A mechanical drilling and cutting integrated drilling and grooving device and a grooving method

Abstract

The present application relates to the technical field of brake, in particular to a kind of mechanical drilling and cutting integrated drilling radial grooving device and grooving method, the device is composed of tunneling drill bit, reciprocating screw drill rod, reciprocating drill rod sleeve, high-strength alloy cutter, tunneling drill bit is connected with reciprocating screw drill rod by tail thread, reciprocating drill rod sleeve is cooperated with reciprocating screw drill rod thread groove by rotation, high-strength alloy cutter is fixed in reciprocating drill rod sleeve surface cutter groove;When drilling machine drills, reciprocating screw drill rod rotation drives reciprocating drill rod sleeve to reciprocate along the thread groove of drill rod surface, and high-strength alloy cutter fixed on sleeve cuts back and forth drilling hole wall, forms V-shaped groove;The drilling and grooving device of the present application has simple structure, and is easy to operate, and the grooving method realizes drilling and grooving integration, speed is fast, efficiency is high, improves the efficiency and stability of cutting groove, reduces the time and labor cost of cutting groove process.

Description

Technical Field

[0001] This invention relates to the field of drilling and grooving technology, specifically to a mechanical drilling and cutting integrated radial grooving device and grooving method. Background Technology

[0002] Currently, numerous scholars both domestically and internationally have conducted extensive research on borehole grooving. Research results indicate that, regardless of whether it is borehole blasting or hydraulic fracturing, a series of artificial radial grooves are typically chiseled inside the fracturing hole as weak surfaces for crack initiation. Borehole grooving can concentrate the explosive energy or water pressure inside the hole for crack propagation in the groove direction, thereby reducing the initiation pressure and promoting the radial initiation of hydraulic cracks. This effectively controls the development of crack propagation morphology between holes and significantly improves the performance of both methods.

[0003] Drilling and grooving technology has significant practical value and many advantages, but to date, a reliable, convenient, and low-cost grooving method has yet to be found. Existing drilling and grooving machines suffer from inconvenient transportation and cumbersome operation. Moreover, the cutting tools often use specially made diamond circular saw blades, which, although producing clear grooves and good grooving results, wear out quickly, leading to high construction costs and a tendency for the saw blade to jam. Therefore, their application and promotion in the mining industry are limited. On the other hand, existing grooving devices use impact grooving, which suffers from inconvenient operation, poor groove quality, and difficulty in removing the drill bit. Furthermore, they are prone to jamming during advancement and require repeated withdrawal, advancement, and replacement of the drill rod and drill bit during grooving, resulting in cumbersome construction and low work efficiency. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mechanical drilling and cutting integrated radial grooving device and grooving method, which solves the problems of easy jamming during propulsion, repeated withdrawal and restarting and replacement of drill bits and saw blades during grooving, and high construction costs due to large wear of the saw blade.

[0005] The objective of this invention is achieved as follows: a mechanical drilling and cutting integrated radial grooving device, comprising a tunneling drill bit, a reciprocating spiral drill rod, a reciprocating drill rod sleeve, and a high-strength alloy cutting tool;

[0006] The reciprocating spiral drill rod has a certain depth of reciprocating thread grooves on its surface. The reciprocating thread grooves are intersecting bidirectional threads. The reciprocating spiral drill rod has an axial hollow structure, which forms a water guide channel.

[0007] The main body of the reciprocating drill rod sleeve is a circular sleeve. The sleeve has protruding teeth at both axial ends, which mesh with the reciprocating thread groove, allowing the reciprocating drill rod sleeve to move axially on the reciprocating spiral drill rod.

[0008] The high-strength alloy cutting tool is mounted on the reciprocating drill rod sleeve, and the high-strength alloy cutting tool has a plurality of high-strength alloy cutting teeth arranged on it.

[0009] Preferably, the side of the high-strength alloy cutting tooth that is tangent to the hole wall is triangular.

[0010] Preferably, the protruding teeth inside the sleeve engage with the reciprocating thread groove, and the height of the protruding teeth is consistent with the depth of the reciprocating thread groove.

[0011] Preferably, the sleeve has a tool fixing groove formed by two rows of symmetrical protrusions on its side, and the high-strength alloy tool is snapped and fixed in the tool fixing groove.

