CN104790994B - Rockbolt stress state rapid evaluation device and application process thereof - Google Patents
Rockbolt stress state rapid evaluation device and application process thereof Download PDFInfo
- Publication number
- CN104790994B CN104790994B CN201510049482.4A CN201510049482A CN104790994B CN 104790994 B CN104790994 B CN 104790994B CN 201510049482 A CN201510049482 A CN 201510049482A CN 104790994 B CN104790994 B CN 104790994B
- Authority
- CN
- China
- Prior art keywords
- enamel coating
- foam metal
- metal plate
- anchor pole
- avalanche
- 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.)
- Expired - Fee Related
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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
- E21D21/02—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection having means for indicating tension
Abstract
The invention discloses a kind of rockbolt stress state rapid evaluation device, it is characterised in that specifically include that foam metal plate and enamel coating；Described foam metal plate, material is porous foam metal material；Described enamel coating, applies the uper side surface at foam metal plate；When anchor pole is installed, said apparatus is arranged between the pallet of anchor pole and nut, along with rockbolt stress is gradually increased, the most gradually avalanche of enamel coating on foam metal plate, avalanche range size according to enamel coating, quickly determining the stress of anchor pole, enamel coating avalanche scope is the biggest, and rockbolt stress is the biggest.The present invention utilizes the deformation characteristic of foam metal plate, the avalanche scope of rockbolt stress state with enamel coating is connected, by observing the stress that can judge anchor pole quickly, intuitively, it is provided that a kind of suspension roof support effect fast evaluation method being applicable to engineering site.
Description
Technical field
The present invention relates to underground engineering anchor structure health detection field, a kind of device for rapid evaluation rockbolt stress state and application process thereof.
Background technology
In recent years, anchor pole obtains a wide range of applications in underground engineering support field, has played important function for reducing support cost and minimizing accident.Owing to anchor pole is embedded in inside country rock, belonging to concealed structure, its Gernral Check-up and support action evaluate more difficulty.In order to assess support action and the health status of anchor pole, typically using anchor axial force as important evaluation index, but the measurement of anchor axial force is the most extremely difficult.The anchor axial force measuring method used the most both at home and abroad specifically includes that strain measurement method, pressure transducer measurement method and type vibration wire anchor ergometer.
Strain measurement method refers to before rockbolt installation, axially lays foil gauge or fiber grating at anchor pole, produces certain deformation after rockbolt stress, can measure the axial strain of anchor pole, according to the axle power of the strain calculation anchor pole recorded.The foil gauge and the fiber grating that use in this method easily damage, and require higher to surrounding, and measurement result is unstable, and measurement result is typically only as reference.It addition, fiber grating strain measurement system cost is higher.
Pressure transducer measurement method refers to install a pressure transducer at anchor rod pallet board in advance, is directly measured anchor axial force by pressure transducer.This method certainty of measurement can ensure that, but relatively costly, and the cost of single pressure sensor reaches unit up to ten thousand, can cause waste greatly if do not recycled, anchor pole then can be caused if recovery to lose efficacy, threaten engineering safety.
First bolt deformation is passed to vibratory string by type vibration wire anchor ergometer, thus changes the frequency of vibration of vibratory string.Can be obtained the deformation of vibratory string by vibratory string frequency detecting, and then obtain the deformation of anchor pole, and then try to achieve the axle power of anchor pole.This method needs to be welded on anchor pole at the two ends of vibratory string in advance, not only operates complexity, and welding quality is difficult to ensure that, but also considerably increases the installation difficulty of anchor pole.
Summary of the invention
It is an object of the invention to provide a kind of device for rapid evaluation rockbolt stress state and application process thereof, its technical solution is:
A kind of rockbolt stress state rapid evaluation device, it is characterised in that specifically include that foam metal plate and enamel coating；Described foam metal plate, material is porous foam metal material, generally slab construction, and shape is square or circular, and its center is provided with circular opening, and anchor pole can pass from this hole；Described enamel coating, applies the uper side surface at foam metal plate, and the equidistant annulus of enamel coating surface configuration or graduation mark etc., for quickly judging the pattern of the spacing of any point and central point on foam metal plate.
The application process of the present invention is:
When 1. anchor pole being installed, above-mentioned rockbolt stress state rapid evaluation device is arranged between the pallet of anchor pole and nut, then clamp nut；
2. being gradually increased along with rockbolt stress, the foam metal plate pressurized near nut starts deformation, and deformed region the most gradually extends；In the process, the enamel coating the most gradually avalanche on foam metal plate；
3. according to the avalanche scope of enamel coating, the stress of anchor pole is quickly determined, according to being: enamel coating avalanche scope is the biggest, and rockbolt stress is the biggest.
The ultimate principle of the present invention is: utilize the deformation characteristic of foam metal plate, the avalanche scope of rockbolt stress state with enamel coating is connected, by observing the stress that can judge anchor pole quickly, intuitively, it is provided that a kind of suspension roof support effect fast evaluation method being applicable to engineering site.
Accompanying drawing explanation
The invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings:
Fig. 1 is rockbolt stress state rapid evaluation device of the present invention and the principle schematic of application process thereof；
Fig. 2 is a kind of typical case's pattern of enamel coating surface configuration of the present invention.
Detailed description of the invention
In conjunction with accompanying drawing 1, a kind of rockbolt stress state rapid evaluation device, it is characterised in that specifically include that foam metal plate 1 and enamel coating 2；Described foam metal plate 1, material is porous foam metal material, generally slab construction, and shape is square or circular, and its center is provided with circular opening, and anchor pole a can pass from this hole；Described enamel coating 2, applies the uper side surface at foam metal plate；As in figure 2 it is shown, enamel coating surface configuration equidistant annulus pattern, for quickly judging enamel coating avalanche range size.
The application process of the present invention is:
When 1. anchor pole a being installed, above-mentioned rockbolt stress state rapid evaluation device is arranged between the pallet b of anchor pole and nut c, then clamp nut c；
2. being gradually increased along with rockbolt stress, the foam metal plate pressurized near nut c starts deformation, and deformed region the most gradually extends；In the process, the enamel coating the most gradually avalanche on foam metal plate；
3. according to the avalanche scope of enamel coating, the stress of anchor pole can quickly be determined, according to being: enamel coating avalanche scope is the biggest, and rockbolt stress is the biggest.
Embodiment described above, the simply one of the present invention more preferably specific embodiment, the usual variations and alternatives that those skilled in the art is carried out in the range of technical solution of the present invention all should comprise within the scope of the present invention.
Claims (2)
1. a rockbolt stress state rapid evaluation device, it is characterised in that specifically include that foam metal plate and enamel coating, be arranged on
Between pallet and the nut of anchor pole；Described foam metal plate, material is porous foam metal material, generally slab construction,
Shape is square or circular, and its center is provided with circular opening, and anchor pole can pass from this hole；Described enamel coating, applies
The uper side surface of foam metal plate, the equidistant annulus of enamel coating surface configuration or graduation mark pattern, along with rockbolt stress gradually increases
Add, the most gradually avalanche of the enamel coating on foam metal plate, according to the avalanche scope of enamel coating, quickly determine anchor pole
Stress.
2. the application process of rockbolt stress state rapid evaluation device as claimed in claim 1, it is characterised in that comprise the following steps:
When 1. anchor pole being installed, above-mentioned rockbolt stress state rapid evaluation device is arranged between the pallet of anchor pole and nut, then
Clamp nut；
2. being gradually increased along with rockbolt stress, the foam metal plate pressurized near nut starts deformation, and deformed region is laterally
Gradually extend；In the process, the enamel coating the most gradually avalanche on foam metal plate；
3. according to the avalanche scope of enamel coating, the stress of anchor pole is quickly determined, according to being: enamel coating avalanche scope is more
Greatly, rockbolt stress is the biggest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049482.4A CN104790994B (en) | 2015-02-01 | 2015-02-01 | Rockbolt stress state rapid evaluation device and application process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049482.4A CN104790994B (en) | 2015-02-01 | 2015-02-01 | Rockbolt stress state rapid evaluation device and application process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104790994A CN104790994A (en) | 2015-07-22 |
| CN104790994B true CN104790994B (en) | 2017-01-04 |
Family
ID=53556128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510049482.4A Expired - Fee Related CN104790994B (en) | 2015-02-01 | 2015-02-01 | Rockbolt stress state rapid evaluation device and application process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104790994B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401628A (en) * | 2016-12-02 | 2017-02-15 | 大连理工大学 | Tightness degree test anchor rod and tightness degree test system |
| CN106437803A (en) * | 2016-12-02 | 2017-02-22 | 大连理工大学 | Anchor rod and anchor rod stressing tester |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3726098A1 (en) * | 1987-08-06 | 1989-02-16 | Dyckerhoff & Widmann Ag | ANCHORING DEVICE FOR THE TIE LINK OF AN ANCHOR, ESPECIALLY A ROCK ANCHOR |
| FR2841273B1 (en) * | 2002-06-20 | 2005-04-15 | Astare | DEVICE FOR PLACING A PRECONTROLLER ON A SCELLEE ANCHORING ROD |
| CN200952965Y (en) * | 2006-03-22 | 2007-09-26 | 贾喜荣 | Anchorage cable and roofbolt pretightening force monitor |
| CN103016037B (en) * | 2012-12-28 | 2015-01-07 | 山东大学 | Novel yielding anchor rod elastic round tray for displaying pre-tightening force and use method thereof |
| CN104296896B (en) * | 2014-11-04 | 2016-09-07 | 山东科技大学 | Analog simulation test direct-reading anchor ergometer method of work |
| CN204457829U (en) * | 2015-02-01 | 2015-07-08 | 山东科技大学 | Rockbolt stress state rapid evaluation device |
-
2015
- 2015-02-01 CN CN201510049482.4A patent/CN104790994B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104790994A (en) | 2015-07-22 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20170201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |