CN113090313A

CN113090313A - Multifunctional anchor rod

Info

Publication number: CN113090313A
Application number: CN202110481346.8A
Authority: CN
Inventors: 康红普; 王子越; 罗超; 姜鹏飞; 郭吉昌; 韦尧中; 刘畅; 陈志良; 曹晓明; 高富强; 杨建威
Original assignee: Tiandi Science and Technology Co Ltd; CCTEG Coal Mining Research Institute
Current assignee: Tiandi Science and Technology Co Ltd; CCTEG Coal Mining Research Institute
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-07-09

Abstract

The multifunctional anchor rod comprises an anchor rod body, wherein the anchor rod body comprises a first section and a second section, the first section is provided with external threads, the second section is provided with a spiral transverse rib, and a drill bit is arranged at the end part, located at the second section, of the anchor rod body; the anchor rod body is internally provided with a middle hole, and a mixer for mixing the anchoring agent is arranged in the middle hole. According to the multifunctional anchor rod provided by the embodiment of the invention, the first section is used for connecting a construction machine to drill and place the anchor rod, the second section is provided with the spiral transverse rib, and the end part of the anchor rod body is provided with the drill bit for drilling; the flow mixer arranged in the anchor rod body enables the anchoring agent to be fully mixed after passing through the anchor rod, and the anchoring force of the anchoring agent is enhanced. The multifunctional anchor rod provided by the invention is simple in structure, can synchronously carry out drilling operation and anchor rod placement, improves the anchor rod construction efficiency, and reduces the labor intensity of workers.

Description

Multifunctional anchor rod

Technical Field

The invention relates to the technical field of coal roadway support, in particular to a multifunctional anchor rod.

Background

The existing temporary support of the coal mine roadway mainly comprises mechanical support devices which are generally arranged on tunneling equipment, and after the roadway is tunneled, the whole newly excavated area is covered to shield falling objects for operating personnel. However, the existing temporary support plays a role in shielding and protecting after the surrounding rock deforms, and cannot generate active and rapid support force for a newly excavated area before the surrounding rock deforms.

The anchor bolt support can effectively control the deformation of surrounding rocks, and is widely applied to the fields of domestic and foreign coal mines, metal mines and the like. Taking coal mine roadway support as an example, the existing anchor bolt support process flow is as follows: and (3) punching a hole on the coal rock wall by using a drill rod, manually plugging the resin anchoring agent into the punched hole, putting the anchor rod into the hole, stirring, and pre-tightening the anchor rod after the anchoring agent is solidified. The existing anchor bolt support construction process has the main problems that: 1. the difficulty of manually plugging the anchoring agent into the drill hole is high, especially when the coal rock mass is broken and the wall of the drill hole is uneven, a large amount of time is consumed to complete the installation of the anchoring agent, so that the anchoring agent is wasted, the supporting efficiency is reduced by 2, the drill hole is reduced, the anchoring agent is installed and pre-tightening is completed by using different tools, and the time consumed for disassembling the drill rod and switching different tools is long. The existing anchor rod construction process is long in time consumption, low in efficiency, high in labor intensity of workers and high in automation realization difficulty, and cannot meet the requirement of rapid support of a coal mine tunnel.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, embodiments of the present invention propose a multifunctional anchor rod.

The multifunctional anchor rod comprises an anchor rod body, wherein the anchor rod body comprises a first section and a second section, the first section is provided with external threads, the second section is provided with a spiral transverse rib, and a drill bit is arranged at the end part, located at the second section, of the anchor rod body; the anchor rod body is internally provided with a middle hole, and a mixer for mixing anchoring agent is arranged in the middle hole.

According to the multifunctional anchor rod provided by the embodiment of the invention, the first section is used for connecting a construction machine to drill and place the anchor rod, the second section is provided with the spiral transverse rib, and the end part of the anchor rod body is provided with the drill bit for drilling; the flow mixer arranged in the anchor rod body enables the anchoring agent to be fully mixed after passing through the anchor rod, and the anchoring force of the anchoring agent is enhanced. The multifunctional anchor rod provided by the invention is simple in structure, can synchronously carry out drilling operation and anchor rod placement, improves the anchor rod construction efficiency, and reduces the labor intensity of workers.

In some embodiments of the invention, the flow mixer is disposed within the first section.

