A ground drilling device and drilling method for underground grouting and filling of a coal mine

Abstract

The present application relates to the technical fields of coal mine grouting drilling, in particular to a ground drilling device for coal mine underground grouting filling, which comprises a caterpillar drive base, a lifting seat is installed on the top of the caterpillar drive base through a height adjusting push rod, a rotating table is rotatably installed on the lifting seat, an auxiliary fixing device for auxiliary support is arranged on the side of the rotating table, and a guide bearing track for supporting the rotating table is fixedly installed on the lifting seat. The drilling device can be fixed to the ground with the rotating table, the auxiliary fixing device and the jacking push rod, and the rotating table is prevented from rotating during work. The pointing position of the drill rod can be accurately adjusted by the auxiliary adjusting device and the inclination adjusting device, and the drilling device has better support stability, which can effectively reduce the vibration of the drill rod caused by unstable equipment support, thereby improving the drilling efficiency and the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of coal mine grouting drilling technology, specifically to a ground drilling device and drilling method for underground grouting and filling in coal mines. Background Technology

[0002] After coal mining, goaf areas are formed underground. Due to insufficient support strength, these goaf areas are prone to collapse, causing surface subsidence and posing serious damage to buildings and other facilities in the area. Therefore, grouting is necessary to improve the stress conditions within these goaf areas. However, since some goaf areas are directly beneath building complexes, and the grouting equipment requires a large construction site, it is not feasible to carry out the work directly within the building complexes. Therefore, drilling inclined holes from the surrounding area into the goaf can be used. However, the equipment currently used for inclined hole drilling has poor support performance, resulting in significant drill rod vibration during drilling, which reduces drilling efficiency. Furthermore, equipment positioning is cumbersome, making it difficult to ensure that the hole reaches the correct angle within the goaf area.

[0003] If a new type of drilling equipment with precise positioning, good support performance, and stable operation is invented, such problems can be effectively solved. Therefore, we provide a ground drilling device and drilling method for underground grouting and filling in coal mines. Summary of the Invention

[0004] The purpose of this invention is to provide a ground drilling device and drilling method for underground grouting and filling in coal mines, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a ground drilling device for underground grouting and filling in coal mines, comprising a tracked drive base, a lifting seat mounted on the top of the tracked drive base via a height adjustment push rod, and a rotating platform rotatably mounted on the lifting seat, an auxiliary fixing device for auxiliary support provided on the side of the rotating platform, a guide bearing rail for supporting the rotating platform fixedly mounted on the lifting seat, and a bearing plate mounted on the rotating seat via an auxiliary adjustment device capable of adjusting the forward, backward, left, and right movement distances;

[0006] Above the support plate is a drilling drive device and an inclination adjustment device for adjusting the direction of the drilling device. The drilling drive device includes a rotating guide seat that rotates with the support plate and is used to slide the drill rod. The inclination adjustment device includes a guide plate that is fixedly installed with the rotating guide seat. A moving platform is slidably installed on the guide plate via a guide rail. A rotating connecting sleeve that drives the drill rod to rotate is driven by a main motor on the moving platform. The moving platform and the rotating guide seat are connected by a feed adjustment push rod. A control console is fixedly installed on the rotating platform. The control console is electrically connected to the track drive base, the feed adjustment push rod, and the height adjustment push rod, respectively.

[0007] Preferably, a direction adjustment gear ring is fixedly installed at the bottom of the rotating platform, and a direction adjustment motor is fixedly installed below the lifting seat. The output end of the direction adjustment motor drives a direction adjustment gear that meshes with the direction adjustment gear ring, and the direction adjustment motor is electrically connected to the control console.

[0008] Preferably, a lifting push rod is fixedly installed on the lifting seat, and the output end of the lifting push rod drives a lifting plate. The lifting plate has a toothed groove, and a toothed mating groove that engages with the toothed groove on the lifting plate is provided on the rotating table.

[0009] Preferably, the auxiliary adjustment device includes a first movable plate slidably mounted on a guide rail on the rotating platform, and the first movable plate is connected to the rotating platform via a first fine-tuning push rod. A second movable plate is slidably mounted on the first movable plate via a guide rail, and the second movable plate is connected to the first movable plate via a second fine-tuning push rod. The upper end of the second movable plate is fixedly mounted to a support plate, and both the first and second fine-tuning push rods are electrically connected to the control console.

[0010] Preferably, a toolbox is fixedly installed on the side of the rotating table, and a support platform is fixedly installed below the control console to facilitate the operator's standing.

[0011] Preferably, a main gear ring is fixedly installed on the rotating connecting sleeve, the output end of the main motor drives a main gear that meshes with the main gear ring, and an angle adjustment gear ring is fixedly installed on the rotating shaft of the rotating guide seat. An angle adjustment motor is fixedly installed on the bearing plate, the output end of the angle adjustment motor drives an angle adjustment gear that meshes with the angle adjustment gear ring, and the angle adjustment motor is electrically connected to the controller.

[0012] Preferably, the guide plate is hinged with a first adjusting push rod and a second adjusting push rod from top to bottom, and the output ends of the first adjusting push rod and the second adjusting push rod are both hinged with connectors. The connectors are snapped into the docking seats located on the bearing plate, and the first adjusting push rod and the second adjusting push rod are both electrically connected to the control console.

[0013] Preferably, a guide sleeve for guiding the movement direction of the drill rod is fixedly installed on the guide plate, and a shock-absorbing rubber sleeve is fixedly installed at the contact point between the guide sleeve and the drill rod.

[0014] Preferably, the auxiliary fixing device includes a connecting seat, and a distance adjustment push rod is fixedly installed on the connecting seat. The output end of the distance adjustment push rod is fixedly installed with the rotating table. A lifting push rod is fixedly installed on the connecting seat, and the output end of the lifting push rod drives a support plate for pressing against the ground. An insertion plate for inserting into the soil is fixedly installed below the support plate, and a fixing pile for inserting into the soil is slidably installed on the side of the support plate. The fixing pile has positioning holes arranged in an equidistant array, and a positioning screw that mates with the positioning holes to fix the fixing pile is screwed onto the connecting seat.

[0015] An operating method for drilling a surface drilling device for underground grouting and filling in coal mines includes the following steps:

[0016] S1. Initial Fixing: First, transport the device to the construction site by an external transport vehicle. Then, use the track drive on the track drive base to drive the device to the vicinity of the work position where the marking line has been drawn in advance and roughly adjust the position of the track drive base. Then, stop the track drive base and rotate the turntable to a position aligned with the drilling direction. Finally, fix the turntable to the ground using an auxiliary fixing device.

[0017] S2. Direction adjustment: Use the tilt adjustment device to raise the drilling drive device to the specified tilt angle, and then use the auxiliary adjustment device to fine-tune the position of the rotating connecting sleeve so that the rotating connecting sleeve can be strictly aligned with the drilling position and drilling direction.

[0018] S3. Drilling: Install the drill rod at the end of the rotating connecting sleeve and install the drill bit on the drill rod. Then, use the main motor to drive the rotating connecting sleeve to rotate the drill rod. Use the feed adjustment push rod to control the rotation speed. After the drill rod has finished advancing, disconnect the connection between the drill rod and the rotating connecting sleeve and connect a new drill rod. Then repeat the work until the drilling operation is completed.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The drilling device designed in this invention can use a rotating table in conjunction with an auxiliary fixing device and a lifting push rod to better fix it to the ground and prevent the rotating table from rotating during operation. Then, the auxiliary adjustment device and the tilt adjustment device are used to accurately adjust the pointing position of the drill rod. At the same time, it has better support stability, which can effectively reduce the vibration of the drill rod caused by unstable equipment support, thereby improving drilling efficiency and equipment service life, and has high application value. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a side view of the structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the installation of the tilt adjustment device and the drilling drive device of the present invention;

[0023] Figure 4 This is a schematic diagram of the installation of the track drive base and auxiliary adjustment device of the present invention;

[0024] Figure 5 This is a cross-sectional view showing the installation of the auxiliary adjustment device and the lifting seat of the present invention;

[0025] Figure 6 This is a cross-sectional view of the lifting seat of the present invention;

[0026] Figure 7 This is a schematic diagram of the auxiliary fixing device of the present invention.

