Anchor net cable supporting device

Abstract

The invention discloses an anchor net cable supporting device. The anchor net cable supporting device comprises a metal net, a steel belt, a tray and an anchor rod or an anchor cable, the steel belt is arranged on the side, away from surrounding rock, of the metal net and provided with an installation groove, an energy absorption sleeve is arranged on the peripheral side of the installation groove, and the tray is arranged on the side, away from the surrounding rock, of the steel belt and provided with resistance increasing nails. At least part of the resistance-increasing nail is inserted into the energy-absorbing sleeve in a sliding mode, the outer diameter of the resistance-increasing nail is gradually reduced in the direction close to the surrounding rock, the maximum diameter of the resistance-increasing nail is larger than the inner diameter of the energy-absorbing sleeve, the tray is provided with an installation hole corresponding to the installation groove in position, and the anchor rod or the anchor cable sequentially penetrates through the installation hole, the installation groove and meshes of the metal net to be anchored into the deep layer of the surrounding rock. Prestress is applied to the tray by adjusting a nut or a lock at the anchor tail. According to the anchor net cable supporting device, the connecting mode of the tray and the steel belt is optimized, the energy absorption assembly is additionally arranged, and the problems that the anchor tail is prone to being sheared, the steel belt is prone to being bent and sheared to be damaged, and prestress is lost are solved.

Description

Technical Field

[0001] This invention relates to the field of rock support technology for mine roadways, and particularly to an anchor-mesh cable support device. Background Technology

[0002] As the depth of mineral resource mining continues to increase, the geomechanical environment faced by deep roadways becomes increasingly complex. The superposition of high stress and mining-induced stress has become a core factor affecting roadway stability. Under these conditions, the surrounding rock is affected by stress concentration, making it highly susceptible to large deformation and failure phenomena such as crack propagation and rock mass fracturing. This not only threatens the safety of underground operations but also leads to a surge in roadway maintenance costs and a decrease in mining efficiency. Therefore, higher requirements are placed on the bearing capacity and deformation resistance of the surrounding rock support structure.

[0003] Currently, anchor-mesh-cable support structures are the mainstream technical solution for controlling the surrounding rock in deep roadways. They are formed by anchoring anchor bolts or cables to stable rock strata deep within the surrounding rock, connecting them with pre-set slots on steel strips, and then pressing a metal mesh onto the steel strip to form a coordinated support system of "points (anchor bolt or cable anchoring points) - lines (steel strips) - surfaces (metal mesh)". This system can effectively transfer support loads and constrain the deformation of the surrounding rock, playing a key role in practical engineering.

[0004] However, under complex working conditions of high stress and mining impact, anchor-mesh-cable support structures still suffer from the following unavoidable technical defects, leading to frequent support failures: Anchor tail rods are susceptible to shear failure by the steel strip: Due to the continuous deformation and compression of the fractured rock mass on the surrounding rock surface, the steel strip is prone to bending deformation, which in turn causes lateral displacement of the steel strip groove at the control point of the anchor rod or anchor cable tail. When the deformation of the steel strip exceeds the critical value, the edge of the groove will come into close contact with the anchor rod or anchor cable tail and generate shear force; since the steel strip itself is relatively thin and the lateral shear resistance of the anchor rod or anchor cable is relatively weak, the interaction between the two can easily cause the anchor tail to be sheared off, directly leading to the loss of anchoring function and causing local support failure.

[0005] Increasing prestress can easily lead to secondary damage and prestress loss in the steel strip: To enhance the support effect, engineering projects often increase the prestress of the anchor tail tray to improve the overburden force of the steel strip on the surrounding rock. However, this can cause the steel strip on one side of the tray to deform inward due to localized stress concentration. On the one hand, the inward deformation of the steel strip will cause rapid loss of prestress, weakening the effective transfer of support load; on the other hand, the inward deformation will cause the steel strip to bear additional bending and shear stress, further aggravating the bending and shear failure of the steel strip, forming a vicious cycle of "prestress increase - steel strip failure - prestress loss", making it impossible to achieve long-term stable support. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, embodiments of the present invention propose an anchor-net cable support device that is displacement-resistant, shear-resistant, and energy-absorbing.

