Method for replacing resin in an anchor rod by high pressure liquid and anchor rod

Abstract

The application belongs to the technical field of anchor rod support, and particularly relates to a method for replacing resin in an anchor rod with high-pressure liquid and an anchor rod. The method is to seal-connect the outer skin of a cartridge with the inner wall of a cavity accommodating the cartridge, isolate the cavity into a replacement cavity and a liquid channel by the upper part of the outer skin after the lower part of the outer skin is broken, and replace the liquid in the cartridge with fluid on one side of the replacement cavity through extrusion of the fluid, and the liquid flows out through the liquid channel. The anchor rod comprises a rod body assembly and a rod core assembly. The rod body assembly comprises a rod body and a drill bit, and the rod core assembly is filled in the rod body. The first fluid channel is formed between the rod core assembly and the rod body, and the second fluid channel is constructed in the rod core assembly. The anchor rod integrates multiple functions such as punching, anchor agent stirring and anchoring into one, and realizes a leap simplification from multiple steps to a single process. Through the design, the traditional supporting process originally completed in six steps is greatly compressed to one step, and the supporting operation cycle is greatly shortened.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of anchor rod support, and particularly relates to a method for replacing resin in an anchor rod with high-pressure liquid and an anchor rod. BACKGROUND

[0002] At present, a significant challenge faced by the coal mine industry in China lies in the insufficient degree of mechanization and automation, which directly leads to slow roadway excavation speed and low production efficiency, and seriously hinders the further improvement of coal mine production capacity. One of the core problems lies in the complexity of the anchor rod support technology and its high dependence on manual operation, which not only increases the labor intensity of workers, but also significantly reduces the construction efficiency. The traditional anchor rod support process is complicated, covering drilling, drill removal, manual filling of anchoring agent, anchor rod installation, anchoring agent stirring and pre-tightening of the anchor rod, and the whole process is time-consuming and inefficient, which cannot match the urgent needs of coal mines for efficient support technology.

[0003] In view of this problem, the industry has explored new support methods such as hollow grouting anchor rods, but in actual application, it still faces the problem of difficulty in accurately controlling the grouting amount. Improper grouting amount (too much or too little) will adversely affect the support effect, and the inconvenience of operation also limits its widespread promotion and application. Therefore, how to effectively simplify the anchor rod construction process, improve the construction efficiency and support quality has become a key technical problem to be solved in the current coal mine industry. SUMMARY

[0004] The application is to solve the problem of difficulty in accurately controlling the grouting amount of the resin anchor rod.

[0005] The application provides the following technical scheme: a method for replacing resin in an anchor rod with high-pressure liquid, the outer skin of the cartridge is sealingly connected with the inner wall of the cartridge cavity containing the cartridge, the lower part of the outer skin is broken, and the upper part of the outer skin separates the cavity into a replacement cavity and a liquid channel, fluid is introduced into one side of the replacement cavity, the fluid is extruded to replace the liquid in the cartridge, and the liquid flows out through the liquid channel.

[0006] An anchor rod adopts the method for replacing resin in an anchor rod with high-pressure liquid described above, and comprises a rod body assembly and a rod core assembly.

[0007] The rod body assembly comprises a rod body and a drill bit, one end of the rod body is connected with the drill bit, and the water distribution channel of the drill bit is in communication with the inside of the rod body.

[0008] The rod core assembly is filled in the rod body, a first fluid channel is formed between the rod core assembly and the rod body, and a second fluid channel is constructed in the rod core assembly.

[0009] The inlet of the second fluid channel is used to be connected with the core shaft of the drill box, and the outlet of the second fluid channel is communicated with the water distribution channel of the drill bit; the plug, the cartridge, the sharp and the stirring channel are arranged in the second fluid channel;

[0010] The inlet of the first fluid channel is located in the second fluid channel outside the plug, the outlet of the first fluid channel and the outlet of the stirring channel are communicated, the one-way sealing structure is arranged in the second fluid channel, the one-way sealing structure closes the outlet of the stirring channel when the fluid in the first fluid channel flows to the water distribution channel of the drill bit, and the one-way sealing structure closes the outlet of the first fluid channel when the fluid in the stirring channel flows to the water distribution channel of the drill bit;

[0011] The second fluid channel comprises a plug sealing section and a plug gap section, the plug closes the second fluid channel when being located in the plug sealing section, and fluid can flow into the second fluid channel through the plug when being located in the plug gap section; the cartridge is located between the plug and the sharp, and the outer skin of the cartridge close to the sharp is sealingly connected with the second fluid channel.

[0012] Further, the rod core assembly comprises a guide, a long condition and a ring frame, the inner ring of the ring frame is sealingly connected with the outer skin of the cartridge, the outer ring of the ring frame is slidingly sealed with the second fluid channel, the guide is slidingly connected with the second fluid channel, the guide is connected with the plug, the guide is provided with an axial channel, the long condition is connected between the guide and the ring frame, and the outer skin of the cartridge is connected with the guide.

[0013] Further, the rod core assembly comprises a sealingly connected connecting sleeve, an elastic supporting sleeve and a supporting sleeve, the inner hole of the connecting sleeve is sealingly connected with the outer skin of the cartridge, the outer wall of the connecting sleeve is slidingly connected with the second fluid channel, and the supporting sleeve is sealingly connected with the second fluid channel.

[0014] Further, the rod core assembly comprises a first sleeve, a first long tube and a second long tube, the first sleeve, the first long tube and the second long tube are sequentially connected, the inner diameter of the first long tube is larger than that of the first sleeve, the first sleeve serves as the plug sealing section, the first long tube serves as the plug gap section, the cartridge is located in the first long tube, and the spiral structure channel in the second long tube serves as the stirring channel.

[0015] Further, the front section of the second long tube is the stirring channel, the third long tube is inserted into the rear section of the second long tube, the fourth long tube is nested between the outlet end of the third long tube and the second long tube, the sliding sealing section and the gap matching section exist between the fourth long tube and the second long tube, the gap matching section is connected with the water distribution channel of the drill bit, the outlet of the first fluid channel is located at the sliding sealing section of the second long tube and the fourth long tube, the outlet end of the fourth long tube is closed, the lateral hole is formed in the wall of the fourth long tube, and the lateral hole is staggered with the outlet of the first fluid channel.

[0016] Further, the shaft assembly further comprises a pad, a hemispherical pad, a first lock sleeve and a second lock sleeve; the first lock sleeve, the second lock sleeve, the hemispherical pad and the pad are sequentially sleeved on the rod body, the first lock sleeve and the second lock sleeve are screwed with the shaft, and the hemispherical pad and the pad are freely movable along the length direction of the shaft.

[0017] Further, the spiral structure channel in the second long tube is divided into multiple sections, including alternately distributed left-handed sections and right-handed sections.

[0018] Compared with the prior art, the advantages of the present application are that:

[0019] The anchor rod integrates multiple functions such as punching, anchor agent stirring and anchoring into one, realizing a leap simplification from complex multi-steps to a single process. Through this design, the traditional supporting process which originally needs six steps is greatly compressed to one step, greatly shortening the supporting operation cycle and significantly improving the construction efficiency and operation speed. This innovation not only simplifies the operation process, but also is expected to improve the overall reliability of the supporting structure by reducing manual intervention and shortening the construction time, providing strong support for the safety production and efficient operation of the coal industry.

[0020] The anchor rod has a low-pressure water independent channel and a high-pressure water pushing resin anchor agent channel, the low-pressure water is used for cooling the drilling, and the high-pressure water is used for replacing the resin cartridge; the two channels can be completely independent. On the one hand, it prevents low-pressure water from entering the resin storage cavity, which can ensure the anchoring quality of the resin anchor agent; on the other hand, it prevents the resin anchor agent from entering the low-pressure water channel, which can improve the utilization rate of the resin and maximize the extrusion of the stored resin in the cavity into the anchor rod pores. By extruding and replacing the liquid in the cartridge through high-pressure water, the pushing amount of the resin can be accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the assembly of the anchor rod;

[0022] Figure 2 It is a schematic diagram of the shaft assembly;

[0023] Figure 3 It is a schematic diagram of the rod core assembly;

[0024] Figure 4 It is Figure 3 It is a sectional view at A-A;

[0025] Figure 5 It is a schematic diagram of the second limiting mode of the cartridge;

[0026] Figure 6 It is a schematic diagram of the low-pressure water channel inlet;

[0027] Figure 7 It is a schematic diagram of the high-pressure water channel inlet.

