Top-down grouting type pressurizing anchor rod

Abstract

The utility model provides a top-down grouting type pressurizing anchor rod, and belongs to the field of mine underground surrounding rock grouting supporting, and the top-down grouting type pressurizing anchor rod can achieve top-down grouting and ensure uniform distribution of grout by designing a sealing component movably penetrating through an anchoring anchor rod component under the cooperation of a grouting pipe; bubbles and holes are avoided; in addition, the installation step of the gas guide pipe in the anchor rod is simplified, and the grouting efficiency of the anchor rod is improved; besides, the arc-shaped pressing plate is arranged at the bottom end of the support, after grouting is completed, when the other end of the pressing plate makes contact with the wedge-shaped component, the wedge-shaped component abuts against the pressing plate, the pressing plate is further bent, at the moment, the pressing plate can provide upward pressure for the whole grouting area, the slurry seepage pressure can be improved, and grouting slurry is more compact during curing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine underground surrounding rock grouting support, in particular to a self-top-to-bottom grouting type pressure-increasing anchor rod. BACKGROUND

[0002] The roadway unloading excavation breaks the original rock stress balance state, so that the rock mass around the excavation face moves under the action of stress concentration, and even a broken zone may be produced around the roadway in some places with large ground stress. The anchor rod becomes the most common supporting material in mines because of its good supporting effect. However, the traditional anchor rod supporting technology can only produce tensile stress at both ends of the anchor rod, and cannot produce stress effect on the intermediate rock mass. With the development of anchor rod supporting technology, the existing grouting anchor rod can realize full-length anchoring of the rock mass, and is particularly suitable for supporting of broken surrounding rock. However, the current grouting method generally adopts sealing at the hole opening, and after grouting through the grouting pipe, the grouting technology of using the gas guide pipe to exhaust. Although this grouting method is relatively simple, it is difficult to make the slurry in the hole completely dense, and it is also not conducive to the penetration of the slurry into the fractured rock mass. Therefore, in order to enhance the supporting effect of the grouting anchor rod, how to improve the grouting quality and grouting penetration pressure is a problem that needs to be solved at present.

[0003] Therefore, it is necessary to design a self-top-to-bottom grouting type pressure-increasing anchor rod to solve the above problems. SUMMARY

[0004] In view of the technical problems in the background art, the present application provides a self-top-to-bottom grouting type pressure-increasing anchor rod. The self-top-to-bottom grouting type pressure-increasing anchor rod sets a movable sealing member on the anchoring anchor rod member, sets a pressure plate at the bottom end of the support of the sealing member, and sets a wedge-shaped member near the bottom end of the rod body in the anchoring anchor rod member. In this way, self-top-to-bottom grouting can be realized, the slurry can be uniformly distributed, the generation of air bubbles and cavities can be avoided, and the denseness and uniformity of grouting can be improved. When grouting is completed, the pressure plate abuts against the wedge-shaped member to provide upward pressure for the entire grouting area. In this way, the slurry penetration pressure can be improved, and the grouting material can be more compact when solidified.

[0005] The present application provides a self-top-to-bottom grouting type pressure-increasing anchor rod, which comprises an anchoring anchor rod member, a sealing member movably arranged on the anchoring anchor rod member, and a grouting member penetrating through the sealing member.

[0006] The sealing member comprises a support movably arranged on the anchoring anchor rod member and a sealing part embedded in the support. The sealing part is used to seal the gap between the anchoring anchor rod member and the support, so that the anchoring anchor rod member is stably embedded in the support.

[0007] The anchoring anchor member comprises a rod body penetrating the sealing member, a baffle arranged on the rod body, the baffle being close to the top end of the rod body; a grouting section is formed between the baffle and the sealing member;

[0008] The top end of the grouting pipe in the grouting member penetrates the sealing member and communicates with the grouting section.

