CN115126518A - Resistance-increasing energy-absorbing anchor rod - Google Patents
Resistance-increasing energy-absorbing anchor rod Download PDFInfo
- Publication number
- CN115126518A CN115126518A CN202210884989.1A CN202210884989A CN115126518A CN 115126518 A CN115126518 A CN 115126518A CN 202210884989 A CN202210884989 A CN 202210884989A CN 115126518 A CN115126518 A CN 115126518A
- Authority
- CN
- China
- Prior art keywords
- resistance
- anchoring element
- stage
- increasing energy
- absorbing
- 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.)
- Granted
Links
- 238000004873 anchoring Methods 0.000 claims abstract description 160
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 14
- 210000001503 joint Anatomy 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 5
- 239000011435 rock Substances 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 8
- 230000001808 coupling effect Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
Images
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
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- 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
- E21D21/0046—Anchoring-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
-
- 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
- E21D21/008—Anchoring or tensioning means
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)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A resistance-increasing energy-absorbing anchor rod comprises a first-stage anchoring element, a second-stage anchoring element, a third-stage anchoring element, a resistance-increasing energy-absorbing element, a rod body, a nut and a tray; the first-stage anchoring element, the second-stage anchoring element, the resistance-increasing energy-absorbing element and the third-stage anchoring element are sequentially arranged at the drilling insertion end of the rod body; the second-stage anchoring element is fixedly matched with the rod body through a nut; and the third-stage anchoring element is in limit fit with the rod body through a nut. The second-stage and third-stage anchoring elements are matched with the resistance-increasing energy-absorbing element, so that the supporting requirements of various severe working condition conditions can be met; the resistance-increasing energy-absorbing element can greatly improve the deformation capacity of the anchor rod while ensuring high anchoring force so as to adapt to disasters such as large deformation and rock burst of high-stress rock mass; by releasing the coupling effect between the anchoring agent and the rod body and establishing the strength relation of the anchor rod interface, the purposes of structure resistance increasing slippage and large deformation of the rod body material can be realized; the invention also has the characteristics of simple structure, convenient use and low price.
Description
Technical Field
The invention belongs to the technical field of mine roadway and geotechnical engineering support, and particularly relates to a resistance-increasing energy-absorbing anchor rod.
Background
The anchor rod support has the advantages of simple structure, convenient construction, low cost and the like, and is widely applied to the fields of mining, civil engineering, water conservancy and hydropower engineering and the like so as to maintain the stability of engineering and control the relative movement and deformation of rock mass. Along with the continuous increase of deep engineering construction and resource exploitation depth, in special geological and complex stress environments, engineering disasters such as rock burst, large deformation of surrounding rocks, tunnel bottom bulging, rib spalling, roof collapse and the like frequently occur, and serious threats are formed on stability of underground engineering and safety of personnel and equipment.
The phenomenon that the supporting element fails due to the complex environment of deep engineering is greatly increased, and the traditional anchor rod is increasingly difficult to adapt to the supporting requirement of deep rock mass. For example, the full-length anchoring deformed steel bar anchor rod is easy to break and fail in the large deformation process of the surrounding rock due to large rigidity and small deformation capacity; the pipe seam anchor rod has the defects of low anchoring force and easy slippage; the mechanical anchor rod of the end anchor is difficult to ensure the stability of surrounding rocks due to large resistance fluctuation. Therefore, the deep engineering bolting member needs to have large deformation capacity and high anchoring force to control large deformation of rock mass and dynamic impact disasters.
