CN111706375A - Anchor-grouting type flexible anchor rod - Google Patents
Anchor-grouting type flexible anchor rod Download PDFInfo
- Publication number
- CN111706375A CN111706375A CN202010655237.9A CN202010655237A CN111706375A CN 111706375 A CN111706375 A CN 111706375A CN 202010655237 A CN202010655237 A CN 202010655237A CN 111706375 A CN111706375 A CN 111706375A
- Authority
- CN
- China
- Prior art keywords
- grouting
- anchor
- anchor rod
- tray
- joint
- 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
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Classifications
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- 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
- E21D21/006—Anchoring-bolts made of cables or wires
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- 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
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- 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
-
- 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
- E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
-
- 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
- E21D21/008—Anchoring or tensioning means
-
- 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
- E21D21/0086—Bearing plates
Abstract
The invention relates to the technical field of anchor rod support of mines, tunnels and the like, and discloses an anchor-grouting type flexible anchor rod, in order to improve the support capability of the anchor rod, a fastening screw sleeve is sleeved at one end of a steel strand rod body, a nut is matched on the fastening screw sleeve, a pressure-yielding ring is sleeved at one side of the nut, a tray is arranged at one side of the pressure-yielding ring, the middle of the tray is hemispherical, grouting grooves are formed in two sides of the tray, a self-locking disc is connected to one side of the tray, a locking through hole is formed in the self-locking disc in a penetrating mode, and a grouting device is arranged at one side of the self-locking. The invention adopts the steel strand as the anchor rod body, has the advantages of high strength, large bearing capacity, light weight, flexibility, unlimited length, pressure relief and the like, can conveniently carry out grouting through the grouting device, really realizes the anchoring and grouting integrated construction, reduces the overhauling damage of the roadway, and provides a reliable solution for solving the roadway supporting problem of deep well high-ground pressure soft rock complex geological conditions.
Description
Technical Field
The invention relates to the technical field of anchor rod support of mines, tunnels and the like, in particular to an anchor-grouting type flexible anchor rod.
Background
The anchor rod is the most basic component of roadway support in the contemporary coal mine, can consolidate the surrounding rocks of the roadway together, make the surrounding rocks support oneself, the anchor rod is not merely used in the mine now, also is used in the engineering technology, carry on the body reinforcement to the side slope, tunnel, dam body.
Along with the increase of the mining depth of a mine, underground geological conditions become severe and complex, the ground pressure is continuously increased, tunnel surrounding rocks are deformed quickly and are difficult to support, the conventional anchor rod supporting technology is difficult to meet the supporting requirement of a high-ground-pressure tunnel, for example, anchor rod products used for supporting the coal mine tunnel are generally made of non-longitudinal rib threaded steel bars, the defects of low compressive strength, large weight, incapability of bending, high cost and the like exist, although flexible anchor rods made of steel stranded wires have the advantages of high strength, light weight, flexibility, no limitation on length and the like, when the flexible anchor rods are screwed up, the steel stranded wires are flexible, the torsion phenomenon occurs, so that the nuts cannot be screwed up, the rod bodies cannot generate certain pre-tightening force, the tunnel cannot be supported effectively and timely, meanwhile, the anchor rods cannot be grouted, the full-length anchoring of the rod bodies cannot be realized, and the, the anchor rod can not form an organic whole with the country rock, can not exert the anchor rod initiative supporting effect completely, causes the support effect to reduce by a wide margin, and the tunnel is fragile material extravagant, seriously influences tunnel safe handling.
Disclosure of Invention
The invention aims to provide an anchor-grouting type flexible anchor rod to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a flexible stock of anchor formula, includes the steel strand wires body of rod, fastening swivel nut, lets clamping ring, tray, self-locking dish, slip casting ware, the one end rigid coupling of the steel strand wires body of rod has the fastening swivel nut, the cooperation has the nut on the fastening swivel nut, nut one side cover be equipped with and let the clamping ring, it is equipped with the tray to let one side of clamping ring, the centre of tray is the hemisphere and the slip casting groove has been seted up on both sides, and one side of tray is equipped with the self-locking dish, run through on the self-locking dish and seted up the tight through-hole of locking, and one side cover of self-locking dish is equipped with the.
As a still further scheme of the invention: the grouting groove is of an arch structure, and the inner diameter of the grouting groove is matched with the outer diameter of the grouting bent pipe.
As a still further scheme of the invention: let the clamping ring be hollow structure, let the internal diameter of clamping ring and fastening swivel nut's external diameter looks adaptation.
As a still further scheme of the invention: the end part of the self-locking disc is provided with a folded edge.
As a still further scheme of the invention: the slip casting ware includes the joint, the joint is cavity step hole, and the side of joint is fixed with the baffle, the side of joint is connected with the slip casting return bend, and the aperture end of joint is equipped with the sealing washer, the macropore end rigid coupling of joint has the sleeve pipe, the sheathed tube tail end has cup jointed only to starch the cover.
As a still further scheme of the invention: the side embedding of joint is provided with interior screw hole, the both ends of slip casting return bend all are provided with the external screw thread, and the slip casting return bend passes through external screw thread and interior screw hole twist with the joint and closes and be connected, the outer end of slip casting return bend has cup jointed the helmet.
As a still further scheme of the invention: the sealing ring and the grout stopping sleeve are both made of NBR materials, an inner hole of the sealing ring is of a plum blossom-shaped structure, the grout stopping sleeve is of a step-shaped hollow structure, the shape of the locking through hole is the same as that of the inner hole of the sealing ring, and the plum blossom-shaped holes of the locking through hole and the sealing ring are matched with the outer diameter section of the steel strand rod body.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the steel strand as the anchor rod body, has the advantages of high strength, large bearing capacity, light weight, flexibility, unlimited length, pressure relief and the like, and simultaneously, the steel strand does not rotate when the nut is screwed down through the matching of the nut, the tray and the self-locking disc with the baffle on the joint of the slip casting device, so that the designed torque force requirement can be met; in addition, grouting can be facilitated through the grouting device, the organic combination of anchor rod full-length anchoring and surrounding rock grouting reinforcement is realized, the anchor rod supporting effect is greatly improved, anchor and grouting integrated construction is really realized, the overhauling damage of a roadway is greatly reduced, materials are saved, the economic benefit is improved, and a reliable solution is provided for the roadway supporting problem of deep well high-ground pressure soft rock complex geological conditions.
Drawings
Fig. 1 is a schematic structural diagram of an anchor-grouting type flexible anchor rod;
fig. 2 is an exploded view of an anchor-injection type flexible anchor rod;
FIG. 3 is a schematic structural diagram of a grouting device in an anchor-grouting type flexible anchor rod;
fig. 4 is a schematic view of the installation of an anchor injection type flexible anchor rod.
In the figure: 1. a steel strand rod body; 2. fastening a threaded sleeve; 3. a nut; 4. pressing a ring; 5. a tray; 5a, a grouting groove; 6. a grouting device; 6a, a joint; 6b, a baffle plate; 6c, a sealing ring; 6d, grouting a bent pipe; 6e, a sleeve; 6f, a grout stopping sleeve; 6i, inner screw holes; 6h, a protective cap; 7. a self-locking disc; 7a, locking the through hole; 7b, folding the edge.
Detailed Description
Referring to fig. 1 to 4, in an embodiment of the present invention, an anchor-grouting type flexible anchor rod includes a steel strand rod body 1, a fastening screw sleeve 2, a nut 3, a yielding ring 4, a tray 5, a self-locking disc 7, and a grouting device 6, wherein one end of the steel strand rod body 1 is fixedly connected with the fastening screw sleeve 2, the fastening screw sleeve 2 is matched with the nut 3, the yielding ring 4 is sleeved on one side of the nut 3, the tray 5 is arranged on one side of the yielding ring 4, the middle of the tray 5 is hemispherical, grouting grooves 5a are formed on two sides of the tray 5, the self-locking disc 7 is arranged on one side of the tray 5, a locking through hole 7a is formed in the self-locking disc 7 in a penetrating manner, and the grouting device 6 is sleeved on one side of the.
