Pump injection anchoring hollow grouting anchor cable and construction method

Abstract

The application discloses a pump-anchoring hollow grouting anchor cable, which comprises an anchor cable body, a grout-stopping plug, a grout-out bird cage, a grouting pipe, an anchoring pipe and a blocking pipe. The anchor cable body is a hollow structure with open ends. The grout-stopping plug and the grout-out bird cage are arranged on the outer circumferential surface of the anchor cable body. The grouting pipe is communicated with the grout-out bird cage. The top end of the anchoring pipe is inserted into the grouting pipe and located between the top end of the grouting pipe and the grout-out bird cage. The tail end of the anchoring pipe is located outside the grouting pipe. The anchoring pipe is movable along the axial direction of the grouting pipe. The blocking pipe is fixedly arranged in the grouting pipe. The pump-anchoring hollow grouting anchor cable is responsible for grouting and anchoring respectively, and the grouting and anchoring are independently carried out, so that the blockage of the channel by solid particles in the slurry is effectively reduced, the grouting effect is improved, the installation and operation of the anchor cable are more convenient, the construction difficulty is reduced, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grouting anchor cable, in particular to a pump-anchored hollow grouting anchor cable and a construction method. BACKGROUND

[0002] In coal roadway support, grouting anchor cable is a common support method, which fixes the rock mass around the roadway through anchor cable to enhance its stability. The traditional anchor cable anchoring process mainly relies on the friction between the anchor cable and the rock mass for anchoring, but this method has certain limitations, such as limited anchoring length, small initial anchoring force, etc. To solve the shortcomings of traditional anchor cable, CN202311801590.3 discloses a double-channel hollow grouting anchor cable, which pumps anchoring agent into the anchoring pipe and grouts in the annular channel between the anchoring pipe and the outer pipe, thereby increasing the anchoring length and increasing the initial anchoring force of the anchor cable. In addition, the introduction of high-pressure grouting enables the anchor cable to fully exert its active support effect.

[0003] However, in actual use, it is found that this double-channel hollow grouting anchor cable has certain defects. Because the gap of the annular channel is small, the solid particles in the slurry are easy to block the channel, affecting the grouting amount and grouting effect, and further affecting the support performance of the anchor cable. SUMMARY

[0004] The present application aims to at least partially solve one of the technical problems in the related art.

[0005] To this end, an embodiment of the present application proposes a pump-anchored hollow grouting anchor cable.

[0006] The pump-anchored hollow grouting anchor cable of the embodiment of the present application comprises an anchor cable body, a grout stopping plug, a grout outlet birdcage, a grouting pipe, an anchoring pipe and a blocking pipe, the anchor cable body is a hollow structure with open ends; the grout stopping plug and the grout outlet birdcage are arranged on the outer circumferential surface of the anchor cable body at intervals, and the grout stopping plug is arranged adjacent to the top end of the anchor cable body; the grouting pipe is arranged in the anchor cable body and extends along the axial direction of the anchor cable body, the grouting pipe is in communication with the grout outlet birdcage to inject grout into the hole; the top end of the anchoring pipe extends into the grouting pipe and is located between the top end of the grouting pipe and the grout outlet birdcage, the tail end of the anchoring pipe is located outside the grouting pipe, the anchoring pipe is movable along the axial direction of the grouting pipe, and the anchoring pipe is used for injecting anchoring agent into the hole; the blocking pipe is fixedly arranged in the grouting pipe to block the movement of the anchoring pipe towards the top end of the grouting pipe in the axial direction of the grouting pipe.

[0007] In some embodiments, the pump-anchored hollow grouting anchor cable of the embodiment of the present application further comprises a sealing ring arranged between the blocking pipe and the anchoring pipe.

[0008] In some embodiments, the single-sided gap between the anchoring pipe and the grouting pipe is greater than or equal to 0.5 mm.

[0009] In some embodiments, the pump-anchoring hollow grouting anchor cable of the present application further comprises a connector and an anchoring agent injection assembly, the anchoring pipe is in communication with the anchoring agent injection assembly through the connector, and the anchoring agent injection assembly is used for injecting anchoring agent into the anchoring pipe.

