Segmented power coal drawing and cave forming equipment for broken soft low-permeability coal seam horizontal well

Abstract

The invention discloses segmented power coal drawing and cave forming equipment for a broken soft low-permeability coal seam horizontal well, which comprises a fixed bearing plate, six lifting driving wheels are fixedly assembled on the lower surface of the fixed bearing plate, and a position adjusting drilling and cave forming assembly, a slurry separator, a coal dust box and a plurality of drill rod standby frames are fixedly assembled on the upper surface of the fixed bearing plate; the multiple drill rod standby frames are all arranged on the inner side of the position adjusting, drilling and cave forming assembly. And the extraction pipe coiling device is fixedly assembled on the upper surface of the slurry separator, the slurry separator and one side face of the coal dust box are arranged in an overlapped mode and are both placed on one side of the position adjusting, drilling and cave forming assembly, and meanwhile a slurry tank is fixedly assembled on the upper surface of the coal dust box.

Description

Technical Field

[0001] The invention relates to the technical field of coal seam mining, and in particular to a segmented power coal digging and caving equipment for horizontal wells in broken soft and low-permeability coal seams. Background Art

[0002] Broken, soft and low-permeability coal seams have low firmness coefficient, poor permeability and difficulty in drilling holes. After drilling is completed, special tools for coal digging and hole making are used to carry out coal digging and hole making operations. By forming cavities or caves, the original structure of the coal seam is broken and the cracks and porosity of the coal seam are increased, which makes it easier for the gas in the coal seam to flow and diffuse, thereby improving the permeability of the coal seam and making coalbed methane easier to extract. At the same time, the application of coal digging and hole making equipment can greatly improve the extraction efficiency of coalbed methane, shorten the extraction cycle, and can reduce or replace some of the bottom extraction tunnel engineering work in the well, thereby saving gas control costs to the maximum extent.

[0003] However, the existing equipment can only adjust the angle when drilling, and cannot effectively adjust the height of the horizontal borehole. In addition, for horizontal wells in coal seams, the drilling position of the existing equipment is usually fixed relative to the device. When facing other more complex positions close to the horizontal well wall, the existing equipment cannot effectively perform drilling work.

[0004] Therefore, it is necessary to provide a segmented power coal digging and caving equipment for horizontal wells in broken soft and low permeability coal seams to solve the above problems. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: a segmented power coal digging and caving equipment for horizontal wells in broken soft and low permeability coal seams, comprising:

[0006] A fixed carrier plate, the lower surface of which is fixedly equipped with six lifting drive wheels, the upper surface of which is fixedly equipped with a position-adjusting drilling and hole-making component, a slurry separator, a coal dust box and a plurality of drill rod spare racks, and the plurality of drill rod spare racks are all arranged on the inner side of the position-adjusting drilling and hole-making component;

[0007] The extraction tube reel is fixedly mounted on the upper surface of the slurry separator. The slurry separator is overlapped with one side of the coal dust box and both are placed on one side of the positioning drilling and hole making component. At the same time, a slurry tank is fixedly mounted on the upper surface of the coal dust box.

[0008] Further, as a preference, the extraction tube reel is provided with an output pipe and an input pipe, and one end of the input pipe and the output pipe are connected to the positioning drilling and hole making assembly, and the other ends of the output pipe and the input pipe of the extraction tube reel are respectively connected to the input pipe of the slurry separator and the output pipe of the slurry tank, and the slurry separator is provided with two output pipes, and the two output pipes are respectively connected to the input pipe of the slurry separator and the coal dust box.

[0009] Further, as a preference, the plurality of drill rod spare racks are respectively provided with drill rods of different diameters and lengths, and the drill rods on each of the drill rod spare racks have the same size.

[0010] Further, as a preference, the lifting drive wheel comprises:

[0011] A fixed frame, fixedly mounted on the lower surface of the fixed bearing plate, with a rotating connecting rod rotatably mounted on the lower end, and an adjusting hydraulic cylinder rotatably arranged between the rotating connecting rod and the fixed frame;

[0012] Two traveling wheels are arranged in a mirror image and are rotatably placed on both sides of the rotating connecting rod, and the first driving motors are arranged on the two traveling wheels.

[0013] Further, as a preference, the positioning drilling and cavitation assembly comprises:

[0014] A fixed frame, fixedly mounted on the upper surface of the fixed bearing plate, the fixed frame is a cubic frame, the inner sides of the four vertical columns of which are fixedly mounted with first tracks, a second drive motor is fixedly mounted under each first track, an adjusting screw is fixedly mounted on the output shaft of each second drive motor, a first sliding block is spirally mounted on each adjusting screw, and each first sliding block is slidably mounted on the corresponding first track;

[0015] There are two second rails, both of which are fixedly assembled between the two first sliding blocks on the parallel lines of the drill rod spare rack, and the drill rod pushing and disassembly components and the drill bit positioning and adjustment components are slidably arranged on the two second rails, and the drill rod pushing and disassembly components are arranged close to the extraction pipe coil loader.

[0016] Further, as a preference, the drill rod pushing and disassembling assembly comprises:

[0017] The second sliding block is provided with two mirror images, and is respectively slidably provided on the two second rails, a third rail is fixedly installed between the two second sliding blocks, a third sliding block is slidably provided on the third rail, a fourth rail is horizontally fixedly provided on the upper surface of the third sliding block, a fifth sliding block is slidably provided on the upper surface of the fourth rail, and a drill rod clamping pusher is fixedly installed on the upper end of the fifth sliding block;

[0018] The drill pipe fixing assembly is fixedly embedded on the side of the fourth track away from the extraction pipe coil loader.

[0019] Further, as a preference, the drill rod fixing assembly comprises:

[0020] A third drive motor is fixedly embedded in the fourth track at a side away from the extraction tube reel loader, a rotating column is fixedly mounted on the output shaft of the third drive motor, a sliding supplementary track and a fixed plate are relatively arranged on the outer side of the rotating column, and a lifting plate is fixedly mounted on the other side of the fixed plate;

[0021] A fixed bracket is fixedly assembled on the other side of the lifting plate. Clamping claws are arranged at both ends of the fixed bracket. The two clamping claws are used to fix the drill rod.

[0022] Further, as a preference, the drill bit positioning and adjusting assembly comprises:

[0023] The sixth sliding block is provided with two mirror images, and is respectively slidably provided on the two second rails, a fifth rail is fixedly assembled between the two sixth sliding blocks, a seventh sliding block is slidably provided on the fifth rail, a sixth rail is horizontally slidably provided on the upper surface of the seventh sliding block, a drilling locator is provided on the side of the sixth rail away from the drill rod pushing and disassembly assembly, and a drill rod fixture is embedded on the drilling locator;

[0024] The drill bit replacement assembly is fixedly assembled on the upper surface of the drilling locator.

[0025] Further, as a preference, the drill bit replacement assembly comprises:

[0026] A fixed connecting block is fixedly assembled on the upper surface of the drilling locator, and a fourth drive motor is fixedly assembled on the side of the fixed connecting block away from the sixth track. A rotating plate is fixedly assembled on the output shaft of the fourth drive motor, and a plurality of through holes are arranged on the rotating plate, and a clamping fixing ring is arranged in each through hole, and a roller drill bit, a drilling drill bit, a PDC drill bit and a coreless drill bit are respectively clamped on the clamping fixing rings of the plurality of through holes.

[0027] Further, preferably, the fourth track, the sliding supplementary track and the sixth track can form a track group for the fifth sliding block to slide.

[0028] Compared with the prior art, the present invention provides a segmented power coal digging and hole making device for horizontal wells in broken soft and low permeability coal seams, which has the following beneficial effects:

[0029] In the present invention, the arrangement of the six lifting drive wheels enables the fixed support plate to remain horizontal after the device reaches the drilling position through the lifting and lowering adjustment of the six lifting drive wheels, thereby preventing the drilling position from being offset due to unevenness below the device.