In some embodiments of the present invention, the flow mixer includes a central shaft and a helical blade, the central shaft and the helical blade are fixedly connected into a whole, the central shaft is coaxially arranged with the anchor rod body, and the helical blade is arranged around the central shaft.

In some embodiments of the present invention, the number of the flow mixers is plural, and the plural flow mixers are connected end to end.

In some embodiments of the invention, the external thread and the helical cross rib have the same or opposite directions of rotation.

In some embodiments of the invention, the first section and the second section are integrally formed.

In some embodiments of the invention, a limiting member is disposed at an end of the first section far from the second section, and a dimension of the limiting member along a radial direction of the anchor rod body is larger than a dimension of the anchor rod body along the direction.

In some embodiments of the invention, the stopper comprises a sleeve, the diameter of the inner hole of the sleeve is equal to or slightly larger than the diameter of the anchor rod body, and a flange is arranged on the outer peripheral surface of the sleeve.

In some embodiments of the invention, a pretensioning assembly is provided on the first section.

In some embodiments of the present invention, the pre-tightening assembly includes a nut and a pad, the nut is screwed on the first section, the pad is sleeved on the first section, and the pad is disposed closer to the second section than the nut.

Drawings

Fig. 1 is a schematic view of a multi-function anchor rod according to the present invention;

FIG. 2 is a cross-sectional view of the multi-function anchor of FIG. 1;

FIG. 3 is an enlarged view of a portion of the mixer of FIG. 2.

Reference numerals:

10. an anchor body; 11. a first stage; 111. an external thread; 12. a second stage; 121. a helical cross rib; 13. a mesopore; 14. a flow mixer; 141. a central shaft; 142. a helical blade; 20. a drill bit.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The multifunctional anchor rod provided by the embodiment of the invention is applied to supporting operation of coal mine tunnels, and can also be applied to scenes such as side slopes and tunnels requiring reinforcement of construction foundations.

As shown in fig. 1 to 3, the multifunctional anchor rod provided by the invention comprises an anchor rod body 10, wherein the anchor rod body 10 comprises a first section 11 and a second section 12 which are divided along the axial direction of the anchor rod body, the first section 11 is provided with an external thread 111, and the second section 12 is provided with a spiral transverse rib 121. The anchor rod body 10 is internally provided with a middle hole 13, two ends of the middle hole 13 are respectively provided with at least one slurry inlet hole and at least one slurry outlet hole which are communicated with the external environment of the anchor rod body 10, and the middle hole 13 is internally provided with a mixer 14 for mixing anchoring agent.

When carrying out the stock construction operation, at first embolia the external screw thread 111 on the first section 11 with the threaded connection spare spiral, again with threaded connection spare fixed connection in construction equipment, the power of construction equipment passes through threaded connection spare and transmits to stock body 10 to put into the country rock with stock body 10. The anchor rod body 10 end connection is driven the anchor rod body 10 through the construction equipment by drill bit 20 rotatory, and drill bit 20 carries out the drilling operation on the country rock, and along with the attack of drill bit 20, in the middle of anchor rod body 10 gets into the drilling in the lump, realizes the drilling operation and places the anchor rod and go on in step.

After the anchor rod body 10 is placed in place, the anchoring agent pump pumps the anchoring agent into the middle hole 13 from the grouting hole, the anchoring agent is firstly mixed and stirred by the mixer 14, and after being uniformly stirred, the anchoring agent continuously flows along the middle hole 13 until the anchoring agent is discharged from the grout outlet hole, fills a gap between the anchor rod body 10 and a drilled hole, and is solidified after a period of time, so that the anchoring operation is completed. When the anchoring agent flows into the gap between the anchor body 10 and the borehole, the anchoring agent flows into the spiral cross rib 121 on the second section 12, and after the anchoring agent is cured, the anchoring agent cured in the spiral cross rib 121 can increase the anchoring force between the anchor body 10 and the surrounding rock. In addition, the helical cross rib 121 also helps to evacuate debris generated by drilling as the drill bit 20 performs the drilling operation.

According to the multifunctional anchor rod provided by the embodiment of the invention, the first section is used for connecting a construction machine to drill and place the anchor rod, the second section is provided with the spiral transverse rib, and the end part of the anchor rod body is provided with the drill bit 20 for drilling; the flow mixer arranged in the anchor rod body enables the anchoring agent to be fully mixed after passing through the anchor rod, and the anchoring force of the anchoring agent is enhanced. The multifunctional anchor rod provided by the invention is simple in structure, can synchronously carry out drilling operation and anchor rod placement, improves the anchor rod construction efficiency, and reduces the labor intensity of workers.