[0010] In some embodiments, the connector has coaxially arranged first and second holes, the inner diameter of the first hole is greater than the outer diameter of the anchor cable body, the inner diameter of the second hole is greater than the outer diameter of the anchoring pipe and less than the outer diameter of the grouting pipe, at least a part of the anchor cable body is arranged in the first hole, the anchoring pipe passes through the first hole and the second hole in sequence and is in communication with the anchoring agent injection assembly, a threaded through hole is arranged on the side wall of the first hole, and a fixing screw is arranged on the threaded through hole and used for fixing the anchor cable body.

[0011] In some embodiments, the connector further has a third hole, the third hole is in communication with and coaxially arranged with the second hole, the inner diameter of the third hole is greater than the outer diameter of the anchoring pipe, and the anchoring agent injection assembly comprises an anchoring agent mixing sleeve, the anchoring agent mixing sleeve is threadedly connected with the third hole and is in communication with the anchoring pipe, and is used for injecting anchoring agent into the anchoring pipe.

[0012] In some embodiments, the anchoring agent injection assembly further comprises an adapter sleeve, the adapter sleeve is arranged in the third hole and is threadedly connected with the anchoring pipe at one end, the anchoring agent mixing sleeve is abutted against the end face of the other end of the adapter sleeve, and the anchoring agent mixing sleeve is in communication with the adapter sleeve.

[0013] In some embodiments, a flow mixer is detachably arranged in the anchoring agent mixing sleeve.

[0014] In some embodiments, the pump-anchoring hollow grouting anchor cable of the present application further comprises a main pipe, a first material branch pipe and a second material branch pipe, the main pipe is threadedly connected with the anchoring agent mixing sleeve, and the first material branch pipe and the second material branch pipe are respectively in communication with the main pipe and are used for conveying different anchoring agents into the main pipe.

[0015] The construction method of the pump-anchoring hollow grouting anchor cable of the present application comprises the following steps:

[0016] S1: First, anchoring agent is injected into the hole through the anchoring pipe;

[0017] S2: After the anchoring agent is solidified, the anchoring pipe is pulled out of the grouting pipe;

[0018] S3: Grouting into the cavity through the grouting pipe.

[0019] Compared with the related art, the pump-anchoring hollow grouting anchor cable of the embodiment of the present application effectively reduces the blockage of the channel by the solid particles in the slurry, improves the grouting effect, makes the installation and operation of the anchor cable more convenient, reduces the construction difficulty, and improves the construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a use schematic diagram of the pump-anchoring hollow grouting anchor cable of the embodiment of the present application.

[0021] Figure 2 is a partial enlarged view of the pump-anchoring hollow grouting anchor cable of the embodiment of the present application.

[0022] Figure 3 is a partial enlarged view of the pump-anchoring hollow grouting anchor cable of the embodiment of the present application.

[0023] Reference signs:

[0024] 100, pump-anchoring hollow grouting anchor cable; 1, anchor cable body; 2, grout stopper; 3, grout outlet birdcage; 4, grouting pipe; 5, anchoring pipe; 7, blocking pipe; 8, connector; 801, first hole; 802, second hole; 803, third hole; 9, fixing screw; 10, anchoring agent mixing sleeve; 11, adapter sleeve; 12, flow mixer; 13, main material pipe; 14, first material conveying branch pipe; 15, second material conveying branch pipe. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0026] The pump-anchoring hollow grouting anchor cable 100 of the embodiment of the present application comprises an anchor cable body 1, a grout stopper 2, a grout outlet birdcage 3, a grouting pipe 4, an anchoring pipe 5, and a blocking pipe 7. The anchor cable body 1 is a hollow structure with both ends open, the grout stopper 2 and the grout outlet birdcage 3 are arranged on the outer circumferential surface of the anchor cable body 1 at intervals, and the grout stopper 2 is arranged adjacent to the top end of the anchor cable body 1. The grouting pipe 4 is arranged in the anchor cable body 1 and extends along the axial direction of the anchor cable body 1, the grouting pipe 4 is in communication with the grout outlet birdcage 3 to grout into the hole. The top end of the anchoring pipe 5 extends into the grouting pipe 4 and is located between the top end of the grouting pipe 4 and the grout outlet birdcage 3, the tail end of the anchoring pipe 5 is located outside the grouting pipe 4, the anchoring pipe 5 is movable along the axial direction of the grouting pipe 4, and the anchoring pipe 5 is used for injecting anchoring agent into the hole. The blocking pipe 7 is fixedly arranged in the grouting pipe 4 and is used for blocking the anchoring pipe 5 from moving towards the top end of the grouting pipe 4 in the axial direction of the grouting pipe 4.