[0030] In the present invention, the position-adjusting drilling and hole-forming component can adjust the horizontal and vertical positions of the borehole according to the drilling position, and select a suitable drill bit for drilling, so that the device can cope with complex underground environments, increase the practicality of the device, and through the cooperation of various components on the position-adjusting drilling and hole-forming component, the entire coal digging and hole-forming work can be completed automatically, greatly improving work efficiency and safety at the same time.

[0031] In the present invention, the extraction tube reel loader integrates pipelines to input the slurry in the slurry tank into the borehole as the drilling work progresses, and then the mixed slurry output from the borehole is transported to the slurry separator. The slurry separator separates the slurry from the coal dust, and then the separated slurry is transported to the slurry tank for recycling again, and the coal dust is stored in the coal dust box. While completing the coal removal, the slurry is recycled and the working cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of a segmented power coal digging and cave-making equipment for horizontal wells in broken soft and low-permeability coal seams;

[0033] Figure 2 It is a schematic diagram of the lifting drive wheel structure;

[0034] Figure 3 This is a schematic diagram of the structure of the adjustment drilling and hole making assembly;

[0035] Figure 4 This is a schematic diagram of the drill rod push disassembly assembly structure;

[0036] Figure 5 It is a structural schematic diagram of the drill pipe fixing assembly;

[0037] Figure 6 This is a structural diagram of the drill bit positioning and adjustment assembly;

[0038] Figure 7 This is a schematic diagram of the drill bit replacement assembly structure;

[0039] In the figure: 1. Fixed bearing plate; 2. Lifting drive wheel; 3. Adjusting drilling hole forming assembly; 4. Drill rod spare rack; 5. Extraction pipe reel loader; 6. Slurry separator; 7. Slurry tank; 8. Coal dust box; 21. Fixed frame; 22. Rotating connecting rod; 23. Adjusting hydraulic cylinder; 24. Traveling wheel; 25. First driving motor; 31. Fixed frame; 32. First track; 33. Second driving motor; 34. Adjusting screw; 35. First sliding block; 36. Second track; 37. Drill rod pushing and disassembling assembly; 38. Drill bit positioning and adjusting assembly; 371. Second sliding block; 372. Third track; 373. Third sliding block; 374. Fourth track; 375. Fifth sliding block; 376. Drill rod clamp holding pusher; 377, drill pipe fixing assembly; 381, sixth sliding block; 382, ​​fifth track; 383, seventh sliding block; 384, sixth track; 385, drilling locator; 386, drill pipe fixture; 387, drill bit replacement assembly; 3771, third drive motor; 3772, rotating column; 3773, sliding supplementary track; 3774, fixed plate; 3775, lifting plate; 3776, fixed bracket; 3777, clamping claw; 3871, fixed connecting block; 3872, fourth drive motor; 3873, rotating plate; 3874, clamping fixing ring; 3875, roller drill bit; 3876, drilling drill bit; 3877, PDC drill bit; 3878, coreless drill bit. DETAILED DESCRIPTION

[0040] See also Figure 1 to Figure 7 The present invention provides a segmented power coal digging and cave-making equipment for horizontal wells in broken soft and low permeability coal seams, comprising:

[0041] A fixed carrier plate 1, on the lower surface of which six lifting drive wheels 2 are fixedly mounted, and on the upper surface of the fixed carrier plate 1 there are fixedly mounted a position-adjusting drilling and hole-making component 3, a slurry separator 6, a coal dust box 8 and a plurality of drill rod spare racks 4, and the plurality of drill rod spare racks 4 are all arranged on the inner side of the position-adjusting drilling and hole-making component 3;

[0042] The extraction pipe coil 5 is fixedly mounted on the upper surface of the slurry separator 6. The slurry separator 6 is overlapped with one side of the coal dust box 8 and both are placed on one side of the positioning drilling and hole making component 3. At the same time, a slurry tank 7 is fixedly mounted on the upper surface of the coal dust box 8.

