CN223398702U - Energy-absorbing anchor rod suitable for high-stress rock mass support - Google Patents
Energy-absorbing anchor rod suitable for high-stress rock mass supportInfo
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- CN223398702U CN223398702U CN202422324828.4U CN202422324828U CN223398702U CN 223398702 U CN223398702 U CN 223398702U CN 202422324828 U CN202422324828 U CN 202422324828U CN 223398702 U CN223398702 U CN 223398702U
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Abstract
本申请提供了一种适用于高应力岩体支护的吸能锚杆，属于金属矿床地下岩体支护技术领域。该吸能锚杆包括杆体；杆体包括用于插入岩体的锚杆孔内的锚固段和位于锚杆孔外的临空段；杆体的临空段中由外向内依次设置有紧固螺母和第一吸能结构，第一吸能结构包括套设于所述杆体外侧的基座；杆体的锚固段中设置有第二吸能结构，第二吸能结构为套设于杆体外侧的管状结构；杆体的锚固段的中部呈麻花状结构。本申请提供的吸能锚杆通过设置第一吸能结构、第二吸能结构和麻花状结构，能够形成多级吸能结构。在高应力岩体的大变形释能过程中，该多级吸能结构能够有效进行吸能让压，从而达到恒阻效果，为锚杆提供稳定的支护力，以满足高应力岩体的支护需求。
The present application provides an energy-absorbing anchor suitable for supporting high-stress rock masses, which belongs to the technical field of underground rock support in metal deposits. The energy-absorbing anchor includes a rod body; the rod body includes an anchoring section for inserting into the anchor hole of the rock mass and an air-facing section located outside the anchor hole; a fastening nut and a first energy-absorbing structure are sequentially provided in the air-facing section of the rod body from the outside to the inside, and the first energy-absorbing structure includes a base sleeved on the outside of the rod body; a second energy-absorbing structure is provided in the anchoring section of the rod body, and the second energy-absorbing structure is a tubular structure sleeved on the outside of the rod body; the middle part of the anchoring section of the rod body is a twisted structure. The energy-absorbing anchor provided by the present application can form a multi-stage energy-absorbing structure by providing a first energy-absorbing structure, a second energy-absorbing structure and a twisted structure. During the large deformation and energy release process of the high-stress rock mass, the multi-stage energy-absorbing structure can effectively absorb and release pressure, thereby achieving a constant resistance effect, providing a stable support force for the anchor rod, and meeting the support requirements of the high-stress rock mass.
Description
Technical Field
The application relates to the technical field of metal ore deposit underground rock mass support, in particular to an energy-absorbing anchor rod suitable for high-stress rock mass support.
Background
Deep rock mass engineering often faces the problem of 'three high and one disturbance', so that the deep rock mass engineering is extremely easy to destabilize. The high stress has a great influence on the stability of the rock mass, and the key for improving the stability of the high stress rock mass is to release the ground stress of the stratum where the roadway is located and absorb the extrusion deformation of the rock mass.
At present, the supporting anchor rods such as the traditional resin anchor rods and the traditional pipe seam anchor rods only play a simple supporting role, are relatively insufficient in large deformation resistance, are easy to fail when the rock mass is excessively deformed, cannot provide constant resistance, and are only suitable for environments with low stress. In order to meet the supporting requirement of a high-stress rock mass, a patent with a publication number of CN219431862U provides a mortar anchor rod suitable for supporting high-stress surrounding rock, the sliding surface of the anchor rod head is connected with an expansion head, a top clamp is placed at the upper end of the expansion head, a protective sleeve is sleeved on the outer side of the expansion head and the top clamp, a nut blocking pad is arranged on the lower part of the expansion head, one end of a rod body, far away from the anchor rod head, is sequentially connected with a grout stop plug, a tray and a threaded cap from left to right, an anti-pulling barb is welded at the end head of the expansion head, and an anti-corrosion layer is coated on the outer side of the rod body. The patent provides a permanent support force to the anchor by ensuring its corrosion resistance in a salt water environment for use in the support of high stress surrounding rock, but this approach does not provide an effective energy absorbing effect.
In view of this, there is still a need to provide an energy absorbing rock bolt suitable for high stress rock mass support.