[0028] Figure: 100 - rod assembly; 101 - first lock sleeve; 102 - second lock sleeve; 103 - hemisphere pad; 104 - sticker; 105 - rod; 106 drill bit; 200 - rod core assembly; 201 - first sleeve; 202 - plug; 203 - first sealing ring; 204 - guide; 205 - first long tube; 206 - cartridge; 207 - long condition; 208 - ring frame; 209 - second sealing ring; 210 - sharp; 211 - spiral structure channel; 212 - second long tube; 213 - third long tube; 214 - fourth long tube; 215 - third sealing ring; 216 - inlet of first fluid channel; 217 - outlet of first fluid channel; 218 - axial channel; 219 - lateral hole; 220 - connecting sleeve; 221 - elastic support sleeve; 222 - support sleeve; 301 - drill sleeve; 302 - shaft sleeve; 303 - mandrel. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0030] Embodiment 1

[0031] A method for replacing the resin in the anchor rod by high-pressure liquid, the outer skin of the cartridge is sealingly connected with the inner wall of the cavity accommodating the cartridge, the lower part of the outer skin of the cartridge is broken, and the upper part of the outer skin separates the cavity into a replacement cavity and a drug liquid channel, a fluid is introduced into one side of the replacement cavity, the drug liquid in the cartridge is replaced by extrusion of the fluid, and the drug liquid flows out through the drug liquid channel.

[0032] Embodiment 2

[0033] As shown in Figure 1 , Figure 2 , Figure 3 : an anchor rod, using the method for replacing the resin in the anchor rod by high-pressure liquid of embodiment 1, comprising a rod assembly 100 and a rod core assembly 200.

[0034] The rod assembly 100 comprises a rod 105 and a drill bit 106, the rod 105 is made of standard metal material to ensure its strength and durability, one end of the rod 105 is connected with the drill bit 106, and the water distribution channel of the drill bit 106 is in communication with the inside of the rod 105.

[0035] The shaft assembly 100 further comprises a pad 104, a hemispherical pad 103, a first lock sleeve 101 and a second lock sleeve 102; the first lock sleeve 101, the second lock sleeve 102, the hemispherical pad 103 and the pad 104 are sequentially sleeved on the shaft body 105, the first lock sleeve 101 and the second lock sleeve 102 are threadedly combined with the shaft body 105, and the hemispherical pad 103 and the pad 104 can freely move along the length direction of the shaft body 105.

[0036] The rod core assembly 200 is filled in the shaft body 105; a first fluid channel is formed between the rod core assembly 200 and the shaft body 105, that is, the annular space gap between the rod core assembly 200 and the shaft body 105 serves as the first fluid channel, and a second fluid channel is constructed in the rod core assembly 200; the first fluid channel is a low-pressure water channel for water injection when the anchor rod is drilled, and the second fluid channel is a high-pressure water channel for replacing the liquid medicine in the cartridge through high-pressure water extrusion.

[0037] The inlet of the second fluid channel is used for butt joint with the core shaft of the drill box, and the outlet of the second fluid channel is communicated with the water distribution channel of the drill bit 106; the second fluid channel is provided with a plug 202, a cartridge 206, a sharp 210 and a stirring channel.

[0038] The inlet 216 of the first fluid channel is located in the second fluid channel outside the plug 202, after the core shaft of the drill box is inserted into the second fluid channel, the core shaft blocks the inlet 216 of the first fluid channel, the water outlet of the core shaft is entirely introduced into the second fluid channel, the outlet of the first fluid channel 217 and the outlet of the stirring channel are communicated, a one-way sealing structure is arranged in the second fluid channel, the one-way sealing structure closes the outlet of the stirring channel when the fluid in the first fluid channel flows to the water distribution channel of the drill bit 106, and the one-way sealing structure closes the outlet 217 of the first fluid channel when the fluid in the stirring channel flows to the water distribution channel of the drill bit 106.