[0043] As a preferred embodiment, the arrangement of the six lifting drive wheels 2 can enable the device to maintain a horizontal state after reaching the drilling position through the lifting adjustment of the six lifting drive wheels 2, thereby preventing the drilling position from being offset due to the uneven position below the device. The adjustment drilling and hole making component 3 can adjust the horizontal and vertical positions of the borehole according to the drilling position, and select a suitable drill bit for drilling, so that the device can cope with complex underground environments and increase the practicality of the device. The drill rod spare rack 4 is used to place spare drill rods, and the extraction pipe loader 5 will integrate the pipeline to input the slurry in the slurry tank 7 into the borehole as the drilling work proceeds, and then the mixed slurry output from the borehole is transported to the slurry separator 6, and the slurry separator 6 will separate the slurry from the coal dust, and then the separated slurry is transported to the slurry tank 7 for recycling, and the coal dust is stored in the coal dust box 8.

[0044] Further, the extraction tube coil 5 is provided with an output tube and an input tube, and one end of the input tube and the output tube are connected to the adjustment drilling and hole making assembly 3, and the other ends of the output tube and the input tube of the extraction tube coil 5 are respectively connected to the input tube of the slurry separator 6 and the output tube of the slurry tank 7, and the slurry separator 6 is provided with two output tubes, and the two output tubes are respectively connected to the input tube of the slurry separator 6 and the coal dust box 8;

[0045] As a preferred embodiment, the extraction tube reel 5 will integrate pipelines, and the slurry in the slurry tank 7 will be input into the borehole through the output pipe of the extraction tube reel 5 as the drilling work progresses, and then the mixed slurry output from the borehole will be transported to the slurry separator 6 through the input pipe of the extraction tube reel 5. The slurry separator 6 will separate the slurry from the coal dust, and then the separated slurry will be transported to the slurry tank 7 and the coal dust box 8 respectively through two output pipes.

[0046] Furthermore, the plurality of drill rod spare racks 4 are respectively provided with drill rods of different diameters and lengths, and the size of the drill rods on each of the drill rod spare racks 4 is the same;

[0047] As a preferred embodiment, the number of spare drill rods stored on each drill rod spare rack 4 is kept consistent, so as to control the height of the drill rod spare rack 4 and prevent it from affecting the vertical adjustment of the drilling position, and drill rods of the same diameter but different lengths are used to solve the problem of different drilling depths, and drill rods of the same length but different diameters are used to match drill bits with different drilling requirements.

[0048] Further, the lifting drive wheel 2 comprises:

[0049] A fixed frame 21 is fixedly mounted on the lower surface of the fixed bearing plate 1, and a rotating connecting rod 22 is rotatably mounted on the lower end thereof, and an adjusting hydraulic cylinder 23 is rotatably arranged between the rotating connecting rod 22 and the fixed frame 21;

[0050] Two traveling wheels 24 are arranged in mirror image and are rotatably placed on both sides of the rotating connecting rod 22 , and first driving motors 25 are arranged on the two traveling wheels 24 .

[0051] Further, the positioning drilling and hole making assembly 3 comprises:

[0052] A fixed frame 31 is fixedly mounted on the upper surface of the fixed bearing plate 1. The fixed frame 31 is a cubic frame, and the first rails 32 are fixedly mounted on the inner sides of the four vertical columns. A second driving motor 33 is fixedly mounted under each first rail 32. An adjusting screw 34 is fixedly mounted on the output shaft of each second driving motor 33. A first sliding block 35 is spirally mounted on each adjusting screw 34, and each first sliding block 35 is slidably mounted on the corresponding first rail 32.

[0053] Two second rails 36 are provided, both of which are fixedly mounted between two first sliding blocks 35 on the parallel lines of the drill rod standby rack 4, and a drill rod pushing and disassembling assembly 37 and a drill bit positioning and adjusting assembly 38 are slidably arranged on the two second rails 36, and the drill rod pushing and disassembling assembly 37 is arranged close to the extraction pipe coil loader 5;