[0009] In the technical scheme of the embodiment, the sealing member penetrating the anchoring anchor member is designed to be movable, and in cooperation with the grouting pipe, the grouting can be realized from top to bottom, the grouting material is uniformly distributed, the generation of air bubbles and cavities is avoided, and the compactness and uniformity of the grouting are improved; in addition, the installation step of the air guide pipe in the anchor rod is simplified, and the efficiency of the anchor rod grouting is improved.

[0010] In some embodiments, the sealing member further comprises a plurality of pressing plates arranged at the bottom end of the bracket; the pressing plates are arc-shaped; one end of the pressing plates is connected with the bracket;

[0011] A wedge-shaped member is arranged close to the bottom end of the rod body in the anchoring anchor member;

[0012] When the other end of the pressing plate contacts the wedge-shaped member, the wedge-shaped member abuts against the pressing plate, and the arc-shaped pressing plate is further bent.

[0013] In the technical scheme of the embodiment, the arc-shaped pressing plate is arranged at the bottom end of the bracket, when the other end of the pressing plate contacts the anchoring anchor member and does not contact the wedge-shaped member, the pressing plate can further stably embed the anchoring anchor member in the bracket; when the grouting is completed, the other end of the pressing plate contacts the wedge-shaped member, the wedge-shaped member abuts against the pressing plate, and the pressing plate is further bent, at this time, the pressing plate can provide upward pressure for the entire grouting area, so that the grouting material penetration pressure is improved, and the grouting material is more compact when solidified.

[0014] In some embodiments, the grouting member comprises a grouting pipe penetrating the bracket, and a one-way valve arranged on the grouting pipe; the one-way valve is used to prevent the grouting material from flowing reversely.

[0015] In some embodiments, the grouting pipe comprises a first grouting pipe penetrating the bracket, and a second grouting pipe connected with the pipe opening of the first grouting pipe through the one-way valve.

[0016] In some embodiments, the one-way valve comprises a connecting pipe connecting the first grouting pipe and the second grouting pipe, a sieve embedded in the pipe diameter of the connecting pipe, and a ball arranged in the pipe diameter of the connecting pipe; the ball is located below the sieve.

[0017] In some embodiments, the connecting pipe has a tapered shape, and the pipe diameter gradually changes from small to large and then from large to small from top to bottom; the diameter of the sieve is larger than that of the ball; the diameter of the ball is larger than that of the pipe orifice at the bottom end of the connecting pipe.

[0018] In the technical scheme of the embodiments of the present application, the one-way valve provided on the grouting pipe can avoid the backflow of grouting material during grouting, so as to ensure the grouting pressure.

[0019] In some embodiments, the top end of the rod body is provided with a plurality of barbs, and the barb tips are directed towards the bottom end of the rod body.

[0020] The baffle is located between the barb and the sealing member.

[0021] In the technical scheme of the embodiments of the present application, the plurality of barbs provided at the top end of the rod body can provide stronger anchoring force after the rod is inserted into the resin anchoring agent, and help to improve the anchoring effect of the rod and the surrounding rock.

[0022] In some embodiments, the side edge of the baffle is provided with an inverted flange, and the side edge of the bracket is provided with an inverted flange; the inverted flange is in an arc shape.

[0023] In the technical scheme of the embodiments of the present application, the inverted flange can make the entire device move more smoothly in the borehole.

[0024] In some embodiments, the sealing member includes a sealing rubber ring.

[0025] In some embodiments, the sealing member further includes a baffle ring arranged at the top end of the bracket.

[0026] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following will describe the specific embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme of the present application, the drawings used in the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any creative labor.

[0028] Fig. 1 The structure of the self-top-to-bottom grouting type booster anchor rod in the present application is shown in the figure.

[0029] Fig. 2Figure 6 is a partial enlarged view of the self-top-to-bottom grouting type pressure-boosting anchor rod in the present application;

[0030] Fig. 3 Figure 7 is a structural schematic view of the contact between the sealing member and the wedge-shaped member in the self-top-to-bottom grouting type pressure-boosting anchor rod in the present application;

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 11, rod body; 12, baffle; 13, wedge-shaped member; 14, barb; 15, turned-up flange; 16, tray; 21, bracket; 22, sealing member; 23, pressing plate; 24, retaining ring; 311, grouting pipe 1; 312, grouting pipe 2; 32, one-way valve; 321, connecting pipe; 322, sieve; 323, ball; 4, anchoring section; 5, grouting section. DETAILED DESCRIPTION

[0033] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0036] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are an "or" relationship.