[0012] Preferably, the high-strength alloy cutting tool is provided with a fixing rod on the side near the tool fixing groove. The fixing rod is provided with a through hole, and the tool fixing groove is provided with a through hole corresponding to the through hole on the fixing rod. The high-strength alloy cutting tool is fixedly connected by inserting a connecting block into the corresponding two through holes.

[0013] Preferably, the tunneling drill bit is threadedly connected to a reciprocating threaded drill rod via a tail thread, and the reciprocating threaded drill rod may be threadedly connected to a drill rod or a drilling rig.

[0014] Preferably, the tunneling drill bit is provided with a water guide hole, which is connected to the water guide channel in the hollow reciprocating auger drill rod.

[0015] A grooving method for a mechanical drilling and cutting integrated radial grooving device includes the following steps:

[0016] Step 1): Selectively connect the reciprocating spiral drill rod to the ordinary hollow drill rod according to the hole depth at the groove position. Thread the tail end of the ordinary hollow drill rod or the reciprocating spiral drill rod to the drilling rig. Connect the front end of the reciprocating spiral drill rod to the tunneling drill bit. Connect the hollow structure of the ordinary hollow drill rod or the hollow water guide of the reciprocating spiral drill rod to the high-pressure water pump.

[0017] Step 2): Adjust the position of the reciprocating drill rod sleeve on the reciprocating auger drill rod according to the length of the groove, start the drilling machine and push the drilling bit into the hole. At the same time, the rotation of the drilling machine drives the reciprocating auger drill rod to rotate. The reciprocating drill rod sleeve, which is meshed with the reciprocating auger drill rod, moves into the hole on the reciprocating auger drill rod. The high-strength alloy tool on the reciprocating drill rod sleeve grooves the hole wall.

[0018] Step 3): When the drilling bit reaches the deepest hole position of the groove, the drilling bit is no longer driven to dig into the hole. Instead, the reciprocating auger is rotated by the drilling rig, so that the reciprocating auger sleeve continues to advance into the hole and groove on the reciprocating auger. When the reciprocating auger sleeve advances to the front end of the reciprocating auger, the high-strength alloy tool on the reciprocating auger sleeve has also completed the groove work of the V-shaped groove.

[0019] Step 4): Keep the drilling rig driving only the reciprocating auger drill rod to rotate. The reciprocating drill rod sleeve that has reached the front end of the reciprocating auger drill rod will be forced to move backward by the limit of the reverse thread groove until it reaches the end of the thread groove of the reciprocating auger drill rod.

[0020] Step 5): Stop the drilling machine and remove the mechanical drilling and cutting integrated radial grooving device.

[0021] Preferably, in steps 2) and 3), the high-pressure water pump is started, and the high-pressure water flows out from the water guide hole of the drilling bit through the hollow water guide channel in the spiral drill rod or the hollow structure of the ordinary hollow drill rod, thereby washing the drilling bit and completing the grooving and dust removal.

[0022] The beneficial effects of this invention are:

[0023] 1. The grooving method of the present invention eliminates the need for repeated withdrawal and advance of the drill rod and replacement of the tunneling drill bit during the grooving process, realizing integrated construction of drilling and grooving processes, improving grooving efficiency and stability, and reducing the time and labor costs of the grooving process.

[0024] 2. The reciprocating thread groove used in this invention is bidirectional and cross-shaped. Compared with single thread, which requires stopping and restarting the drilling machine to reverse the rotation, bidirectional thread does not require changing the rotation direction of the drilling machine, which can reduce the number of processes and greatly improve the working efficiency of drilling and cutting integrated radial grooving.

[0025] 3. This invention features a series of high-strength alloy teeth arranged on a high-strength alloy cutting tool. Compared to a circular saw blade, the teeth are thicker, resulting in better wear resistance and lower construction costs. Furthermore, the triangular teeth with a certain thickness cut the hole wall to form a V-shaped groove. Compared to other groove shapes, the stress formed at the tip is more concentrated, and the energy required for the V-shaped groove crack to initiate is lower. This can relatively reduce the amount of explosives and increase the distance between holes, thereby reducing blasting vibration and the loosening zone, resulting in a better grooving effect.

