Self-anchoring double-pass anchor cable device for single-side operation of coal pillar along empty roadway

Abstract

The utility model discloses a kind of self-anchoring opposite-passing anchor cable devices of single-side operation along gob roadway coal pillar, it is related to the technical field of coal pillar anchoring field, can effectively solve the problem that upper section goaf is closed in coal pillar, only construction in lower section side, cannot realize opposite-passing anchor cable fixed support, improve along gob roadway safety and stability;The anchor cable device includes anchor cable body, anchor cable body two ends are connected with sleeve joint device, anchor cable fastening device respectively;Sleeve joint device two ends are connected with anchor cable body, connecting self-anchoring device respectively;Self-anchoring device includes self-locker, self-locker includes self-locker main rod, self-locker main rod one end is connected with push plate, the other end passes through the hollow hinged base with hinge steel plate group, and self-lock mechanism is provided on self-locker;Push plate one end connects self-locker main rod, one end connects anchor cable body;Steel plate in steel plate group opposite side encircles self-locker main rod;Steel plate group and push plate, hinged base form containing cavity, and contain anchoring agent in containing cavity.

Description

Technical Field

[0001] This utility model relates to the field of coal pillar anchoring, and in particular to a single-sided self-anchoring through-anchor cable device for coal pillars in goaf tunneling and its anchoring method. Background Technology

[0002] Employing goaf excavation technology can improve coal recovery rates and extend mine service life. However, the commonly used support method in existing goaf excavation is double-sided through-cable anchors, but this technology requires simultaneous construction on both sides of the goaf. Considering that double-road construction is generally not feasible in goaf excavation, which usually involves constructing the upper section first and then the lower section, through-cable anchors cannot be achieved. During existing goaf excavation construction, the anchor bolts and cables in the upper section cause some damage to the coal pillar, leading to anchor detachment during construction in the lower section, which is detrimental to the stability of the coal pillar in the goaf. To ensure the stability of the coal pillar in goaf excavation, reduce roof falls, floor heaves, and sidewall collapses caused by coal pillar instability, and solve the problem of being able to perform through-cable anchor support when excavating the lower section after the upper section has been mined, as the upper section of the goaf is closed and construction can only be carried out on one side of the lower section. Utility Model Content

[0003] This utility model provides a single-sided operation self-anchoring through-anchor cable device and its anchoring method for goaf-side roadway construction. It effectively solves the problem that when the upper section of the goaf is closed and construction is only carried out on one side of the lower section, it is impossible to achieve through-anchor cable fixed support, and improves the safety and stability of the goaf-side roadway.

[0004] In a first aspect, this utility model provides a single-sided operation self-anchoring through-anchor cable device for coal pillars in roadway excavation, comprising: an anchor cable body; a sleeve device, the first end of which is fixed to the first end of the anchor cable body; a self-anchoring device, the self-anchoring device being fixed to the second end of the sleeve device; and an anchor cable fastening device, the anchor cable fastening device being fixed to the second end of the anchor cable body. The self-anchoring device includes: a self-locking device, the first end of which is fixed to the second end of the sleeve device; a hollow hinged base, the second end of which passes through the hollow hinged base; and a steel plate assembly, which is hinged to the side of the hollow hinged base facing the anchor cable body, with the opposite side of the steel plate assembly surrounding the self-locking device. The self-locking device includes: a push plate, the first end of which is fixed to the second end of the sleeve device; and a self-locking main rod, the first end of which is fixed to the second end of the push plate, the second end of which passes through a hollow hinged base, and a self-locking mechanism is provided on the self-locking main rod. According to one possible embodiment of the present utility model, the self-locking mechanism includes: a wedge block group fixed on the main rod of the self-locking device, wherein each wedge block in the wedge block group is symmetrically arranged around the main rod of the self-locking device; the wedge-shaped inclined surface of each wedge block in the wedge block group faces the hollow hinged base.