[0008] The anchor-net cable support device of this invention includes: Metal mesh, used to cover the surface of the surrounding rock; A steel strip is provided on the side of the metal mesh away from the surrounding rock. The steel strip has an installation groove that extends through the steel strip along its thickness direction. An energy-absorbing sleeve is provided around the installation groove. The axial direction of the energy-absorbing sleeve is consistent with the thickness direction of the steel strip. At least a portion of the energy-absorbing sleeve is used to wed into the surface of the surrounding rock. The tray is located on the side of the steel strip away from the surrounding rock. The tray is provided with a drag-increasing nail. At least a portion of the drag-increasing nail is slidably inserted into the energy-absorbing sleeve. The outer diameter of the drag-increasing nail gradually decreases in the direction close to the surrounding rock. The maximum diameter of the drag-increasing nail is greater than the inner diameter of the energy-absorbing sleeve. The tray is provided with mounting holes corresponding to the mounting groove position. An anchor bolt or anchor cable is inserted into the deep rock layer by sequentially passing through the mounting hole, the mounting groove and the mesh of the metal mesh, and prestress is applied to the tray by adjusting the nut or lock at the anchor tail.

[0009] In some embodiments, the yield strength of the energy-absorbing sleeve is 235–345 MPa, and the inner diameter of the energy-absorbing sleeve is 2–3 mm smaller than the maximum diameter of the resistance-increasing pin.

[0010] In some embodiments, the energy-absorbing sleeve penetrates the steel strip so that the resistance-increasing nail is inserted from the end of the energy-absorbing sleeve away from the surrounding rock, and a reinforcing member is provided between the portion of the energy-absorbing sleeve penetrating the steel strip and the steel strip.

[0011] In some embodiments, the end of the energy-absorbing sleeve near the surrounding rock is tapered so that the energy-absorbing sleeve is wedged into the surface of the surrounding rock.

[0012] In some embodiments, there are multiple energy-absorbing sleeves, which are arranged at intervals around the mounting groove.

[0013] In some embodiments, the vertical distance between the central axis of the energy-absorbing sleeve and the central axis of the mounting groove is 50-80 mm, and the length of the energy-absorbing sleeve is 40-200 mm.

[0014] In some embodiments, the drag-increasing nail is integrally formed with the tray, the drag-increasing nail extends vertically from the surface of the tray near the surrounding rock towards the surrounding rock, and there are multiple drag-increasing nails, each corresponding to one of the multiple energy-absorbing sleeves.

[0015] In some embodiments, the free end of the resistance-increasing pin is rounded.

[0016] In some embodiments, the pallet has a circular or square structure, and the tensile strength of the pallet is greater than or equal to 600 MPa.

[0017] In some embodiments, there are multiple mounting slots for the steel strip, and the multiple mounting slots are arranged at intervals along the length direction of the steel strip. There are multiple trays and anchor rods or anchor cables, and each corresponds to one of the multiple mounting slots.

[0018] The anchor-net cable support device of this invention constructs a cooperative constraint structure between the tray and the steel strip by setting an energy-absorbing sleeve that can wedge into the surrounding rock near the installation groove of the steel strip and setting a resistance-increasing nail at the corresponding position of the tray, thereby avoiding direct interaction between the groove edge of the steel strip and the anchor tail and fundamentally preventing the anchor tail from being sheared by the steel strip.

[0019] By utilizing the plastic deformation characteristics of the energy-absorbing casing, when the axial load on the anchor bolt or anchor cable increases, the energy-absorbing casing is squeezed into the depth of the casing by the movement of the tray-type resistance-increasing nail, thereby achieving effective absorption of the deformation energy of the surrounding rock.

[0020] To ensure that during the application of prestress and the pressing of the tray into the rock mass, stable contact between the tray and the surrounding rock is maintained, avoiding prestress loss due to steel strip indentation, and the support load is transferred through the coordinated movement of the tray and steel strip, ensuring the stable performance of the "point-line-surface" control function of the anchor-mesh cable support structure, and improving the reliability and durability of the surrounding rock support in deep roadways. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the anchor net cable support device according to an embodiment of the present invention.

[0022] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0023] Figure 3 This is a first partial schematic diagram of the steel strip of the anchor mesh cable support device according to an embodiment of the present invention.

[0024] Figure 4 This is a second partial schematic diagram of the steel strip of the anchor mesh cable support device according to an embodiment of the present invention.

[0025] Figure 5 This is a first schematic diagram of the tray of the anchor net cable support device according to an embodiment of the present invention.

[0026] Figure 6 This is a second schematic diagram of the tray of the anchor net cable support device according to an embodiment of the present invention.

[0027] Figure label: 1-Steel strip; 101-Mounting groove; 102-Energy-absorbing sleeve; 2-Tray; 201-Resistance-increasing pin; 202-Mounting hole; 3-Anchor cable; 301-Locking device. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] The anchor-mesh cable support device of this invention aims to address the technical pain points in deep roadway anchor-mesh cable support systems, such as steel strip bending deformation caused by the superposition of high stress in the surrounding rock and mining stress, shearing of the anchor tail at the groove edge, and the tendency of increasing the prestress of the tray to cause steel strip indentation, prestress loss, and steel strip bending and shearing failure. It provides a tray and steel strip combined structure to prevent the steel strip from shearing the anchor tail.

[0030] The anchor wire mesh support device of the present invention is described below with reference to the accompanying drawings.

[0031] like Figures 1 to 6 As shown, the anchor mesh cable support device of this embodiment includes a metal mesh, a steel strip 1, a tray 2, and an anchor rod or anchor cable 3.

[0032] The metal mesh, not shown in the figure, is located in the innermost layer closest to the surrounding rock. It is used to cover the surface of the surrounding rock as a "surface" control carrier in the support system, preventing small rocks from falling and forming the first protective layer.

[0033] Steel strip 1 is placed on the side of the metal mesh away from the surrounding rock (middle layer). Steel strip 1 is parallel to and in contact with the metal mesh, and provides pressure to keep the metal mesh tightly against the surrounding rock. Steel strip 1 is made of high-strength steel with a thickness of 3-5mm. Its width is adapted to the roadway support requirements, and it has sufficient tensile strength and bending stiffness to effectively resist the lateral tensile force generated by the deformation of the surrounding rock.

[0034] The steel strip 1 is provided with an installation groove 101, which extends through the steel strip 1 along its thickness direction. It should be noted that the size of the installation groove 101 is 2-3 mm larger than the diameter of the anchor rod or anchor cable 3 to ensure that the anchor rod or anchor cable 3 can be smoothly inserted, while avoiding excessive compression between the anchor rod or anchor cable 3 and the edge of the installation groove 101.

[0035] To address the displacement and energy absorption issues of the steel strip 1, an energy-absorbing sleeve 102 is provided around the periphery of the mounting groove 101. The axial direction of the energy-absorbing sleeve 102 is consistent with the thickness direction of the steel strip 1, that is, the energy-absorbing sleeve 102 is perpendicular to the steel strip 1. The energy-absorbing sleeve 102 has good plastic deformation capacity, and at least a portion of the energy-absorbing sleeve 102 is used to wed into the surface of the surrounding rock.

[0036] The steel strip 1 serves as the "line" control carrier, transmitting the anchoring force of the anchor bolt or anchor cable 3 to the entire support surface, and is connected to the surrounding rock through the energy-absorbing sleeve 102 to enhance overall stability.

[0037] The tray 2 is located on the side of the steel strip 1 furthest from the surrounding rock (outermost layer). The tray 2 is provided with a drag-increasing pin 201, at least a portion of which is slidably inserted into the energy-absorbing sleeve 102. The outer diameter of the drag-increasing pin 201 gradually decreases towards the surrounding rock, and the maximum diameter of the drag-increasing pin 201 is greater than the inner diameter of the energy-absorbing sleeve 102. The tray 2 is provided with mounting holes 202 corresponding to the positions of the mounting groove 101.

[0038] The tray 2, as the core of the "point" control, evenly transmits the anchoring force of the anchor bolt or anchor cable 3 to the steel strip 1 and the surrounding rock, and achieves coordinated constraint with the energy-absorbing sleeve 102 through the resistance-increasing nail 201.

[0039] Anchor bolts or cables 3 are sequentially inserted through the mounting hole 202, mounting groove 101, and the mesh of the metal mesh, anchoring into the deep layers of the surrounding rock. If anchor bolts are used, a nut is fitted at the tail end of the bolt. Tightening the nut applies prestress to the tray 2, causing the tray 2 to tightly press against the surface of the surrounding rock. Simultaneously, this drives the resistance-increasing nail 201 to insert into the energy-absorbing sleeve 102, pushing the energy-absorbing sleeve 102 wedged into the surface of the surrounding rock. Similarly, if anchor cables 3 are used, a tensioning device or locking device is fitted at the tail end of the cable. Adjusting the tensioning device or locking device applies prestress to the tray 2.

[0040] By forming a "pin-tube" connection between the resistance-increasing pin 201 on the tray 2 and the energy-absorbing sleeve 102 of the steel strip 1, the lateral displacement of the steel strip 1 relative to the tray 2 is restricted, and the installation groove 101 of the steel strip 1 is prevented from moving due to the deformation of the surrounding rock. This prevents the edge of the installation groove 101 from contacting the anchor tail of the anchor rod or anchor cable 3 and generating a shearing effect, thus fundamentally eliminating the problem of the anchor tail being sheared off.

[0041] When the surrounding rock is subjected to high stress or mining-induced continuous deformation, the axial load on the anchor bolt or anchor cable 3 will increase accordingly. At this time, under the load, the tray 2 will drive the resistance-increasing nail 201 to move deeper into the energy-absorbing sleeve 102. The compression of the resistance-increasing nail 201 will cause the energy-absorbing sleeve 102 to undergo plastic deformation. In this process, it absorbs the energy generated by the deformation of the surrounding rock, relieves the bending and shear stress on the steel strip 1, and avoids bending and shear failure of the steel strip 1 due to stress concentration.

[0042] After the energy-absorbing sleeve 102 is wedged into the surrounding rock, it can enhance the connection stability between the steel strip 1 and the surrounding rock, prevent the steel strip 1 from sinking when the tray 2 applies prestress, and ensure that the support load can be effectively transferred to the surrounding rock.

[0043] In some embodiments, the yield strength of the energy-absorbing sleeve 102 is 235-345 MPa, for example, made of low-carbon steel, to ensure that the energy-absorbing sleeve 102 can undergo controllable plastic deformation when the surrounding rock deforms, thereby absorbing energy.

[0044] Low-carbon steel with a yield strength of 235–345 MPa falls within a medium strength range, neither too strong to prevent deformation nor too weak to cause premature failure. Within this strength range, the material can withstand a certain load while also undergoing plastic deformation under the extrusion of the resistance-enhancing stud 201, thus achieving energy absorption.

[0045] Therefore, the energy-absorbing sleeve 102 will only be triggered to deform when the surrounding rock undergoes large deformation or the axial load of the anchor bolt or anchor cable 3 increases significantly, thus achieving energy absorption on demand.

[0046] The inner diameter of the energy-absorbing sleeve 102 is 2-3 mm smaller than the maximum diameter of the resistance-increasing pin 201, creating an interference fit between the two. This ensures that the resistance-increasing pin 201 can be smoothly inserted into the energy-absorbing sleeve 102. This fit guarantees connection stability without causing installation difficulties due to excessive interference.

[0047] The appropriate interference fit allows the resistance-increasing pin 201 to generate radial pressure on the energy-absorbing sleeve 102 after insertion. When the surrounding rock deformation causes an increase in the load on the anchor bolt or anchor cable 3, the resistance-increasing pin 201 can move further into the sleeve. This design enables the resistance-increasing pin 201 to effectively transfer the surrounding rock deformation to the energy-absorbing sleeve 102, triggering the plastic deformation of the sleeve and achieving energy absorption.

[0048] In some embodiments, such as Figures 2 to 4 As shown, the energy-absorbing sleeve 102 passes through the steel strip 1 so that the resistance spike 201 is inserted from the end of the energy-absorbing sleeve 102 away from the surrounding rock.

[0049] If the end of the energy-absorbing sleeve 102 furthest from the surrounding rock is flush with the surface of the steel strip 1, the connection between the energy-absorbing sleeve 102 and the steel strip 1 is prone to breakage under lateral force. Therefore, the through-hole design of the energy-absorbing sleeve 102 improves the stable connection between the energy-absorbing sleeve 102 and the steel strip 1, making it less prone to failure during long-term use.

[0050] Furthermore, a reinforcing member (not shown in the figure) is provided between the portion of the energy-absorbing sleeve 102 that penetrates the steel strip 1 and the steel strip 1. For example, the reinforcing member can be a reinforcing rib. By providing a ring of reinforcing ribs around the surface of the steel strip 1 on both sides in the thickness direction and the outer wall of the energy-absorbing sleeve 102, the stability of the connection between the two is improved and stress concentration is reduced.

[0051] Furthermore, such as Figures 2 to 4 As shown, the end of the energy-absorbing sleeve 102 near the surrounding rock is tapered, and it can be mechanically sharpened to form a tapered structure so that the energy-absorbing sleeve 102 can be wedged into the surface of the surrounding rock.

[0052] Understandably, because the flat end has a large contact area and disperses pressure, it is difficult to penetrate hard or dense rock layers, while the conical tip has a small area and can generate extremely high local pressure, effectively penetrating the surface of the surrounding rock.

[0053] In some embodiments, such as Figures 1 to 4 As shown, there are multiple energy-absorbing sleeves 102 around each mounting groove 101, and the multiple energy-absorbing sleeves 102 are arranged at intervals around the mounting groove 101.

[0054] Understandably, single-point stress can easily lead to localized stress concentration, potentially causing localized deformation or damage to the steel strip 1. Therefore, by arranging multiple energy-absorbing sleeves 102 around the mounting groove 101, the load transmitted by the resistance-increasing pin 201 can be evenly distributed to all parts of the steel strip 1, preventing excessive deformation of the steel strip 1 at the point of action of the resistance-increasing pin 201 and extending its service life.

[0055] Multiple energy-absorbing sleeves 102 arranged around each other can form a "cross" or "radial" constraint, restricting the omnidirectional movement of the steel strip 1 in the horizontal plane, fundamentally preventing the edge of the groove of the steel strip 1 from contacting the anchor tail and avoiding shear damage.

[0056] Multiple energy-absorbing casings 102 can participate in energy absorption simultaneously, forming a larger plastic deformation zone, increasing the energy absorption capacity of the entire support system, and adapting to greater surrounding rock deformation. In addition, even if some casings fail, the other casings can still maintain basic restraint functions, improving the reliability of the support.

[0057] Optionally, the vertical distance between the central axis of the energy-absorbing sleeve 102 and the central axis of the mounting groove 101 is 50-80mm to ensure that there is a sufficient safe distance between the energy-absorbing sleeve 102 and the anchor rod or anchor cable 3.

[0058] The energy-absorbing sleeve 102 has a length of 40–200 mm, ensuring that it can effectively wed into the surrounding rock surface. Sufficient length allows the sleeve to penetrate the fractured zone on the rock surface, anchoring to stable rock strata and establishing a stable "anchor point," providing reliable support for the steel strip 1 and preventing prestress loss. Furthermore, the appropriate length ensures that the energy-absorbing sleeve 102 has sufficient space for plastic deformation.

[0059] The appropriate length of the energy-absorbing sleeve is selected according to the actual working conditions. For example, when using anchor bolts, the length of the energy-absorbing sleeve 102 can be in the range of 40 to 60 mm; when using anchor cables 3, the length of the energy-absorbing sleeve 102 can be in the range of 100 to 200 mm.

[0060] In some embodiments, such as Figure 5 and Figure 6As shown, the resistance-enhancing nail 201 is integrally formed with the tray 2, and the resistance-enhancing nail 201 extends vertically from the surface of the tray 2 near the surrounding rock towards the surrounding rock.

[0061] The one-piece molding ensures that there is no connection interface between the resistance-increasing nail 201 and the tray 2, forming a continuous force transmission path. This eliminates the risk of failure due to weak connections, improves structural reliability, avoids problems such as loosening and breakage that may occur in traditional connection methods, maintains structural stability under high prestress conditions, and prevents support failure due to connection point failure.

[0062] Furthermore, the pallet 2 with the resistance-increasing studs 201 can be directly manufactured through casting or one-piece molding processes, reducing assembly steps, lowering manufacturing costs, improving production efficiency, making it suitable for large-scale production, ensuring the relative positional accuracy between components, and improving assembly quality.

[0063] Multiple resistance spikes 201 are provided, each corresponding to a different energy-absorbing sleeve 102, forming a multi-point constraint to suppress the torsional tendency of the steel strip 1 under the pre-tightening force of the anchor rod or anchor cable 3.

[0064] Furthermore, such as Figure 5 As shown, the rounded corners of the free end of the resistance-increasing pin 201 can eliminate sharp edges and avoid mechanical damage to the inner wall of the energy-absorbing sleeve 102 during insertion.

[0065] In some embodiments, the pallet 2 adopts a circular or square structure. The circular structure has the same stiffness in all directions, enabling it to uniformly transfer the prestress of the anchor bolt or anchor cable 3 to the steel strip 1 and the surrounding rock. The four-sided structure facilitates stable four-point contact with the steel strip 1, improving connection stability, while the angular design helps to form a clear contact boundary with the steel strip 1, preventing lateral slippage. Both designs are simple to manufacture, have low cost, and are suitable for mass production.

[0066] The tensile strength of pallet 2 is greater than or equal to 600 MPa, ensuring that pallet 2 will not undergo plastic deformation under high prestress. This prevents pallet 2 from yielding under high prestress, maintains geometric stability, avoids indentation of steel strip 1 and loss of prestress due to deformation of pallet 2, and ensures that the relative positional relationship between the resistance-increasing stud 201 and the energy-absorbing sleeve 102 remains unchanged.

[0067] In some embodiments, such as Figure 1 As shown, there are multiple mounting grooves 101 for the steel strip 1, and the multiple mounting grooves 101 are arranged at intervals along the length direction of the steel strip 1. There are multiple trays 2 and anchor rods or anchor cables 3, and they correspond one-to-one with the multiple mounting grooves 101.

[0068] The corresponding design of the mounting groove 101, tray 2, and multiple anchor rods or anchor cables 3 distributes the support load across the entire support surface, avoiding local damage caused by excessive stress at a single point, improving the overall structural stability, forming a continuous support network, enhancing the overall constraint effect on the surrounding rock, reducing stress concentration, and extending the service life of the device.

[0069] In summary, the anchor-mesh cable support device of this invention addresses the core challenges of anchor-mesh cable support under high stress and mining conditions in deep roadways. Through a design of "cooperative limiting + plastic energy absorption," it achieves breakthroughs in multiple dimensions, including support safety, structural stability, and load transfer efficiency, as detailed below: By connecting the resistance-increasing pins 201 of the tray 2 with the energy-absorbing sleeves 102 of the steel strip 1, the lateral movement of the steel strip 1 is restricted, the edge of the groove of the steel strip 1 is prevented from interacting with the anchor tail, and the anchor tail is prevented from being cut off from the source, thus improving the support safety.