[0027] In the diagram: 1. Track drive base; 2. Auxiliary fixing device; 201. Distance adjustment push rod; 202. Connecting seat; 203. Lifting push rod; 204. Insertion plate; 205. Support plate; 206. Fixing pile; 207. Positioning hole; 208. Positioning screw; 3. Tilt adjustment device; 301. Guide plate; 302. First adjustment push rod; 303. Second adjustment push rod; 304. Connector; 4. Drilling drive device; 401. Main motor; 402. Main gear; 403. Main gear ring; 404. Rotating connecting sleeve; 405. Guide sleeve; 406. Feed adjustment push rod; 407. 408. Rotating guide seat; 5. Moving table; 6. Bearing plate; 7. Auxiliary adjustment device; 8. Second moving plate; 9. Second fine-tuning push rod; 10. First moving plate; 11. First fine-tuning push rod; 12. Toolbox; 13. Control console; 14. Direction adjustment gear; 15. Docking seat; 16. Direction adjustment motor; 17. Tilt adjustment gear; 18. Tilt adjustment motor; 19. Direction adjustment gear; 20. Lifting push rod; 21. Lifting plate; 22. Height adjustment push rod; 33. Lifting seat; 44. Guide bearing rail; 5. Drill rod; 65. Rotating table. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the technical solutions of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1 to 7 The present invention provides a technical solution:

[0030] A ground drilling device for underground grouting and filling in coal mines includes a tracked drive base 1. A lifting seat 19 is installed on the top of the tracked drive base 1 via a height adjustment push rod 18, and a rotating platform 22 is rotatably installed on the lifting seat 19. An auxiliary fixing device 2 for auxiliary support is provided on the side of the rotating platform 22. A guide bearing rail 20 for supporting the rotating platform 22 is fixedly installed on the lifting seat 19. A bearing plate 5 is installed on the rotating platform 22 via an auxiliary adjustment device 6 that can adjust the forward, backward, left and right movement distance. The height adjustment push rod 18 is used to lift the lifting seat 19 upward when the tracked drive base 1 needs to go uphill or downhill, thereby avoiding other parts from getting stuck with the external ground when going uphill or downhill due to the lifting seat 19 being too low. When the equipment is in operation, the height adjustment push rod 18 will pull the lifting seat 19 downward, thereby lowering the overall center of gravity of the equipment and effectively improving the stability of the equipment.

[0031] Please see Figures 1 to 3 Above the support plate 5, there is a drilling drive device 4 and an inclination adjustment device 3 for adjusting the direction of the drilling device 4. The drilling drive device 4 includes a rotating guide seat 407 that rotates with the support plate 5 and is used to slide the drill rod 21. The inclination adjustment device 3 includes a guide plate 301 that is fixedly installed with the rotating guide seat 407. A moving platform 408 is slidably installed on the guide plate 301 via a guide rail. The moving platform 408 is driven by a main motor 401 to drive a rotating connecting sleeve 404 that drives the drill rod 21 to rotate. The moving platform 408 and the rotating guide seat 407 are connected by a feed adjustment push rod 406. A control console 8 is fixedly installed on the rotating platform 22. The control console 8 is electrically connected to the track drive base 1, the feed adjustment push rod 406 and the height adjustment push rod 18 respectively. A toolbox 7 is fixedly installed on the side of the rotating platform 22. A support platform for the operator to stand on is fixedly installed below the control console 8.

[0032] Please see Figure 6 and Figure 7 A directional adjustment gear ring 15 is fixedly installed at the bottom of the rotating table 22, and a directional adjustment motor 11 is fixedly installed below the lifting seat 19. The output end of the directional adjustment motor 11 drives a directional adjustment gear 9 that meshes with the directional adjustment gear ring 15. The directional adjustment motor 11 is electrically connected to the control console 8. A lifting push rod 16 is fixedly installed on the lifting seat 19, and the output end of the lifting push rod 16 drives a lifting plate 17. A toothed groove is provided on the lifting plate 17, and a toothed mating groove is provided on the rotating table 22 that engages with the toothed groove on the lifting plate 17.