Therefore, the Chinese patent application with the publication number of CN108547649A discloses a large-deformation energy-absorbing anchor rod with a simplified structure, which increases the deformation capacity of the anchor rod by adding an anchoring agent isolation sleeve on a common screw-thread steel anchor rod; chinese patent application publication No. CN102868088A discloses a high-strength deformation anchor rod, which achieves anchoring effect through a rough rod body section and achieves elongation deformation through a smooth rod body section; the Chinese patent application with the publication number of CN101858225A discloses a constant-resistance large-deformation anchor rod which is made of a novel material and realizes large deformation and constant-resistance anchoring force through a thread structure between a rod body and a constant-resistance device; chinese patent application publication No. CN106869977A discloses a screw-type constant-resistance anchor rod, which provides deformation displacement through a screw-type lock and a ball bearing; chinese patent application publication No. CN102086770A discloses a self-expanding anchor rod with a large deformation cone resistance type friction sleeve, which utilizes the mutual sliding of a friction groove on the inner wall of the friction sleeve and a cone tooth friction body on the rod body to realize the large deformation characteristic.
However, in the technical solution of the above patent application, although the deformation capacity of the anchor rod body is fully exerted by releasing the bonding effect of the cement mortar and the resin anchoring agent, the deformation amount of the anchor rod is limited by the rod body material, and it is still difficult to realize large deformation, and the energy-absorbing anchor rod adopting various metal structures to realize large deformation has the defects of generally low anchoring force, complex structure, difficult manufacturing, increased supporting cost and the like, and thus is not beneficial to popularization and application in practical engineering.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a resistance-increasing energy-absorbing anchor rod which can meet the supporting requirements under various severe working conditions by the instant anchoring of a first-stage anchoring element and the matching of a second-stage anchoring element and a third-stage anchoring element with the resistance-increasing energy-absorbing element; the resistance-increasing energy-absorbing element can greatly improve the deformation capacity of the anchor rod while ensuring high anchoring force so as to adapt to disasters such as large deformation, rock burst and the like of a high-stress rock body; the release of the coupling effect between the anchoring agent and the rod body can be realized through the third-stage anchoring element, and meanwhile, the purposes of structure resistance-increasing slippage and large deformation of the rod body material can be realized through establishing the relationship of the interface strength of the anchor rod; the invention also has the characteristics of simple structure, convenient use and low cost, and the rod body is prepared by adopting the traditional material, so that the aims of large deformation and high working resistance can be realized, and the invention is more beneficial to popularization and application in practical engineering.
In order to achieve the purpose, the invention adopts the following technical scheme: a resistance-increasing energy-absorbing anchor rod comprises a first-stage anchoring element, a second-stage anchoring element, a third-stage anchoring element, a resistance-increasing energy-absorbing element, a rod body, a nut and a tray; the first-stage anchoring element, the second-stage anchoring element, the resistance-increasing energy-absorbing element and the third-stage anchoring element are sequentially arranged at the drilling insertion end of the rod body; the second-stage anchoring element is fixedly matched with the rod body through a nut; the third-stage anchoring element is in limit fit with the rod body through a nut; the tray is arranged at the exposed end of the rod body and is fixedly matched with the rod body through a nut.
The first-stage anchoring element is an expanding shell anchor head, a quick resin cartridge or a quick setting cement cartridge.
And the second-stage anchoring element and the third-stage anchoring element both adopt hollow anchoring cartridges.
The hollow anchoring cartridge comprises a hollow cartridge cylinder and an anchoring agent; the hollow cartridge cylinder adopts a double-layer structure with an opening at one side, and an annular rubber sealing cover is arranged at the annular opening of the hollow cartridge cylinder; the anchoring agent is filled in an annular space between the inner layer cylinder wall and the outer layer cylinder wall of the hollow cartridge cylinder.
The wall of the hollow cartridge cylinder is uniformly provided with a plurality of water permeable holes, and the outer surface of the hollow cartridge cylinder is stuck with a water-absorbing sponge coating layer.
The resistance-increasing energy-absorbing element adopts a seamless conical tube or a cylindrical corrugated tube.
