Sleeve type full-anchor grouting anchor rod assembly

Abstract

The utility model belongs to the technical field of underground mine roadway anchor rod supporting, and particularly relates to a sleeve type full-anchor grouting anchor rod assembly. Comprising a plurality of anchor rods, inverted nails are arranged at the top of a rod body, a sleeve is arranged outside the rod body in a sleeving mode, grout stoppers are supported between the sleeve and the rod body through torsion springs, and each row of grout stoppers are located below the corresponding row of grout flowing holes; the outer side of the bottom of the sleeve is sequentially sleeved with a connecting base and a grouting tray, and a grouting opening is formed in the grouting tray. The connecting bases of every two adjacent anchor rods are connected together through a connecting rod, and one-way bending devices are arranged on the connecting rods. Compared with a traditional anchor rod support, the grouting anchor rod assembly is easy and convenient to construct, the grouting anchor rod with the inverted nail structure can adapt to various complex geological conditions, and particularly, good adaptability can be shown in the environments of soft rock, fractured rock and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to underground mine roadway anchor rod supporting technical field especially relates to a sleeve type full anchor grouting anchor rod assembly. BACKGROUND

[0002] With the increase of mining depth, the deformation and destruction of deep rock mass are intensified, in order to ensure the safety of the staff in the mine roadway, the roadway anchor rod supporting has become a common supporting means. Anchor rod supporting can enhance the stability of rock mass, prevent the deformation and destruction of surrounding rock, and ensure the safety of underground operation. Anchor rod can be designed and constructed according to different geological conditions and engineering requirements, and is suitable for various environments and conditions.

[0003] Although the conventional anchor rod supporting is widely used in practical application, it also has certain problems and limitations, for example, in loose rock stratum, anchor failure is easily caused, the construction process has high requirements, improper construction may cause anchor rod position deviation, insufficient anchoring depth and other problems, which affect the supporting effect. The grouting anchor rod is a supporting structure combining anchor rod and grouting technology, the grouting anchor rod can form good bonding force between the anchor rod and the surrounding loose rock mass by injecting grout, which can significantly enhance the anchoring effect and improve the bearing capacity of the anchor rod, thereby improving the overall strength and stability of the rock mass. However, the existing grouting anchor rod cannot effectively control the deformation of the rock mass after a long time of use, which easily causes the settlement and displacement of the rock mass, thereby affecting the stability of the roadway; and the construction is complex and cannot well adapt to various rock mass environments. SUMMARY

[0004] In order to overcome the above problems, the utility model provides a sleeve type full anchor grouting anchor rod assembly, compared with the traditional anchor rod supporting, the grouting anchor rod assembly is simple in construction, the grouting anchor rod with the reverse nail structure can adapt to various complex geological conditions, especially in soft rock, broken rock and other environments, and can show good adaptability; and the stability and bearing capacity of the anchor rod can be maintained for a long time, which is suitable for long-term use engineering and reduces the maintenance cost.

[0005] A sleeve type full anchor grouting anchor rod assembly comprises a plurality of anchor rods, the anchor rod comprises a rod body 1, a sleeve 2 with a plurality of rows of grout flow holes 21, a grouting tray 3 and a connecting base 71; wherein the rod body 1 is provided with a reverse nail 11 at the top, the sleeve 2 is sleeved on the outer wall of the rod body 1, and a row of grout stoppers 13 is arranged below each row of grout flow holes 21, and the grout stopper 13 is supported between the inner wall of the sleeve 2 and the outer wall of the rod body 1 through the torsional spring 12; the connecting base 71 and the grouting tray 3 are sequentially sleeved on the outer side of the bottom of the sleeve 2, and the grouting tray 3 is provided with a grouting port 6, and the grouting port 6 is communicated with the inside of the sleeve 2; the connecting bases 71 of every two adjacent anchor rods are connected together through the connecting rod 73, and the one-way bender 72 is arranged on the connecting rod 73.

[0006] The rod body 1 is provided with a plurality of inverted nails 11 arranged uniformly on the top in the circumferential direction.

[0007] The sleeve 2 is fastened by the sleeve fastener 4 screwed on the threads on the bottom of the sleeve 2.

[0008] The rod body 1 is fastened by the rod body fastener 5 screwed on the threads on the bottom of the rod body 1.