[0033] Please see Figure 6 and Figure 7The auxiliary adjustment device 6 includes a first movable plate 603 slidably mounted on a guide rail on a rotating table 22, and the first movable plate 603 is connected to the rotating table 22 via a first fine-tuning push rod 604. A second movable plate 601 is slidably mounted on the first movable plate 603 via a guide rail, and the second movable plate 601 is connected to the first movable plate 603 via a second fine-tuning push rod 602. The upper end of the second movable plate 601 is fixedly mounted to the bearing plate 5. Both the first fine-tuning push rod 604 and the second fine-tuning push rod 602 are electrically connected to the control console 8. Both the first fine-tuning push rod 604 and the second fine-tuning push rod 602 are single-rod double-acting hydraulic push rods. Both the first movable plate 603 and the second movable plate 601 are equipped with grating ruler sensors at their movement positions to cooperate with the first fine-tuning push rod 604 and the second fine-tuning push rod 602 to achieve more precise fine-tuning distance control.

[0034] Please see Figures 1 to 3 A main gear ring 403 is fixedly installed on the rotating connecting sleeve 404. The output end of the main motor 401 drives a main gear 402 that meshes with the main gear ring 403. An angle adjustment gear ring 12 is fixedly installed on the rotating shaft of the rotating guide seat 407. An angle adjustment motor 14 is fixedly installed on the bearing plate 5. The output end of the angle adjustment motor 14 drives an angle adjustment gear 13 that meshes with the angle adjustment gear ring 12. The angle adjustment motor 14 is electrically connected to the controller 8. A guide sleeve 405 for guiding the movement direction of the drill rod 21 is fixedly installed on the guide plate 301. A shock-absorbing rubber sleeve is fixedly installed at the contact point between the guide sleeve 405 and the drill rod 21. The front end of the bearing plate 5 is also provided with a support frame that can directly support the bottom of the rotating guide seat 407 when the guide plate 301 is vertically downward, thereby effectively preventing the drilling drive device 4 from tilting forward directly.

[0035] Please see Figures 1 to 3 The guide plate 301 is hinged from top to bottom with a first adjusting push rod 302 and a second adjusting push rod 303. The output ends of the first adjusting push rod 302 and the second adjusting push rod 303 are hinged with connectors 304. The connectors 304 are connected to the docking seat 10 located on the bearing plate 5 by plug-in pins. The first adjusting push rod 302 and the second adjusting push rod 303 are electrically connected to the control console 8. The first adjusting push rod 302 and the second adjusting push rod 303 are both single-rod double-acting hydraulic push rods.

[0036] Please see Figure 1 and Figure 7The auxiliary fixing device 2 includes a connecting seat 202, and a distance adjustment push rod 201 is fixedly installed on the connecting seat 202. The output end of the distance adjustment push rod 201 is fixedly installed with the rotating table 22. A lifting push rod 203 is fixedly installed on the connecting seat 202, and the output end of the lifting push rod 203 drives a support plate 205 for pressing on the ground. An insertion plate 204 for inserting into the soil is fixedly installed below the support plate 205, and a fixing pile 206 for inserting into the soil is slidably installed on the side of the support plate 205. The fixing pile 206 has positioning holes 207 arranged in an equidistant array, and a positioning screw 208 that cooperates with the positioning holes 207 to fix the fixing pile 206 is screwed onto the connecting seat 202.

[0037] An operating method for drilling a surface drilling device for underground grouting and filling in coal mines includes the following steps:

[0038] S1. Initial Fixing: First, the device is transported to the construction site by an external transport vehicle. Then, the device is driven by the track on the track drive base 1 to the vicinity of the pre-marked working position and the position of the track drive base 1 is roughly adjusted. Then, the track drive base 1 stops working, and the rotating table 22 is driven by the direction adjustment motor 11 to rotate to a position aligned with the drilling direction. Then, the rotating table 22 is fixed to the ground by the auxiliary fixing device 2. The auxiliary fixing device 2 first adjusts itself to a suitable position by adjusting the distance push rod 201, and then presses the support plate 205 downward to fit the ground by lifting push rod 203. During this process, the insertion plate 204 and the fixing pile 206 are inserted into the ground to improve the stability of the device. The distance of the fixing pile 206 inserted into the ground can be adjusted by the operator by the positioning screw 208. Then, the lifting push rod 16 lifts the lifting plate 17 upward, so that the lifting plate 17 and the rotating table 22 are locked together to prevent the rotating table 22 from rotating during operation and improve the stability of the equipment.

[0039] S2. Direction Adjustment: First, the tilt angle driving device 14 drives the tilt angle adjusting gear ring 12 to rotate, thereby initially rotating the guide plate 301 and the rotating guide seat 407 to the specified angle. Then, the connectors 304 located on the first adjusting push rod 302 and the second adjusting push rod 303 are manually fixed to the corresponding docking seats 10. At least three docking seats are equally spaced at different distances from the rotating guide seat 407 on the bearing plate 5. At this time, the guide plate 301 can be more stably adjusted to the corresponding tilt angle by using the first adjusting push rod 302 and the second adjusting push rod 303. This effectively eliminates the problem of dead angles in tilt adjustment or variations in support at specific angles that exist in traditional push rod fixing methods where the position cannot be manually changed. After the drilling drive device 4 is raised to the specified tilt angle using the tilt adjustment device 3, the position of the rotating connecting sleeve 404 is then finely adjusted using the auxiliary adjustment device 6, so that the rotating connecting sleeve 404 can be strictly aligned with the drilling position and drilling direction. The first fine adjustment push rod 604 can be used to adjust the front and rear position of the drill rod 21, while the second fine adjustment push rod 602 can be used to adjust the left and right position of the drill rod 21.

[0040] S3. Drilling: Install the drill rod 21 at the end of the rotating connecting sleeve 404 and install the drill bit on the drill rod 21. Then, use the main motor 401 to drive the rotating connecting sleeve 404 to rotate the drill rod 21. Use the feed adjustment push rod 406 to control the rotation speed. After the drill rod 21 has finished advancing, disconnect the connection between the drill rod 21 and the rotating connecting sleeve 404 and connect a new drill rod 21. Then repeat the work until the drilling operation is completed.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surface drilling device for underground grouting and filling in coal mines, comprising a tracked drive base (1), characterized in that: A lifting seat (19) is installed above the track drive base (1) via a height adjustment push rod (18), and a rotating platform (22) is rotatably installed on the lifting seat (19). An auxiliary fixing device (2) for auxiliary support is provided on the side of the rotating platform (22). A guide bearing rail (20) for supporting the rotating platform (22) is fixedly installed on the lifting seat (19), and a bearing plate (5) is installed on the rotating platform (22) via an auxiliary adjustment device (6) that can adjust the forward, backward, left and right movement distance. A drilling drive device (4) and an inclination adjustment device (3) for adjusting the direction of the drilling drive device (4) are provided above the support plate (5). The drilling drive device (4) includes a rotating guide seat (407) that rotates with the support plate (5) and is used to slide the drill rod (21). The inclination adjustment device (3) includes a guide plate (301) that is fixedly installed with the rotating guide seat (407). A movable stage (408) is slidably installed on the guide plate (301) via a guide rail. A rotating connecting sleeve (404) that drives the drill rod (21) to rotate is driven by a main motor (401) on the movable stage (408). The movable stage (408) and the rotating guide seat (407) are connected by a feed adjustment push rod (406). A control console is fixedly installed on the rotating stage (22). 8), the control console (8) is electrically connected to the track drive base (1), the feed adjustment push rod (406) and the height adjustment push rod (18) respectively; the auxiliary adjustment device (6) includes a first movable plate (603) slidably mounted on the guide rail on the turntable (22), and the first movable plate (603) is connected to the turntable (22) through a first fine adjustment push rod (604). A second movable plate (601) is slidably mounted on the first movable plate (603) through the guide rail, and the second movable plate (601) is connected to the first movable plate (603) through a second fine adjustment push rod (602). The upper end of the second movable plate (601) is fixedly mounted to the bearing plate (5), and both the first fine adjustment push rod (604) and the second fine adjustment push rod (602) are electrically connected to the control console (8); A main gear ring (403) is fixedly installed on the rotating connecting sleeve (404). The output end of the main motor (401) drives a main gear (402) that meshes with the main gear ring (403). An angle adjustment gear ring (12) is fixedly installed on the rotating shaft of the rotating guide seat (407). An angle adjustment motor (14) is fixedly installed on the bearing plate (5). The output end of the angle adjustment motor (14) drives an angle adjustment gear (13) that meshes with the angle adjustment gear ring (12). The angle adjustment motor (14) is electrically connected to the control console (8). The guide plate (301) is hinged from top to bottom. The device is equipped with a first adjusting push rod (302) and a second adjusting push rod (303), and the output ends of the first adjusting push rod (302) and the second adjusting push rod (303) are hinged with connectors (304). The connectors (304) are snapped into the docking seat (10) located on the bearing plate (5), and the first adjusting push rod (302) and the second adjusting push rod (303) are electrically connected to the control console (8). A guide sleeve (405) for guiding the movement direction of the drill rod (21) is fixedly installed on the guide plate (301), and a shock-absorbing rubber sleeve is fixedly installed at the contact point between the guide sleeve (405) and the drill rod (21).

