A new type of triangular pyramid-like energy releasing anchor rod and its anchoring method

Abstract

The application discloses a novel triangular pyramid type energy releasing anchor rod and an anchoring method thereof, and relates to the technical field of rock bolting, and can be used for releasing dynamic energy under high stress, rock burst (impact pressure) and brittle-ductile large deformation. The anchor rod body is of a three-section integrated structure, the front end part is a triangular pyramid type section capable of releasing dynamic energy through tensile or shearing deformation, the middle part is an anchoring section straight rod section, and the rear end part is a threaded connection section. The cross section of the triangular pyramid type section is triangular, each side of the triangular section is provided with an outwardly arranged arc convex surface, and the length direction of the triangular pyramid type section is of a cone structure with the front part being large and the rear part being small. The threaded connection section is sequentially provided with a supporting plate, a gasket and a nut. The application can ensure that the anchor rod can produce overall sliding under high stress, rock burst (impact pressure) and brittle-ductile large deformation, can ensure multi-point horizontal resistance anchoring, can release dynamic impact energy, and can keep the rock mass stable.

Description

Technical Field

[0001] This invention relates to the field of support technology for mining engineering, underground engineering and tunnel engineering, specifically a novel triangular pyramid-shaped energy-releasing anchor and its anchoring method, which plays a supporting role in rockburst disaster control and surrounding rock stability control, and can also release dynamic impact kinetic energy. Background Technology

[0002] Anchor bolts are rod-shaped structures that can be anchored into the rock mass. They come in many types and are widely used, effectively controlling the stability of engineering projects. Anchor bolts can be classified by material, such as reinforcing steel, threaded steel, wood, and fiberglass. They can also be classified by anchoring method, such as expansion-shell type, slotted pipe type, hydraulic expansion anchor bolts, resin anchor bolts, and cement mortar anchor bolts. When using anchor bolt support, holes must first be drilled in the surrounding rock according to the type of anchor bolt and support parameters. The anchor bolts are then anchored into the drilled holes to enhance the stability of the surrounding rock. Anchor bolt support is widely used in underground mines and underground engineering projects both domestically and internationally due to its simplicity, effectiveness, and low cost. However, with the increasing depth of metal mining and the resulting increase in ground stress, under the complex geological conditions of high altitude, high humidity, and high temperature, high temperature, high humidity, and high risk of disturbance, conventional friction-type and mechanical anchor bolt support for roadways (tunnels) is no longer effective in controlling the stability of the surrounding rock, easily leading to equipment damage, personnel casualties, and loss of mineral resources. Therefore, developing energy-releasing anchors suitable for high stress, rockburst (rock burst) or large deformation of brittle-ductile rock masses has become an inevitable trend for future development.

[0003] The scientific phenomena of the engineering response of surrounding rock in deep mine tunnels can be categorized into two types based on their causes: static and dynamic. Static characteristics manifest as brittle rock failure without dynamic ejection in the surrounding rock of deep tunnels; dynamic characteristics manifest as rockburst phenomena such as rock fragment ejection and collapse in deep mines. Rockburst is a dynamic instability process that occurs when the static stability conditions of the rock mass are broken. The dynamic response characteristics of the surrounding rock surface induced by rockburst are mainly manifested as: sound during failure, manifested as spalling, rock fragment ejection, explosive spalling, and rock mass throwing failure; its most significant dynamic failure characteristic is that rock fragments are ejected at high speed from the surface of the surrounding rock in the tunnel (mining area). A 1m thick layer of rock can be thrown into the tunnel at a speed of 5~10m / s, with a throwing distance of 10~20m. The ejection energy is 5~20KJ / m2, and the maximum ejection energy can reach 50KJ / m2. Different rockburst levels induce different dynamic responses in the rock mass. Minor rockbursts cause rocks to peel off in flakes, while strong rockbursts can violently throw boulders, and a single rockburst can throw out tons of rock blocks and fragments, seriously threatening the safety of underground workers and equipment.

[0004] In high-stress environments with a tendency for rockbursts and large deformations, dynamic characteristics become a key parameter for the selection and design of support systems. In practice, when selecting a support system, it is necessary to consider the effects of borehole diameter, environmental factors (humidity), corrosion, and cementing materials (cement or resin), and to understand the impact of these factors on different static environments. The development of new types of dynamic (yielding) support anchors (such as new conical anchors, yielding anchor cables, and yielding anchors) is extremely difficult, requiring continuous improvement based on specific conditions to meet various needs (equipment requirements, increased load-bearing capacity, higher stiffness characteristics, etc.).