When the resistance-increasing energy-absorbing element adopts a seamless conical tube, the large-diameter end of the seamless conical tube is in butt joint with the second-stage anchoring element, the inner diameter of the tube orifice of the large-diameter end of the seamless conical tube is larger than the outer diameter of the second-stage anchoring element, the small-diameter end of the seamless conical tube is in butt joint with the third-stage anchoring element, and the outer diameter of the tube orifice of the small-diameter end of the seamless conical tube is smaller than the outer diameter of the third-stage anchoring element.
When the resistance-increasing energy-absorbing element adopts a cylindrical corrugated pipe, one end of the cylindrical corrugated pipe is in butt joint with the second-stage anchoring element, the other end of the cylindrical corrugated pipe is in butt joint with the third-stage anchoring element, and the outer diameter of the pipe orifice of the cylindrical corrugated pipe is smaller than the outer diameters of the second-stage anchoring element and the third-stage anchoring element.
The friction between the third anchoring element and the inner wall of the borehole is denoted F 1 The friction between the third stage of anchoring element and the rod is denoted F 2 And F is 1 ≥F 2 。
The resistance of the second-stage anchoring element acting on the resistance-increasing energy-absorbing element to deform the resistance-increasing energy-absorbing element is recorded as F 3 And the ultimate drawing strength of the rod body is marked as F 4 And F is 1 ＞F 3 ＞F 4 。
The invention has the beneficial effects that:
the resistance-increasing energy-absorbing anchor rod disclosed by the invention can meet the supporting requirements under various severe working conditions by the instant anchoring of the first-stage anchoring element and the matching of the second-stage anchoring element and the third-stage anchoring element with the resistance-increasing energy-absorbing element; the resistance-increasing energy-absorbing element can greatly improve the deformability of the anchor rod while ensuring high anchoring force so as to adapt to disasters such as large deformation, rock burst and the like of high-stress rock mass; meanwhile, the coupling effect between the anchoring agent and the rod body can be relieved through the third-stage anchoring element, and the aims of structure resistance-increasing slippage and large deformation of the rod body material can be fulfilled by establishing the strength relation of the anchor rod interface; the invention also has the characteristics of simple structure, convenient use and low cost, and the rod body is prepared by adopting the traditional material, so that the aims of large deformation and high working resistance can be realized, and the invention is more beneficial to popularization and application in practical engineering.
Drawings
Fig. 1 is a schematic structural view of a resistance-increasing energy-absorbing anchor rod (when a first-stage anchoring element adopts a shell-expanding anchor head, and a resistance-increasing energy-absorbing element adopts a seamless conical pipe);
FIG. 2 is a schematic structural view of a resistance-increasing energy-absorbing anchor rod (when a first-stage anchoring element adopts a shell-expanding anchor head, and a resistance-increasing energy-absorbing element adopts a cylindrical corrugated pipe) according to the present invention;
FIG. 3 is a schematic view of a hollow anchoring cartridge for use with the second/third stage anchoring elements of the present invention;
in the figure, 1-a first-stage anchoring element, 2-a second-stage anchoring element, 3-a third-stage anchoring element, 4-a resistance-increasing energy-absorbing element, 5-a rod body, 6-a nut, 7-a tray, 8-a hollow cartridge cylinder, 9-an anchoring agent, 10-an annular rubber sealing cover, 11-a water permeable hole and 12-a water-absorbing sponge coating layer.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1 to 3, a resistance-increasing energy-absorbing anchor rod includes a first-stage anchor element 1, a second-stage anchor element 2, a third-stage anchor element 3, a resistance-increasing energy-absorbing element 4, a rod body 5, a nut 6 and a tray 7; the first-stage anchoring element 1, the second-stage anchoring element 2, the resistance-increasing energy-absorbing element 4 and the third-stage anchoring element 3 are sequentially arranged at the drilling insertion end of the rod body 5; the second-stage anchoring element 2 is fixedly matched with the rod body 5 through a nut 6; the third-stage anchoring element 3 is in limit fit with the rod body 5 through a nut 6; the tray 7 is arranged at the exposed end of the rod body 5, and the tray 7 is fixedly matched with the rod body 5 through a nut 6.