[0027] The pump-anchoring hollow grouting anchor cable 100 of the embodiment of the present application is placed in the pre-formed hole in use, first, the anchoring agent is injected into the anchoring pipe 5, the anchoring agent in the anchoring pipe 5 passes through the blocking pipe 7 and enters the hole from the top end of the grouting pipe 4, the setting of the blocking pipe 7 prevents the anchoring pipe 5 from moving to the top end of the grouting pipe 4 during the grouting process, and ensures the accurate injection of the anchoring agent. The grouting plug 2 can prevent the anchoring agent from flowing back in the hole, so that the anchoring agent forms an integral whole with the rock mass after solidification, and enhances the stability and bearing capacity of the rock mass. After the anchoring agent solidifies, the anchoring pipe 5 is pulled out of the grouting pipe 4. After the anchoring pipe 5 is pulled out, grouting is performed in the grouting pipe 4, and the slurry in the grouting pipe 4 passes through the slurry outlet birdcage 3 to fill the hole, further reinforcing the rock mass, forming a continuous reinforced layer, and improving the stability and safety of the roadway.

[0028] Therefore, the pump-anchoring hollow grouting anchor cable 100 of the embodiment of the present application is responsible for grouting and anchoring respectively by the grouting pipe 4 and the anchoring pipe 5, and the grouting and anchoring are independently performed, compared with the related art, effectively reducing the blockage of the channel by the solid particles in the slurry, improving the grouting effect, making the installation and operation of the anchor cable more simple, reducing the construction difficulty, and improving the construction efficiency.

[0029] In some embodiments, the pump-anchoring hollow grouting anchor cable 100 of the embodiment of the present application further comprises a sealing ring, which is arranged between the blocking pipe 7 and the anchoring pipe 5.

[0030] The sealing ring ensures that no anchoring agent leaks at the connection between the anchoring pipe 5 and the blocking pipe 7, and prevents the anchoring agent from blocking the gap between the grouting pipe 4 and the anchoring pipe 5, thereby preventing the anchoring pipe 5 from being unable to be pulled out of the grouting pipe 4, and is beneficial to improve the working reliability of the pump-anchoring hollow grouting anchor cable 100 of the embodiment of the present application.

[0031] In some embodiments, the one-side gap between the anchoring pipe 5 and the grouting pipe 4 is greater than or equal to 0.5 mm.

[0032] The one-side gap between the anchoring pipe 5 and the grouting pipe 4 is greater than or equal to 0.5 mm, so that the anchoring pipe 5 can be quickly pulled out of the grouting pipe 4, which is beneficial to improve the working efficiency.

[0033] In some embodiments, the pump-anchoring hollow grouting anchor cable 100 of the embodiment of the present application further comprises a connector 8 and an anchoring agent injection assembly, the anchoring pipe 5 is connected to the anchoring agent injection assembly through the connector 8, and the anchoring agent injection assembly is used for injecting the anchoring agent into the anchoring pipe 5.

[0034] As Figure 3As shown, the anchor agent injection assembly is used to inject anchor agent into the anchor tube 5, which forms an integral part with the rock mass after solidification in the hole, enhancing the anchoring effect. The injection assembly can control the injection speed and pressure of the anchor agent to adapt to different geological conditions and anchoring requirements. The connector 8 provides mechanical connection between the anchor tube 5 and the anchor agent injection assembly, ensuring smooth transmission of the anchor agent into the anchor tube 5.