[0009] The one-way bending device 72 comprises a fixed wheel 721, a pawl 722, a ratchet 723, an upper connecting plate 724, a lower connecting plate 725 and a ratchet wheel 726, wherein the fixed wheel 721 is located inside the ratchet wheel 726, and the outer ring of the fixed wheel 721 is engaged with the inside of the ratchet wheel 726 through a plurality of ratchets 723, the upper connecting plate 724 is provided with a boss at the lower end, and the boss is fixed in the groove above the fixed wheel 721, and the lower connecting plate 725 is fixed on the bottom of the ratchet wheel 726.

[0010] The connecting rod 73 comprises two connecting rods arranged in an upper and lower manner, the upper connecting rod is fixed on the upper connecting plate 724 of the corresponding one-way bending device 72, and the lower connecting rod is fixed on the lower connecting plate 725 of the corresponding one-way bending device 72.

[0011] The right side of the lower connecting plate 725 is recessed in an arc shape and used for cooperating with the ratchet wheel 726.

[0012] The sleeve type full-anchor grouting anchor rod assembly comprises five anchor rods arranged in a five-ring shape, i.e. the five anchor rods are divided into two rows, the first row is provided with three anchor rods, and the second row is provided with two anchor rods, wherein the first anchor rod and the second anchor rod of the first row are connected together through the connecting rod 73, the second anchor rod and the third anchor rod of the first row are connected together through the connecting rod 73, the two anchor rods of the second row are connected together through the connecting rod 73, the first anchor rod of the second row is connected together with the first anchor rod of the first row and the second anchor rod of the first row through the connecting rod 73, and the second anchor rod of the second row is connected together with the second anchor rod of the first row and the third anchor rod of the first row through the connecting rod 73.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] (1) the top of the rod body is provided with a reverse nail device, which can effectively prevent the rod body from falling off during installation, and the reverse nail can be closely attached to the hole wall under the combined action of the reverse nail and the torsional spring, thereby effectively improving the anchoring effect between the anchor rod and the rock mass. A slurry flow stopper is arranged below the rod body, which can make the slurry flow in one direction during grouting, effectively preventing the backflow of the slurry. At the same time, under the action of the slurry flow stopper and the torsional spring, the sleeve can be closely attached to the rod body, preventing the sleeve from falling off during installation.

[0015] (2) Through grouting, the deformation of the rock mass can be effectively controlled, the settlement and displacement of the rock mass can be reduced, and the stability of the roadway can be maintained. Compared with the traditional anchor rod support, the grouting anchor rod is simple to construct, the grouting anchor rod with the reverse nail structure can adapt to various complex geological conditions, especially in soft rock, broken rock and other environments, and can exhibit good adaptability. At the same time, the slurry flow stopper can help the slurry to be more evenly distributed in the anchoring area during injection, fill more fissures, and improve the overall stability of the anchoring area. The combination of the reverse nail structure and the grouting technology can maintain the stability and bearing capacity of the anchor rod for a long time, is suitable for long-term use engineering, can reduce maintenance costs in the long run, and has good economic efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0018] Figure 2 It is a schematic diagram of the coupling mechanism of the present application;

[0019] Figure 3 It is a schematic diagram of the ratchet structure of the present application;

[0020] Figure 4 It is a schematic diagram of the present application after grouting is completed to block the grouting port.

[0021] The reference signs are explained as follows:

[0022] 1-Rod body, 11-Inverted nail, 12-Torsion spring, 13-Slurry stopper, 2-Sleeve, 21-Slurry flow hole, 3-Grouting tray, 4-Sleeve fastener, 5-Rod body fastener, 6-Grouting port, 61-Grouting port blocking block, 7-Connecting mechanism, 71-Connecting base, 72-One-way bender, 721-Stationary wheel, 722-Pawl, 723-Ratchet, 724-Upper connecting plate, 725-Lower connecting plate, 726-Ratchet. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0024] Example 1

[0025] A type of sleeve-type fully anchored grouting anchor assembly, such as Figures 1-4 As shown, the anchor includes multiple anchor rods, each anchor rod comprising a rod body 1, a sleeve 2 with multiple rows of grout flow holes 21, a grouting tray 3, and a connecting base 71. The rod body 1 has a top inverted nail 11, the sleeve 2 is fitted over the rod body 1, and a grout stopper 13 is supported by a torsion spring 12 between the inner wall of the sleeve 2 and the outer wall of the rod body 1. Each row of grout stoppers 13 is located below a corresponding row of grout flow holes 21. The connecting base 71 and the grouting tray 3 are sequentially fitted onto the outer side of the bottom of the sleeve 2, and the grouting tray 3 has a grouting port 6. The connecting bases 71 of each pair of adjacent anchor rods are connected together by a connecting rod 73, and the connecting rod 73 has a one-way bending device 72.

[0026] The outer ring of the rod body 1 below the inverted nail 11 is provided with multiple rows of slurry stoppers 13, and the middle part of the slurry stopper 13 is connected to the outer wall of the rod body 1 by a torsion spring 12.

[0027] The top of the rod 1 is provided with a plurality of inverted nails 11 evenly arranged along the circumference.

[0028] The sleeve 2 has threads on the outer side of its bottom, and the sleeve fastener 4 fastens the sleeve 2 by tightening it on the threads at the bottom of the sleeve 2.

[0029] The bottom outer side of the rod 1 is threaded, and the rod fastener 5 fastens the rod 1 by tightening it on the thread at the bottom of the rod 1.

[0030] The one-way bender 72 comprises a fixed wheel 721, a pawl 722, a ratchet 723, an upper connecting plate 724, a lower connecting plate 725, and a ratchet wheel 726, wherein the fixed wheel 721 is located inside the ratchet wheel 726, and the outer ring of the fixed wheel 721 is engaged with the inside of the ratchet wheel 726 through a plurality of ratchets 723, the upper end of the upper connecting plate 724 is provided with a boss, and the boss is fixed in the groove above the fixed wheel 721, and the lower connecting plate 725 is fixed on the bottom of the ratchet wheel 726.

[0031] The connecting rod 73 comprises two connecting rods, the upper connecting rod is fixed on the upper connecting plate 724 of the corresponding one-way bender 72, and the lower connecting rod is fixed on the lower connecting plate 725 of the corresponding one-way bender 72.

[0032] The lower connecting plate 725 is recessed and arc-shaped on the right side, which is used to cooperate with the ratchet wheel 726.

[0033] The sleeve type full-anchor grouting anchor rod assembly comprises five anchor rods, which are arranged in five annular shapes, i.e., the five anchor rods are divided into two rows, the first row has three anchor rods, which are arranged in a triangular shape, the second row has two anchor rods, the first anchor rod and the second anchor rod of the first row are connected together through the connecting rod 73, the second anchor rod and the third anchor rod of the first row are connected together through the connecting rod 73, the two anchor rods of the second row are connected together through the connecting rod 73, the first anchor rod of the second row is connected together with the first anchor rod of the first row and the second anchor rod of the first row through the connecting rod 73, and the second anchor rod of the second row is connected together with the second anchor rod of the first row and the third anchor rod of the first row through the connecting rod 73.

[0034] An anchoring method of a sleeve type full-anchor grouting anchor rod group, comprising the following steps:

[0035] S1, drilling a hole at a predetermined position of the surrounding rock of the roadway, after the drilling is completed, first installing the rod body 1 into the hole, and in the installation process, inserting the rod body 1 at one end of the reverse nail 11 into the deep part of the hole, and tightly fitting and fastening the reverse nail 11 with the hole wall, so that the reverse nail 11 is fixed after being inserted into the rock wall.

[0036] S2, sleeving the sleeve 2 to the outside of the rod body 1, so that the top of the sleeve 2 is fitted below the reverse nail 11, and the rod body 1 and the sleeve 2 are fixed under the action of the slurry stopper 13. Specifically, in the sleeving process, the torsion spring 12 will pass through the corresponding slurry flow hole 21, and then the slurry stopper 13 is supported between the inner wall of the sleeve 2 and the outer wall of the rod body 1 below the corresponding slurry flow hole 21 by the torsion spring 12.

[0037] S3, after installing five rods 1 and corresponding sleeves 2 in the drilling at the predetermined position, coupling mechanism 7 is installed on the sleeves 2 respectively, then grouting tray 3 is installed on the coupling base 71 respectively, and finally the rods 1 and sleeves 2 are fastened by the fasteners respectively.