The fastening screw sleeve 2 is fixed on the steel strand rod body by an extrusion method by matching with an extrusion spring not shown in the figure, and the steel strand rod body at the end needs to be exposed for a section so as to be convenient for later installation and construction;
The compression ring 4 is made of rigid materials, the compression ring 4 is of a hollow structure, the inner diameter of the compression ring 4 is matched with the outer diameter of the fastening threaded sleeve 2, and through the compression ring 4 arranged between the fastening threaded sleeve 2 and the tray 5, when the anchor rod is pressed too much, compression protection can be carried out, so that the steel strand rod body 1 is prevented from being broken by overload;
At least one end of the self-locking disc 7 is provided with a folded edge 7b, and under the matched connection of the self-locking disc 7 and the steel strand rod body 1 through the plum blossom-shaped locking through hole 7a, under the clamping of the folded edge 7b of the self-locking disc 7 and the baffle 6b, the situation that the steel strand rod body 1 cannot achieve the designed initial anchoring force when the nut 3 is screwed down can be effectively prevented.
The grouting device 6 comprises a joint 6a, the joint 6a is a hollow stepped hole, a baffle 6b is fixed on the side surface of the joint 6a, the side surface of the joint 6a is connected with a grouting bent pipe 6d, a sealing ring 6c is arranged at the small hole end of the joint 6a, a sleeve 6e is fixedly connected at the large hole end of the joint 6a, and a grout stopping sleeve 6f is sleeved at the tail end of the sleeve 6 e.
The side embedding of joint 6a is provided with interior screw hole 6i, and the both ends of slip casting return bend 6d all are provided with the external screw thread, and slip casting return bend 6d closes the connection through external screw thread and interior screw hole 6i twist with joint 6a, and the protective cap 6h has been cup jointed to the outer end of slip casting return bend 6d, through the protection of cup jointing of protective cap 6h, can protect the external screw thread on slip casting return bend 6d top not harm before the slip casting is used. When the anchor rod is grouted, the protective cap 6h is taken down firstly, and the grouting pipe of the grouting pump is in threaded connection with the top end of the grouting bent pipe 5, so that the anchor rod can be grouted through the grouting device.
The sealing ring 6c and the grout stopping sleeve 6f are both made of NBR materials, an inner hole of the sealing ring 6c is of a plum blossom-shaped structure, the grout stopping sleeve 6f is of a step-shaped hollow structure, the shape of the locking through hole 7a is the same as that of the inner hole of the sealing ring 6c, the plum blossom-shaped holes of the locking through hole 7a and the sealing ring 6c are both matched with the outer diameter section of the steel strand rod body 1, a gap between an outer hole of the joint 6a and the steel strand is sealed through the sealing ring 6c, and the grout stopping sleeve 6f seals the gap between the sleeve 6e and a drill hole, so that the condition that grout of the grout injector 6 leaks in the grouting process can be avoided.