[0054] As a preferred embodiment, the drill rod pushing and disassembly assembly 37 can clamp the drill rod and push the drill rod and the drill bit thereon to perform drilling work. At the same time, the drill rod disassembly and assembly work can also be completed with the assistance of the drill bit positioning and adjustment assembly 38. The drill bit positioning and adjustment assembly 38 can also locate and fix the drilling position, and provide and select a suitable drill bit. The setting of the first track 32 can enable the drill rod pushing and disassembly assembly 37 and the drill bit positioning and adjustment assembly 38 to be raised and lowered under the drive of the second drive motor 33, thereby completing the horizontal adjustment of the entire drilling position. At the same time, the setting of the second track 36 can enable the drill rod pushing and disassembly assembly 37 and the drill bit positioning and adjustment assembly 38 to adjust their positions relative to the second track 36 within a certain range, thereby changing the relative position of the drill bit positioning and adjustment assembly 38 and the device, thereby adapting to complex underground environments.

[0055] Further, the drill rod pushing and disassembling assembly 37 comprises:

[0056] Two second sliding blocks 371 are mirror-imaged and slidably disposed on the two second rails 36, respectively; a third rail 372 is fixedly mounted between the two second sliding blocks 371, a third sliding block 373 is slidably mounted on the third rail 372, a fourth rail 374 is horizontally fixedly mounted on the upper surface of the third sliding block 373, a fifth sliding block 375 is slidably mounted on the upper surface of the fourth rail 374, and a drill rod clamping pusher 376 is fixedly mounted on the upper end of the fifth sliding block 375;

[0057] A drill pipe fixing assembly 377, fixedly embedded on the fourth track 374 at a side away from the extraction pipe coil loader 5;

[0058] As a preferred embodiment, the positions of the fourth track 374 and the components thereon can be adjusted by sliding the third sliding block 373 on the third track 372, so that the drilling position of the device can be adjusted in the horizontal direction. At the same time, when the drilling position is fixed, the drill rod fixing assembly 377 can be moved to a suitable drill rod spare rack 4 to transport the drill rod. The drill rod clamping pusher 376 is used to clamp the drill rod and drill the drill rod to complete the drilling work, and the fifth sliding block 375 pushes the drill rod and the drill bit to complete the drilling.

[0059] Further, the drill rod fixing assembly 377 includes:

[0060] The third driving motor 3771 is fixedly embedded in the fourth track 374 on the side away from the extraction tube coil loader 5. A rotating column 3772 is fixedly mounted on the output shaft of the third driving motor 3771. A sliding supplementary track 3773 and a fixed plate 3774 are relatively arranged on the outer side of the rotating column 3772. A lifting plate 3775 is fixedly mounted on the other side of the fixed plate 3774.

[0061] A fixed bracket 3776 is fixedly assembled on the other side of the lifting plate 3775. Both ends of the fixed bracket 3776 are provided with clamping claws 3777. The two clamping claws 3777 are used to fix the drill rod;

[0062] As a preferred embodiment, the clamping claw 3777 can rotate at a large angle (the maximum angle between its clamping positions can be 300°). In the initial state, the fixed bracket 3776 is located directly below the rotating column 3772. When the drill rod needs to be removed, the third drive motor 3771 will drive the rotating column 3772 to rotate 180°, so that the fixed bracket 3776 comes to the top of the rotating column 3772, and then clamps the drill rod that needs to be removed. After the drill rod is separated, it continues to drill 180°, and the drill rod is placed in the corresponding position by extending the lifting plate 3775. When the drill rod needs to be installed, the corresponding drill rod is clamped by extending the lifting plate 3775, and then the third drive motor 3771 will drive the rotating column 3772 to rotate 180°, so that the fixed bracket 3776 comes to the top of the rotating column 3772. After the drill rod is installed, it returns to the initial position.

[0063] Further, the drill bit positioning adjustment assembly 38 includes:

[0064] There are two sixth sliding blocks 381, which are mirror-imaged and slidably disposed on the two second rails 36, respectively. A fifth rail 382 is fixedly mounted between the two sixth sliding blocks 381, a seventh sliding block 383 is slidably disposed on the fifth rail 382, ​​a sixth rail 384 is horizontally slidably disposed on the upper surface of the seventh sliding block 383, a drilling locator 385 is disposed on the side of the sixth rail 384 away from the drill rod pushing and disassembly assembly 37, and a drill rod fixture 386 is embedded on the drilling locator 385;

[0065] A drill bit replacement assembly 387, fixedly mounted on the upper surface of the drilling locator 385;

[0066] As a preferred embodiment, when drilling, the seventh sliding block 383 and the third sliding block 373 are maintained at the same horizontal position, the drilling position locator 385 can locate the drilling position and be fixed at the drilling position to prevent the drilling from shifting, and the drill rod fixer 386 can clamp and fix the drill rod, thereby facilitating the disassembly and assembly between the drill bit and the drill rod and between the drill rods.

