CN108397219A - Mining slip casting prestressed anchor and its application method - Google Patents
Mining slip casting prestressed anchor and its application method Download PDFInfo
- Publication number
- CN108397219A CN108397219A CN201810162431.6A CN201810162431A CN108397219A CN 108397219 A CN108397219 A CN 108397219A CN 201810162431 A CN201810162431 A CN 201810162431A CN 108397219 A CN108397219 A CN 108397219A
- Authority
- CN
- China
- Prior art keywords
- slip casting
- prestressed anchor
- anchor
- casting prestressed
- mining
- 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
Links
- 238000007569 slipcasting Methods 0.000 title claims abstract description 58
- 238000005065 mining Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000011435 rock Substances 0.000 claims abstract description 9
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 238000004873 anchoring Methods 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 239000000686 essence Substances 0.000 description 7
- 239000003245 coal Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000725 suspension Substances 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
- E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt material
-
- 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
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)
Abstract
The present invention provides a kind of mining slip casting prestressed anchor and its application methods, it is to flatten one end of essence bundle seamless steel pipe to be twisted into twisted shape, as anchored end；Essence is pricked into the upper screw thread of seamless steel pipe other end processing again and forms fastening end；The upper several plasma discharge holes of processing on the tube body that essence pricks seamless steel pipe again；In use, being packed into Anchor Agent powder stick to foot of hole first, drive anchor pole rotation to be stirred mixing to Anchor Agent powder stick with drilling machine, apply prestressing force after solidification outside drilling, effective preliminary bracing intensity is provided to the tunnel surface newly excavated；When needing slip casting, fastening end is accessed on the grouting valve of grouting equipment, is directly breaking surrounding rock slip casting.The present invention can provide prestressing force identical with existing twisted steel anchor rod, effective supporting intensity is provided to the tunnel surface newly excavated, the direct slip casting of grouting valve can be accessed when needing slip casting again, the secondary construction of grouted anchor bar is saved, substantially increases roadway support efficiency and economic benefit.
Description
Technical field
The present invention relates to the grouted anchor bars of mine timbering.
Background technology
With the increasingly increase of coal mining depth and intensity, it is efficient, safety in production that roadway support becomes restriction coal mine
One problem.Presently more than the large mining depth tunnel of 800 meters of depths, suspension roof support or Bolt/shotcreting/steel mesh combined support are mostly used as first branch
Shield.Anchor pole is made of regular screw threads steel, since regular screw threads steel can apply prestressing force, there is certain supporting intensity；But by
Yu Caishen is big, and often rock crusher deforms after roadway excavation, needs to carry out the secondary reparation in tunnel.When secondary reparation, generally
Using bolt grouting technique, then inlet well is beaten on palisades, grouted anchor bar is installed, with grouting equipment to breaking surrounding rock slip casting.
Above-mentioned grouted anchor bar generally uses common steel tube to be used as anchor bar body, bores on anchor bar body and goes up several plasma discharge holes.This secondary supporting
Mode considerably increases labor intensity and economic cost, reduces support efficiency.
Invention content
To solve the above problems, the present invention provides a kind of mining slip casting prestressed anchor, while providing a kind of slip casting
The application method of prestressed anchor；The disposable support pattern in large mining depth tunnel can be achieved in the present invention.
The technical solution adopted by the present invention is that：
A kind of mining slip casting prestressed anchor, which is characterized in that it is processed by following methods：
First, in accordance with the anchorage depth that tunnel is designed, the essence that corresponding length is intercepted according to anchorage depth pricks seamless steel pipe conduct
The slip casting prestressed anchor body of rod, one end flattening that essence is pricked to seamless steel pipe is twisted into twisted shape, as slip casting prestressed anchor anchored end；
Essence is pricked into the seamless steel pipe other end again and processes the fastening thread of upper and tightening nut cooperation, and is heat-treated, it is pre- to form slip casting
Stress anchor pole fastening end；Upper several plasma discharge holes are processed on the slip casting prestressed anchor body of rod again, it is desirable that plasma discharge hole equidistant placement.
In order to enhance the frictional force of the slip casting prestressed anchor body of rod and drilling, in the pressure processing of slip casting prestressed anchor body of rod upper roller
Circle-arc screw-thread.