In the embodiment, the rod body 5 is made of high-strength rib-free deformed steel, the diameter of the rod body 5 is 20mm, and the length of the rod body 5 is 2500 mm; the nut 6 is an outer hexagon nut, the maximum outer diameter of the nut 6 is 36mm, and the axial thickness of the nut 6 is 45 mm; tray 7 adopts the steel sheet to make and the shape is square, and the length of side of tray 7 is 200mm, and the thickness of tray 7 is 5mm, and the central round hole diameter of tray 7 is 25 mm.
The first-stage anchoring element 1 is selected from an expanding shell anchor head, a quick resin cartridge or a quick setting cement cartridge.
In this embodiment, the first-stage anchoring element 1 adopts a shell-expanding anchor head, the shell-expanding anchor head needs to provide 3-5 tons of anchoring force in the initial stage of support, the outer diameter of a shell piece of the shell-expanding anchor head is 40mm, the length of the shell piece of the shell-expanding anchor head is 60mm, the outer diameter of the expanded shell piece can reach 43-45 mm, the outer diameter of a wedge of the shell-expanding anchor head is 32mm, and the wedge is screwed on the rod body 5. If first order anchor component 1 adopts quick resin cartridge or rapid hardening cement cartridge, can send into quick resin cartridge or rapid hardening cement cartridge into the drilling bottom earlier, later insert the body of rod 5 in the quick resin cartridge or the rapid hardening cement cartridge of drilling bottom again, treat the cartridge solidification back, also need provide 3 ~ 5 tons of anchor power at the preliminary stage of strutting.
The second-stage anchoring element 2 and the third-stage anchoring element 3 both adopt hollow anchoring cartridges.
The hollow anchoring cartridge comprises a hollow cartridge cylinder 8 and an anchoring agent 9; the hollow cartridge cylinder 8 is of a double-layer structure with an opening at one side, and an annular rubber sealing cover 10 is arranged at the annular opening of the hollow cartridge cylinder 8; the anchoring agent 9 is filled in an annular space between the inner layer cylinder wall and the outer layer cylinder wall of the hollow cartridge cylinder 8.
In this embodiment, the outer diameter of the hollow cartridge cylinder 8 is 40mm, the inner diameter of the hollow cartridge cylinder 8 is 23mm, the length of the hollow cartridge cylinder 8 is 150mm, the wall thickness of the inner layer cylinder wall and the outer layer cylinder wall of the hollow cartridge cylinder 8 are both 0.5mm, and the wall thickness of the closed end of the hollow cartridge cylinder 13 is 3 mm; the outer diameter of the annular rubber sealing cover 10 is 1mm smaller than the inner diameter of the outer layer cylinder wall of the hollow cartridge cylinder 8, the inner diameter of the annular rubber sealing cover 10 is 1mm larger than the outer diameter of the inner layer cylinder wall of the hollow cartridge cylinder 8, and the thickness of the annular rubber sealing cover 10 is 3 mm; the anchoring agent 9 can be self-expanding anchoring agent or quick-drying cement anchoring agent, when the anchoring agent 9 is self-expanding anchoring agent, the self-expanding anchoring agent is prepared from 80% of calcium oxide, 5% of water absorbent and 15% of cementing material, and the filling density of the anchoring agent 9 in the annular space of the hollow cartridge cylinder 8 is 1.5g/cm 3 。
A plurality of water permeable holes 11 are uniformly arranged on the wall of the hollow cartridge cylinder 8, and a water-absorbing sponge coating layer 12 is adhered on the outer surface of the hollow cartridge cylinder.
In this embodiment, the water permeable holes 11 are circular holes with a diameter of 1 mm.
The resistance-increasing energy-absorbing element 4 is a seamless conical tube or a cylindrical corrugated tube.