Disclosure of Invention
In view of the technical problems in the background art, the application provides an energy-absorbing anchor rod suitable for supporting a high-stress rock mass. In the large deformation energy release process of the high-stress rock mass, the energy-absorbing anchor rod can be subjected to yielding through a multi-stage energy-absorbing structure, so that a constant resistance effect is achieved, and stable supporting force is provided for the anchor rod.
The embodiment of the application provides an energy-absorbing anchor rod suitable for supporting a high-stress rock mass, which comprises a rod body, wherein the rod body comprises an anchoring section used for being inserted into an anchor rod hole of the rock mass and a temporary section positioned outside the anchor rod hole, a fastening nut and a first energy-absorbing structure are sequentially arranged in the temporary section of the rod body from outside to inside, the first energy-absorbing structure comprises a base sleeved outside the rod body, a second energy-absorbing structure is arranged in the anchoring section of the rod body, the second energy-absorbing structure is a tubular structure sleeved outside the rod body, and the middle part of the anchoring section of the rod body is of a twist structure.
According to the technical scheme, the first energy-absorbing structure is arranged at the temporary section of the rod body and is used for bearing stress released when the high-stress rock mass is deformed greatly, meanwhile, the second energy-absorbing structure is arranged at the anchoring section of the rod body, so that the tight extrusion between the rod body and the second energy-absorbing structure can be utilized to achieve a constant-resistance energy-absorbing effect, and on the basis, the middle part of the anchoring section of the rod body is arranged in a twist shape, the ductility of the rod body and the reducing effect of the twist-shaped structure can be utilized to achieve the constant-resistance energy-absorbing effect as the third energy-absorbing structure, so that the multistage energy-absorbing effect formed by the first energy-absorbing structure, the second energy-absorbing structure and the third energy-absorbing structure is utilized to provide stable and efficient supporting force for the anchor rod, and the supporting requirement of the high-stress rock mass is met.
In some embodiments, the base is in a circular ring structure, the outer diameter of the base is larger than the aperture of the anchor rod hole, and the inner diameter of the base is consistent with the outer diameter of the rod body.
In this embodiment, the first energy absorbing structure is located outside the anchor hole and is configured to withstand a stress released along an axial direction of the rod body when the first energy absorbing structure is highly stressed and is greatly deformed. Meanwhile, as the inner diameter of the base is consistent with the outer diameter of the rod body, the rod body can be limited to a certain extent, and the rod body can be kept in a centered state conveniently.
In some embodiments, the first energy absorbing structure further comprises a circular boss arranged on the inner side of the base, wherein the outer diameter of the boss is consistent with the aperture of the anchor rod hole, and the inner diameter of the boss is consistent with the outer diameter of the rod body.
In this embodiment, boss in the first energy-absorbing structure can stretch into inside the stock hole, forms the block structure with the stock hole, prevents that first energy-absorbing structure from taking place the skew along the radial of body of rod, has higher stability. And the first energy-absorbing structure keeps stable, and simultaneously, can further limit the rod body to make it keep the intermediate state.
In some embodiments, the outer wall of the rod body is provided with a convex strip extending along the axial direction, the second energy absorbing structure is sleeved on the outer side of the convex strip, the second energy absorbing structure comprises a first section and a second section along the axial direction, a groove matched with the convex strip is arranged in the first section, the inner diameter of the first section is consistent with the outer diameter of the rod body, and the inner diameter of the second section is consistent with the diameter of the circumference formed by the outer wall of the convex strip.
In the embodiment, the convex strips on the outer wall of the rod body can be clamped with the grooves in the first section, the convex strips on the outer wall of the rod body enter the second section through the grooves by moving the rod body, and then the rod body is rotated to enable the positions of the convex strips to be staggered from the positions of the grooves, so that the convex strips and the first section can form an abutting state.
In some embodiments, the first segment is located on a side of the second energy absorbing structure proximate to the void-facing segment.
In this embodiment, when the rock mass is deformed toward the free surface, under the action of the anchoring agent, a trend of relative movement is generated between the rod body and the second energy-absorbing structure, so that the rod body moves toward the free surface relative to the second energy-absorbing structure, and the convex strips on the outer side of the rod body are tightly extruded with the first segments, so that the constant-resistance energy-absorbing effect is achieved.
In some embodiments, the second energy absorbing structure comprises two groups, one group being disposed on each side of the twist structure.
In the embodiment, the constant resistance energy absorption effect of the two groups of second energy absorption structures can be effectively improved, so that a better anchoring effect is achieved.
In some embodiments, a spacing structure is further provided on the outside of the second energy absorbing structure.
In this embodiment, the spacing structure is provided to facilitate limiting the position of the rod body within the anchor rod hole.
In some embodiments, the limiting structure is annular and sleeved on the outer side of the second energy absorption structure, the inner diameter of the limiting structure is consistent with the outer diameter of the second energy absorption structure, and the outer diameter of the limiting structure is consistent with the aperture of the anchor rod hole where the rod body is located.
In this embodiment, the setting of limit structure can make the body of rod be in the state of centering in the stock hole to improve the anchor force of stock.
In some embodiments, a tray is also disposed between the fastening nut and the first energy absorbing structure.
In this embodiment, through setting up the tray, can effectively improve the area of contact of stock and rock mass to improve the supporting effect.
In some embodiments, the first energy absorbing structure is made of foamed aluminum.
In the embodiment, the first energy absorption structure made of the foamed aluminum material can more effectively bear the stress released when the high-stress rock mass is deformed, and the energy absorption effect is improved.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
In order to more clearly illustrate the technical solution of the present application, the following description will briefly explain the drawings used in the present application. It is apparent that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of an energy absorbing anchor adapted for high stress rock mass support in accordance with an embodiment of the present application;
FIG. 2 is a schematic diagram of a first energy absorbing structure according to an embodiment of the present application;
FIG. 3 is a schematic view of a structure of a protrusion on an outer wall of a shaft according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a second energy absorbing structure according to an embodiment of the present application;
FIG. 5 is a cross-sectional view A-A of FIG. 3;
Fig. 6 is a sectional view of B-B of fig. 3.
The reference numerals indicate that 1, a rod body, 11, a twist structure, 12, a convex strip, 2, a fastening nut, 3, a tray, 4, a first energy absorption structure, 41, a base, 42, a boss, 5, a second energy absorption structure, 51, a groove, 6, a limiting structure, 7, an anchor rod hole, 8 and an anchoring agent.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
Unless defined otherwise, 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 for the purpose of describing particular embodiments only and are not intended to be limiting of the application, and the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the above description of the drawings are intended to cover non-exclusive inclusions.
In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the azimuth or positional relationship indicated by the technical terms "length", "upper", "lower", "inner", "outer", "axial", "radial", "circumferential", etc., are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the embodiments of the present application.
In order to solve the technical problem that the existing anchor rod is not suitable for supporting high-stress rock mass due to poor energy absorption effect, the application provides the energy absorption anchor rod suitable for supporting the high-stress rock mass, and the multistage energy absorption structure is arranged for yielding, so that the constant resistance effect is achieved, stable supporting force is provided for the anchor rod, and the supporting requirement of the high-stress rock mass is met.
Referring to fig. 1, an embodiment of the application provides an energy-absorbing anchor rod suitable for supporting a high-stress rock mass, which comprises a rod body 1, wherein the rod body 1 comprises an anchoring section for being inserted into an anchor rod hole 7 of the rock mass and a temporary section positioned outside the anchor rod hole 7, a fastening nut 2 and a first energy-absorbing structure 4 are sequentially arranged in the temporary section of the rod body 1 from outside to inside, the first energy-absorbing structure 4 comprises a base 41 sleeved outside the rod body 1, a second energy-absorbing structure 5 is arranged in the anchoring section of the rod body 1, the second energy-absorbing structure 5 is a tubular structure sleeved outside the rod body 1, and the middle part of the anchoring section of the rod body 1 is in a twist structure 11.
In the technical scheme of the embodiment of the application, the first energy-absorbing structure 4 is arranged at the temporary section of the rod body 1 and is used for bearing the stress released when the high-stress rock mass is deformed greatly, meanwhile, the second energy-absorbing structure 5 is arranged at the anchoring section of the rod body 1, so that the tight extrusion between the rod body 1 and the second energy-absorbing structure 5 can be utilized to play a role in constant resistance energy absorption, and on the basis, the middle part of the anchoring section of the rod body 1 is arranged in a twist shape, the ductility of the rod body 1 and the reducing effect of the twist-shaped structure 11 can be utilized to play a role in constant resistance energy absorption as a third energy-absorbing structure, so that the multistage energy-absorbing effect formed by the first energy-absorbing structure 4, the second energy-absorbing structure 5 and the third energy-absorbing structure is utilized to provide stable and efficient supporting force for the anchor rod, and the supporting requirement of the high-stress rock mass is met.
Further, in some embodiments of the present application, the base 41 has a circular ring structure, the outer diameter of the base 41 is larger than the aperture of the anchor rod hole 7, and the inner diameter of the base 41 is consistent with the outer diameter of the rod body 1. Further, as shown in fig. 2, the first energy absorbing structure 4 further includes an annular boss 42 disposed inside the base 41, the outer diameter of the boss 42 is consistent with the aperture of the anchor rod hole 7, and the inner diameter of the boss 42 is consistent with the outer diameter of the rod body 1.
By the mode, the base 41 in the first energy-absorbing structure 4 is positioned outside the anchor rod hole 7 and is used for bearing stress released along the axial direction of the rod body 1 when high stress and large deformation are carried out, the boss 42 in the first energy-absorbing structure 4 can extend into the anchor rod hole 7 and form a clamping structure with the anchor rod hole 7, so that the first energy-absorbing structure 4 is prevented from deviating along the radial direction of the rod body 1, and the stability is higher. Meanwhile, as the inner diameter of the base 41 and the inner diameter of the boss 42 are consistent with the outer diameter of the rod body 1, a certain limiting effect can be achieved on the rod body 1, and the rod body 1 can be kept in a centered state conveniently.
The outer diameters of the rod body 1 in the present application refer to the outer diameter of the main body portion of the rod body 1, and the main body portion does not include the twist structure 11 having the reducing effect.
In some embodiments of the present application, the material of the first energy absorbing structure 4 is preferably foamed aluminum, so as to more effectively bear the stress released when the high-stress rock mass is deformed, and improve the energy absorbing effect. The brand and model of the aluminum foam can be selected according to actual needs, and the application is not limited to the above. In addition, the base 41 and the boss 42 in the first energy absorbing structure 4 may be integrally formed, or may be formed by combining them, and may be selected according to actual needs.
Further, referring to fig. 3-6, in some embodiments of the present application, an axially extending protrusion 12 is disposed on an outer wall of the rod body 1, the second energy absorbing structure 5 is sleeved on an outer side of the protrusion 12, the second energy absorbing structure 5 includes a first segment and a second segment along an axial direction, a groove 51 matched with the protrusion 12 is disposed in the first segment, an inner diameter of the first segment is consistent with an outer diameter of the rod body 1, and an inner diameter of the second segment is consistent with a diameter of a circumference formed by the outer wall of the protrusion 12.
Still further, the first segment is located on a side of the second energy absorbing structure 5 near the temporary segment, and the first segment is consistent with the second segment in length. That is, the upper half of the second energy absorbing structure 5 is a first section and the lower half is a second section.
In the above embodiment, the first segment is a hollow tubular structure with a groove 51 on the inner wall, and the second segment is a conventional hollow tubular structure, preferably the outer diameters of the first segment and the second segment are equal, and the first segment and the second segment may be integrally formed or combined.
The convex strip 12 on the outer wall of the rod body 1 can be clamped with the groove 51 in the first section, the convex strip 12 on the outer wall of the rod body 1 enters the second section through the groove 51 by moving the rod body 1, then the rod body 1 or the second energy absorbing structure 5 is rotated, the position of the convex strip 12 is staggered from the position of the groove 51, the convex strip 12 and the first section can form an abutting state, and at the moment, the friction force between the inner wall of the first section and the rod body 1 can still keep the second energy absorbing structure 5 and the rod body 1 stable. When the rock mass is deformed towards the free surface, under the action of the anchoring agent 8, the relative movement trend is generated between the rod body 1 and the second energy absorption structure 5, so that the rod body 1 moves towards the free surface relative to the second energy absorption structure 5, the convex strips 12 on the outer side of the rod body 1 are tightly extruded with the first sections, and the constant-resistance energy absorption effect is achieved.
In the embodiment of the present application, the number and arrangement positions of the protruding strips 12 can be selected according to the needs, and the number and positions of the grooves 51 in the first segment are matched with those of the protruding strips 12. For example, in some embodiments of the present application, two opposite protruding strips 12 may be arranged and may be connected in a "one" shape, four protruding strips 12 may be arranged and uniformly distributed along the circumferential direction of the rod body 1, two opposite protruding strips may be connected to form a "cross" shape, eight protruding strips 12 may be arranged and uniformly distributed along the circumferential direction of the rod body 1, and two opposite protruding strips may be connected to form a "rice" shape.
Further, in some embodiments of the present application, the second energy absorbing structures 5 are arranged in two groups, and the two groups of energy absorbing structures are respectively arranged at two axial sides of the twist-shaped structure 11. By the arrangement, the constant resistance energy absorption effect can be improved more effectively, so that a better anchoring effect is achieved.
Further, in some embodiments of the present application, a limiting structure 6 is further disposed on the outer side of the second energy absorbing structure 5. The limiting structure 6 is preferably annular and sleeved on the outer side of the second energy absorption structure 5, the inner diameter of the limiting structure 6 is consistent with the outer diameter of the second energy absorption structure 5, and the outer diameter of the limiting structure 6 is consistent with the aperture of the anchor rod hole 7 where the rod body 1 is located. Because whether the anchor rod is centered has a larger influence on the anchoring force provided by the anchor rod, the highest anchoring force can be reduced by 50% when the centering degree is poor, and the rod body 1 is in a centered state in the anchor rod hole 7 by arranging the limiting structure 6 in the embodiment of the application. And, based on the cooperation of the first energy absorbing structure 4 and the limiting structure 6 shown in fig. 2, two points can be lined up, and absolute centering of the anchor rod can be ensured more effectively, so that stable and efficient anchoring force is provided, and the anchoring effect of the anchor rod is improved.
Further, in some embodiments of the application, a tray 3 is also provided between the fastening nut 2 and the first energy absorbing structure 4. So set up, can effectively improve the area of contact of stock and rock mass to improve the supporting effect.
The working principle of the energy-absorbing anchor rod suitable for supporting the high-stress rock mass provided by the embodiment of the application is specifically described as follows:
When the energy-absorbing anchor rod is assembled, the second energy-absorbing structure 5 is sleeved outside the convex strips 12 of the rod body 1, so that the grooves 51 in the first sections in the second energy-absorbing structure 5 are clamped with the convex strips 12, then the rod body 1 or the second energy-absorbing structure 5 is moved along the length direction of the convex strips 12, so that the convex strips 12 are positioned in the second sections, then the rod body 1 or the second energy-absorbing structure 5 is rotated, the positions of the convex strips 12 and the grooves 51 are staggered, and the convex strips 12 and the first sections form an abutting state, so that the assembly of the second energy-absorbing structure 5 is completed.
In installing an energy absorbing rock bolt in a high stress rock mass, it is first necessary to drill a bolt hole 7 in the high stress rock mass. In some embodiments of the present application, the diameter of the anchor rod hole 7 is preferably 30-40 mm, and the depth is more than 1.5 m. After drilling the anchor hole 7, an anchoring agent 8 is added to the anchor hole 7, and the anchoring agent 8 may be a resin anchoring agent 8, a rapid hardening cement mortar anchoring agent 8, or the like. Then the tip of the rod body 1 stretches into the anchor rod hole 7, the first energy absorbing structure 4 is placed at the temporary section of the rod body 1, the boss 42 in the first energy absorbing structure 4 is embedded into the anchor rod hole 7, and the rod body 1 is in a centered state under the combined action of the limiting structure 6 at the outer side of the second energy absorbing structure 5 and the first energy absorbing structure 4. And then the tray 3 and the fastening nut 2 are sequentially installed, and after the fastening nut 2 is screwed, the installation of the energy-absorbing anchor rod is completed.
By the mode, the first energy-absorbing structure 4 can bear stress released when the high-stress rock mass is deformed greatly so as to ensure the confining force provided by the tray 3 and the fastening nut 2, when the rock mass is deformed towards the free surface, the second energy-absorbing structure 5 and the rod body 1 can be tightly extruded to play a role in constant resistance energy absorption, and the third energy-absorbing structure can further improve the effect of constant resistance energy absorption by utilizing the ductile deformation of the metal of the rod body 1 and the reducing effect of the twist-shaped structure 11. The multistage energy-absorbing structure formed by the energy-absorbing structures can play a good role in energy absorption and pressure release in the deformation and energy release process of the high-stress rock mass, so that the energy-absorbing anchor rod has a stable anchoring effect.