The specific construction method of the invention is as follows:
the method comprises the following steps: when the anchoring-grouting type flexible anchor rod is used for construction support of mine tunnels or tunnels and the like, site constructors firstly assemble the anchoring-grouting type flexible anchor rod for later use according to the figure 1, then use an anchor rod drilling machine to drill out matched anchor rod drill holes according to the diameter and the length of a steel strand rod body 1, put anchoring agents into the drill holes, use the steel strand rod body 1 to push the anchoring agents into the bottom of the drill holes, then use an installation sleeve to connect the anchor rod drilling machine with steel strands at the exposed end of the anchor rod, start the anchor rod drilling machine to drive the steel strand rod body to rotate and stir the anchoring agents, and enable a sleeve 6e and a grout stopping sleeve 6f of the grouting machine to be completely plugged into the drill holes, and the anchor rod drilling machine pushes the steel strand rod body 1 to achieve the set torque force by screwing a nut sleeve 3 after the anchoring agents are solidified. Compress tightly tray 5 through letting clamping ring 4 when nut 3 screws up, and tray 5 extrudees from locking disc 7 again, from locking disc 7 extrudees sealing washer 6c and slip casting ware 6's joint 6a again, the outer mouthful of 6a of butt joint is sealed, simultaneously from hem 7b on the locking disc 7 with connect 6a on the baffle 6b cooperation, and baffle 6b also is extruded and pastes tight drilling rock face increase resistance, resistance is also big more along with pressure, can prevent steel strand wires body of rod 1 rotation like this, thereby guarantee that nut 3 screws up and reaches the settlement moment of torsion power. In addition, the grouting bent pipe 6d needs to penetrate through the grouting groove 5a of the tray 5 during installation, and the grouting bent pipe 6d is prevented from being crushed to influence later-stage grouting use. When grouting, the protective cap 6h of the grouting bent pipe 6d is removed, then the grouting pipe of the grouting pump is connected with the grouting bent pipe 6d, and the grouting operation can be carried out by starting the grouting pump.
The second method comprises the following steps: when the anchoring type flexible anchor rod is used for construction support of mine tunnels or tunnels and the like, according to the diameter and the length of a steel strand rod body 1, a roof bolt drilling machine is used for drilling out matched roof bolt holes, then an anchoring agent is filled into the drilled holes through a grouting device 6, then the flexible anchor rod steel strand rod body 1 sequentially provided with a self-locking disc 7 and a sealing ring 6c penetrates through the grouting device 6, the anchoring agent is pushed into the bottom of the drilled holes through the steel strand rod body 1, then the roof bolt drilling machine is connected with a steel strand at the exposed end of the flexible anchor rod through a mounting sleeve, the roof bolt drilling machine is started to drive the steel strand rod body to rotate and stir the anchoring agent, after the anchoring agent is solidified, the roof bolt drilling machine pushes the steel strand rod body 1, then a tray 5, a yielding ring 4 and a nut 3 are sequentially arranged on a fastening screw sleeve 2, and the nut 3 is screwed through the nut sleeve to achieve the set torque. Compress tightly tray 5 through letting clamping ring 4 when nut 3 screws up, and tray 5 extrudees from locking disc 7 again, from locking disc 7 extrudees sealing washer 6c and slip casting ware 6's joint 6a again, the outer mouthful of 6a of butt joint is sealed, simultaneously from folding 7b of locking disc 7 with connect 6a on the baffle 6b cooperation, and baffle 6b also is extruded and pastes tight drilling rock face increase resistance, resistance is also big more along with pressure, can prevent steel strand wires body of rod 1 rotation like this, thereby guarantee that nut 3 screws up and reaches the settlement moment of torsion power. In addition, the grouting bent pipe 6d needs to penetrate through the grouting groove 5a of the tray 5 during installation, and the grouting bent pipe 6d is prevented from being crushed to influence later-stage grouting use. When grouting, the protective cap 6h of the grouting bent pipe 6d is removed, then the grouting pipe of the grouting pump is connected with the grouting bent pipe 6d, and the grouting operation can be carried out by starting the grouting pump.
The above description is only for the two preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the technical scope of the present invention.