When the resistance-increasing energy-absorbing element 4 is a seamless conical tube, the large-diameter end of the seamless conical tube is in butt joint with the second-stage anchoring element 2, the inner diameter of the tube orifice of the large-diameter end of the seamless conical tube is larger than the outer diameter of the second-stage anchoring element 2, the small-diameter end of the seamless conical tube is in butt joint with the third-stage anchoring element 3, and the outer diameter of the tube orifice of the small-diameter end of the seamless conical tube is smaller than the outer diameter of the third-stage anchoring element 3.
In the embodiment, the length of the seamless conical tube is 350mm, the wall thickness of the seamless conical tube is 1.5mm, the taper is 0.3-1 degrees, the inner diameter of the large-diameter end orifice of the seamless conical tube is 42mm, and the outer diameter of the small-diameter end orifice of the seamless conical tube is 38 mm.
When the resistance-increasing energy-absorbing element 4 is a cylindrical corrugated pipe, one end of the cylindrical corrugated pipe is in butt joint with the second-stage anchoring element 2, the other end of the cylindrical corrugated pipe is in butt joint with the third-stage anchoring element 3, and the outer diameter of a pipe orifice of the cylindrical corrugated pipe is smaller than the outer diameters of the second-stage anchoring element 2 and the third-stage anchoring element 3.
In this embodiment, the length of the cylindrical corrugated pipe is 350mm, the wall thickness of the cylindrical corrugated pipe is 1.5mm, and the outer diameter of the pipe orifice of the cylindrical corrugated pipe is 38 mm.
The friction between the third anchoring element 3 and the inner wall of the borehole is denoted F 1 The friction between the third stage anchoring element 3 and the rod 5 is denoted F 2 And F is 1 ≥F 2 。
The resistance of the second-stage anchoring element 2 acting on the resistance-increasing energy-absorbing element 4 to deform is marked as F 3 The ultimate pull-out strength of the rod body 5 is marked as F 4 And F is 1 ＞F 3 ＞F 4 。
The one-time use process of the present invention is described below with reference to the accompanying drawings:
and (3) processing a drill hole on the surrounding rock, wherein the diameter of the drill hole is 42mm, the depth of the drill hole is 2400mm, the drill hole is 100mm shorter than the length of the rod body 5, and the longer part is just used as the exposed end of the rod body 5 and used for installing the tray 7 and the nut 6 for fixing the tray 7.
A rod body 5 with the length of 2500mm is prepared, a nut 6 is installed on the rod body 5 at the position of 1100mm from the bottom side of a hole, then four hollow anchoring cartridges are selected to be sleeved into the rod body 5 from the bottom side of the hole in sequence until the first sleeved hollow anchoring cartridge abuts against the nut 6 at the position of 1100mm, and the four hollow anchoring cartridges are used as a third-stage anchoring element 3.
After the third-stage anchoring element 3 is installed, the seamless conical tube is selected to be sleeved into the rod body 5 from the bottom side of the hole until the small-diameter end mouth of the seamless conical tube abuts against the third-stage anchoring element 3, and therefore the installation of the resistance-increasing energy-absorbing element 4 is completed.
After the resistance-increasing energy-absorbing element 4 is installed, a nut 6 is selected to sleeve a rod body 5 from the hole bottom side until the nut 6 is positioned at the large-diameter end pipe orifice of the seamless conical pipe, then two hollow anchoring cartridges are alternatively selected to sleeve the rod body 5 from the hole bottom side in sequence until the hollow anchoring cartridges are sleeved in first and abut against the nut 6 at the large-diameter end pipe orifice of the seamless conical pipe, then a nut 6 is selected to sleeve the rod body 5 from the hole bottom side until the nut 6 is screwed and abuts against the hollow anchoring cartridges sleeved in later, and finally the two hollow anchoring cartridges in the middle are fixed through the front nut 6 and the rear nut 6, so that the installation of the second-stage anchoring element 2 is completed.
After the second-stage anchoring element 2 is installed, the prepared expansion shell anchor head is screwed to the end part of the hole bottom of the rod body 5, so that the installation of the first-stage anchoring element 1 is completed, and at the moment, a free section of 1000mm remains on the rod body 5.
Before inserting the assembled anchor rod into the drilled hole, peeling off the plastic packaging vacuum film on the outermost layer of the hollow anchoring explosive roll of the second-level anchoring element 2 and the third-level anchoring element 3 to expose the water-absorbing sponge coating layer 12, then soaking the whole anchor rod in water for about 15min, and taking out the anchor rod from the water when no bubbles or only a small amount of bubbles emerge from the hollow anchoring explosive roll.
After the preparation work is completed, the anchor rod is installed on the anchor rod installing machine, the anchor rod is pressed into the prepared surrounding rock drilling hole by the anchor rod installing machine, the rotating rod body 5 can drive the wedge body of the expansion shell anchor head to move axially, the wedge body moving axially can expand the shell piece of the expansion shell anchor head outwards, and therefore the initial anchoring force is formed through the expanded shell piece and the drilling hole wall.
After the rod body 5 is installed, the tray 7 is installed at the exposed end of the rod body 5, then the nut 6 is screwed in until the nut 6 is screwed in, the tray 7 is firmly pressed on the surface of the surrounding rock, and the installation of the whole anchor rod is completed.
After the anchor rod is installed on site, the hollow anchoring cartridges of the second-stage anchoring element 2 and the third-stage anchoring element 3 start hydration reaction and exert effects after 30 minutes, the hollow anchoring cartridges are solidified and expanded through the hydration reaction of the internal anchoring agent 9, and radial expansive force is generated at the same time, so that the second-stage anchoring element 2 and the third-stage anchoring element 3 are tightly anchored with surrounding rocks.
When the surrounding rock is deformed, the third-stage anchoring element 3 and the hole wall of the surrounding rock drill hole are still in a tight anchoring state, the rod body 5 and the third-stage anchoring element 3 can slide relatively, the second-stage anchoring element 2 can follow the rod body 5, the distance between the second-stage anchoring element 2 and the third-stage anchoring element 3 is reduced, the moving second-stage anchoring element 2 can gradually invade into the seamless conical pipe, the seamless conical pipe is forced to expand and deform, resistance-increasing energy absorption is achieved, large deformation of the anchor rod is finally guaranteed, and meanwhile high anchoring force of the anchor rod is guaranteed.
Similarly, when the resistance-increasing energy-absorbing element 4 is a cylindrical corrugated pipe, the moving second-stage anchoring element 2 can gradually extrude the cylindrical corrugated pipe in the axial direction to force the cylindrical corrugated pipe to generate compression deformation, so that resistance-increasing energy-absorbing is realized, the large deformation of the anchor rod is finally ensured, and meanwhile, the high anchoring force of the anchor rod is ensured.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are included in the claims of the present application.
Claims (10)
1. The utility model provides a resistance-increasing energy-absorbing stock which characterized in that: the device comprises a first-stage anchoring element, a second-stage anchoring element, a third-stage anchoring element, a resistance-increasing energy-absorbing element, a rod body, a nut and a tray; the first-stage anchoring element, the second-stage anchoring element, the resistance-increasing energy-absorbing element and the third-stage anchoring element are sequentially arranged at the drilling insertion end of the rod body; the second-stage anchoring element is fixedly matched with the rod body through a nut; the third-stage anchoring element is in limit fit with the rod body through a nut; the tray is installed at the exposed end of the rod body and is fixedly matched with the rod body through a nut.
2. A resistance-increasing energy-absorbing anchor rod according to claim 1, wherein: the first-stage anchoring element is an expanding shell anchor head, a quick resin cartridge or a quick setting cement cartridge.
3. A resistance-increasing energy-absorbing anchor rod according to claim 1, wherein: and the second-stage anchoring element and the third-stage anchoring element both adopt hollow anchoring cartridges.
4. A resistance-increasing energy-absorbing anchor rod according to claim 3, wherein: the hollow anchoring cartridge comprises a hollow cartridge cylinder and an anchoring agent; the hollow cartridge cylinder adopts a double-layer structure with an opening at one side, and an annular rubber sealing cover is arranged at the annular opening of the hollow cartridge cylinder; the anchoring agent is filled in an annular space between the inner layer cylinder wall and the outer layer cylinder wall of the hollow cartridge cylinder.
5. A resistance-increasing energy-absorbing anchor rod according to claim 4, wherein: a plurality of water permeable holes are uniformly arranged on the wall of the hollow cartridge cylinder, and a water-absorbing sponge coating layer is adhered on the outer surface of the hollow cartridge cylinder.
6. A resistance-increasing energy-absorbing anchor rod as claimed in claim 1, wherein: the resistance-increasing energy-absorbing element adopts a seamless conical tube or a cylindrical corrugated tube.
7. A resistance-increasing energy-absorbing anchor rod according to claim 6, wherein: when the resistance-increasing energy-absorbing element adopts a seamless conical tube, the large-diameter end of the seamless conical tube is in butt joint with the second-stage anchoring element, the inner diameter of the tube orifice of the large-diameter end of the seamless conical tube is larger than the outer diameter of the second-stage anchoring element, the small-diameter end of the seamless conical tube is in butt joint with the third-stage anchoring element, and the outer diameter of the tube orifice of the small-diameter end of the seamless conical tube is smaller than the outer diameter of the third-stage anchoring element.
8. A resistance-increasing energy-absorbing anchor rod according to claim 6, wherein: when the resistance-increasing energy-absorbing element is a cylindrical corrugated pipe, one end of the cylindrical corrugated pipe is in butt joint with the second-stage anchoring element, the other end of the cylindrical corrugated pipe is in butt joint with the third-stage anchoring element, and the outer diameter of the pipe orifice of the cylindrical corrugated pipe is smaller than the outer diameters of the second-stage anchoring element and the third-stage anchoring element.
9. A resistance-increasing energy-absorbing anchor rod according to claim 1, wherein: the friction between the third anchoring element and the inner wall of the borehole is denoted F 1 The friction between the third level of anchoring element and the rod is denoted F 2 And F is 1 ≥F 2 。
10. A resistance-increasing energy-absorbing anchor rod according to claim 9, wherein: the resistance of the second-stage anchoring element acting on the resistance-increasing energy-absorbing element to deform the resistance-increasing energy-absorbing element is recorded as F 3 And the ultimate drawing strength of the rod body is marked as F 4 And F is 1 ＞F 3 ＞F 4 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210884989.1A CN115126518B (en) | 2022-07-26 | 2022-07-26 | Resistance-increasing energy-absorbing anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210884989.1A CN115126518B (en) | 2022-07-26 | 2022-07-26 | Resistance-increasing energy-absorbing anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115126518A true CN115126518A (en) | 2022-09-30 |
| CN115126518B CN115126518B (en) | 2023-09-01 |
Family
ID=83385555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210884989.1A Active CN115126518B (en) | 2022-07-26 | 2022-07-26 | Resistance-increasing energy-absorbing anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115126518B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202338350U (en) * | 2011-11-18 | 2012-07-18 | 山东科技大学 | Novel continuous resistance increasing deformation anchor rod |
| CN105822332A (en) * | 2016-05-05 | 2016-08-03 | 辽宁工程技术大学 | Mining abdication friction-type energy absorption and impact prevention anchor rod |
| 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 |
| CN108547649A (en) * | 2018-04-02 | 2018-09-18 | 东北大学 | A kind of simplified large deformation energy-absorption anchor rod of structure |