[0039] The second fluid channel comprises a plug sealing section and a plug gap section; the plug 202 closes the second fluid channel when located in the plug sealing section, and water cannot enter the inside of the second fluid channel through the plug 202; when the plug 202 is located in the plug gap section, fluid can flow into the inside of the second fluid channel through the plug 202; the cartridge 206 is located between the plug 202 and the sharp 210, and the outer skin of the side close to the sharp 210 is sealingly connected with the second fluid channel.

[0040] Regarding the connection mode of the shaft body 105 and the drill bit 106, two options are provided: one is to be tightly connected through threads, and the other is to be fixed by using a welding process. The drill bit 106 serves as an initial drilling tool, and its design fully considers economy and practicability, that is, a one-word drill bit inlaid with an alloy can be selected and matched to cope with general drilling requirements, or a cross drill bit can be selected, especially when deeper drilling operation is required, and the best choice is made according to the specific cost control consideration.

[0041] The rod core assembly 200 is made of non-metallic material with corrosion resistance, low-temperature resistance and high-temperature resistance to ensure its stability and durability in various extreme environments.

[0042] The cartridge 206 is limited in the second fluid channel in two ways. The first limiting way is that the rod core assembly 200 includes a guide 204, a long condition 207 and a ring stand 208, the inner ring of the ring stand 208 is sealingly connected with the outer skin of the cartridge 206, the outer ring of the ring stand 208 is slidingly sealed with the second fluid channel, the guide 204 is slidingly matched with the second fluid channel, the guide 204 is connected with the plug 202, the guide 204 is provided with an axial channel 218 through which high-pressure water flows, the guide 204 supports the plug 202 so that the plug 202 is always located at the center of the second fluid channel, the long condition 207 is connected between the guide 204 and the ring stand 208, the long condition 207 is located outside the cartridge 206, the outer skin of the cartridge 206 is connected with the guide 204 to prevent the cartridge 206 from falling off and the outer skin of the cartridge 206 from being broken due to touching the sharp instrument 210, the high-pressure water can be mixed with the drug solution through the outer skin of the cartridge 206, and the ring stand 208 and the second fluid channel are sealed by a second sealing ring 209 on the ring stand 208.

[0043] As shown in Figure 5 The second limiting way is that the rod core assembly 200 includes a sealingly connected connecting sleeve 220, an elastic supporting sleeve 221 and a supporting sleeve 222, the inner hole of the connecting sleeve 220 is sealingly connected with the outer skin of the cartridge 206, the outer wall of the connecting sleeve 220 is slidingly contacted with the second fluid channel, and the supporting sleeve 222 is sealingly connected with the second fluid channel. The supporting sleeve 222 serves as protection and limiting to prevent the elastic supporting sleeve 221 or the cartridge 206 from being pierced by the sharp instrument 210.

[0044] The rod core assembly 200 includes a first sleeve 201, a first long tube 205 and a second long tube 212, which are sequentially connected, and are stably connected by glue bonding between the first sleeve 201, the first long tube 205 and the second long tube 212, the inner diameter of the first long tube 205 is larger than that of the first sleeve 201, the first sleeve 201 serves as a plug sealing section, the first long tube 205 serves as a plug gap section, the plug 202 and the first sleeve 201 are sealed by a first sealing ring 203, and are reinforced by glue bonding between the plug 202 and the first sleeve 201 to effectively prevent water leakage and accidental pushing of the plug 202 by low-pressure water, the cartridge 206 is located in the first long tube 205, and a spiral structure channel in the second long tube 212 serves as a stirring channel. The sharp instrument 210 is fixed in the second long tube 212 by glue.

[0045] The spiral structure channel in the second long tube 212 is divided into multiple sections, including alternating left-handed sections and right-handed sections, so that the liquid medicine is fully mixed to ensure its uniformity and use effect.