2. The surface drilling device for underground grouting and filling in coal mines according to claim 1, characterized in that: A direction adjustment gear ring (15) is fixedly installed at the bottom of the rotating platform (22), and a direction adjustment motor (11) is fixedly installed below the lifting seat (19). The output end of the direction adjustment motor (11) drives a direction adjustment gear (9) that meshes with the direction adjustment gear ring (15), and the direction adjustment motor (11) is electrically connected to the control console (8).

3. The surface drilling device for underground grouting and filling in coal mines according to claim 1, characterized in that: A lifting push rod (16) is fixedly installed on the lifting seat (19), and the output end of the lifting push rod (16) drives a lifting plate (17). A toothed groove is provided on the lifting plate (17), and a toothed mating groove is provided on the rotating table (22) to engage with the toothed groove on the lifting plate (17).

4. The surface drilling device for underground grouting and filling in coal mines according to claim 1, characterized in that: A toolbox (7) is fixedly installed on the side of the rotating table (22), and a support platform for the operator to stand on is fixedly installed below the control console (8).

5. A surface drilling device for underground grouting and filling in coal mines according to claim 1, characterized in that: The auxiliary fixing device (2) includes a connecting seat (202), and a distance adjustment push rod (201) is fixedly installed on the connecting seat (202). The output end of the distance adjustment push rod (201) is fixedly installed on the rotating table (22). A lifting push rod (203) is fixedly installed on the connecting seat (202), and the output end of the lifting push rod (203) drives a support plate (205) for pressing on the ground. An insertion plate (204) for inserting into the soil is fixedly installed below the support plate (205), and a fixing pile (206) for inserting into the soil is slidably installed on the side of the support plate (205). The fixing pile (206) has positioning holes (207) arranged in an equidistant array, and a positioning screw (208) that cooperates with the positioning holes (207) to fix the fixing pile (206) is screwed onto the connecting seat (202).

6. The operation method of the drilling method of the ground drilling device for underground grouting and filling in coal mines as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Initial fixing: First, the device is transported to the construction site by an external transport vehicle. Then, the device is driven by the track on the track drive base (1) to the vicinity of the work position where the marking line has been drawn in advance and the position of the track drive base (1) is roughly adjusted. Then, the track drive base (1) stops working and the rotating table (22) is rotated to a position aligned with the drilling direction. Then, the rotating table (22) is fixed to the ground by the auxiliary fixing device (2). S2. Direction adjustment: Use the tilt adjustment device (3) to raise the drilling drive device (4) to the specified tilt angle, and then use the auxiliary adjustment device (6) to finely adjust the position pointed to by the rotating connecting sleeve (404) so ​​that the rotating connecting sleeve (404) can be strictly aligned with the drilling position and drilling direction; S3. Drilling: Install the drill rod (21) at the end of the rotating connecting sleeve (404) and install the drill bit on the drill rod (21). Then, use the main motor (401) to drive the rotating connecting sleeve (404) to rotate the drill rod (21). Use the feed adjustment push rod (406) to control the rotation speed. After the drill rod (21) has been advanced, disconnect the connection between the drill rod (21) and the rotating connecting sleeve (404) and connect a new drill rod (21). Then repeat the work until the drilling operation is completed.

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