[0005] According to one possible implementation of this utility model, multiple sets of wedge blocks are fixed on the main rod of the self-locking device, with a preset distance between the multiple sets of wedge blocks, and the multiple sets of wedge blocks constitute a multi-level self-locking mechanism.

[0006] According to one possible embodiment of the present utility model, the hollow hinged base is a cylinder with a central hole at the center, and the end of the self-locking device main rod passes through the central hole.

[0007] According to one possible embodiment of the present utility model, the anchor cable fastening device includes a lock and a tray; the lock and the tray are fixed to the second end of the anchor cable body, the lock and the tray are connected, and the lock is closer to the second end of the anchor cable body than the tray.

[0008] According to one possible embodiment of the present utility model, the sleeve device is a detachable structure, and the sleeve device can be disassembled from the anchor cable body and the self-anchoring device.

[0009] According to one possible embodiment of the present utility model, the push plate is circular, and the diameter of the circular surface of the push plate is larger than the outer diameter of the hollow hinged base.

[0010] According to one possible implementation of this utility model, the main rod of the self-locking device is a hollow structure or a solid structure.

[0011] According to one possible embodiment of the present invention, the steel plate assembly is symmetrically distributed on the hollow hinged base.

[0012] According to one possible embodiment of this utility model, the anchor cable device is made of metal. This utility model provides a single-sided self-anchoring through-anchor cable device and its anchoring method for a coal pillar in a goaf-running roadway. The device includes an anchor cable body, a connecting device, a self-anchoring device, and an anchor cable fastening device. The anchor cable fastening device is fixed to the second end of the anchor cable body, the first end of the connecting device is fixed to the first end of the anchor cable body, and the self-anchoring device is fixed to the second end of the connecting device. The self-anchoring device includes a self-locking device and a hollow hinged base. The first end of the self-locking device is fixed to the second end of the connecting device, and the second end of the self-locking device passes through the hollow hinged base. A steel plate assembly is hinged to the side of the hollow hinged base facing the anchor cable body, and the steel plate assembly surrounds the self-locking device on the opposite side. The steel plate assembly surrounding the self-locking device unfolds during anchoring, ensuring uniform stress on the coal pillar wall and improving anchoring stability.

[0013] The self-locking device includes a push plate and a self-locking main rod. The first end of the push plate is fixed to the second end of the sleeve device, and the first end of the self-locking main rod is fixed to the second end of the push plate. The second end of the self-locking main rod passes through the hollow hinged base, and a self-locking mechanism is provided on the self-locking main rod. The steel plate assembly and the hollow hinged base form an umbrella-shaped structure with a receiving cavity inside. In practical applications, a bag containing anchoring agent is placed into the receiving cavity. When the anchor cable body is pushed upward through the pre-set anchor cable hole in the lower section, the receiving cavity can protect the anchoring agent and prevent it from breaking during the advancement in the anchor cable hole. When the anchor cable device is pulled back to the bottom from the upper section to the lower section, the self-locking mechanism on the self-locking device can ensure the structural stability of the anchor cable device and can also better ensure the stability of the coal pillar during single-sided section construction. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a self-anchoring through-anchor cable device for single-sided operation of a coal pillar in a goaf tunnel according to an embodiment of the present invention, in the closed state. Figure 2 This is a schematic diagram of the structure of a self-anchoring through-anchor cable device for single-sided operation of a coal pillar in a goaf tunnel according to an embodiment of the present invention, in the open state. Figure 3 This is a schematic diagram of the structure of the self-locking device and the hollow hinged base of the anchor used for coal pillar anchoring according to an embodiment of the present invention. Figure 4 This is a schematic diagram illustrating the application of a self-anchoring through-anchor cable device for single-sided operation of coal pillars in a goaf tunnel according to an embodiment of the present invention. In the diagram, 1 is the anchor cable body, 2 is the anchor cable fastening device, 3 is the self-anchoring device, 4 is the hollow hinged base, 5 is the steel plate assembly, 6 is the receiving cavity, 7 is the self-locking device, 8 is the push plate, 9 is the main rod of the self-locking device, 10 is the wedge block assembly, 11 is the lock, 12 is the tray, 13 is the center hole, and 14 is the connecting device. Detailed Implementation

[0016] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0017] It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] Firstly, this utility model provides a single-sided operation self-anchoring through-anchor cable device for coal pillars in goaf-side excavation, which can effectively solve the problem of closed goaf areas in the upper section of the coal pillar, where construction is only carried out on one side of the lower section, making it impossible to achieve through-anchor cable fixed support, and improve the safety and stability of goaf-side roadways.