[0046] The front section of the second long tube 212 is a stirring channel, and the third long tube 213 is inserted into the rear section. The outlet end of the third long tube 213 is nested with the fourth long tube 214 between the second long tube 212. There is a sliding sealing section and a gap fitting section between the fourth long tube 214 and the second long tube 212. The gap fitting section is connected to the water distribution channel of the drill bit 106. The outlet 217 of the first fluid channel is located at the sliding sealing section between the second long tube 212 and the fourth long tube 214. The outlet end of the fourth long tube 214 is closed. The fourth long tube 214 and the second long tube 212 are sealed by the third sealing ring 215. The fourth long tube 214 has a lateral hole 219 on its wall, which is staggered with the outlet 217 of the first fluid channel. When water flows out of the first fluid channel, the outlet end of the fourth long tube 214 is closed, so water cannot flow back into the stirring channel. When the liquid medicine in the stirring channel flows out, the pressure of the liquid medicine pushes the fourth long tube 214 to move towards the drill bit 106. The fourth long tube 214 and the second long tube 212 transition from the sliding sealing section to the gap fitting section. Since the lateral hole 219 on the fourth long tube 214 is staggered with the outlet 217 of the first fluid channel, the fourth long tube 214 closes the outlet 217 of the first fluid channel. When the fourth long tube 214 moves to the gap fitting section at the lateral hole 219, the liquid medicine flows out of the lateral hole 219 and flows to the drill bit 106 through the gap between the fourth long tube 214 and the second long tube 212.

[0047] The shaft 105 adopts a left-handed wave thread design. When used with the second lock sleeve 102, the second lock sleeve 102 rotates clockwise to move away from the first lock sleeve 101, and the second lock sleeve 102 rotates counterclockwise to move closer to the first lock sleeve 101. Before the anchor rod drilling operation, the anchor rod is placed on the drill sleeve 301 of the drilling machine, and the lower surface of the second lock sleeve 102 is in close contact with the bottom surface of the drill sleeve. The drill sleeve 301 rotates under the drive of external force to transmit the necessary torque. The shaft sleeve 302 is installed concentrically with the drill sleeve 301 as a non-rotating component and is sealed by a sealing ring to effectively prevent water leakage. The mandrel 303 is installed at the center of the shaft sleeve 302 and can move up and down to provide water source for the entire system. This system uses the same waterway to sequentially supply low-pressure water and high-pressure water: low-pressure water is used for drilling and cooling, and high-pressure water is used for extruding and replacing the liquid medicine in the medicine roll 206. In addition, the interface between the drill sleeve 301 and the second lock sleeve 102 is designed as an internal hexagon or an internal dodecagon to facilitate connection and operation.

[0048] The working process of the anchor rod is as follows:

[0049] Drilling: The drill sleeve 301 is rotated counterclockwise, which drives the second locking sleeve 102 to move towards the first locking sleeve 101. When the second locking sleeve 102 contacts the first locking sleeve 101, the first locking sleeve 101 will lock it and restrict its further movement. At this time, the torque transmitted by the second locking sleeve 102 effectively acts on the rod body 105, driving it to perform the drilling operation. At the same time, the mandrel 303 is responsible for providing low-pressure water, which is mainly used for cooling during drilling. Since the plug 202 and the first sleeve 201 are sealed and fixed, low-pressure water flows into the first fluid channel through the inlet 216 of the first fluid channel, then flows out of the outlet 217 of the first fluid channel, and finally enters the drill bit 106 and flows out from the side, effectively cooling the drilling area. When the anchor drilling reaches the predetermined depth, i.e., the contact plate 104 is about to contact the roadway roof, the drilling operation stops.