[0038] S4, grouting is carried out through the grouting hole 6 on the grouting tray 3, during the grouting process, the grout flow stopper 13 can make the grout flow in one direction, effectively preventing the grout from flowing backward, and after the grouting is completed, the grouting hole 6 is plugged, and the anchoring of the surrounding rock of the roadway is completed.

[0039] In the process of anchoring, the surrounding rock of the roadway may still have the possibility of continuing to deform, in this case, since the coupling rod 73 is a upper and lower connecting rod, and a one-way folder 72 is arranged in the middle, when each anchor rod is subjected to the pressure applied by the deformation of the surrounding rock of the roadway, the structure of the coupling rod 73 of the upper and lower connecting rods can withstand greater pressure, thereby ensuring the stability of each anchor rod, in addition, since the one-way folder 72 can only fold in one direction, and the upper connecting plate 724 needs to drive the idler wheel 721, through the movement of the ratchet teeth 723 on the ratchet wheel 726, the lower connecting plate 725 can drive the lower connecting rod to move, this pressure needs to reach a certain degree to be realized, so the one-way folder 72 also helps the anchor rod to resist part of the pressure caused by the deformation of the surrounding rock of the roadway to a certain extent.

[0040] Embodiment 2

[0041] Referring to Figure 1 A sleeve type full-anchor grouting anchor rod group and anchoring method, comprising a rod body 1, a sleeve 2, a grouting tray 3 and a coupling mechanism 7. The top of the rod body 1 is provided with a reverse nail 11, referring to Figure 2 The number of reverse nails 11 is four groups, the reverse nails 11 are fixed on the top of the rod body 1, which can effectively prevent the rod body 1 from falling off during installation, at the same time, the reverse nails 11 can be closely attached to the hole wall, which can effectively improve the anchoring effect between the anchor rod and the rock mass.

[0042] Four groups of grout flow stoppers 13 are arranged below the reverse nails 11, the movable end of the grout flow stopper 13 is fixed on the rod body 1, and the middle part of the grout flow stopper 13 is connected with the torsional spring 12. A sleeve 2 with a grout flow hole 21 is arranged outside the rod body 1, the grout flow hole 21 is four groups and is distributed above the grout flow stopper 13. During the grouting process, the grout can flow in one direction, effectively preventing the grout from flowing backward. At the same time, under the action of the grout flow stopper 13 and the torsional spring 12, the sleeve 2 can be closely attached to the rod body 1, preventing the sleeve 2 from falling off during installation. During the installation of the anchor rod, the rod body 1 needs to be installed first, and then the sleeve 2 is installed.

[0043] Referring to Figures 3 to 4A coupling base 71 is arranged outside the sleeve 2, the coupling base 71 being part of the coupling mechanism 7, the coupling mechanism 7 comprising five groups of coupling bases 71, forming a five-coupling anchor rod group. The coupling bases 71 are connected by a coupling rod 73, and a one-way bender 72 is arranged in the middle of the coupling rod 73. The one-way bender 72 is internally provided with a ratchet structure, and the one-way bending of the one-way bender 72 can be realized through the cooperation of the idler 721, the pawl 722 and the ratchet teeth 723, and the number of the pawls 722 is three. After the coupling base 71 is installed, the grouting tray 3 is passed through the sleeve 2 and fixed, and the grouting port 6 is arranged on the grouting tray 3. Threaded holes are arranged at the ends of the sleeve 2, and the sleeve fastener 4 is used to fasten the sleeve 2. Meanwhile, threaded holes are also arranged at the ends of the rod body 1, and the rod body fastener 5 is used to fasten the rod body 1.

[0044] An anchoring method of a sleeve type full-anchor grouting anchor rod group, comprising the following steps:

[0045] S1, drilling a hole at a predetermined position of the surrounding rock of the roadway, and first installing the rod body 1 into the hole during the installation process, and the inverted nail 11 can be tightly attached to the hole wall and fastened.

[0046] S2, installing the sleeve 2 outside the rod body 1, and fixing the rod body 1 and the sleeve 2 under the action of the slurry flow stopper 13.