[0019] See Figure 1 and Figure 2 As shown; this utility model embodiment provides a single-sided operation self-anchoring through-anchor cable device for coal pillars in goaf excavation, including: an anchor cable body 1; a self-anchoring device 3, which is fixed to the first end of the anchor cable body 1; and an anchor cable fastening device 2, which is fixed to the second end of the anchor cable body 1.

[0020] The self-anchoring device 3 includes: a self-locking device 7, the first end of which is fixed to the second end of the anchor cable body 1; a hollow hinged base 4, the second end of which passes through the hollow hinged base 4; and a steel plate assembly 5, which is hinged to the side of the hollow hinged base 4 facing the anchor cable body 1, with the opposite side of the steel plate assembly 5 surrounding the self-locking device 7.

[0021] The self-locking device 7 includes: a push plate 8, the first end of which is fixed to the second end of the sleeve device 14; and a self-locking device main rod 9, the first end of which is fixed to the second end of the push plate 8. The second end of the self-locking device main rod 9 passes through the hollow hinged base 4, and a self-locking mechanism is provided on the self-locking device main rod 9.

[0022] The steel plate assembly 5 and the hollow hinged base 4 form an umbrella-shaped structure, and the umbrella-shaped structure has a receiving cavity 6 inside.

[0023] This anchor can be used for anchoring cables in coal pillar tunneling roadways.

[0024] This utility model provides a self-anchoring through-cable device and anchoring method for a single-sided operation of a coal pillar in a goaf excavation roadway. It includes an anchor cable body 1, a self-anchoring device 3, an anchor cable fastening device 2, and a connecting device 14. The self-anchoring device 3 is fixed to the second end of the connecting device 14, the first end of the connecting device 14 is fixed to the first end of the anchor cable body 1, and the anchor cable fastening device 2 is fixed to the second end of the anchor cable body 1. The self-anchoring device 3 includes a self-locking device 7 and a hollow hinged base 4. The first end of the self-locking device 7 is fixed to the second end of the connecting device 14, and the second end of the self-locking device 7 passes through... A hollow hinged base 4 is connected to a steel plate assembly 5 on one side of the hollow hinged base 4 facing the anchor cable body 1. The steel plate assembly 5 surrounds the self-locking device 7 on the opposite side. The self-locking device 7 includes a push plate 8 and a self-locking device main rod 9. The first end of the push plate 8 is fixed to the second end of the sleeve device 14. The first end of the self-locking device main rod 9 is fixed to the second end of the push plate 8. The second end of the self-locking device main rod 9 passes through the hollow hinged base 4. A self-locking mechanism composed of multiple sets of wedge block assemblies 10 is provided on the self-locking device main rod 9. The steel plate assembly 5 and the hollow hinged base 4 form a receiving cavity 6.

[0025] Anchor cable holes are drilled in the coal pillar from the lower section to the upper section. A bag containing anchoring agent is placed into the receiving cavity 6, and the anchor cable device is placed into the pre-drilled anchor cable hole. A thrust is applied to the anchor cable body 1, causing the anchor cable device to advance towards the upper section of the coal pillar. As the anchor cable body 1 advances within the anchor cable hole, the wedge block assembly 10 on the self-locking device main rod 9 contacts the hollow hinged base, pushing the hollow hinged base 4 forward within the anchor cable hole. During this pushing process, the steel plate assembly 5 surrounding the self-locking device 7 prevents the anchoring agent packaging bag from rupturing and causing anchoring agent leakage.

[0026] When the hollow hinged base 4, steel plate group 5 and push plate 8 pass through the anchor cable hole to reach the upper section, the hollow hinged base 4 encounters an obstacle in the upper section and is blocked. It continues to apply a thrust to the anchor cable body 1 to push the anchor cable device to the bottom. The wedge blocks in the wedge block group 10 apply force to the inner wall of the central hole of the hollow hinged base 4, causing the central hole 13 of the hollow hinged base 4 to undergo elastic deformation. The wedge blocks in the multiple wedge block groups 10 pass through the central hole 13 of the hollow hinged base in sequence. The push plate 8 is driven by the self-locking main rod 9 to enter the umbrella-shaped structure's receiving cavity 6, pushing the steel plate group 5 to open. During the advancement process, it squeezes the anchoring agent bag, causing the anchoring agent bag to rupture and the anchoring agent to be released.

[0027] A tension force is applied to the anchor cable body 1 in the lower section of the coal pillar, pulling the anchor cable body 1 back to the bottom. At this time, the wedge block group 10 contacts the hollow hinge base 4, causing the hollow hinge base 4 to retract together with the self-locking device main rod 9. The steel plate group 5 contacts the upper section of the coal pillar wall and is resisted by the coal pillar wall. The steel plate group 5 continues to open and fits against the hollow hinge base 4. The wedge block group 10 near the push plate 8 contacts the hollow hinge base. The hollow hinge base 4 prevents the self-locking device main rod 9 from retracting, forming a self-lock. At this time, the anchor cable fastening device 2 is set to apply a pre-tightening force to the anchor cable device. The lock 11 is adjusted so that the tray 12 is tightly fitted to the coal pillar wall to complete the anchoring.

[0028] In some embodiments, after the hollow hinged base 4, the steel plate group 5, and the push plate 8 pass through the anchor cable hole to reach the upper section, the hollow hinged base 4 encounters an obstacle in the upper section and is blocked. It continues to push the anchor cable body 1 forward to the bottom. The wedge blocks in the wedge block group 10 exert force on the inner wall of the central hole 13 of the hollow hinged base 4, causing the central hole 13 of the hollow hinged base 4 to undergo elastic deformation. When the central hole 13 of the hollow hinged base 4 undergoes elastic deformation, the wedge blocks in the multiple wedge block groups 10 pass through the central hole 13 of the hollow hinged base 4 in sequence. At this time, the central hole 13 of the hollow hinged base 4 also undergoes slight plastic deformation. When the lower section is pulled back to the bottom, the steel plate group 5 is in close contact with the coal pillar wall, and the hollow hinged base 4 is in close contact with the steel plate group 5. At this time, the wedge block group 10 near the push plate 8 is in close contact with the hollow hinged base 4, preventing the self-locking device main rod 9 from retracting.

[0029] Optionally, in some embodiments, a through groove is provided on the inner wall of the central hole 13 of the hollow hinged base 4. The direction of the groove is consistent with the direction of the central hole 13. In actual operation, when each wedge in the multiple sets of wedge blocks 10 passes through the central hole 13 in sequence, when the wedge block passes through the central hole, there is an initial gap between the wedge surface of the wedge block and the corresponding position of the groove. The wedge block is in slight contact with the inner wall of the central hole. At this time, the pushing friction is small, and the wedge block and the groove are in clearance fit. During the pushing process, the wedge block continues to enter the central hole 13, and the wedge surface of the wedge block corresponds to the groove. As the gap between the positions decreases until it disappears, the contact increases and the friction increases. At this point, the wedge block and the groove are in a transitional fit. The wedge block continues to advance, and the wedge surface contacts the groove. The wedge block opens the central hole 13 and forms an interference fit with the groove. At this point, the hollow hinged base 4 undergoes elastic and plastic deformation. Due to the groove, the hollow hinged base 4 can more easily and smoothly undergo uniform elastic deformation when subjected to radial compression from the wedge block, and the plastic deformation is concentrated at the tip of the groove, making the plastic deformation more controllable.

[0030] Furthermore, grooves in different directions are evenly provided on the side of each steel plate in the steel plate group 5 facing the self-locking device 7. When the anchor cable body 1 is pulled back to the bottom in the downward section, the steel plate group 5 unfolds and contacts the coal pillar wall. At this time, the side of each steel plate in the steel plate group 5 containing the groove contacts the coal pillar wall. The groove structure increases the contact area with the coal pillar wall and improves the anchoring stability.

[0031] In some embodiments, the self-locking mechanism includes: a wedge block group 10 fixed on the main rod 9 of the self-locking device, wherein each wedge block in the wedge block group 10 is symmetrically arranged around the main rod 9 of the self-locking device; the wedge-shaped inclined surface of each wedge block in the wedge block group 10 faces the hollow hinged base 4.

[0032] In this embodiment, the wedge surface of each wedge in the wedge block group 10 is a cylindrical surface, and the curvature of the wedge is in contact with the central hole of the hollow hinge base 4. When the anchor body 1 pushes the self-anchoring device 3 into the pre-drilled anchor cable hole, the wedge block group 10 on the forward-moving self-locking main rod 9 contacts the hollow hinge base 4, pushing the hollow hinge base 4 forward along the preset anchor cable hole direction, which improves the stability of the structure when the anchor moves forward in the anchor cable hole. When the hollow hinge base 4 encounters an obstacle in the upper section and continues to push the anchor cable body 1 forward in the upper section, the wedge block group 10 passes through the central hole 13 in sequence. At this time, the curvature of the arc surface is in contact with the curvature of the central hole 13, forming a surface contact, reducing the stress at the contact and improving the durability of the anchor cable device.

[0033] Furthermore, in some embodiments, the wedge surface of each wedge in the wedge block group 10 is a non-linear arc surface. The first part of the non-linear arc surface away from the push plate 8 has a large radius of curvature, a small pressure angle, and a large stroke. When the hollow hinged base 4 encounters an obstacle in the upper section, it can allow the wedge block group 10 to pass smoothly. The second part near the push plate 8 has a small radius of curvature, a large pressure angle, and a small stroke, pulling the anchor cable body 1 back to the bottom in the lower section. The steel plate group 5 is resisted by the coal pillar wall and transmits the resistance to the hollow hinged base 4. The hollow hinged base 4 prevents the wedge block group 10 from retracting and is subjected to the squeezing force from the wedge block group 10. At this time, the central hole 13 is opened by the second part of the non-linear arc surface, achieving self-locking while applying greater squeezing force to the steel plate group 5. By adopting the design of the non-linear arc surface, a higher performance self-locking can be achieved.

[0034] In some embodiments, multiple sets of wedge blocks 10 are fixed on the main rod 9 of the self-locking device, and the multiple sets of wedge blocks 10 are spaced apart by a preset distance, and the multiple sets of wedge blocks 10 constitute a multi-level self-locking mechanism. See Figure 3As shown, in this embodiment, five sets of wedge block groups 10 are provided on the main rod 9 of the self-locking device. Each set of wedge block groups 10 is fixed in a corresponding position, and the wedge-shaped inclined surface of the wedge block in the set of wedge block groups 10 faces the hollow hinged base 4. When a pulling force is applied to the anchor cable body 1 and pulled back to the bottom along the lower section direction, the steel plate group 5 unfolds and fits against the coal pillar wall. The steel plate group 5 is resisted by the coal pillar wall and fits against the hollow hinged base 4. Among the five sets of wedge block groups 10, the set of wedge block groups 10 closest to the push plate 8 is the first wedge block group. The first wedge block group fits against the hollow hinged base 4. The hollow hinged base 4 contacts the main rod 9 of the self-locking device, preventing it from retracting and forming a first-level self-locking mechanism. The wedge block group 10, resisted by the hollow hinged base 4, also prevents the main rod 9 from retracting. When the first-level self-locking fails, the second wedge block group in the multiple wedge block groups 10 contacts the hollow hinged base 4, preventing the main rod 9 from retracting and forming a second-level self-locking mechanism. Thus, after the self-locking mechanism formed by the current wedge block group 10 fails, the next level of self-locking mechanism, composed of the next wedge block group 10, prevents the main rod 9 from retracting. The multiple wedge block groups 10 prevent stress concentration at a single point on the anchorage after entering the collapse zone, improving the overall stability of the anchorage.

[0035] In some embodiments, the hollow hinged base 4 is a cylinder, and a central hole 13 is provided in the center of the hollow hinged base 4, through which the end of the self-locking main rod 9 passes.

[0036] See Figure 3 As shown, in this embodiment, the hollow hinged base 4 has a circular central hole 13 at its center. When a pushing or pulling force is applied to the anchor cable body 1, the force is transmitted to the edge of the circular central hole 13 through the self-locking main rod 9. The circular central hole 13 can evenly distribute and transmit these forces, avoiding stress concentration and preventing the hollow hinged base 4 from cracking or deforming under repeated stress. The circular central hole 13 eliminates the need for directional installation of the hollow hinged base 4, simplifying the installation process and improving the convenience of anchor cable operation.

[0037] In some embodiments, the anchor cable fastening device includes a lock 11 and a tray 12; the lock 11 and the tray 12 are disposed at the second end of the anchor cable body 1, the lock 11 is connected to the tray 12, and the lock 11 is closer to the second end of the anchor cable body 1 than the tray. See Figure 2 As shown, in this embodiment, the locking device 11 is a nut. After being anchored at the first end of the anchor body 1, the tray 12 is subjected to the pressure applied by the locking device 11. The tray 12 contacts the coal pillar wall and transmits the concentrated force from the locking device 11 evenly to the coal pillar wall.

[0038] In some embodiments, the sleeve device 14 is a detachable structure, and the sleeve device 14 can be detached from the anchor cable body 1 and the self-anchoring device 3. In this embodiment, the sleeve device 14 has threads at both ends. A corresponding threaded hole is provided at the end where the anchor cable body 1 is connected to the sleeve device 14, and a corresponding threaded hole is provided on the side where the push plate 8 is connected to the sleeve device 14. The sleeve device 14 is threadedly connected to the push plate 8 and the anchor cable body 1. The use of a detachable structure improves the ease of operation.

[0039] In some embodiments, the push plate 8 is circular, and the diameter of the circular surface of the push plate 8 is larger than the outer diameter of the hollow hinged base 4. In this embodiment, when the anchor cable device is inserted into the pre-set anchor cable hole in the lower section and pushed all the way in, the push plate 8 moves forward with the self-locking main rod 9 and enters the receiving cavity 6, opening up the steel plate group 5 surrounding the self-locking main rod 9. After the push plate 8 enters the receiving cavity, the circular push plate has no sharp edges, which can ensure that the stress distribution is uniform during the pushing process and that the steel plate group opens evenly.

[0040] In some embodiments, the self-locking main rod 9 is a hollow structure or a solid structure.

[0041] In this embodiment, the self-locking main rod 9 is a solid structure. In actual use, the anchor cable device is placed in the preset anchor cable hole in the lower section, and the anchor cable body 1 is pushed to advance along the preset anchor cable hole. The solid structure provides strong compressive and tensile strength, and the self-locking main rod 9 is not easily deformed during pushing and subsequent pull-back operations. It is also simple to process and economical. Optionally, the self-locking main rod 9 is a hollow structure. Using a hollow structure can reduce the weight of the self-locking main rod 9, making it easier to transport, install, and operate.