[0026] 4. The grooving device of the present invention has the advantages of simple structure, convenient operation, fast speed, high efficiency, easy use and low cost, and has great promotion and application value. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the grooving device of the present invention;

[0028] Figure 2 This is a schematic diagram of the reciprocating spiral drill rod structure of the present invention;

[0029] Figure 3 for Figure 2 A sectional view;

[0030] Figure 4This is an exploded view of the connection between the reciprocating drill pipe sleeve and the high-strength alloy cutting tool of the present invention;

[0031] Figure 5 This is a schematic diagram of the tunneling drill bit structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the internal structure of the tunneling drill bit of the present invention;

[0033] Figure 7 This is a schematic diagram of the grooved result of the present invention;

[0034] Figure 8 This is a schematic diagram of the reciprocating threaded drill rod rotating to drive the cutting tool to cut the hole wall according to the present invention.

[0035] In the diagram: 1. Tunneling drill bit; 2. Reciprocating threaded drill rod; 3. Reciprocating drill rod sleeve; 4. High-strength alloy cutting tool; 5. Reciprocating threaded groove; 6. Water guide channel; 7. Convex tooth; 8. High-strength alloy cutting tooth; 9. Cutting tool fixing groove; 10. Fixing connecting rod; 11. Through hole; 12. Connecting block; 13. Water guide hole; 14. V-groove. Detailed Implementation

[0036] The present invention will now be further described with reference to the accompanying drawings.

[0037] Example 1

[0038] like Figure 1-7 As shown, a mechanical drilling and cutting integrated radial grooving device includes a tunneling drill bit 1, a reciprocating spiral drill rod 2, a reciprocating drill rod sleeve 3, and a high-strength alloy cutting tool 4. The surface of the reciprocating spiral drill rod 2 is machined with reciprocating threaded grooves 5 of a certain depth. The reciprocating spiral drill rod 2 has an axially hollow structure, which forms a water guide channel 6. The main body of the reciprocating drill rod sleeve 3 is a circular sleeve. The sleeve's internal axial ends are provided with protruding teeth 7 of a certain height. The protruding teeth 7 mesh with the reciprocating threaded grooves 5. Preferably, the protruding teeth 7 inside the sleeve and the reciprocating threaded grooves 5 are interlocked, and the height of the protruding teeth 7 is consistent with the depth of the reciprocating threaded grooves 5. When the reciprocating threaded grooves 5 rotate... The tooth 7 moves along the reciprocating thread groove 5, that is, when the reciprocating spiral drill rod 2 rotates, it can drive the reciprocating drill rod sleeve 3 to move axially on the reciprocating spiral drill rod 2. Since the reciprocating thread groove 5 of the present invention is bidirectional and cross-cutting, compared with the single thread which requires stopping the drill and restarting it to reverse the rotation, the bidirectional thread does not require changing the rotation direction of the drill, which can reduce the number of processes and greatly improve the working efficiency of drilling and cutting integrated drilling and radial grooving. The high-strength alloy tool 4 is installed on the reciprocating drill rod sleeve 3. The high-strength alloy tool 4 has a number of high-strength alloy cutting teeth 8 arranged on it. Compared with the circular saw blade, it is thicker, has better wear resistance, and lower construction cost.

[0039] Preferably, the side of the high-strength alloy cutting tooth 8 that is tangent to the hole wall is triangular. When the reciprocating threaded drill rod 2 rotates, it drives the high-strength alloy cutting tool 4 to move radially along the hole wall, so that the high-strength alloy cutting tooth 8 cuts the hole wall to form a V-shaped groove. The grooving tool carves a V-shaped groove 14 in the direction of the drilling line, artificially creating an initial crack in the drilling, so that the explosive energy or high-pressure water pressure is concentrated in the V-shaped groove. Compared with other groove shapes, the stress formed at the tip is more concentrated, so that the crack spreads and extends along the grooving direction, which can effectively reduce the crack initiation pressure of the drilling, and at the same time inhibit the development of cracks in non-grooving directions. In rock strata with developed cracks, the advantages of grooving are more obvious. Since the energy required for crack initiation in V-grooving is lower, the amount of explosive can be reduced and the distance between holes can be increased, reducing blasting vibration and the range of loosening zone, resulting in a better grooving effect.

[0040] Preferably, the tunneling drill bit 1 is threadedly connected to the reciprocating threaded drill rod 2 via a tail thread. The reciprocating threaded drill rod 2 can be threadedly connected to a drill rod or a drilling machine. The number of connected drill rods can be determined according to the hole depth at the groove position. The drill rod is a common hollow drill rod, and its internal hollow structure is connected to the water guide channel 6 of the reciprocating threaded drill rod 2. In addition, the tunneling drill bit 1 is provided with a water guide hole 13, which is also connected to the hollow water guide channel 6 of the reciprocating spiral drill rod 2. A high-pressure water pump can be connected to the end of the drill rod to allow high-pressure water to pass through the hollow structure and the water guide channel 6, and finally flow out from the water guide hole 13 to flush the tunneling drill bit 1 and avoid blockage in the hole affecting the drilling groove.

[0041] Example 2

[0042] like Figure 1-7As shown, a mechanical drilling and cutting integrated radial grooving device includes a tunneling drill bit 1, a reciprocating spiral drill rod 2, a reciprocating drill rod sleeve 3, and a high-strength alloy cutting tool 4. The surface of the reciprocating spiral drill rod 2 is machined with reciprocating threaded grooves 5 of a certain depth. The reciprocating spiral drill rod 2 has an axially hollow structure, which forms a water guide channel 6. The main body of the reciprocating drill rod sleeve 3 is a circular sleeve. The sleeve's internal axial ends are provided with protruding teeth 7 of a certain height. The protruding teeth 7 mesh with the reciprocating threaded grooves 5. Preferably, the protruding teeth 7 inside the sleeve and the reciprocating threaded grooves 5 are interlocked, and the height of the protruding teeth 7 is consistent with the depth of the reciprocating threaded grooves 5. When the reciprocating threaded grooves 5 rotate... The tooth 7 moves along the reciprocating thread groove 5, that is, when the reciprocating spiral drill rod 2 rotates, it can drive the reciprocating drill rod sleeve 3 to move axially on the reciprocating spiral drill rod 2. Since the reciprocating thread groove 5 of the present invention is bidirectional and cross-cutting, compared with the single thread which requires stopping the drill and restarting it to reverse the rotation, the bidirectional thread does not require changing the rotation direction of the drill, which can reduce the number of processes and greatly improve the working efficiency of drilling and cutting integrated drilling and radial grooving. The high-strength alloy tool 4 is installed on the reciprocating drill rod sleeve 3. The high-strength alloy tool 4 has a number of high-strength alloy cutting teeth 8 arranged on it. Compared with the circular saw blade, it is thicker, has better wear resistance, and lower construction cost.

[0043] Preferably, the side of the high-strength alloy cutting tooth 8 that is tangent to the hole wall is triangular. When the reciprocating threaded drill rod 2 rotates, it drives the high-strength alloy cutting tool 4 to move radially along the hole wall, so that the high-strength alloy cutting tooth 8 cuts the hole wall to form a V-shaped groove. The grooving tool carves a V-shaped groove 14 in the direction of the drilling line, artificially creating an initial crack in the drilling, so that the explosive energy or high-pressure water pressure is concentrated in the V-shaped groove. Compared with other groove shapes, the stress formed at the tip is more concentrated, so that the crack spreads and extends along the grooving direction, which can effectively reduce the crack initiation pressure of the drilling, and at the same time inhibit the development of cracks in non-grooving directions. In rock strata with developed cracks, the advantages of grooving are more obvious. Since the energy required for crack initiation in V-grooving is lower, the amount of explosive can be reduced and the distance between holes can be increased, reducing blasting vibration and the range of loosening zone, resulting in a better grooving effect.

[0044] To facilitate the replacement and installation of the high-strength alloy cutting tool 4, the side of the sleeve is machined with a cutting tool fixing groove 9 formed by two rows of symmetrical protrusions, and the high-strength alloy cutting tool 4 is snapped and fixed in the cutting tool fixing groove 9.

[0045] Specifically, a fixing rod 10 is provided on the side of the high-strength alloy cutting tool 4 near the cutting tool fixing groove 9. The fixing rod 10 is provided with a through hole 11. The cutting tool fixing groove 9 is provided with a through hole 11 corresponding to the through hole 11 on the fixing rod 10. The high-strength alloy cutting tool 4 is fixedly connected by inserting a connecting block 12 into the corresponding two through holes 11.