[0038] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0039] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0040] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] The grouting mode of the anchor support technology in the prior art generally adopts sealing at the orifice, and the grouting technology uses a gas guide pipe to discharge gas after grouting through a grouting pipe, but it is difficult to make the grout in the hole completely dense, and it is also not conducive to the penetration of the grout into the fractured rock mass. Therefore, how to reasonably design to improve the grouting quality and grouting penetration pressure is particularly important.

[0042] To solve the above technical problems, the application provides a self-top-to-bottom grouting type pressure-boosting anchor rod, which is characterized in that a movable sealing member is arranged on an anchoring anchor rod member, a pressing plate 23 is arranged at the bottom end of a support 21 of the sealing member, and a wedge-shaped member 13 is arranged at the bottom end of a rod body 11 in the anchoring anchor rod member.

[0043] The following embodiments are described by taking a self-top-to-bottom grouting type pressure-boosting anchor rod as an example for the convenience of description.

[0044] Please refer to Figs. 1-3 The self-top-to-bottom grouting type pressure-boosting anchor rod provided by the application includes an anchoring anchor rod member, a sealing member movably arranged on the anchoring anchor rod member, and a grouting member penetrating through the sealing member.

[0045] The sealing member includes a support 21 movably arranged on the anchoring anchor rod member and a sealing part 22 embedded in the support 21; the sealing part 22 is used to seal the gap between the anchoring anchor rod member and the support 21, so that the anchoring anchor rod member is stably embedded in the support 21.

[0046] The anchoring anchor rod member includes a rod body 11 penetrating through the sealing member, a baffle 12 arranged on the rod body 11, and a tray 16 arranged on the rod body 11; the baffle 12 is located at the top end of the rod body 11; the baffle 12 and the sealing member constitute a grouting section 5; and the tray 16 is located at the bottom end of the rod body 11.

[0047] The sealing member is located between the top end and the bottom end of the rod body 11 in the anchoring anchor rod member.

[0048] The top end of the grouting pipe in the grouting member penetrates through the sealing member and communicates with the grouting section 5.

[0049] When grouting material is injected into the grouting section 5 through the grouting pipe, the sealing member movably penetrating through the anchoring anchor rod member moves along the rod body 11 from top to bottom with the increase of the grouting material, so that the grouting material can be uniformly distributed, air bubbles and cavities can be avoided, and the compactness and uniformity of grouting can be improved; in addition, the installation step of the air guide pipe in the anchor rod is simplified, and the efficiency of anchor rod grouting is improved.

[0050] Further, in some embodiments of the present application, the sealing member further comprises a plurality of pressing plates 23 arranged at the bottom end of the bracket 21; the pressing plates 23 are arc-shaped; one end of the pressing plates 23 is fixedly connected with the bracket 21; the other end of the pressing plates 23 is connected with the rod body 11; the convex surface of the pressing plates 23 is close to the rod body 11;

[0051] A wedge-shaped member 13 is arranged close to the bottom end of the rod body 11 in the anchoring anchor member; the wedge-shaped member 13 is located at the top end of the tray 16; the shape of the wedge-shaped member 13 comprises a triangle; the right angle side of the wedge-shaped member 13 is connected with the rod body 11.

[0052] When the other end of the pressing plates 23 contacts the wedge-shaped member 13 (the oblique side), the wedge-shaped member 13 abuts against the pressing plates 23, so that the arc-shaped pressing plates 23 are further bent.

[0053] Therefore, when the other end of the pressing plates 23 contacts the anchoring anchor member and does not contact the wedge-shaped member 13, the pressing plates 23 can further stably embed the anchoring anchor member in the bracket 21; when the grouting is completed, the other end of the pressing plates 23 contacts the wedge-shaped member 13 (the oblique side), the wedge-shaped member 13 abuts against the pressing plates 23, and the pressing plates 23 are further bent, so that the pressing plates 23 can provide upward pressure on the entire grouting area, thereby improving the grout permeation pressure and making the grouting material more compact when solidified.

[0054] Further, in some embodiments of the present application, the grouting member comprises a grouting pipe embedded in the bracket 21 and a one-way valve 32 arranged on the grouting pipe; the one-way valve 32 is used to prevent the grout from flowing reversely.

[0055] Further, in some embodiments of the present application, the grouting pipe comprises a grouting pipe one 311 embedded in the bracket 21 and a grouting pipe two 312 connected with the bottom end of the grouting pipe one 311 through the one-way valve 32.

[0056] Further, in some embodiments of the present application, the one-way valve 32 comprises a connecting pipe 321 connecting the grouting pipe one 311 with the grouting pipe two 312, a sieve 322 embedded in the pipe diameter of the connecting pipe 321, and a ball 323 arranged in the pipe diameter of the connecting pipe 321; the ball 323 is located below the sieve 322.

[0057] Further, in some embodiments of the present application, the shape of the connecting pipe 321 comprises a tapered shape; the pipe diameter of the connecting pipe 321 gradually changes from small to large and then from large to small from top to bottom; the diameter of the sieve 322 is larger than the diameter of the ball 323; the diameter of the ball 323 is larger than the diameter of the pipe opening at the bottom end of the connecting pipe 321.

[0058] Thus, by setting the one-way valve 32 on the grouting pipe, the backflow of grouting material during grouting can be avoided, so as to ensure the grouting pressure.

[0059] Further, in some embodiments of the present application, the top end of the rod body 11 is provided with a plurality of barbs 14; the barb tips of the barbs 14 are directed towards the bottom end of the rod body 11.

[0060] The baffle 12 is located between the barbs 14 and the sealing member.

[0061] Thus, by setting the barbs 14 on the top end of the rod body 11, stronger anchoring force can be provided after the anchor rod is inserted into the resin anchoring agent, which helps to improve the anchoring effect of the anchor rod and the surrounding rock stratum.

[0062] Further, in some embodiments of the present application, the side edge (the side away from the rod body 11) of the baffle 12 is provided with an inverted flange 15; the side edge (the side away from the rod body 11) of the bracket 21 is provided with an inverted flange 15; the inverted flange 15 is in the shape of an arc (bracket shape).

[0063] Thus, by setting the inverted flange 15, the entire device can move more smoothly in the borehole.

[0064] Preferably, in some embodiments of the present application, the sealing member 22 can be a sealing rubber ring.

[0065] Further, in some embodiments of the present application, the sealing member further comprises a blocking ring 24 arranged at the top end of the bracket 21.

[0066] In particular, in some embodiments of the present application, the bracket 21 can be provided in the form of a hollow bracket.

[0067] Thus, by setting the blocking ring 24 at the top end of the bracket 21, the grouting segment 5 can be prevented from permeating out of the bracket 21 during grouting.

[0068] Preferably, in some embodiments of the present application, the grouting pipe is parallel to the extension direction of the rod body 11.

[0069] Preferably, in some embodiments of the present application, the extension direction of the baffle 12 can be perpendicular to the extension direction of the rod body 11.

[0070] Please refer to Figs. 1-3According to one or more embodiments of the present application, the top-down grouting type pressure-boosting anchor provided by the present application can realize top-down grouting by designing a movable sealing member penetrating the anchoring anchor member and cooperating with the grouting pipe, thereby ensuring uniform distribution of the grout, avoiding the generation of bubbles and cavities, and improving the compactness and uniformity of grouting. Furthermore, the additional air guide pipe is not needed, thereby simplifying the installation steps of the air guide pipe in the anchor and improving the efficiency of anchor grouting. In addition, the arc-shaped pressing plate 23 is arranged at the bottom end of the support 21, when the other end of the pressing plate 23 is in contact with the anchoring anchor member and not in contact with the wedge-shaped member 13, the pressing plate 23 can further stably embed the anchoring anchor member in the support 21. When the grouting is completed, the other end of the pressing plate 23 is in contact with the wedge-shaped member 13, the wedge-shaped member 13 abuts against the pressing plate 23 and further bends the pressing plate 23, at this time, the pressing plate 23 can provide upward pressure for the entire grouting area, thereby improving the grout permeation pressure and making the grouting material more compact when solidified.

[0071] The entire device is simple to operate, stable in operation, energy-saving and environmentally friendly, effectively reduces the labor intensity and production cost, and has good energy-saving and emission-reducing effects.

[0072] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and embodiments having the same technical idea and playing the same role and effect within the scope of the technical solutions of the present application are all included in the technical scope of the present application. In addition, within the scope of the main idea of the present application, various modifications of the embodiments that can be thought of by those skilled in the art, and other ways constructed by combining part of the constituent elements of the embodiments are also included in the scope of the present application.

Claims

1. A top-down grouted pressurized anchor rod, characterized in that, The utility model relates to a sealing structure of anchor rod, which comprises an anchoring anchor rod component, a sealing component movably arranged on the anchoring anchor rod component and a grouting component penetrating through the sealing component. The sealing component comprises a bracket movably arranged on the anchoring anchor rod component and a sealing part embedded in the bracket, which is used to seal the gap between the anchoring anchor rod component and the bracket so as to stably embed the anchoring anchor rod component in the bracket. The anchoring anchor rod component comprises a rod body penetrating through the sealing component and a baffle arranged on the rod body and close to the top end of the rod body, and a grouting section is formed between the baffle and the sealing component. The top end of the grouting pipe in the grouting component penetrates through the sealing component and communicates with the grouting section. The sealing component further comprises a plurality of pressing plates arranged at the bottom end of the bracket, which are arc-shaped and connected to the bracket at one end.

2. A top-down grouting pressurized anchor rod according to claim 1, characterized in that, A wedge-shaped component is arranged close to the bottom end of the rod body in the anchoring anchor rod component. When the other end of the pressing plate contacts the wedge-shaped component, the wedge-shaped component abuts against the pressing plate to further bend the arc-shaped pressing plate. The grouting component comprises a grouting pipe penetrating through the bracket and a one-way valve arranged on the grouting pipe, which is used to prevent the grout from flowing reversely.

3. A top-down grouting pressurized anchor rod according to claim 1, characterized in that, The grouting pipe comprises a first grouting pipe penetrating through the bracket and a second grouting pipe connected to the pipe opening of the first grouting pipe through the one-way valve.

4. A top-down grouting pressurized anchor rod according to claim 3, characterized in that, The one-way valve comprises a connecting pipe connecting the first grouting pipe and the second grouting pipe, a sieve embedded in the pipe diameter of the connecting pipe and a ball arranged in the pipe diameter of the connecting pipe, wherein the ball is below the sieve.

5. A top-down grouting pressurized anchor rod according to claim 4, characterized in that, The shape of the connecting pipe comprises a tapered shape, and the pipe diameter of the connecting pipe gradually changes from small to large and then from large to small from top to bottom; the diameter of the sieve is larger than that of the ball; the diameter of the ball is larger than that of the pipe opening at the bottom end of the connecting pipe.

6. A top-down grouting pressurized anchor rod according to claim 5, characterized in that, The top end of the rod body is surrounded by a plurality of barbs, and the barb tips of the barbs face the bottom end of the rod body.

7. A top-down grouting pressurized anchor rod according to claim 1, characterized in that, The baffle is between the barbs and the sealing component. The side edges of the baffle and the bracket are provided with arc-shaped inner flanges.

8. A top-down grouting pressurized anchor rod according to claim 7, characterized in that, The sealing part comprises a sealing rubber ring.

9. A top-down grouting pressurized anchor rod according to claim 1, characterized in that, The sealing component further comprises a stop ring arranged at the top end of the bracket.

10. A top-down grouting pressurized anchor rod according to claim 1, characterized in that, ​

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