[0042] See Figure 1 and Figure 2 As shown, in some embodiments, the steel plate group 5 is symmetrically distributed on the hollow hinged base 4. In this embodiment, the hollow hinged base 4 is hinged to a steel plate group 5 containing four steel plates. The four steel plates are arranged around the self-locking main rod 9 and are symmetrically arranged on the hollow hinged base 4. The symmetrical arrangement of the steel plates in the steel plate group 5 allows the steel plate group to unfold synchronously when the anchor cable device is advanced in the upward section and pulled back in the downward section, avoiding stress concentration in the steel plates of the steel plate group 5 during the anchoring process, which could lead to anchoring failure.

[0043] In some embodiments, the anchor cable device is made of metal, which enables the anchor cable device to withstand large thrust and tension during use without breaking or permanent deformation, thereby extending the service life of the anchor.

[0044] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A self-anchoring through-cable device for single-sided operation of coal pillars in goaf excavation, characterized in that, include: Anchor cable body; a sleeve device, the first end of which is fixed to the first end of the anchor cable body; a self-anchoring device, the self-anchoring device being fixed to the second end of the sleeve device. An anchor cable fastening device, wherein the anchor cable fastening device is fixed to the second end of the anchor cable body; The self-anchoring device includes: a self-locking device, the first end of which is fixed to the second end of the sleeve device; a hollow hinged base, the second end of which passes through the hollow hinged base; and a steel plate assembly, which is hinged to the side of the hollow hinged base facing the anchor cable body, and the opposite side of the steel plate assembly surrounds the self-locking device. The self-locking device includes: a push plate, the first end of which is fixed to the second end of the sleeve device; a self-locking device main rod, the first end of which is fixed to the second end of the push plate, the second end of which passes through the hollow hinged base, and a self-locking mechanism is provided on the self-locking device main rod; The steel plate assembly and the hollow hinged base form an umbrella-shaped structure, and the umbrella-shaped structure has a receiving cavity inside.

2. The single-sided self-anchoring through-cable device for coal pillar operation along the goaf as described in claim 1, characterized in that, The self-locking mechanism includes: a wedge block group fixed on the main rod of the self-locking device, wherein each wedge block in the wedge block group is symmetrically arranged around the main rod of the self-locking device; the wedge-shaped inclined surface of each wedge block in the wedge block group faces the hollow hinged base.

3. The single-sided self-anchoring through-cable device for coal pillar operation along the goaf as described in claim 2, characterized in that, Multiple sets of wedge blocks are fixed on the main rod of the self-locking device. The multiple sets of wedge blocks are spaced at a preset distance, and the multiple sets of wedge blocks constitute a multi-level self-locking mechanism.

4. The single-sided self-anchoring through-cable device for coal pillar operation along the goaf as described in claim 1, characterized in that, The hollow hinged base is a cylinder with a central hole at its center, through which the end of the self-locking main rod passes.

5. The single-sided self-anchoring through-cable device for coal pillar operation along the goaf as described in claim 1, characterized in that, The anchor cable fastening device includes a lock and a tray; the lock and the tray are disposed at the second end of the anchor cable body, the lock is connected to the tray, and the lock is closer to the second end of the anchor cable body than the tray.

6. The single-sided self-anchoring through-cable device for coal pillar operation along the goaf as described in claim 1, characterized in that, The sleeve device is a detachable structure and can be removed from the anchor cable body and the self-anchoring device.

7. The single-sided self-anchoring through-cable device for coal pillar operation along the goaf as described in claim 1, characterized in that, The push plate is circular, and the diameter of the circular surface of the push plate is larger than the outer diameter of the hollow hinged base.

8. The single-sided self-anchoring through-cable device for coal pillar operation along the goaf as described in claim 1, characterized in that, The main rod of the self-locking device can be a hollow or solid structure.

9. The single-sided self-anchoring through-cable device for coal pillar operation along the goaf as described in claim 1, characterized in that, The steel plates are symmetrically distributed on the hollow hinged base.

10. The single-sided self-anchoring through-cable device for coal pillar operation along the goaf as described in claim 1, characterized in that, The anchor cable device is made of metal.

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