[0047] S3, repeating the steps S1 and S2, after installing five rod bodies 1 and sleeves 2 at the predetermined position, installing the coupling mechanism 7 on the sleeve 2 respectively, then installing the grouting tray 3 on the coupling base 71 respectively, and finally fastening the rod body 1 and the sleeve 2 by using the fastener.

[0048] S4, grouting through the grouting port 6 on the grouting tray 3, and plugging after grouting is completed.

[0049] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the protection scope of the present application is not limited to the specific details in the above embodiments. Any person skilled in the art can make equivalent replacements or changes to the technical scheme and the technical concept of the present application within the technical range disclosed by the present application, and these simple modifications all belong to the protection scope of the present application.

[0050] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not describe various possible combinations again.

[0051] In addition, various different embodiments of the present application can be combined arbitrarily, as long as they do not violate the spirit of the present application, and should be considered as disclosed by the present application.

Claims

1. A sleeve-type fully anchored grouting anchor bolt assembly, characterized in that, The system includes multiple anchor rods, each anchor rod comprising a rod body (1), a sleeve (2) with multiple rows of grout flow holes (21), a grouting tray (3), and a connecting base (71). The rod body (1) has a top inverted nail (11), the sleeve (2) is fitted over the rod body (1), and a row of grout stoppers (13) is provided below each row of grout flow holes (21). The grout stoppers (13) are supported by torsion springs (12) between the inner wall of the sleeve (2) and the outer wall of the rod body (1). The connecting base (71) and the grouting tray (3) are sequentially fitted on the outer side of the bottom of the sleeve (2), and the grouting tray (3) is provided with a grouting port (6), which communicates with the inside of the sleeve (2). The connecting bases (71) of each two adjacent anchor rods are connected together by a connecting rod (73), and the connecting rod (73) is provided with a one-way bender (72).

2. The sleeve-type fully anchored grouting anchor assembly according to claim 1, characterized in that, The top of the rod (1) is provided with a plurality of inverted nails (11) evenly arranged along the circumference.

3. The sleeve-type fully anchored grouting anchor assembly according to claim 1, characterized in that, The sleeve (2) has threads on the outer side of its bottom, and the sleeve fastener (4) fastens the sleeve (2) by tightening it on the threads at the bottom of the sleeve (2).

4. The sleeve-type fully anchored grouting anchor assembly according to claim 1, characterized in that, The bottom outer side of the rod (1) is provided with threads, and the rod fastener (5) fastens the rod (1) by tightening it on the threads at the bottom of the rod (1).

5. A sleeve-type fully anchored grouting anchor assembly according to claim 1, characterized in that, The one-way bending device (72) includes a stationary wheel (721), a pawl (722), a ratchet (723), an upper connecting plate (724), a lower connecting plate (725), and a ratchet (726). The stationary wheel (721) is located inside the ratchet (726), and its outer ring engages with the ratchet (726) through multiple ratchet teeth (723). The lower end of the upper connecting plate (724) is provided with a boss, which is fixed in the groove of the stationary wheel (721). The lower connecting plate (725) is fixed to the bottom of the ratchet (726).

6. A sleeve-type fully anchored grouting anchor assembly according to claim 5, characterized in that, The connecting rod (73) includes two connecting rods, an upper connecting rod and a lower connecting rod. The upper connecting rod is fixed on the upper connecting plate (724) of the corresponding one-way bender (72), and the lower connecting rod is fixed on the lower connecting plate (725) of the corresponding one-way bender (72).

7. A sleeve-type fully anchored grouting anchor assembly according to claim 5, characterized in that, The lower connecting plate (725) has a concave arc shape on the right side for engaging with the ratchet (726).

8. A sleeve-type fully anchored grouting anchor assembly according to claim 1, characterized in that, The sleeve-type full-anchor grouting anchor assembly includes five anchors arranged in a five-ring pattern, that is, the five anchors are divided into two rows, the first row has three anchors and the second row has two anchors. The first and second anchors in the first row are connected together by a connecting rod (73), the second and third anchors in the first row are connected together by a connecting rod (73), the two anchors in the second row are connected together by a connecting rod (73), the first anchor in the second row is connected to the first anchor and the second anchor in the first row by a connecting rod (73), and the second anchor in the second row is connected to the second anchor and the third anchor in the first row by a connecting rod (73).

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