[0035] The pump-anchored hollow grouting anchor cable 100 of the embodiment of the present application can more effectively fill rock fissures and improve anchoring performance by precisely controlling the injection of anchor agent. The modular design makes construction more flexible, allowing quick adjustment and replacement of components according to different construction needs. The reliable connector 8 and injection assembly design reduces safety risks during construction. Due to the ease of replacement and maintenance of components, the maintenance cost of the entire system is reduced.

[0036] In some embodiments, the connector 8 has coaxially arranged first and second holes 801 and 802, the inner diameter of the first hole 801 is greater than the outer diameter of the anchor cable body 1, and the inner diameter of the second hole 802 is greater than the outer diameter of the anchor tube 5 and less than the outer diameter of the grouting tube 4. At least a portion of the anchor cable body 1 is placed in the first hole 801, the anchor tube 5 passes through the first hole 801 and the second hole 802 in sequence and communicates with the anchor agent injection assembly, and a threaded through hole is formed in the side wall of the first hole 801, and a fixing screw 9 is arranged on the threaded through hole. The fixing screw 9 is used to fix the anchor cable body 1.

[0037] The inner diameter of the first hole 801 is greater than the outer diameter of the anchor cable body 1, which allows at least a portion of the anchor cable body 1 to be placed in the first hole 801, providing space for the fixation of the anchor cable body 1. When a portion of the anchor cable body 1 is placed in the first hole 801, the anchor cable body 1 is fixed in the first hole 801 by screwing the fixing screw 9.

[0038] The pump-anchored hollow grouting anchor cable 100 of the embodiment of the present application can more effectively fill rock fissures and improve anchoring performance by precisely controlling the injection of anchor agent. The modular design makes construction more flexible, allowing quick adjustment and replacement of components according to different construction needs. The reliable connector 8 and injection assembly design reduces safety risks during construction. Due to the ease of replacement and maintenance of components, the maintenance cost of the entire system is reduced.

[0039] In some embodiments, the connector 8 further has a third hole 803 which is in communication with the second hole 802 and coaxially arranged, wherein the inner diameter of the third hole 803 is larger than the outer diameter of the anchoring tube 5. The anchoring agent injection assembly comprises an anchoring agent mixing sleeve 10 which is threadedly connected with the third hole 803 and in communication with the anchoring tube 5, for injecting anchoring agent into the anchoring tube 5.

[0040] The third hole 803 is in communication with the second hole 802, ensuring that the anchoring agent can be smoothly transmitted from the anchoring agent injection assembly into the anchoring tube 5. The third hole 803 is coaxially arranged with the second hole 802, maintaining the neatness and stability of the structure of the connector 8. The inner diameter of the third hole 803 is larger than the outer diameter of the anchoring tube 5, ensuring that the anchoring tube 5 can smoothly pass through the third hole 803, while providing installation space for the anchoring agent mixing sleeve 10.

[0041] The design of the third hole 803 and the anchoring agent mixing sleeve 10 of the pump-in anchoring hollow grouting anchor cable 100 of the embodiments of the present application enables the anchoring agent to be efficiently injected into the anchoring tube 5, reducing the injection time and labor intensity. The arrangement of the third hole 803 makes the structure of the connector 8 more compact and reasonable, which helps to improve the stability and durability of the overall system. The integrated design of the anchoring agent injection assembly simplifies the construction operation and improves the construction efficiency. The threaded connection and coaxial arrangement ensure the reliability of the connector 8 and reduce the problems that may occur during high-pressure grouting.

[0042] In some embodiments, the anchoring agent injection assembly further comprises an adapter sleeve 11 which is arranged in the third hole 803 and threadedly connected with the anchoring tube 5 at one end, and the anchoring agent mixing sleeve 10 is abutted against the end face of the other end of the adapter sleeve 11, and the anchoring agent mixing sleeve 10 is in communication with the adapter sleeve 11.