The application method of above-mentioned mining slip casting prestressed anchor, which is characterized in that bolthole is beaten in roadway surrounding rock first, to
Foot of hole is packed into Anchor Agent powder stick, and mining slip casting prestressed anchor is fitted into drilling, makes its rotation with jumbolter drive,
The anchoring end edge precession side of slip casting prestressed anchor is stirred mixing to Anchor Agent powder stick, consolidates anchored end after Anchor Agent solidification
Due to foot of hole；After reaching certain anchoring strength, then in aperture stop grouting plug is installed, the slip casting prestressed anchor outside drilling
Pallet and tightening nut are installed on fastening end, applies the prestressing force of design by tightening nut, the tunnel surface newly excavated is carried
For effective preliminary bracing intensity；When needing slip casting, slip casting prestressed anchor fastening end is accessed to the grouting valve of grouting equipment
On, directly it is breaking surrounding rock slip casting.
The invention has the advantages that the mining slip casting prestressed anchor made of this method, can provide and existing spiral shell
The identical prestressing force of line steel anchor rod provides effective supporting intensity to the tunnel surface newly excavated, and can be when needing slip casting
The direct slip casting of grouting valve is accessed, the secondary construction of grouted anchor bar is saved, substantially increases roadway support efficiency and economic benefit.
And when roll-in processing above circle-arc screw-thread on tube body, the frictional force of anchor pole and drilling can be enhanced, enhance full borehole anchorage
Effect.
Description of the drawings
Fig. 1 is the front view for the mining slip casting prestressed anchor that the present invention makes；
Fig. 2 is the front view for the mining slip casting prestressed anchor of another kind that the present invention makes；
Fig. 3 is the usage state diagram of the mining slip casting prestressed anchor of the present invention.
Description of the drawings, 1- essences bundle seamless steel pipe, 2- anchored ends, the fastening ends 3-, 4- plasma discharges hole, 5- armature borings, 6- are screwed
Nut, 7- pallets, 8- stop grouting plugs, 9- Anchor Agent powder sticks, 10- grouting equipments, 11- grouting valves, 12- circle-arc screw-threads.
Specific implementation mode
With reference to attached drawing, embodiment of the present invention is further illustrated.
Mining slip casting prestressed anchor as shown in Figure 1, first, in accordance with the anchorage depth that tunnel is designed, is pressed in processing
The essence that corresponding length is intercepted according to anchorage depth pricks seamless steel pipe 1 as the slip casting prestressed anchor body of rod, and essence is pricked the one of seamless steel pipe 1
Side pressure is flat to be twisted into twisted shape, as slip casting prestressed anchor anchored end 2；Essence is pricked into 1 other end of seamless steel pipe again and processes upper and rotation
The fastening thread that tight nut 6 coordinates, and be heat-treated, form slip casting prestressed anchor fastening end 3；Again in slip casting prestressed anchor
Upper several plasma discharge holes 4 are processed on the body of rod, it is desirable that 4 equidistant placement of plasma discharge hole.
As shown in Fig. 2, in order to enhance the frictional force of the slip casting prestressed anchor body of rod and drilling, on the slip casting prestressed anchor body of rod
Upper circle-arc screw-thread 12 is processed in roll-in.
As shown in figure 3, the application method of above-mentioned mining slip casting prestressed anchor, beats armature boring 5 in roadway surrounding rock first,
It is packed into Anchor Agent powder stick 9 to 5 bottom of armature boring, mining slip casting prestressed anchor is fitted into armature boring 5, jumbolter is used
Drive makes its rotation, the anchored end 2 of slip casting prestressed anchor be stirred mixing, Anchor Agent to Anchor Agent powder stick 9 in precession
Anchored end 2 is fixed on 5 bottom of armature boring after solidification；After reaching certain anchoring strength, then in aperture stop grouting plug 8 is installed,
Pallet 7 and tightening nut 6 are installed on the slip casting prestressed anchor fastening end 3 outside drilling, design is applied by tightening nut 6
Prestressing force provides effective preliminary bracing intensity to the tunnel surface newly excavated；When needing slip casting, by slip casting prestressed anchor
Fastening end 3 is accessed on the grouting valve 11 of grouting equipment 10, is directly breaking surrounding rock slip casting.
Claims (3)
1. a kind of mining slip casting prestressed anchor, which is characterized in that it is processed by following methods：It is designed first, in accordance with tunnel
Anchorage depth, according to anchorage depth intercept corresponding length essence prick seamless steel pipe be used as the slip casting prestressed anchor body of rod, by essence bundle
One end of seamless steel pipe flattens and is twisted into twisted shape, as slip casting prestressed anchor anchored end；Essence is pricked into the seamless steel pipe other end again
The fastening thread coordinated with tightening nut in processing, and be heat-treated, form slip casting prestressed anchor fastening end；Again in slip casting
Upper several plasma discharge holes are processed on the prestressed anchor body of rod, it is desirable that plasma discharge hole equidistant placement.