In some embodiments of the present invention, the mixer 14 is disposed in the first section 11 near the grouting hole, the anchoring agent flows in from the grouting hole and flows out from the grout outlet, and the mixer 14 is disposed near the grouting hole, so that the anchoring agent starts mixing and stirring at the initial stage of entering the middle hole 13.

In some embodiments of the present invention, the mixer 14 includes a central shaft 141 and a helical blade 142 fixedly connected together, the central shaft 141 is disposed coaxially with the bolt body 10, and the helical blade 142 is disposed around the central shaft 141. When flowing in the mixer 14, the anchoring agent is guided by the helical blade 142, and the flow path of the anchoring agent is helical, so that the anchoring agent rotates around the central shaft 141 continuously, and the function of mixing the anchoring agent is achieved. Meanwhile, when the anchoring agent flows along the axial direction, the anchoring agent impacts the spiral blades 142 to generate turbulence, and the mixing effect is enhanced.

In some embodiments of the present invention, there are a plurality of flow mixers 14, and a plurality of flow mixers 14 are connected end to end. The length of the anchoring agent flowing through the flow mixer 14 affects the mixing effect of the anchoring agent, and the longer the length of the anchoring agent flowing through the flow mixer 14 is, the better the mixing effect is; the shorter the length of the anchoring agent flow through the flow mixer 14, the greater the anchoring agent flow rate at a constant anchoring agent pump power. For anchoring agents with different properties or different construction requirements, the mixing requirements of the anchoring agents are different, and the mixing effect of the flow mixer 14 on the anchoring agents is changed by adjusting the number of the flow mixers 14. The multiple flow mixers 14 can be mutually independent and are fixedly connected into a whole by welding, clamping and the like before being placed into the middle hole 13; the plurality of mixers 14 may also be manufactured together as one piece in opposition at the time of manufacture.

In some embodiments of the present invention, the second segment 12 is provided with a spiral cross rib 121, and the rotation directions of the external thread 111 and the spiral cross rib 121 are the same or opposite. The external thread 111 and the spiral transverse rib 121 have the same rotating direction, and are convenient to process and construct. When the external thread 111 and the spiral transverse rib 121 are rotated in opposite directions, the spiral transverse rib 121 can compress the anchoring agent when the anchor body 10 rotates, thereby improving the anchoring strength.

In some embodiments of the present invention, the first section 11 and the second section 12 are integrally formed, so that stress concentration and metal fiber fracture caused by secondary processing or assembly are avoided, the performance of the anchor rod is improved, and the cost of the anchor rod is reduced.

In some embodiments of the present invention, the drill bit 20 and the anchor rod body 10 may be integrally formed, which can avoid stress concentration and metal fiber fracture caused by secondary processing or assembly, improve the performance of the anchor rod body 10 and the drill bit 20, and reduce the cost of the multifunctional anchor rod. The drill bit 20 and the anchor rod body 10 may also be independent components, and are assembled into a whole by means of screw connection, welding, clamping, and the like.

In some embodiments of the invention, the end of the first section 11 remote from the second section 12 is provided with a limiting member, and the size of the limiting member along the radial direction of the anchor rod body 10 is larger than the size of the anchor rod body 10 along the direction. After anchor rod body 10 was put into the drilling and reached certain length, locating part and country rock butt formed the backstop, prevented anchor rod body 10 further entering drilling for anchor rod body 10 has the exact position.

In some embodiments of the invention, the retaining member comprises a sleeve, the diameter of the inner hole of the sleeve is equal to or slightly larger than that of the anchor rod body 10, the outer diameter of the sleeve is slightly smaller than the size of the drilled hole, and a flange is arranged on the outer peripheral surface of the sleeve. After the anchor rod body 10 is placed into the drilled hole and reaches a certain length, the sleeve enters the drilled hole to play a guiding role, the flange abuts against the surrounding rock and forms a stop, and the anchor rod body 10 is prevented from further entering the drilled hole. Alternatively, the limiting member may be in other forms, such as a limiting nail disposed along the radial direction of the anchor rod body 10.