[0043] It should be noted that, due to the thin wall thickness of the anchoring tube 5, connecting the adapter sleeve 11 with the anchoring agent mixing sleeve 10 can avoid damaging the structure of the anchoring tube 5 during communication, which is beneficial to improve the service life of the anchoring tube 5. In addition, the design of the adapter sleeve 11 and the anchoring agent mixing sleeve 10 makes the installation process simpler, and the construction personnel can quickly complete the installation of the assembly.

[0044] In some embodiments, a mixing device 12 is detachably arranged in the anchoring agent mixing sleeve 10.

[0045] The flow mixer 12 can ensure uniform mixing of the anchoring agent, thereby improving the quality of the anchoring agent and the anchoring effect. The detachable flow mixer 12 allows the construction personnel to quickly adjust the flow mixer 12 according to different construction needs, enhancing the flexibility of the construction. The use of the flow mixer 12 helps to optimize the grouting process, ensuring that the anchoring agent can reach the best state when injected into the rock fissure. Through the uniform mixing effect of the flow mixer 12, material waste caused by uneven mixing of the anchoring agent can be reduced. The presence of the flow mixer 12 helps to improve the reliability of the entire anchoring system, as it ensures the uniformity and stability of the anchoring agent. The detachable design of the flow mixer 12 also makes it easier to clean the anchoring sleeve after the construction is completed, reducing the difficulty and time of cleaning.

[0046] In some embodiments, the pump-anchored hollow grouting anchor cable 100 of the present embodiment further comprises a main pipe 13, a first feeding branch pipe 14 and a second feeding branch pipe 15. The main pipe 13 is threadedly connected with the anchoring agent mixing sleeve 10, and the first feeding branch pipe 14 and the second feeding branch pipe 15 respectively communicate with the main pipe 13 for conveying different anchoring agents into the main pipe 13.

[0047] The first feeding branch pipe 14 and the second feeding branch pipe 15 are respectively used for conveying anchoring agents of different components, which can be anchoring agents of different chemical components or different physical states (such as liquid and powder). By controlling the conveying flow of the first feeding branch pipe 14 and the second feeding branch pipe 15, the mixing ratio of the anchoring agents of different components can be accurately controlled to achieve the best anchoring effect. The design of the main pipe 13 and the feeding branch pipes ensures that the anchoring agents can be uniformly mixed in the mixing sleeve, thereby improving the quality of the anchoring agents and the anchoring effect. By using different anchoring agent components, the performance of the anchoring agent can be adjusted according to different geological conditions and engineering needs, enhancing the flexibility of the construction.

[0048] The construction method of the pump-anchored hollow grouting anchor cable 100 of the present embodiment comprises:

[0049] S1: First, inject the anchoring agent into the hole through the anchoring pipe 5. The setting process of the anchoring agent forms an integral whole with the rock mass, enhancing the stability and bearing capacity of the rock mass.

[0050] S2: After the anchoring agent is set, the anchoring pipe 5 is pulled out from the grouting pipe 4;

[0051] S3: Grout into the cavity through the grouting pipe 4. The slurry fills the hole, further reinforcing the rock mass, forming a continuous reinforcement layer, and improving the stability and safety of the roadway.

[0052] Therefore, the construction method of the pump-anchored hollow grouting anchor cable 100 of the embodiment of the present application respectively uses the grouting pipe 4 and the anchoring pipe 5 for grouting and anchoring, and the grouting and anchoring are independently performed, compared with the related art, the blockage of the channel by the solid particles in the slurry is effectively reduced, the grouting effect is improved, the installation and operation of the anchor cable are more convenient, the construction difficulty is reduced, and the construction efficiency is improved.

[0053] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0054] In addition, the terms “first” and “second” are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “a plurality of” is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0055] In the present application, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting”, “fixing” and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium; can be the communication or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] In the present application, unless otherwise explicitly specified and limited, the first feature is “on” or “under” the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0057] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising but not limited to, that is, it is open-ended and does not exclude the presence of additional features, structures, materials, or characteristics.

[0058] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and the ordinary skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present disclosure.