[0070] When the axial load of the anchor bolt or anchor cable 3 increases, the resistance-increasing nail 201 of the tray 2 squeezes the energy-absorbing sleeve 102 to cause it to plastically deform, absorb the energy generated by the deformation of the surrounding rock, relieve the bending and shear stress of the steel strip 1, reduce the indentation and damage of the steel strip 1, and extend its service life.

[0071] The energy-absorbing sleeve 102 is wedged into the surrounding rock to provide support for the steel strip 1, avoid prestress loss, ensure stable transmission of support load, and give full play to the "point-line-surface" control function of the anchor mesh cable.

[0072] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0076] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] 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. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An anchor net cable support device, characterized by, The utility model relates to a kind of energy-absorbing anchor for rock mass, including: Metal net, which is used to cover the surface of surrounding rock; Steel belt, which is arranged on the side of the metal net away from the surrounding rock, is provided with mounting slot, which penetrates the steel belt along the thickness direction of the steel belt, and the peripheral side of the mounting slot is provided with energy-absorbing sleeve, the axial direction of the energy-absorbing sleeve is consistent with the thickness direction of the steel belt, and at least part of the energy-absorbing sleeve is used to wedge into the surface layer of surrounding rock; Tray, which is arranged on the side of the steel belt away from the surrounding rock, is provided with resistance-increasing nails, at least part of the resistance-increasing nails is slidably inserted into the energy-absorbing sleeve, the outer diameter of the resistance-increasing nails gradually decreases in the direction close to the surrounding rock, the maximum diameter of the resistance-increasing nails is greater than the inner diameter of the energy-absorbing sleeve, and the tray is provided with mounting holes corresponding to the positions of the mounting slots; Anchor rod or anchor cable, which penetrates the mounting holes, the mounting slots and the mesh holes of the metal net in sequence and is anchored into the deep layer of surrounding rock, and the nut or lock of the anchor tail is adjusted to apply pre-stress to the tray.

2. The cable bolting device according to claim 1, wherein, The yield strength of the energy-absorbing sleeve is 235-345 MPa, and the inner diameter of the energy-absorbing sleeve is 2-3 mm smaller than the maximum diameter of the resistance-increasing nails.

3. The cable bolting device according to claim 1, wherein, The energy-absorbing sleeve penetrates the steel belt, so that the resistance-increasing nails are inserted from the end of the energy-absorbing sleeve away from the surrounding rock, and a reinforcing component is arranged between the part of the energy-absorbing sleeve penetrating the steel belt and the steel belt.

4. The cable bolting device according to claim 3, wherein, The end of the energy-absorbing sleeve close to the surrounding rock is tapered, so that the energy-absorbing sleeve is wedged into the surface layer of surrounding rock.

5. The cable bolting apparatus according to claim 1, wherein, The energy-absorbing sleeves are multiple, and are arranged around the mounting slots at intervals.

6. The cable bolting apparatus according to claim 5, wherein, The perpendicular distance between the central axis of the energy-absorbing sleeve and the central axis of the mounting slot is 50-80 mm, and the length of the energy-absorbing sleeve is 40-200 mm.

7. The cable bolting apparatus according to claim 5, wherein, The resistance-increasing nails are integrally formed with the tray, the resistance-increasing nails vertically extend from the surface of the tray close to the surrounding rock to the surrounding rock, the resistance-increasing nails are multiple and one-to-one correspond to the energy-absorbing sleeves.

8. The cable bolting device according to claim 7, wherein, The free end of the resistance-increasing nail is chamfered.

9. The cable bolting apparatus according to claim 1, wherein, The tray adopts circular or square structure, and the tensile strength of the tray is greater than or equal to 600 MPa.

10. The cable bolting apparatus according to any one of claims 1 to 9, wherein, The mounting slots of the steel belt are multiple, and are arranged at intervals along the length direction of the steel belt, and the tray and the anchor rod or anchor cable are also multiple and one-to-one correspond to the mounting slots.

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