[0005] As early as the 1990s, South Africa first proposed an energy-absorbing support system. South Africa invented the first energy-absorbing anchor bolt, the cone anchor bolt. The cone anchor bolt is mainly forged into a flat cone shape at one end of a round steel bar, with a thin layer of lubricating material sprayed onto the surface of the round steel bar, making the anchor bolt easy to separate under load. This type of anchor bolt is usually anchored along its entire length using cement grout or resin. When the rock anchored between the anchor plate and the cone expands, it will generate tensile force in the anchor bolt body. When the pull-out force exceeds a preset value, the cone at the anchored end will laboriously slide out of the anchor body. Therefore, the anchor bolt performs its function and absorbs the kinetic energy generated by rockbursts. Initially, the anchor bolt was designed to use cement grout anchoring, but it was later adjusted to use resin anchoring. The new cone anchor bolt, with a resin mixing function added to its end, is widely used in the support of deep shafts in Canada prone to rockburst hazards.

[0006] Internationally, the main dynamic support systems include: Durabar anchors: These are an improvement on conical anchors, featuring several folds in the smooth rod body and a smooth ring at the tail. During pull-out tests, the anchor slides along the corrugated surface under load. Its maximum sliding displacement is equal to the length of the anchor tail (approximately 0.6m), classifying it as a two-point anchor. However, dynamic testing has not been conducted on this type of anchor.

[0007] Swellex expansion bolts are a typical type of expansion bolt that anchors rock masses primarily through friction between the bolt body and the bolt hole wall. The newly developed Mn24 model Swellex bolt has good energy absorption capacity, ranging from 18 to 29 kJ.

[0008] Garford rigid anchor bolts: Primarily composed of round steel bars, an anchor head, and a coarse-threaded steel sleeve, they utilize resin anchoring. The coarse-threaded steel sleeve is mainly used for resin mixing. The engineered anchor head of this bolt can generate a large displacement. The anchor head is made of thick-walled round steel bars, pressed into the steel sleeve by 350mm. The round steel bar is compressed to its original diameter and inserted into the coarse-threaded steel sleeve. When the compressed rock between the anchor end and the support plate expands, the round steel bar is pulled out from the anchor end. After being pulled out, its anchoring force remains unchanged, and the anchor bolt can generate a displacement of 390mm.

[0009] Roofex anchors are dynamic toughness anchors, consisting of an anchoring end and a round steel bar, anchored with resin. The round steel bar slides from the anchoring end, generating a constant support resistance of 80 kN. The anchoring force of the anchor is lower than the tensile strength of the round steel bar. The dynamic load of a Roofex anchor is approximately 60 kN, and its dynamic test energy is 12 kJ~27 kJ. D-anchors consist of a round steel bar with a number of spaced anchoring points. After installation, because the anchoring points are wider than the diameter of the round steel bar, they are fixed in the anchor hole and anchored along their entire length using resin or cement grout. The bond between the round steel bar and the anchor body between two anchoring points is relatively weak. When the rock mass between the two anchoring points expands, the strength and deformation capacity of the round steel bar between the two anchoring points play a major role, resulting in a tensile length of 200 mm. When the load is 200 kN, the tensile displacement of the anchor is 100~120 mm, and the energy of the impact load is 36~39 kJ.

[0010] To this end, we need to develop a new type of energy-releasing anchor bolt that can effectively control the hazards of rockbursts, so as to achieve "explosion without collapse" and leave enough safety space to ensure the safety of workers and machinery, thus providing technical support for the safe and efficient mining of deep wells and high-stress ore bodies in my country.

[0011] When a deep-well rockburst occurs, the anchor bolts anchored in the rock mass must maintain high pull-out force while also releasing dynamic pressure. Therefore, a novel triangular pyramid-shaped energy-releasing anchor bolt has been developed to meet these requirements. The anchor bolt body consists of a triangular pyramid-shaped section, an anchoring section, a straight section, and a threaded connection section. During installation, the resin or cement cartridges placed in the anchor bolt hole are mixed using the triangular pyramid-shaped module to ensure a firm bond. The most significant feature of this novel triangular pyramid-shaped energy-releasing anchor bolt is that it possesses both the overall sliding release capability of the South African Cone anchor bolt under dynamic impact and the multi-point anchoring function of the D anchor bolt. Furthermore, the triangular pyramid-shaped module serves both as a mixing agent and an anchoring agent, generating a sliding effect between the two anchoring points. This allows the anchor bolt to move together with the surrounding rock to dissipate the kinetic energy accumulated within the surrounding rock while maintaining a high anchoring force, thus ensuring the stability of the surrounding rock and support structure. This allows the anchor bolt to maintain the stability of the roadway surrounding rock under high stress, rockburst (rockburst), and brittle-ductile large deformation. Summary of the Invention

[0012] The purpose of this invention is to overcome the defects and deficiencies of the existing technology and provide a novel triangular pyramid-shaped energy-releasing anchor and its anchoring method. This method can ensure that the anchor can slide as a whole under high stress, rockburst (rock burst) and brittle-ductile large deformation, while also ensuring multi-point lateral resistance anchoring, releasing dynamic impact energy, and maintaining rock mass stability.

[0013] To achieve the above objectives, the present invention provides the following technical solution: A novel triangular pyramidal energy-releasing anchor bolt includes an anchor bolt body, characterized in that: the anchor bolt body is a three-section integrated structure, the front end of which is a triangular pyramidal segment with multi-point anchoring and capable of releasing kinetic energy through tensile or shear deformation, the middle part is a straight anchoring section, and the rear end is a threaded connection section. The triangular pyramidal segment is formed in one piece by die casting or extrusion using a special mold after heating, and then ground after cooling; the straight anchoring section is rolled using a forging press to meet the design dimensions after heating; and the threaded connection section is formed by turning.

[0014] The cross-section of the triangular pyramid segment is triangular, and each side of the triangle has an outwardly convex arc surface in the middle. The length of the triangular pyramid segment is a pyramid structure that is larger in the front and smaller in the back. A support plate, a washer, and a nut are sequentially installed on the threaded connection section.

[0015] Furthermore, the total length of the anchor rod is 1200~4000mm, and the specific length is adjusted according to the dynamic response characteristics of the rock mass and the magnitude of the ground pressure. The length of the rod can be increased or decreased, and the length of the triangular pyramid section can be adjusted according to the actual ground pressure on site, depending on the anchoring force and the requirements of the dynamic response of the rock mass.

[0016] Furthermore, the anchor rod of the straight section of the anchorage is made of round steel with a diameter of 16mm to 32mm.

[0017] Furthermore, the thread of the threaded connection section (3) is determined according to the diameter of the anchor rod, and the length is 80mm~100mm.

[0018] Furthermore, the pallet is square or round in shape and is stamped into a bowl shape. It is made of low carbon steel and is stamped. Its specifications and dimensions are determined according to the stress of the surrounding rock.

[0019] Furthermore, the diameter of the support plate is 150mm-200mm, the thickness is 5-10mm, and the diameter of the internal circular hole depends on the diameter of the anchor rod.

[0020] Furthermore, the nut is hexagonal in shape, with its inner diameter determined by the outer diameter of the anchor bolt thread section, its length being 30mm, and its material being low-carbon steel.

[0021] Furthermore, the washer has a thickness of 0.5~1mm, and its inner diameter is determined according to the outer diameter of the anchor bolt thread section.

[0022] Furthermore, the anchoring method for the energy-releasing anchor bolt includes the following specific steps: S1. Drill anchor bolt holes within the rock mass; S2. Place anchoring agent in the anchor bolt hole. The amount of anchoring agent added depends on the requirements. Anchor the bolt by reinforcing the surrounding rock in a way that reinforces the entire length or half length. At the same time, apply a layer of release agent to the triangular pyramidal section of the energy-releasing anchor bolt. S3. Insert the triangular pyramidal section of the energy-releasing anchor rod coated with release agent into the anchor rod hole, and fix it with anchoring agent. The anchoring agent solidifies for 60~120 seconds. S4. After the anchoring agent has solidified, install the support plate, washer and nut in sequence on the threaded connection section of the energy release anchor. By adjusting the position of the support plate and nut, the preload of the anchor can be changed, and it can be locked and fixed.

[0023] Furthermore, the energy-releasing anchor can be anchored at half length or at full length, with an anchoring length between 0.5 and 3 meters; the anchor diameter is between 16 mm and 40 mm. The anchoring agent is made of resin, cement, etc., and the release agent is used as a lubricant.

[0024] Compared with the prior art, the beneficial effects of the present invention are: This invention has a simple structure, is easy to install and construct, and is very convenient for rapid on-site installation. It plays a supporting role in rockburst disaster control and surrounding rock stability control, and can also release dynamic impact energy.

[0025] Among them, the triangular pyramid-shaped section has both the function of mixing anchoring agent and anchoring function. The two anchoring points produce a sliding effect, which allows the anchor rod to move together with the surrounding rock to consume the kinetic energy accumulated in the surrounding rock, and to maintain a high anchoring force, so as to maintain the stability of the surrounding rock and the support body. Under the action of high stress, rock burst (rockburst) and brittle-ductile large deformation, the anchor rod and resin will slide rapidly and maintain a certain pull-out force, thereby ensuring the stability of the rock mass under high stress environment. At the same time, the anchor bolt itself can slide as a whole, while ensuring multi-point lateral resistance anchoring and releasing dynamic impact energy, further maintaining the stability of the rock mass. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the anchor rod structure. Figure 3 for Figure 1 Enlarged view of the local structure at point A; Figure 4 for Figure 1 Enlarged view of the local structure at point B; Figure 5 This is a schematic diagram of the cross-sectional structure of a triangular pyramid-like segment.

[0027] Figure label: 1. Triangular pyramid-shaped section; 2. Anchoring section (straight rod section); 3. Threaded connection section; 4. Arc-shaped convex surface; 5. Support plate; 6. Washer; 7. Nut. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] See appendix Figure 1-5 ; A novel triangular pyramid-shaped energy-releasing anchor bolt includes an anchor bolt body, which is a three-section integrated structure. The front end is a triangular pyramid-shaped segment 1 with multi-point anchoring and the ability to release kinetic energy through tensile or shear deformation. The middle part is a straight rod segment 2 for anchoring. The rear end is a threaded connection segment 3. The triangular pyramid-shaped segment 1 is formed by forging and turning processes. The dimensions, design positions, and shapes of the triangular pyramid-shaped segment 1 and the threaded connection segment 3 need to be designed and adjusted according to the dynamic response characteristics of the rock mass. The cross-section of the triangular pyramid-shaped segment 1 is triangular, and each side of the triangle has an outwardly oriented arc-shaped convex surface 4 in the middle. The length of the triangular pyramid-shaped segment 1 is a cone structure that is larger at the front and smaller at the back. A support plate 5, a washer 6, and a nut 7 are installed sequentially on the threaded connection segment 3.

[0030] The above structure is based on rock dynamics, the principle of energy accumulation and dissipation, and the role of anchor bolt support. It has the overall slip release capability of South African cone anchor bolts under dynamic impact, as well as the multi-point anchoring function of D anchor bolts. Furthermore, the triangular pyramid-like structure has both the function of mixing anchoring agent and anchoring function. Slippage occurs between the two anchoring points, which allows the anchor bolt to move together with the surrounding rock to dissipate the kinetic energy accumulated inside the surrounding rock, while maintaining a high anchoring force to keep the surrounding rock and support body stable. This ensures the stability of the surrounding rock in the tunnel under high stress, rockburst (rock burst), and brittle-ductile large deformation.

[0031] The total length of the anchor rod is 1200~4000mm. The specific length is adjusted according to the dynamic response characteristics of the rock mass and the magnitude of the ground pressure. The length of the rod may be increased or decreased. The length of the triangular pyramid section is adjusted according to the actual ground pressure on site, as well as the anchoring force and the dynamic response requirements of the rock mass.

[0032] The anchor rod of the straight section 2 is made of round steel with a diameter of 16mm to 32mm; the thread of the threaded connection section 3 is determined according to the diameter of the anchor rod, and the length is 80mm to 100mm.

[0033] The support plate 5 is square or round in shape, stamped into a bowl shape, and made of low-carbon steel. Its specifications and dimensions are determined according to the surrounding rock stress. The diameter of the support plate 5 is 150mm-200mm, and the thickness is 5-10mm. The diameter of the internal circular hole depends on the diameter of the anchor rod. In use, its specifications and dimensions are determined according to the surrounding rock stress. Its diameter is 150mm or the external dimensions are 150mm×150mm, and the thickness is 5-10mm. The diameter of the internal circular hole depends on the diameter of the anchor rod. If the surrounding rock stress is high, its diameter can be changed to 200mm or the external dimensions to 200mm×200mm, and the thickness becomes 10mm. It is made of low-carbon steel and stamped.

[0034] The nut 7 is hexagonal in shape, and its inner diameter is determined by the outer diameter of the anchor bolt thread section. It is 30mm long and made of low-carbon steel. The washer 6 is 0.5~1mm thick, and its inner diameter is determined by the outer diameter of the anchor bolt thread section.

[0035] The anchoring method for the energy-releasing anchor bolt includes the following specific steps: S1. Drill anchor bolt holes within the rock mass; S2. Place anchoring agent in the anchor bolt hole. The anchoring agent is made of resin or cement cartridges, etc. The amount of anchoring agent added is added according to the requirements. The anchor bolt is anchored by reinforcing the surrounding rock in a way that is full-length or half-length. When using resin or cement anchoring, the frictional resistance between the anchor bolt and the anchoring material can be increased, and the static pull-out force of the anchor bolt can reach more than 18t. At the same time, a layer of release agent is applied to the triangular pyramidal section of the energy-releasing anchor. The release agent acts as a lubricant to achieve the functions of pressure relief and energy release. When the surrounding rock undergoes large deformation or rock burst, the triangular pyramidal section can quickly slide out of the resin. It is necessary to apply release agent to the module to achieve the pressure relief function of the anchor.

[0036] S3. Insert the triangular pyramidal section of the release anchor rod coated with release agent into the anchor rod hole and fix it with anchoring agent. Give a time period for the anchoring agent to solidify. S4. After the anchoring agent has solidified, install the support plate, washer and nut in sequence on the threaded connection section of the energy release anchor. By adjusting the position of the support plate and nut, the preload of the anchor can be changed, and it can be locked and fixed.

[0037] The energy-releasing anchor can be anchored at half length or at full length, with an anchoring length between 0.5 and 3 m; the anchor diameter is 16 mm to 40 mm.

[0038] Its anchoring principle is as follows: First, it plays a role in multi-point anchoring under static load. Under high stress, the stress is applied to the triangular pyramid-shaped body module through the anchor plate. The anchoring effect is achieved by the frictional resistance generated between the pyramid and the surrounding rock. When the rock mass undergoes shear expansion deformation, the rod body undergoes plastic deformation under the influence of the anchoring effect at the end of the anchor rod, thereby releasing the high stress inside the surrounding rock.

[0039] The second type of energy-releasing anchor bolt is a novel three-cone-shaped energy-releasing anchor bolt that can produce a certain displacement (10mm~500mm) in the axial direction within the anchor bolt hole under dynamic impacts such as rock bursts and blasting (the specific displacement depends on the dynamic response characteristics of the rock). This rapidly releases the kinetic energy accumulated by the dynamic impact, and mitigates or eliminates ground pressure disasters induced by high stress concentration, dynamic impact, and brittle-ductile large deformation.

[0040] During the installation of the aforementioned energy-releasing anchor bolt, the triangular pyramidal section uniformly disperses resin or cement into the borehole, allowing the bolt to pass through the uniform resin and anchor itself to the surrounding rock. A support plate, washer, and nut are installed at the end of the anchor bolt, further securing it to the surface of the surrounding rock. Under static ground pressure, the energy-releasing anchor bolt operates on the same mechanism as ordinary anchor bolts. When high stress causes large deformation or rockburst causes dynamic failure, the triangular pyramidal section rapidly slides from the resin anchoring agent, releasing the energy accumulated in the surrounding rock. Under high stress, rockburst (rockburst), and brittle-ductile large deformation, it remains within the resin, providing static anchoring. In other words, this invention can maintain consistency with the deformation of the surrounding rock in the tunnel, thereby releasing the strain properties of the surrounding rock and maintaining tunnel stability.

[0041] In summary, by designing triangular pyramid-like segments of different types, sizes, and lengths, it is possible to resist large deformations of the surrounding rock and strong rock bursts in roadways; thereby achieving roadway stability and eliminating safety hazards caused by large deformations and rock bursts in deep wells.

[0042] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0043] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A novel triangular pyramid-shaped energy-releasing anchor bolt, comprising an anchor bolt body, characterized in that: The anchor rod body is a three-section integrated structure. Its front end is a triangular pyramidal section (1) that is anchored at multiple points and releases kinetic energy through stretching or shearing deformation. The middle part is a straight rod section (2) for anchoring. The rear end is a threaded connection section (3). The triangular pyramidal section (1) is heated and then formed in one go using a suitable die casting or extrusion technology. After cooling, it is subjected to grinding, polishing and other finishing processes. The cross section of the triangular pyramid segment (1) is a triangle, and each side of the triangle has an outwardly convex arc surface (4) in the middle. The length of the triangular pyramid segment (1) is a pyramid structure with a larger front and a smaller back from front to back. The threaded connection section (3) is sequentially equipped with a support plate (5), a washer (6) and a nut (7).

2. The novel triangular pyramid-shaped energy-releasing anchor bolt according to claim 1, characterized in that: The total length of the anchor rod is 1200~4000mm. The specific length is adjusted according to the dynamic response characteristics of the rock mass and the magnitude of the ground pressure. The length of the rod may be increased or decreased. The length of the triangular pyramid section is adjusted according to the actual ground pressure on site, as well as the anchoring force and the dynamic response requirements of the rock mass.

3. The novel triangular pyramid-shaped energy-releasing anchor bolt according to claim 1, characterized in that: The anchor rod of the straight rod section (2) of the anchoring section has a diameter of 16mm~32mm round steel.

4. The novel triangular pyramid-shaped energy-releasing anchor bolt according to claim 1, characterized in that: The thread of the threaded connection section (3) is determined according to the diameter of the anchor rod, and the length is 80mm~100mm.

5. The novel triangular pyramid-shaped energy-releasing anchor bolt according to claim 1, characterized in that: The pallet (5) is square or round in shape and is stamped into a bowl shape. It is made of low carbon steel and is stamped. Its specifications and dimensions are determined according to the stress of the surrounding rock.

6. The novel triangular pyramid-shaped energy-releasing anchor bolt according to claim 1, characterized in that: The diameter of the support plate (5) is 150mm-200mm, the thickness is 5-10mm, and the diameter of the inner circular hole depends on the diameter of the anchor rod.

7. The novel triangular pyramid-shaped energy-releasing anchor bolt according to claim 1, characterized in that: The nut (7) is hexagonal in shape, and its inner diameter is determined according to the outer diameter of the anchor bolt thread section. Its length is 30mm and the material is low carbon steel.

8. The novel triangular pyramid-shaped energy-releasing anchor bolt according to claim 1, characterized in that: The gasket (6) Thickness 0.5~1mm, its inner diameter is determined by the outer diameter of the anchor bolt thread section.

9. An anchoring method based on the energy-releasing anchor bolt according to any one of claims 1-7, characterized in that... The key point is that the specific steps are as follows: S1. Drill anchor bolt holes within the rock mass; S2. Place anchoring agent in the anchor bolt hole. The amount of anchoring agent added depends on the requirements. Anchor the bolt by reinforcing the surrounding rock in a way that reinforces the entire length or half length. At the same time, apply a layer of release agent to the triangular pyramidal section of the energy-releasing anchor bolt. S3. Insert the triangular pyramidal section of the energy-releasing anchor rod coated with release agent into the anchor rod hole, and fix it with anchoring agent. The anchoring agent solidifies for 60~120 seconds. S4. After the anchoring agent has solidified, install the support plate, washer and nut in sequence on the threaded connection section of the energy release anchor. By adjusting the position of the support plate and nut, the preload of the anchor can be changed, and the anchor can be locked and fixed.

10. The anchoring method for the energy-releasing anchor bolt according to claim 9, characterized in that: The energy-releasing anchor bolts can be semi-length anchored or full-length anchored, with an anchoring length between 0.5 and 3 meters; the anchor bolt diameter is 16 mm to 40 mm. The anchoring agent is a resin or cement roll, and the release agent is used as a lubricant.

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