Claims

1. A pump-in anchoring hollow grouting anchor cable, characterized in that, The utility model relates to a kind of injection device for anchor cable, including: Anchor cable body (1), the anchor cable body (1) is hollow structure of both ends open; Slurry stopper (2) and slurry birdcage (3), slurry stopper (2) and slurry birdcage (3) are spaced apart on the outer circumferential surface of the anchor cable body (1), and slurry stopper (2) is adjacent to the top end of the anchor cable body (1) is arranged; Slurry pipe (4), slurry pipe (4) is arranged in the anchor cable body (1) and extends along the axial direction of the anchor cable body (1), and slurry pipe (4) is communicated with slurry birdcage (3), to inject slurry into hole; Anchor pipe (5), the top end of anchor pipe (5) extends into slurry pipe (4) and is located between the top end of slurry pipe (4) and slurry birdcage (3), and the tail end of anchor pipe (5) is located outside slurry pipe (4), and anchor pipe (5) is movable along the axial direction of slurry pipe (4), and anchor pipe (5) is used to inject anchor agent into hole; Stop pipe (7), stop pipe (7) is fixedly arranged in slurry pipe (4), for stopping anchor pipe (5) from moving towards the top end of slurry pipe (4) in the axial direction of slurry pipe (4); Further comprising connector (8) and anchor agent injection assembly, anchor pipe (5) is communicated with anchor agent injection assembly through connector (8), and anchor agent injection assembly is used to inject anchor agent into anchor pipe (5); The connector (8) has coaxially arranged first hole (801) and second hole (802), the inner diameter of the first hole (801) is greater than the outer diameter of the anchor cable body (1), the inner diameter of the second hole (802) is greater than the outer diameter of the anchor pipe (5) and less than the outer diameter of the slurry pipe (4), at least a portion of the anchor cable body (1) is arranged in the first hole (801), the anchor pipe (5) passes through the first hole (801) and the second hole (802) in sequence and is communicated with the anchor agent injection assembly, the threaded through hole is provided on the side wall of the first hole (801), and the fixed screw rod (9) is arranged on the threaded through hole, and the fixed screw rod (9) is used to fix the anchor cable body (1); The connector (8) further has third hole (803), the third hole (803) is communicated with the second hole (802) and coaxially arranged, wherein the inner diameter of the third hole (803) is greater than the outer diameter of the anchor pipe (5), and the anchor agent injection assembly comprises anchor agent mixing sleeve (10), the anchor agent mixing sleeve (10) is threadedly connected with the third hole (803) and is communicated with the anchor pipe (5), for injecting anchor agent into the anchor pipe (5).

2. The pump-anchored hollow grouting anchor cable according to claim 1, characterized in that Further comprising sealing ring, the sealing ring is arranged between the stop pipe (7) and the anchor pipe (5).

3. The pump-anchored hollow grouting anchor cable according to claim 1, characterized in that The single-sided gap between the anchor pipe (5) and the slurry pipe (4) is greater than or equal to 0.5 mm.

4. The pump-anchored, hollow grouting anchor cable of claim 1, wherein, The anchor agent injection assembly further comprises an adapter sleeve (11) arranged in the third hole (803) and threadedly connected with the anchor pipe (5) at one end, and the anchor agent mixing sleeve (10) is abutted against the end face of the other end of the adapter sleeve (11), and the anchor agent mixing sleeve (10) is in communication with the adapter sleeve (11).

5. The pump-anchored, hollow grouting anchor cable of claim 4, wherein, A flow mixer (12) is detachably arranged in the anchor agent mixing sleeve (10).

6. The pump-anchored, hollow grouting anchor cable of claim 5, wherein, Further comprising a main pipe (13), a first sub-pipe (14) and a second sub-pipe (15), the main pipe (13) is threadedly connected with the anchor agent mixing sleeve (10), and the first sub-pipe (14) and the second sub-pipe (15) are respectively in communication with the main pipe (13) for conveying different anchor agents into the main pipe (13).

7. A method of installing a pump-anchored hollow grouting anchor according to any one of claims 1-6, characterized in that, Comprise: S1: first injecting anchor agent into the hole through the anchor pipe (5); S2: after the anchor agent is solidified, the anchor pipe (5) is pulled out from the grouting pipe (4); S3: grouting into the hole through the grouting pipe (4).

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