| CN110030025A (en) * | 2019-05-17 | 2019-07-19 | 东北大学 | Self-expansion type pipe seam anchor bar and its preparation and application for the big deformation of country rock |
| CN112196596A (en) * | 2020-10-15 | 2021-01-08 | 山东科技大学 | Grouting anchor rod cable combination beam for advanced support of deep broken surrounding rock and support method |
| CN113958353A (en) * | 2021-11-30 | 2022-01-21 | 东北大学 | Piston type self-expansion anchor rod |
-
2022
- 2022-07-26 CN CN202210884989.1A patent/CN115126518B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202338350U (en) * | 2011-11-18 | 2012-07-18 | 山东科技大学 | Novel continuous resistance increasing deformation anchor rod |
| CN105822332A (en) * | 2016-05-05 | 2016-08-03 | 辽宁工程技术大学 | Mining abdication friction-type energy absorption and impact prevention anchor rod |
| 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 |
| CN108547649A (en) * | 2018-04-02 | 2018-09-18 | 东北大学 | A kind of simplified large deformation energy-absorption anchor rod of structure |
| CN110030025A (en) * | 2019-05-17 | 2019-07-19 | 东北大学 | Self-expansion type pipe seam anchor bar and its preparation and application for the big deformation of country rock |
| CN112196596A (en) * | 2020-10-15 | 2021-01-08 | 山东科技大学 | Grouting anchor rod cable combination beam for advanced support of deep broken surrounding rock and support method |
| CN113958353A (en) * | 2021-11-30 | 2022-01-21 | 东北大学 | Piston type self-expansion anchor rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115126518B (en) | 2023-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109184765B (en) | Detachable hydraulic anchor rod capable of yielding and releasing energy in steady state and supporting method thereof | |
| CN109057840A (en) | Adaptive grouting and reinforcing anchor pole and its anchoring construction method under a kind of high stress | |
| CN107740410B (en) | Full-length prestressed anchorage support device and process capable of combining and expanding internal anchoring body | |
| CN109083668A (en) | A kind of grouting and reinforcing anchor pole suitable for high stress breaking surrounding rock supporting | |
| CN107829768B (en) | Large-deformation supporting device and process capable of blasting automatic expansion anchoring structure | |
| CN107130988B (en) | Liquid carbon dioxide blasting anti-reflection grouting composite anchor rod | |
| CN111720148B (en) | Section coal pillar self-anchoring opposite-pulling anti-scour anchor cable and using method thereof | |
| CN109751067B (en) | Method for improving pre-pulling force of anchor rod | |
| CN110030025B (en) | Self-expansion type pipe joint anchor rod for surrounding rock large deformation and preparation and use methods thereof | |
| CN112431626A (en) | Prestressed grouting anchor rod with hydraulic telescopic sleeve, grouting system and method | |
| CN111828067A (en) | Expansion anchoring bolt for controlling roadway surrounding rock and using method thereof | |
| CN109869173B (en) | Flexible anchor rod | |
| CZ305105B6 (en) | Expansion rock anchor | |
| CN201753606U (en) | Dual-purpose grouting pipe for deep and shallow holes | |
| CN210033494U (en) | Self-expansion type pipe seam anchor rod for large deformation of surrounding rock | |
| CN115126518A (en) | Resistance-increasing energy-absorbing anchor rod | |
| CN210194627U (en) | Hole wall guniting device | |
| CN112360530A (en) | Grouting anchor rod for geotechnical engineering construction | |
| CN214997749U (en) | Large-deformation prestress hydraulic expansion anchor rod | |
| CN107677167B (en) | Weak stratum prestress anchoring device capable of blasting, reaming and automatic filling and process | |
| CN113123817B (en) | Application method of large-deformation prestress hydraulic expansion anchor rod | |
| CN113931670A (en) | Combined grouting prestress large-deformation anchor rod and construction method thereof | |
| CN212003115U (en) | Dissolvable bridge plug | |
| CN113958353A (en) | Piston type self-expansion anchor rod | |
| CN112963188A (en) | Assembly type precession grouting anchor rod structure and using method thereof |
Legal Events
| 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |