, talcum powder 0.03-0.15 parts ratio composition by weight.
A kind of construction technology of the vertical muscle total length high pre-stress anchor pole of left-handed nothing, comprises the following steps：
1.. measurement, positioning armature boring；
2.. drilled eye by design size with jumbolter；
3.. high pressure water washing drills；
4.. several slow resins powder sticks 8 are pushed into drilling with left-handed anchor rod body 4, it is ensured that resin explosive roll quantity can be realized entirely
Long anchoring；
5.. left hand thread steel pole body is installed with jumbolter；
6.. when the front end of left-handed anchor rod body 4 pierces bottom hole completely, by longitudinal hole 5, cross through hole 6 and explosive valve 7
Injection anchoring material C, anchoring material C form fast-set resin powder stick 11 after mixing with the slow resins powder stick 8 being stirred, realize
End rapid hardening, external resin liquid is flowed into and resulted in blockage in cross through hole 6, and explosive valve is unidirectional unlatching, works as cross through hole（6）It is interior
Injection pressure exceed explosion valve opening pressure after, explosive valve 7 is opened, material C flow into the body of rod and drilling between, before realizing anchor pole
End rapid hardening；
7.. accelerate stirring Anchor Agent to reach after predetermined stirring resistance, stop stirring；
8.. the resin for treating the leading section of left-handed anchor rod body 4 is fully cured, and installs pallet 1 and nut 2；
9.. by longitudinal hole 5 to filler D in the hole of longitudinal hole 5 and one group of cross through hole 6.
The material C is by dimethyl-p-toluidine DMT0.6-1.5 parts, dimethylaniline DMA0.2-1.5 parts, solvent 0.5-
3 parts mix according to weight ratio；The material D is by unsaturated polyester resin 80-120 parts, inorganic filler 200-300 parts, BPO
Powder 5-10 parts mix according to weight ratio.
Working method and principle：Install anchor pole when, into drilling fill slow resins powder stick, then by longitudinal hole,
, to anchor pole leading section injection material C, the effect of explosive valve is to prevent from being stirred during anchor pole is installed for cross through hole and explosive valve
External resin powder stick liquid is flowed into cross through hole during resin explosive roll, when rockbolt installation is to precalculated position, the pressure of injection material C
Power exceedes after explosion valve opening pressure, and explosive valve is opened, and C flows into drilling front end, and is capable of achieving after mixing with slow resins powder stick
Leading section rapid hardening；
Carrying out constructing according to process above step, it is fast because causing under left hand thread stirring action to be prevented effectively from installation process
Solidifying and slow hardening Anchor Agent is mutually mixed, the problem of rapid hardening taking off of anchorage length, so as to apply high pre-stress to anchor pole, strengthens pre-
Diffusion of the stress in country rock, improves the control action to heavily stressed soft and broken surrounding rocks.
Embodiment of above is merely to illustrate the present invention, and not limitation of the present invention, about the common of technical field
Technical staff, without departing from the spirit and scope of the present invention, can also make a variety of changes and modification, therefore all
The technical scheme of equivalent falls within scope of the invention, and the scope of patent protection of the present invention should be defined by the claims.
Claims (4)
1. a kind of left-handed nothing indulges muscle total length high pre-stress anchor pole, it is characterised in that it includes pallet（1）, nut（2）, head bolts
（3）, left-handed anchor rod body（4）, explosive valve（7）With slow resins powder stick（8）, the pallet（1）Anchor rod body is provided with through hole,
Pallet（1）It is fixedly mounted on armature boring（10）Hole at, the left-handed anchor rod body（4）One end be provided with head bolts
（3）, left-handed anchor rod body（4）Inside it is provided with longitudinal hole（5）With one group of cross through hole（6）, one group of cross through hole（6）Respectively
With longitudinal hole（5）It is connected, left-handed anchor rod body（4）Head bolts（3）Through pallet（1）Anchor rod body pass through hole,
And by nut（2）Locking, the left-handed anchor rod body（4）Positioned at armature boring（10）It is interior, left-handed anchor rod body（4）With anchor
Bar drill hole（10）Between be resin anchoring agent, one group of cross through hole（6）Both sides port be respectively fitted with explosive valve（7）.
2. a kind of left-handed nothing according to claim 1 indulges muscle total length high pre-stress anchor pole, it is characterised in that the slow hardening tree
Fat powder stick 8 is made up of materials A and material B, and the materials A is resin-bonded mastic, by unsaturated polyester resin 80-100 parts, aphthenic acids
Cobalt 0.0025-0.015 parts, inorganic filler 300-600 parts mix according to weight ratio, and the material B is common slow hardening
Curing agent, by methyl ethyl ketone peroxide 0.04-0.12 parts, repefral 0.01-0.05 parts, talcum powder 0.03-0.15
Part ratio composition by weight.
3. a kind of left-handed nothing indulges the construction technology of muscle total length high pre-stress anchor pole, it is characterised in that comprise the following steps：
1.. measurement, positioning armature boring；
2.. drilled eye by design size with jumbolter；
3.. high pressure water washing drills；
4.. use left-handed anchor rod body（4）By several slow resins powder sticks（8）Push drilling, it is ensured that resin explosive roll quantity can be real
Existing full length fastening；
5.. left hand thread steel pole body is installed with jumbolter；
6.. treat left-handed anchor rod body（4）When front end pierces bottom hole completely, by longitudinal hole（5）, cross through hole（6）And it is quick-fried
Broken valve（7）Injection anchoring material C, anchoring material C and the slow resins powder stick being stirred（8）Fast-set resin medicine is formed after mixing
Volume（11）, end rapid hardening is realized, external resin liquid flows into cross through hole（6）Inside result in blockage, explosive valve is unidirectional unlatching, when
Cross through hole（6）Interior injection pressure exceedes after explosion valve opening pressure, explosive valve（7）Open, material C flows into the body of rod with drilling
Between, realize the rapid hardening of anchor pole leading section；
7.. accelerate stirring Anchor Agent to reach after predetermined stirring resistance, stop stirring；
8.. treat left-handed anchor rod body（4）The resin of leading section is fully cured, and installs pallet（1）And nut（2）；
9.. by longitudinal hole（5）To longitudinal hole（5）With one group of cross through hole（6）Hole in filler D.
4. a kind of a kind of vertical muscle total length of left-handed nothing of the vertical muscle total length high pre-stress anchor pole of left-handed nothing according to claim 3 is high pre-
The construction technology of stress anchor pole, it is characterised in that the material C is by dimethyl-p-toluidine DMT0.6-1.5 parts, dimethylaniline
DMA0.2-1.5 parts, solvent 0.5-3 parts mix according to weight ratio；The material D by unsaturated polyester resin 80-120 parts,
Inorganic filler 200-300 parts, BPO powder 5-10 parts mix according to weight ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610937567.0A CN106640160B (en) | 2016-10-24 | 2016-10-24 | A kind of left-handed nothing indulges muscle overall length high pre-stress anchor pole and its construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610937567.0A CN106640160B (en) | 2016-10-24 | 2016-10-24 | A kind of left-handed nothing indulges muscle overall length high pre-stress anchor pole and its construction technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106640160A true CN106640160A (en) | 2017-05-10 |
| CN106640160B CN106640160B (en) | 2019-03-29 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610937567.0A Expired - Fee Related CN106640160B (en) | 2016-10-24 | 2016-10-24 | A kind of left-handed nothing indulges muscle overall length high pre-stress anchor pole and its construction technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106640160B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829768A (en) * | 2017-10-23 | 2018-03-23 | 山东建筑大学 | It is a kind of can explosion expand the Large Deformation Support device and technique of anchor structure automatically |
| CN108374680A (en) * | 2018-03-12 | 2018-08-07 | 中国矿业大学 | A kind of single hole is double to anchor assembled bolt and application method |
| CN109779665A (en) * | 2019-03-29 | 2019-05-21 | 攀枝花学院 | Bore anchoring integrated anchor rod |
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| EP0033246A1 (en) * | 1980-01-29 | 1981-08-05 | Fosroc International Limited | Capsules containing cementitious compositions |
| US4295760A (en) * | 1978-04-21 | 1981-10-20 | Warner Clifford C | Rock bolt anchor |
| US4313697A (en) * | 1979-09-17 | 1982-02-02 | Rozanc Richard C | Mine roof support plate bolt |
| CN101949294A (en) * | 2010-08-13 | 2011-01-19 | 山西潞安环保能源开发股份有限公司常村煤矿 | Prestressed full-length anchorage support method |
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| CN105484782A (en) * | 2016-01-08 | 2016-04-13 | 河南理工大学 | Anchor rod for achieving high-prestress total-length anchoring through double-fluid grouting cartridges and use method of anchor rod |
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2016
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| CN203214082U (en) * | 2013-05-06 | 2013-09-25 | 高原 | Novel hollow grouting anchor bolt |
| CN103485349A (en) * | 2013-09-20 | 2014-01-01 | 兰州理工大学 | Lime nail composite frame prestressed anchor tube structure and construction method for reinforcing weak slope |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829768A (en) * | 2017-10-23 | 2018-03-23 | 山东建筑大学 | It is a kind of can explosion expand the Large Deformation Support device and technique of anchor structure automatically |
| CN107829768B (en) * | 2017-10-23 | 2023-07-18 | 山东建筑大学 | Large-deformation supporting device and process capable of blasting automatic expansion anchoring structure |
| CN108374680A (en) * | 2018-03-12 | 2018-08-07 | 中国矿业大学 | A kind of single hole is double to anchor assembled bolt and application method |
| CN109779665A (en) * | 2019-03-29 | 2019-05-21 | 攀枝花学院 | Bore anchoring integrated anchor rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106640160B (en) | 2019-03-29 |
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