[0046] Preferably, the tunneling drill bit 1 is threadedly connected to the reciprocating threaded drill rod 2 via a tail thread. The reciprocating threaded drill rod 2 can be threadedly connected to a drill rod or a drilling machine. The number of connected drill rods can be determined according to the hole depth at the groove position. The drill rod is a common hollow drill rod, and its internal hollow structure is connected to the water guide channel 6 of the reciprocating threaded drill rod 2. In addition, the tunneling drill bit 1 is provided with a water guide hole 13, which is also connected to the hollow water guide channel 6 of the reciprocating spiral drill rod 2. A high-pressure water pump can be connected to the end of the drill rod to allow high-pressure water to pass through the hollow structure and the water guide channel 6, and finally flow out from the water guide hole 13 to flush the tunneling drill bit 1 and avoid blockage in the hole affecting the drilling groove.

[0047] Example 3

[0048] This embodiment provides a grooving method, such as Figure 1-8 As shown, a mechanical drilling and cutting integrated radial grooving device is included. The structure of this grooving device has been described in detail in Embodiment 1 and will not be repeated here. The specific grooving method includes the following steps:

[0049] Step 1): Selectively connect the reciprocating spiral drill rod 2 to the ordinary hollow drill rod according to the hole depth at the groove position. Thread the tail end of the ordinary hollow drill rod or the reciprocating spiral drill rod 2 to the drilling machine. Connect the front end of the reciprocating spiral drill rod 2 to the tunneling drill bit 1. Connect the hollow structure of the ordinary hollow drill rod or the hollow water guide channel 6 of the reciprocating spiral drill rod 2 to the high-pressure water pump.

[0050] Step 2): Adjust the position of the reciprocating drill sleeve 3 on the reciprocating spiral drill rod 2 according to the length of the groove, start the drilling machine and push the drilling bit 1 into the hole. At the same time, the rotation of the drilling machine drives the reciprocating spiral drill rod 2 to rotate. The reciprocating drill sleeve 3, which is meshed with the reciprocating spiral drill rod 2, moves into the hole on the reciprocating spiral drill rod 2. The high-strength alloy tool 4 on the reciprocating drill sleeve 3 grooves the hole wall.

[0051] Step 3): When the drilling bit 1 reaches the deepest hole position of the groove, the drilling bit 1 is no longer driven to dig into the hole. Instead, the reciprocating auger drill rod 2 is rotated by the drilling machine, so that the reciprocating drill rod sleeve 3 continues to advance into the hole and groove on the reciprocating auger drill rod 2. When the reciprocating drill rod sleeve 3 advances to the front end of the reciprocating auger drill rod 2, the high-strength alloy cutter 4 on the reciprocating drill rod sleeve 3 also completes the grooving work of the V-groove 14.

[0052] Step 4): Keep the drill rig driving only the reciprocating auger drill rod 2 to rotate. The reciprocating drill rod sleeve 3, which has reached the front end of the reciprocating auger drill rod 2, will be forced to move backward by the limit of the reverse thread groove until it reaches the end of the thread groove of the reciprocating auger drill rod 2.

[0053] Step 5): Stop the drilling rig and remove the mechanical drilling and cutting integrated radial grooving device.

[0054] Preferably, in steps 2) and 3), the high-pressure water pump is started, and the high-pressure water flows out from the water guide hole 13 of the tunneling drill bit 1 through the hollow water guide channel 6 in the spiral drill rod 2 or the hollow structure of the ordinary hollow drill rod, thereby washing the tunneling drill bit 1 and completing the grooving and dust removal.

[0055] This invention provides a mechanical integrated drilling and cutting radial grooving device and method, which enables the creation of radial grooves within the borehole during normal drilling and excavation without the need for repeated rod withdrawal and grooving device replacement. It combines drilling and grooving into one process, and allows for timely flushing of borehole sediment during integrated construction. Furthermore, the reciprocating thread grooves used in this invention are bidirectional and cross-cutting. Compared to single-thread reverse rotation, which requires stopping and restarting the drilling rig to reverse its direction, double-thread grooves do not require changing the drilling rig's rotation direction, reducing the number of steps, improving grooving efficiency and stability, and reducing the time and labor costs associated with the grooving process. The device is simple in structure, easy to operate, fast, efficient, and convenient to use. It employs several high-strength alloy cutting teeth, which are thicker than circular saw blades, resulting in better wear resistance and lower construction costs. This grooving device can be applied in mining operations such as coal mines or stone mines where rock splitters, expanding agents, explosives, and black powder are used to split rocks or coal bodies, demonstrating significant potential for widespread application.