2. mining slip casting prestressed anchor as described in claim 1, which is characterized in that in slip casting prestressed anchor body of rod upper roller pressure
It is machined with circle-arc screw-thread.
3. a kind of application method of mining slip casting prestressed anchor as claimed in claim 1 or 2, which is characterized in that in use,
Bolthole is beaten in roadway surrounding rock first, Anchor Agent powder stick is packed into foot of hole, mining slip casting prestressed anchor is packed into and is drilled
In, so that its rotation, the anchoring end edge precession side of slip casting prestressed anchor is stirred Anchor Agent powder stick with jumbolter drive
Anchored end is fixed on foot of hole by mixing after Anchor Agent solidification；After reaching certain anchoring strength, then installs in aperture and only starch
It fills in, installation pallet and tightening nut on the slip casting prestressed anchor fastening end outside drilling pass through tightening nut and apply design
Prestressing force provides effective preliminary bracing intensity to the tunnel surface newly excavated；When needing slip casting, by slip casting prestressed anchor
Fastening end is accessed on the grouting valve of grouting equipment, is directly breaking surrounding rock slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162431.6A CN108397219A (en) | 2018-02-27 | 2018-02-27 | Mining slip casting prestressed anchor and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162431.6A CN108397219A (en) | 2018-02-27 | 2018-02-27 | Mining slip casting prestressed anchor and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108397219A true CN108397219A (en) | 2018-08-14 |
Family
ID=63096651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810162431.6A Pending CN108397219A (en) | 2018-02-27 | 2018-02-27 | Mining slip casting prestressed anchor and its application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108397219A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595019A (en) * | 2019-01-24 | 2019-04-09 | 河南理工大学 | A kind of high-pressure slip-casting and anchor integrated anchor pole and its application method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200996296Y (en) * | 2007-01-11 | 2007-12-26 | 中国矿业大学 | High-strength decompressing slip-casting rockbolt |
| CN201103397Y (en) * | 2007-11-06 | 2008-08-20 | 中国矿业大学 | Yielding deformed steel bar slip-casting anchor bar |
| CN101358531A (en) * | 2007-08-04 | 2009-02-04 | 王光平 | Front anchor and post pier type extruding sealing grouting bolt |
| CN205243543U (en) * | 2015-11-19 | 2016-05-18 | 中国矿业大学(北京) | Flexible slip casting stock of prestressing force |
| CN205400775U (en) * | 2016-03-01 | 2016-07-27 | 山东科技大学 | Prestressing force slip casting stock |
| CN205475223U (en) * | 2016-01-11 | 2016-08-17 | 昆明理工大学 | High prestressed anchorage pole of area inflation cover |
| CN205955761U (en) * | 2016-08-28 | 2017-02-15 | 湖北捷丰科技股份有限公司 | Not fragile self -drilling cavity slip casting stock |
| CN206092038U (en) * | 2016-10-11 | 2017-04-12 | 贵州理工学院 | Slip casting anchor bar |
-
2018
- 2018-02-27 CN CN201810162431.6A patent/CN108397219A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200996296Y (en) * | 2007-01-11 | 2007-12-26 | 中国矿业大学 | High-strength decompressing slip-casting rockbolt |
| CN101358531A (en) * | 2007-08-04 | 2009-02-04 | 王光平 | Front anchor and post pier type extruding sealing grouting bolt |
| CN201103397Y (en) * | 2007-11-06 | 2008-08-20 | 中国矿业大学 | Yielding deformed steel bar slip-casting anchor bar |
| CN205243543U (en) * | 2015-11-19 | 2016-05-18 | 中国矿业大学(北京) | Flexible slip casting stock of prestressing force |
| CN205475223U (en) * | 2016-01-11 | 2016-08-17 | 昆明理工大学 | High prestressed anchorage pole of area inflation cover |
| CN205400775U (en) * | 2016-03-01 | 2016-07-27 | 山东科技大学 | Prestressing force slip casting stock |
| CN205955761U (en) * | 2016-08-28 | 2017-02-15 | 湖北捷丰科技股份有限公司 | Not fragile self -drilling cavity slip casting stock |
| CN206092038U (en) * | 2016-10-11 | 2017-04-12 | 贵州理工学院 | Slip casting anchor bar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595019A (en) * | 2019-01-24 | 2019-04-09 | 河南理工大学 | A kind of high-pressure slip-casting and anchor integrated anchor pole and its application method |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180814 |
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| RJ01 | Rejection of invention patent application after publication |