[0067] Further, the drill bit replacement assembly 387 includes:

[0068] A fixed connection block 3871 is fixedly mounted on the upper surface of the drilling positioner 385. A fourth drive motor 3872 is fixedly mounted on the side of the fixed connection block 3871 away from the sixth track 384. A rotating plate 3873 is fixedly mounted on the output shaft of the fourth drive motor 3872. A plurality of through holes are arranged on the rotating plate 3873. A clamping and fixing ring 3874 is arranged in each through hole. A roller drill bit 3875, a drilling drill bit 3876, a PDC drill bit 3877 and a coreless drill bit 3878 are clamped on the clamping and fixing rings 3874 of the plurality of through holes respectively.

[0069] As a preferred embodiment, the roller drill bit 3875, the well drilling bit 3876, the PDC drill bit 3877 and the coreless drill bit 3878 can cope with the complex coal seam environment and complete the tasks of drilling, expanding the diameter, and digging coal holes. Through the rotation of the fourth drive motor 3872, all tasks can be completed step by step in sequence. At the same time, in actual work, the number and type of drill bits can be adjusted according to actual conditions. At the same time, the inner diameter of the clamping and fixing ring 3874 in the non-clamping state should be larger than the diameter of all drill rods.

[0070] Furthermore, the fourth track 374, the sliding supplementary track 3773 and the sixth track 384 can form a track group for the fifth sliding block 375 to slide;

[0071] As a preferred embodiment, the setting of the track group can enable the fifth sliding block 375 to complete the drilling work more efficiently without affecting other work.

[0072] During the specific implementation, the following steps are included: selecting a suitable drill bit and a corresponding drill rod according to the actual underground conditions; after the lifting drive wheel 2 driving device reaches the drilling position, the fixed supporting plate 1 is kept in a horizontal state through the lifting and adjustment of the six lifting drive wheels 2; then the positioning drilling and hole making component 3 can adjust the horizontal and vertical positions of the borehole according to the drilling position, and select a suitable drill bit for drilling; the drill rod spare rack 4 provides a spare drill rod for the drilling of the positioning drilling and hole making component 3; the extraction pipe reel loader 5 inputs the slurry in the slurry tank 7 into the borehole through the output pipe of the extraction pipe reel loader 5 as the drilling work proceeds; and then the mixed slurry output from the borehole is transported to the slurry separator 6 through the input pipe of the extraction pipe reel loader 5; the slurry separator 6 separates the slurry from the coal dust; and then the separated slurry is transported to the slurry tank 7 and the coal dust box 8 through two output pipes respectively, until the coal digging and hole making work is completed.

[0073] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A segmented power coal digging and hole making equipment for horizontal wells in broken soft and low permeability coal seams, characterized by: include: A fixed carrier plate (1) is fixedly provided with six lifting drive wheels (2) on its lower surface, and a position-adjusting drilling and hole-making component (3), a slurry separator (6), a coal dust box (8) and a plurality of drill rod spare racks (4) are fixedly provided on the upper surface of the fixed carrier plate (1), and the plurality of drill rod spare racks (4) are all arranged on the inner side of the position-adjusting drilling and hole-making component (3); The extraction tube coil loader (5) is fixedly mounted on the upper surface of the slurry separator (6). The slurry separator (6) is arranged to overlap with one side of the coal dust box (8) and are both placed on one side of the positioning drilling and hole making component (3). At the same time, a slurry tank (7) is fixedly mounted on the upper surface of the coal dust box (8).