In summary, the application provides an energy-absorbing anchor rod suitable for supporting high-stress rock mass, and belongs to the technical field of underground rock mass supporting of metal ore beds. The energy-absorbing anchor rod comprises a rod body 1, wherein the rod body 1 comprises an anchoring section used for being inserted into an anchor rod hole 7 of a rock body and a temporary space section located outside the anchor rod hole 7, a fastening nut 2 and a first energy-absorbing structure 4 are sequentially arranged in the temporary space section of the rod body 1 from outside to inside, the first energy-absorbing structure 4 comprises a base 41 sleeved on the outer side of the rod body 1, a second energy-absorbing structure 5 is arranged in the anchoring section of the rod body 1, the second energy-absorbing structure 5 is a tubular structure sleeved on the outer side of the rod body 1, and the middle part of the anchoring section of the rod body 1 is in a twist structure 11. The energy-absorbing anchor rod provided by the application can form a multi-stage energy-absorbing structure by arranging the first energy-absorbing structure 4, the second energy-absorbing structure 5 and the twist-shaped structure 11. In the large deformation energy release process of the high-stress rock mass, the multistage energy absorption structure can effectively absorb energy and release pressure, so that a constant resistance effect is achieved, stable supporting force is provided for the anchor rod, and the supporting requirement of the high-stress rock mass is met.
The present application is not limited to the above embodiment. The above embodiments are merely examples, and embodiments having substantially the same configuration and the same effects as those of the technical idea within the scope of the present application are included in the technical scope of the present application. Further, various modifications that can be made to the embodiments and other modes of combining some of the constituent elements in the embodiments, which are conceivable to those skilled in the art, are also included in the scope of the present application within the scope not departing from the gist of the present application.
Claims (6)
1. The energy-absorbing anchor rod suitable for supporting the high-stress rock mass comprises a rod body and is characterized in that the rod body comprises an anchoring section used for being inserted into an anchor rod hole of the rock mass and a temporary section positioned outside the anchor rod hole, wherein a fastening nut and a first energy-absorbing structure are sequentially arranged in the temporary section of the rod body from outside to inside, the first energy-absorbing structure comprises a base sleeved on the outer side of the rod body, a second energy-absorbing structure is arranged in the anchoring section of the rod body, and the second energy-absorbing structure is a tubular structure sleeved on the outer side of the rod body;
The first energy absorption structure also comprises a circular boss arranged on the inner side of the base, wherein the outer diameter of the boss is consistent with the aperture of the anchor rod hole, and the inner diameter of the boss is consistent with the outer diameter of the rod body;
The second energy absorption structure is sleeved on the outer side of the raised strip, the second energy absorption structure comprises a first section and a second section along the axial direction, a groove matched with the raised strip is formed in the first section, the inner diameter of the first section is consistent with the outer diameter of the rod body, the inner diameter of the second section is consistent with the diameter of the circumference formed by the outer wall of the raised strip, and the first section is positioned on one side, close to the adjacent section, of the second energy absorption structure.
2. The energy absorbing rock bolt of claim 1, wherein the second energy absorbing structure includes two sets, one set on each side of the twist structure.
3. The energy absorbing rock bolt of claim 1, wherein the outer side of the second energy absorbing structure is further provided with a spacing structure.
4. The energy-absorbing anchor rod suitable for supporting high-stress rock mass according to claim 3, wherein the limiting structure is annular and sleeved on the outer side of the second energy-absorbing structure, the inner diameter of the limiting structure is identical with the outer diameter of the second energy-absorbing structure, and the outer diameter of the limiting structure is identical with the aperture of an anchor rod hole where the rod body is located.
5. The energy absorbing rock bolt adapted for use in high stress rock mass support of claim 1, wherein a tray is further provided between the fastening nut and the first energy absorbing structure.
6. The energy absorbing rock bolt adapted for use in high stress rock mass support of claim 1, wherein the first energy absorbing structure is aluminum foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422324828.4U CN223398702U (en) | 2024-09-24 | 2024-09-24 | Energy-absorbing anchor rod suitable for high-stress rock mass support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422324828.4U CN223398702U (en) | 2024-09-24 | 2024-09-24 | Energy-absorbing anchor rod suitable for high-stress rock mass support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223398702U true CN223398702U (en) | 2025-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202422324828.4U Active CN223398702U (en) | 2024-09-24 | 2024-09-24 | Energy-absorbing anchor rod suitable for high-stress rock mass support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223398702U (en) |
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2024
- 2024-09-24 CN CN202422324828.4U patent/CN223398702U/en active Active
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