Anchor rod recovery method

Abstract

The present invention discloses an anchor rod recovery method, which adopts an anchor rod recovery device, wherein the anchor rod recovery device comprises an anchor rod recovery device body, the outer surface of one end of the anchor rod recovery device body is provided with a large diameter thin-walled drill spiral drill rod, the outer surface of one side of the large diameter thin-walled drill spiral drill rod is provided with a coring drill bit, the interior of the large diameter thin-walled drill spiral drill rod is provided with a core claw, and the outer surface of the other end of the anchor rod recovery device body is provided with a joint, the coring drill bit comprises a drill body, a cemented carbide cutter head and a wear-resistant ring, the cemented carbide cutter head is located on the outer surface of one end of the drill body, and the wear-resistant ring is located in the middle of the drill body. The anchor rod recovery method described in the present invention solves the problem of anchor rod recovery, provides a basic guarantee for the safe and efficient recovery work, reduces the labor intensity of miners, improves efficiency, and ensures the safety of employees. This equipment is not only simple in structure, but also easy to operate, bringing better prospects for use.

Description

Technical Field

[0001] The invention relates to the technical field of anchor rod recovery devices used in underground coal mine anchor rod drilling vehicles, and in particular to an anchor rod recovery method. Background Art

[0002] The support technology used in mine tunnels generally requires the use of spiral anchors as reinforcement materials. However, coal mines often carry out mining in tunnels during production, and the anchors used for reinforcement are difficult to remove, which can easily cause accidents:

[0003] 1. The remaining reinforcement bolts will damage the coal cutter cutter. At the same time, the sparks generated by the collision between the bolts and the coal cutter cutter will easily cause a gas explosion if they encounter the locally accumulated gas, which will bring serious safety hazards to underground production.

[0004] 2. If the anchor rods entering the coal flow system cannot be removed in time, it may cause accidents to the transport machinery, and may even cause the serious consequence of tearing the belt of the belt conveyor. In the production process, the anchor rods of the coal flow system are often removed by stopping the scraper conveyor, which will reduce the operating rate of the working face equipment. At the same time, the anchor rods wrapped around the coal machine drum also require manpower and time to remove the anchor rods. This method of handling anchor rods seriously affects the production of the working face.

[0005] At present, during the mining process of the fully mechanized mining face, the general process for removing the anchor rod when the end (tail) of the coal mining machine is wrong is: when the coal mining machine makes a mistake, the coal body in the triangular area is loosened, and then the anchor rod is removed. However, this method is backward and difficult to master. It has major safety hazards, and safety accidents and electromechanical accidents occur frequently. Summary of the invention

[0006] The main purpose of the present invention is to provide a method for recovering an anchor rod, which can effectively solve the problems in the background technology.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A method for recovering an anchor rod adopts an anchor rod recovery device, wherein the anchor rod recovery device comprises an anchor rod recovery device body, a large diameter thin-walled drill spiral drill rod is arranged on the outer surface of one end of the anchor rod recovery device body, a coring drill bit is arranged on the outer surface of one side of the large diameter thin-walled drill spiral drill rod, a core claw is arranged on the outer surface of one side of the large diameter thin-walled drill spiral drill rod, and a joint is arranged on the outer surface of the other end of the anchor rod recovery device body.

[0009] Preferably, the coring drill bit comprises a drill body, a cemented carbide cutter head and a wear-resistant ring, wherein the cemented carbide cutter head is located on the outer surface of one end of the drill body, and the wear-resistant ring is located in the middle of the drill body.

[0010] Preferably, a fixing assembly is provided between the drill body and the cemented carbide cutter head, an outer surface of one end of the drill body is fixedly connected to an outer surface of one end of the cemented carbide cutter head via the fixing assembly, and the drill body is fixedly connected to a wear-resistant ring.

[0011] Preferably, the large-diameter thin-walled drill spiral drill rod comprises a high-strength geological pipe alloy pipe and a wear-resistant spiral steel strip, and the wear-resistant spiral steel strip is located on the outer wall of the high-strength geological pipe alloy pipe.

[0012] Preferably, the wear-resistant spiral strip steel is processed on the outer wall of the high-strength geological pipe alloy pipe by mechanical equipment.

[0013] Preferably, the core claw comprises a clamping block, a stopper, a spring and a pin, the stopper is located on the upper outer surface of the clamping block, the spring is located on the front outer surface of the stopper, and the pin is located on the front outer surface of the clamping block.