[0050] Pushing the cartridge: After the drilling operation is completed, the mandrel 303 moves upward in the drill sleeve 301, pushing the plug 202, which makes the glue that originally fixed the plug 202 lose its effectiveness. Then, the mandrel 303 starts to supply high-pressure water and continues to push the plug 202 forward. In this process, the plug 202 drives the guide 204, the long condition 207, the ring stand 208, and the cartridge 206 to move forward together. When the plug 202 is pushed beyond the size matching range with the first sleeve 201, high-pressure water flows in the gap between the plug 202 and the first long tube 205, and the high-pressure water starts to enter the sealed cavity formed by the cartridge 206 and the first long tube 205 through the axial channel 218. At this time, the cartridge 206 is pushed to the sharpener 210 position and is broken, causing the water pressure in the sealed cavity to rise rapidly. This pressure water in turn squeezes the A and B two kinds of liquid in the cartridge 206 out, which immediately enters the spiral structure channel 211 for sufficient mixing and stirring. The uniformly mixed A and B liquid then passes through the third long tube 213, pushing the fourth long tube 214 to move forward to its top position. In this process, the fourth long tube 214 exactly closes the outlet 217 of the first fluid channel. Finally, the mixed liquid flows into the drill bit 106 through the lateral hole 219 on the fourth long tube 214.

[0051] Stirring the resin: The mandrel 303 in the drill sleeve 301 is retracted downward, and the drill sleeve 301 continues to rotate counterclockwise to drive the anchor rod to rotate, which fully stirs the resin anchoring agent.

[0052] Fastening the anchor rod: After the stirring is completed, the anchor rod has been fixed by the anchoring agent, and the drill sleeve 301 is rotated clockwise at this time. The second locking sleeve 102 moves away from the first locking sleeve 101, and the second locking sleeve 102 pushes the hemisphere pad 103 and the contact plate 104. The contact plate 104 contacts the roadway roof upward and applies a pre-tightening force to the roof, and the fastening anchor rod process is completed.

[0053] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and, while certain modifications are discussed, it is desired to be protected in accordance with the spirit and scope of the application. Therefore, the application is not limited to the specific embodiments shown and described, but only by the scope of the appended claims, unless otherwise specified.

Claims

1. A method for replacing the built-in resin of an anchor rod with high-pressure liquid, characterized in that: The outer cover of the medicine roll is sealed to the inner wall of the cavity containing the medicine roll, so that the lower part of the outer cover of the medicine roll is broken and the upper part of the outer cover separates the cavity into a displacement cavity and a liquid medicine channel. A fluid is introduced into one side of the displacement cavity, and the liquid medicine in the medicine roll is displaced by the extrusion of the fluid, and the liquid medicine flows out through the liquid medicine channel; The cavity for accommodating the medicine roll adopts the first cavity or the second cavity; A blocking member (202), a guide (204), a long condition (207) and a ring frame (208) are provided in the first cavity. The inner ring of the ring frame (208) is sealed with the outer skin of the medicine roll (206). The outer ring of the ring frame (208) is slidably sealed with the inner wall of the first cavity. The guide (204) is slidably matched with the inner wall of the first cavity. The guide (204) is connected to the blocking member (202). An axial channel (218) is opened on the guide (204). The long condition (207) is connected between the guide (204) and the ring frame (208). The outer skin of the medicine roll (206) is connected to the guide (204). A sealingly connected connecting sleeve (220), an elastic supporting sleeve (221), and a supporting sleeve (222) are provided in the second cavity. The inner hole of the connecting sleeve (220) is sealed in contact with the outer skin of the medicine roll (206). The outer wall of the connecting sleeve (220) is in sliding contact with the inner wall of the second cavity. The supporting sleeve (222) is sealed in contact with the inner wall of the second cavity.