Claims (7)
1. The utility model provides a flexible stock of anchor formula, includes the steel strand wires body of rod (1), fastening swivel nut (2), nut (3), lets clamping ring (4), tray (5), from lock dish (7), slip casting ware (6), a serial communication port, the one end rigid coupling of the steel strand wires body of rod (1) has fastening swivel nut (2), the cooperation has nut (3) on fastening swivel nut (2), nut (3) one side cover be equipped with and let clamping ring (4), let one side of clamping ring (4) be equipped with tray (5), slip casting groove (5a) have been seted up for hemisphere and both sides in the centre of tray (5), and one side of tray (5) is equipped with from lock dish (7), run through on from lock dish (7) and seted up tight lock through-hole (7a), and one side cover from lock dish (7) is equipped with slip casting ware (6).
2. An anchor-injected flexible anchor rod according to claim 1, wherein the grouting groove (5a) is of an arch structure, and the inner diameter of the grouting groove (5a) is matched with the outer diameter of the grouting bent pipe (6 d).
3. An anchored flexible anchor rod according to claim 1, characterized in that the pressure-letting ring (4) is a hollow structure, and the inner diameter of the pressure-letting ring (3) is matched with the outer diameter of the fastening screw sleeve (2).
4. An anchor-injected flexible anchor rod according to claim 1, wherein the end of the self-locking disc (7) is provided with a folded edge (7 b).
5. An anchor-grouting type flexible anchor rod according to claim 1, characterized in that the grouting device (6) comprises a joint (6a), the joint (6a) is a hollow stepped hole, a baffle (6b) is fixed on the side surface of the joint (6a), a grouting bent pipe (6d) is connected on the side surface of the joint (6a), a sealing ring (6c) is arranged at the small hole end of the joint (6a), a sleeve pipe (6e) is fixedly connected at the large hole end of the joint (6a), and a grout stopping sleeve (6f) is sleeved at the tail end of the sleeve pipe (6 e).
6. An anchor-grouting type flexible anchor rod according to claim 5, characterized in that an inner screw hole (6i) is embedded in the side surface of the joint (6a), outer screws are arranged at both ends of the grouting bent pipe (6d), the grouting bent pipe (6d) is screwed with the joint (6a) through the outer screws and the inner screw hole (6i), and a protective cap (6h) is sleeved at the outer end of the grouting bent pipe (6 d).
7. An anchor-grouting type flexible anchor rod as claimed in claim 5, wherein the sealing ring (6c) and the grout stop sleeve (6f) are both made of NBR material, the inner hole of the sealing ring (6c) is of a plum blossom-shaped structure, the grout stop sleeve (6f) is of a step-shaped hollow structure, the shape of the through-locking hole (7a) is the same as that of the inner hole of the sealing ring (6c), and the plum blossom-shaped holes of the through-locking hole (7a) and the sealing ring (6c) are both matched with the outer diameter section of the steel strand rod body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655237.9A CN111706375A (en) | 2020-07-09 | 2020-07-09 | Anchor-grouting type flexible anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655237.9A CN111706375A (en) | 2020-07-09 | 2020-07-09 | Anchor-grouting type flexible anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111706375A true CN111706375A (en) | 2020-09-25 |
Family
ID=72545514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010655237.9A Pending CN111706375A (en) | 2020-07-09 | 2020-07-09 | Anchor-grouting type flexible anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111706375A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112482406A (en) * | 2020-11-30 | 2021-03-12 | 王杰 | Anchor rod supporting device for slope support |
| CN113847074A (en) * | 2021-10-12 | 2021-12-28 | 河海大学 | Self-tapping type drainage multistage yielding anchor rod for controlling large deformation of soft rock |
-
2020
- 2020-07-09 CN CN202010655237.9A patent/CN111706375A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112482406A (en) * | 2020-11-30 | 2021-03-12 | 王杰 | Anchor rod supporting device for slope support |
| CN113847074A (en) * | 2021-10-12 | 2021-12-28 | 河海大学 | Self-tapping type drainage multistage yielding anchor rod for controlling large deformation of soft rock |
| CN113847074B (en) * | 2021-10-12 | 2023-11-10 | 河海大学 | Self-tapping type drainage multistage abdication anchor rod for controlling large deformation of soft rock |
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