In some embodiments of the invention, a pretensioning assembly is provided on the first section 11. During the construction operation of the anchor rod body 10, a certain pre-tightening force needs to be applied to the anchor rod body 10 to improve the supporting effect of the anchor rod body 10. When sending into the stock body 10 in the drilling, the pretension subassembly advances along with the stock body 10 together, puts in place until the stock body 10 gets into the drilling, and pretension subassembly butt is in country rock, and after the anchoring agent solidification, the construction equipment drives the pretension subassembly and rotates, realizes the pretension to the stock body 10. Optionally, the pre-tightening assembly comprises a nut and a washer, the nut is connected to the first section 11 through threads, and the washer is arranged between the nut and the surrounding rock. After the anchoring agent is solidified, the anchor rod body 10 is fixed, and the construction machine drives the nut to rotate, so that the nut rotates and moves to surrounding rocks along the anchor rod body 10, the cushion disc is compressed, pretightening force is provided, and pretightening is completed.

Referring to fig. 1 to 3, a multi-functional anchor according to an embodiment of the present invention will be described in detail in one specific embodiment. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting.

The first embodiment is as follows:

as shown in fig. 1 to 3, in the present embodiment, the multifunctional anchor rod includes an anchor rod body 10, the anchor rod body 10 is cylindrical, and the anchor rod body 10 is an integral body manufactured by integral molding. The stock body 10 is along including first section 11 and the second section 12 of following self axial division, is provided with external screw thread 111 on the first section 11, is provided with heliciform cross rib 121 on the second section 12, and the direction of rotation of external screw thread 111 and heliciform cross rib 121 is the same, and the stock body 10 is provided with a drill bit 20 on being located the tip of second section 12 department. The anchor rod body 10 is internally provided with a middle hole 13, two ends of the middle hole 13 are respectively provided with a slurry inlet hole and a slurry outlet hole which are communicated with the external environment of the anchor rod body 10, the slurry inlet hole is positioned at the end surface of the first section 11 of the anchor rod body 10, and the slurry outlet hole is positioned at the end surface of the second section 12 of the anchor rod body 10.

A mixer 14 for mixing the anchoring agent is arranged in the middle hole 13, and the mixer 14 is arranged in the first section 11 close to the grouting hole. The mixer 14 includes a central shaft 141 and a spiral blade 142 which are fixedly connected together, the central shaft 141 is disposed coaxially with the anchor body 10, and the spiral blade 142 is disposed around the central shaft 141.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A multifunctional anchor rod is characterized by comprising an anchor rod body, wherein the anchor rod body comprises a first section and a second section, the first section is provided with an external thread, the second section is provided with a spiral transverse rib, and a drill bit is arranged at the end part of the anchor rod body, which is positioned at the second section; the anchor rod body is internally provided with a middle hole, and a mixer for mixing anchoring agent is arranged in the middle hole.

2. A multi-function rock bolt according to claim 1, wherein the flow mixer is disposed within the first section.

3. A multi-function anchor according to claim 2, wherein the flow mixer includes a central shaft and helical vanes fixedly secured together, the central shaft being disposed coaxially with the anchor body, the helical vanes being disposed about the central shaft.

4. A multi-function rock bolt according to claim 1, wherein the number of the flow mixers is plural, and plural flow mixers are connected end to end.

5. A multi-function anchor according to any one of claims 1 to 4, wherein the external thread and the helical cross rib have the same or opposite sense of rotation.

6. A multi-function anchor according to any one of claims 1 to 4, wherein the first and second sections are integrally formed.

7. A multifunctional bolt according to any one of claims 1 to 4, wherein the end of the first section remote from the second section is provided with a stop, the dimension of which in the radial direction of the bolt body is greater than the dimension of the bolt body in that direction.

8. A multi-function anchor according to claim 7, wherein the retaining member comprises a sleeve having an inner bore diameter equal to or slightly greater than the anchor body diameter, the sleeve having a flange provided on an outer peripheral surface thereof.

9. A multi-function anchor according to any one of claims 1 to 4, wherein the first section is provided with a pre-tensioning assembly.

10. A multi-function anchor as claimed in claim 9, wherein the pre-tightening assembly includes a nut and a washer, the nut is screwed on the first section, the washer is sleeved on the first section, and the washer is disposed closer to the second section than the nut.