[0014] Preferably, the anchor rod recovery method comprises the following steps:

[0015] The core claw is connected to the anchor rod through a thread, the coring drill bit is put on the core claw, connected to the rotator through a joint, and the rotator is started. The appropriate rotation speed and thrust are selected according to the actual situation. The coring drill bit is in the form of a bell mouth, so the core claw will keep the anchor rod in the large-diameter thin-walled drill spiral drill rod. The coring drill bit enters the roof and moves forward. The anchor rod and the core claw will move backward relative to each other to the barb position. The core claw is stuck in the drill rod under the action of the spring. The rotator retracts until the coring drill bit is completely out of the coal seam and then stops rotating and retracting. The entire set of anchor withdrawal drill tools is manually pulled out of the rotator and the anchor rod is taken out.

[0016] Preferably, the clamping block is fixedly connected to the stopper, the stopper is detachably connected to the spring, and the clamping block is fixedly connected to the pin shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the core claw is connected to the anchor rod through a thread, the coring drill bit is sleeved on the core claw, connected to the rotator through a joint, the rotator is started, and a suitable rotation speed and propulsion force are selected according to actual conditions. The coring drill bit is in a bell-mouth form, so the core claw will keep the anchor rod in the large-diameter thin-walled drill spiral drill rod, the coring drill bit enters the roof and moves forward, the anchor rod and the core claw will move backward relative to each other to the barb position, the core claw is stuck in the drill rod under the action of the spring, the rotator retracts until the coring drill bit is completely out of the coal seam and then stops rotating and retracting, the entire set of anchor withdrawal drill tool is manually pulled out of the rotator, and the anchor rod is removed Compared with manual recovery of anchor rods, which has high labor intensity, high risk factor and low efficiency, this structure does not need to consider the influence of anchoring force and rod strength on recovery, and has high reliability; it does not damage the surrounding rock of the tunnel and has strong safety; it does not damage the original cross-section and strength of the rod body and has a high reuse rate; it is easy to operate and has a fast recovery speed. The inner diameter of the hollow drill rod is larger than the anchor rod; it is convenient to drill the anchor rod, and the wear-resistant ring structure prolongs the service life of the device; the trumpet shape ensures that the anchor rod does not fall out when retreating; the spiral drill rod structure can discharge coal powder when drilling in. The entire anchor rod recovery method has a simple structure, is easy to operate, and has a better effect than the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an anchor rod recovery method of the present invention;

[0019] Figure 2 The present invention is a method for recovering anchor rods Figure 1 A schematic structural diagram of a core drill bit 2;

[0020] Figure 3 The present invention is a method for recovering anchor rods Figure 1 A schematic diagram of the structure of a medium to large diameter thin-walled drill spiral drill rod 3;

[0021] Figure 4 The present invention is a method for recovering anchor rods Figure 1 Schematic diagram of the structure of the middle core claw 4.

[0022] In the figure: 1. Anchor recovery device body; 2. Coring drill bit; 3. Large diameter thin-walled drill spiral drill rod; 4. Core claw; 5. Joint; 201. Drill bit body; 202. Carbide cutter head; 203. Wear-resistant ring; 301. High-strength geological pipe alloy pipe; 302. Wear-resistant spiral strip steel; 401. Clamping block; 402. Stop block; 403. Spring; 404. Pin shaft. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1:

[0027] like Figure 1-4 As shown, an anchor rod recovery method adopts an anchor rod recovery device, which includes an anchor rod recovery device body 1, a large diameter thin-walled drill spiral drill rod 3 is arranged on the outer surface of one end of the anchor rod recovery device body 1, a coring drill bit 2 is arranged on the outer surface of one side of the large diameter thin-walled drill spiral drill rod 3, a core claw 4 is arranged on the outer surface of one side of the large diameter thin-walled drill spiral drill rod 3, and a joint 5 is arranged on the outer surface of the other end of the anchor rod recovery device body 1. Embodiment 2:

[0028] On the basis of the first embodiment, Figure 2 As shown, a fixing component is provided between the drill body 201 and the carbide cutter head 202, and the outer surface of one end of the drill body 201 is fixedly connected to the outer surface of one end of the carbide cutter head 202 through the fixing component. The drill body 201 is fixedly connected to the wear-resistant ring 203, and the wear-resistant ring 203 does not damage the original cross-section and strength of the rod body, and has a high reuse rate. Embodiment three:

[0029] On the basis of the first and second embodiments, Figure 3 As shown, the wear-resistant spiral strip steel 302 is processed on the outer wall of the high-strength geological pipe alloy pipe 301 by mechanical equipment, and the high-strength geological pipe alloy pipe 301 can improve the service life of the overall structure. Embodiment 4:

[0030] On the basis of the first, second and third embodiments, Figure 4 As shown, the clamping block 401 is fixedly connected to the stopper 402, the stopper 402 is detachably connected to the spring 403, the clamping block 401 is fixedly connected to the pin 404, and the spring 403 makes the overall structure easy to operate and improves the rod recovery speed.

[0031] The present invention discloses an anchor rod recovery method, wherein a core claw 4 is connected to the anchor rod through a thread, a coring drill bit 2 is sleeved on the core claw 4, and connected to a rotator through a joint 5, the rotator is started, and a suitable rotation speed and propulsion force are selected according to actual conditions. The coring drill bit 2 is in a bell-mouth form, so the core claw 4 will keep the anchor rod in a large-diameter thin-walled drill spiral drill rod 3, the coring drill bit 2 enters the roof and moves forward, the anchor rod and the core claw 4 will move backward relative to each other to a barbed position, the core claw 4 is stuck in the drill rod under the action of a spring 403, the rotator is retracted until the coring drill bit 2 is completely out of the coal seam, and then the rotator stops rotating and retracts, and the anchor rod is manually The whole set of anchor withdrawal drilling tools is pulled out from the rotator, and the anchor rod is taken out. Compared with manual anchor rod recovery, the labor intensity is high, the risk factor is high, and the efficiency is low. This structure does not need to consider the influence of anchoring force and rod strength on recovery, and has high reliability; it does not damage the surrounding rock of the tunnel and has strong safety; it does not damage the original cross-section and strength of the rod body and has a high reuse rate; it is easy to operate and has a fast recovery speed. The inner diameter of the hollow drill rod is larger than the anchor rod; it is convenient to drill the anchor rod, and the wear-resistant ring 203 structure prolongs the service life of the device; the bell-mouth form ensures that the anchor rod does not fall out during withdrawal; the spiral drill rod structure can discharge coal powder during drilling, which is more practical.

[0032] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An anchor rod recovery method, using an anchor rod recovery device, the anchor rod recovery device comprising an anchor rod recovery device body (1), characterized in that: A large-diameter thin-walled auger rod (3) is provided on the outer surface of one end of the anchor rod recovery device body (1); a coring drill bit (2) is provided on the outer surface of one side of the large-diameter thin-walled auger rod (3); a core claw (4) is provided inside the large-diameter thin-walled auger rod (3); and a joint (5) is provided on the outer surface of the other end of the anchor rod recovery device body (1); The coring drill bit (2) comprises a drill bit body (201), a cemented carbide cutter head (202) and a wear-resistant ring (203), wherein the cemented carbide cutter head (202) is located on the outer surface of one end of the drill bit body (201), and the wear-resistant ring (203) is located in the middle of the drill bit body (201); A fixing assembly is provided between the drill body (201) and the cemented carbide cutter head (202); an outer surface of one end of the drill body (201) is fixedly connected to an outer surface of one end of the cemented carbide cutter head (202) via the fixing assembly; and the drill body (201) is fixedly connected to a wear-resistant ring (203); The large-diameter thin-walled spiral drill rod (3) comprises a high-strength geological pipe alloy pipe (301) and a wear-resistant spiral steel strip (302), wherein the wear-resistant spiral steel strip (302) is located on the outer wall of the high-strength geological pipe alloy pipe (301); The wear-resistant spiral strip steel (302) is processed on the outer wall of the high-strength geological pipe alloy pipe (301) by mechanical equipment; The core claw (4) comprises a clamping block (401), a stopper (402), a spring (403) and a pin (404), wherein the stopper (402) is located on the outer surface of the upper end of the clamping block (401), the spring (403) is located on the outer surface of the front end of the stopper (402), and the pin (404) is located on the outer surface of the front end of the clamping block (401); The anchor rod recovery method comprises the following steps: The core claw (4) is connected to the anchor rod through a thread, the coring drill bit (2) is sleeved on the core claw (4), and connected to the rotator through a joint (5), and the rotator is started. The appropriate rotation speed and thrust are selected according to the actual situation. The coring drill bit (2) is in the form of a bell mouth, so the core claw (4) will keep the anchor rod in the large-diameter thin-walled drill spiral drill rod (3). The coring drill bit (2) enters the roof and moves forward. The anchor rod and the core claw (4) will move backward relative to each other to the barbed position. The core claw (4) is stuck in the drill rod under the action of the spring (403). The rotator is retracted until the coring drill bit (2) is completely out of the coal seam and then stops rotating and retracting. The entire set of anchor withdrawal drilling tools is manually pulled out from the rotator, and the anchor rod is taken out.

2. The anchor rod recovery method according to claim 1, characterized in that: The clamping block (401) is fixedly connected to the stopper (402), the stopper (402) is detachably connected to the spring (403), and the clamping block (401) is fixedly connected to the pin shaft (404).

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