2. An anchor rod, characterized in that: A method for replacing the resin embedded in an anchor rod using high-pressure liquid according to claim 1, comprising a rod body assembly (100) and a rod core assembly (200); The shaft assembly (100) includes a shaft (105) and a drill bit (106), one end of the shaft (105) is connected to the drill bit (106), and a water distribution channel of the drill bit (106) is communicated with the interior of the shaft (105); The rod core component (200) is loaded into the rod shaft (105); a first fluid channel is formed between the rod core component (200) and the rod shaft (105), and a second fluid channel is constructed in the rod core component (200); The inlet of the second fluid channel is used to connect with the core shaft of the drill box, and the outlet of the second fluid channel is connected to the water distribution channel of the drill bit (106); the second fluid channel is provided with a blocking member (202), a medicine roll (206), a sharp tool (210) and a stirring channel; The inlet (216) of the first fluid channel is located in the second fluid channel outside the blocking member (202); the outlet (217) of the first fluid channel and the outlet of the stirring channel are interconnected; a one-way sealing structure is provided in the second fluid channel; the one-way sealing structure closes the outlet of the stirring channel when the fluid in the first fluid channel flows toward the water distribution channel of the drill bit (106); and the one-way sealing structure closes the outlet (217) of the first fluid channel when the fluid in the stirring channel flows toward the water distribution channel of the drill bit (106); The second fluid channel includes a blocking member sealing section and a blocking member gap section. When the blocking member (202) is located in the blocking member sealing section, the second fluid channel is closed. When the blocking member (202) is located in the blocking member gap section, the fluid can flow into the second fluid channel through the blocking member (202); the medicine roll (206) is located between the blocking member (202) and the sharp object (210), and the outer skin of the medicine roll (206) close to the sharp object (210) is sealed and connected to the second fluid channel.

3. The anchor rod according to claim 2, characterized in that: The rod core assembly (200) includes a guide (204), a long condition (207) and a ring frame (208), the inner ring of the ring frame (208) is sealed with the outer skin of the medicine roll (206), the outer ring of the ring frame (208) is slidingly sealed with the second fluid channel, the guide (204) is slidingly matched with the second fluid channel, the guide (204) is connected to the blocking member (202), an axial channel (218) is opened on the guide (204), the long condition (207) is connected between the guide (204) and the ring frame (208), and the outer skin of the medicine roll (206) is connected to the guide (204).

4. The anchor rod according to claim 2, characterized in that: The rod core assembly (200) comprises a sealingly connected connecting sleeve (220), an elastic supporting sleeve (221) and a supporting sleeve (222); the inner hole of the connecting sleeve (220) is sealed in contact with the outer skin of the medicine roll (206); the outer wall of the connecting sleeve (220) is in sliding contact with the second fluid channel; and the supporting sleeve (222) is sealed in contact with the second fluid channel.

5. An anchor rod according to claim 3 or 4, characterized in that: The rod core assembly (200) comprises a first sleeve (201), a first long tube (205) and a second long tube (212); the first sleeve (201), the first long tube (205) and the second long tube (212) are connected in sequence; the inner diameter of the first long tube (205) is larger than the inner diameter of the first sleeve (201); the first sleeve (201) serves as a sealing section of the plugging member; the first long tube (205) serves as a gap section of the plugging member; the medicine roll (206) is located in the first long tube (205); and the spiral structure channel in the second long tube (212) serves as a stirring channel.

6. The anchor rod according to claim 5, characterized in that: The front section of the second long tube (212) is a stirring channel, and the rear section is inserted with a third long tube (213). A fourth long tube (214) is nested between the outlet end of the third long tube (213) and the second long tube (212). A sliding sealing section and a clearance fitting section exist between the fourth long tube (214) and the second long tube (212). The clearance fitting section is connected to the water distribution channel of the drill bit (106). The outlet (217) of the first fluid channel is located in the sliding sealing section between the second long tube (212) and the fourth long tube (214). The outlet end of the fourth long tube (214) is closed. A lateral hole (219) is opened on the tube wall of the fourth long tube (214). The lateral hole (219) is staggered with the outlet (217) of the first fluid channel.

7. The anchor rod according to claim 2, characterized in that: The shaft assembly (100) further comprises a plate (104), a hemispherical pad (103), a first locking sleeve (101) and a second locking sleeve (102); the first locking sleeve (101), the second locking sleeve (102), the hemispherical pad (103) and the plate (104) are sequentially sleeved on the shaft (105); the first locking sleeve (101) and the second locking sleeve (102) are screwed together with the shaft (105); the hemispherical pad (103) and the plate (104) can freely move along the length of the shaft (105).

8. The anchor rod according to claim 5, characterized in that: The spiral structure channel in the second long tube (212) is divided into multiple sections, including alternating left-handed sections and right-handed sections.

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