[0056] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mechanical drilling and cutting integrated radial grooving device, characterized in that: Including tunneling drill bits, reciprocating auger drill rods, reciprocating drill rod sleeves, and high-strength alloy cutting tools; The reciprocating spiral drill rod has a certain depth of reciprocating thread grooves on its surface. The reciprocating thread grooves are intersecting bidirectional threads. The reciprocating spiral drill rod has an axial hollow structure, which forms a water guide channel. The main body of the reciprocating drill rod sleeve is a circular sleeve. The sleeve has protruding teeth at both axial ends, which mesh with the reciprocating thread groove, allowing the reciprocating drill rod sleeve to move axially on the reciprocating spiral drill rod. The high-strength alloy cutting tool is mounted on the reciprocating drill rod sleeve. The high-strength alloy cutting tool has several high-strength alloy cutting teeth arranged on it. The side of each high-strength alloy cutting tooth tangent to the hole wall is triangular. The protruding teeth inside the sleeve interlock with the reciprocating thread groove, and the height of the protruding teeth matches the depth of the reciprocating thread groove. The side of the sleeve is machined with a cutting tool fixing groove formed by two rows of symmetrical protrusions. The high-strength alloy cutting tool is snapped and fixed within the cutting tool fixing groove. A fixing connecting rod is provided on the side of the high-strength alloy cutting tool near the cutting tool fixing groove. The fixing connecting rod has a through hole, and the cutting tool fixing groove has a through hole corresponding to the through hole on the fixing connecting rod. A connecting block is inserted into the corresponding two through holes and fixedly connected to the high-strength alloy cutting tool. The tunneling drill bit is threadedly connected to the reciprocating threaded drill rod via a tail thread. The reciprocating threaded drill rod can be threadedly connected to a drill rod or drilling rig. The tunneling drill bit is provided with a water guide hole, which communicates with the hollow water guide channel in the reciprocating spiral drill rod.

2. A grooving method, characterized in that: The device includes a mechanical drilling and cutting integrated radial grooving device as described in claim 1, and includes the following steps; Step 1): Selectively connect the reciprocating spiral drill rod to the ordinary hollow drill rod according to the hole depth at the groove position. Thread the tail end of the ordinary hollow drill rod or the reciprocating spiral drill rod to the drilling rig. Connect the front end of the reciprocating spiral drill rod to the tunneling drill bit. Connect the hollow structure of the ordinary hollow drill rod or the hollow water guide of the reciprocating spiral drill rod to the high-pressure water pump. Step 2): Adjust the position of the reciprocating drill rod sleeve on the reciprocating auger drill rod according to the length of the groove, start the drilling machine and push the drilling bit into the hole. At the same time, the rotation of the drilling machine drives the reciprocating auger drill rod to rotate. The reciprocating drill rod sleeve, which is meshed with the reciprocating auger drill rod, moves into the hole on the reciprocating auger drill rod. The high-strength alloy tool on the reciprocating drill rod sleeve grooves the hole wall. Step 3): When the drilling bit reaches the deepest hole position of the groove, the drilling bit is no longer driven to dig into the hole. Instead, the reciprocating auger is rotated by the drilling rig, so that the reciprocating auger sleeve continues to advance into the hole and groove on the reciprocating auger. When the reciprocating auger sleeve advances to the front end of the reciprocating auger, the high-strength alloy tool on the reciprocating auger sleeve has also completed the groove work of the V-shaped groove. Step 4): Keep the drilling rig driving only the reciprocating auger drill rod to rotate. The reciprocating drill rod sleeve that has reached the front end of the reciprocating auger drill rod will be forced to move backward by the limit of the reverse thread groove until it reaches the end of the thread groove of the reciprocating auger drill rod. Step 5): Stop the drilling machine and remove the mechanical drilling and cutting integrated radial grooving device.

3. The grooving method according to claim 2, characterized in that: In steps 2) and 3), the high-pressure water pump is started. The high-pressure water flows through the hollow water channel in the spiral drill rod or the hollow structure of the ordinary hollow drill rod, and finally flows out from the water guide hole of the tunneling drill bit, thereby washing the tunneling drill bit and completing the grooving and dust removal.

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