2. The segmented power coal digging and hole making equipment for horizontal wells in crushed soft and low permeability coal seams according to claim 1 is characterized by: The extraction tube coiler (5) is provided with an output tube and an input tube, and one end of the input tube and the output tube are both connected to the positioning drilling and hole making assembly (3), and the other ends of the output tube and the input tube of the extraction tube coiler (5) are respectively connected to the input tube of the slurry separator (6) and the output tube of the slurry tank (7), and the slurry separator (6) is provided with two output tubes, and the two output tubes are respectively connected to the input tube of the slurry separator (6) and the coal dust box (8).

3. The segmented power coal digging and hole making equipment for horizontal wells in crushed soft and low permeability coal seams according to claim 1 is characterized by: The plurality of drill rod spare racks (4) are respectively provided with drill rods of different diameters and lengths, and the drill rods on each drill rod spare rack (4) have the same size.

4. The segmented power coal digging and hole making equipment for horizontal wells in crushed soft and low permeability coal seams according to claim 1 is characterized by: The lifting drive wheel (2) comprises: A fixed frame (21) is fixedly mounted on the lower surface of the fixed bearing plate (1), and a rotating connecting rod (22) is rotatably mounted on the lower end thereof, and an adjusting hydraulic cylinder (23) is rotatably arranged between the rotating connecting rod (22) and the fixed frame (21); Two traveling wheels (24) are arranged in mirror image and are rotatably placed on both sides of the rotating connecting rod (22), and a first driving motor (25) is arranged on the two traveling wheels (24).

5. The segmented power coal digging and hole making equipment for horizontal wells in crushed soft and low permeability coal seams according to claim 1 is characterized by: The positioning drilling and cavitation assembly (3) comprises: A fixed frame (31) is fixedly mounted on the upper surface of the fixed bearing plate (1), the fixed frame (31) is a cubic frame, the inner sides of the four vertical columns of which are fixedly mounted with first rails (32), a second drive motor (33) is fixedly mounted below each first rail (32), an adjusting screw (34) is fixedly mounted on the output shaft of each second drive motor (33), each adjusting screw (34) is spirally mounted with a first sliding block (35), and each first sliding block (35) is slidably mounted on the corresponding first rail (32); The second rails (36) are provided with two pieces, both of which are fixedly mounted between the two first sliding blocks (35) on the parallel lines of the drill rod spare rack (4), and the drill rod pushing and disassembly components (37) and the drill bit positioning and adjustment components (38) are slidably arranged on the two second rails (36), and the drill rod pushing and disassembly components (37) are arranged close to the extraction pipe coil loader (5).

6. The segmented power coal digging and hole-making equipment for horizontal wells in crushed soft and low-permeability coal seams according to claim 5 is characterized by: The drill rod pushing and disassembling assembly (37) comprises: Two second sliding blocks (371) are arranged in a mirror image and are respectively slidably arranged on the two second rails (36); a third rail (372) is fixedly installed between the two second sliding blocks (371); a third sliding block (373) is slidably installed on the third rail (372); a fourth rail (374) is horizontally fixedly installed on the upper surface of the third sliding block (373); a fifth sliding block (375) is slidably installed on the upper surface of the fourth rail (374); a drill rod clamping pusher (376) is fixedly installed on the upper end of the fifth sliding block (375); The drill rod fixing assembly (377) is fixedly mounted on the side of the fourth track (374) away from the extraction pipe coil loader (5).

7. The segmented power coal digging and hole-making equipment for horizontal wells in crushed soft and low-permeability coal seams according to claim 6 is characterized by: The drill rod fixing assembly (377) comprises: A third driving motor (3771) is fixedly mounted on the side of the fourth track (374) away from the extraction tube coil loader (5); a rotating column (3772) is fixedly mounted on the output shaft of the third driving motor (3771); a sliding supplementary track (3773) and a fixed plate (3774) are relatively arranged on the outer side of the rotating column (3772); and a lifting plate (3775) is fixedly mounted on the other side of the fixed plate (3774); A fixed bracket (3776) is fixedly assembled on the other side of the lifting plate (3775), and clamping claws (3777) are provided at both ends of the fixed bracket (3776). The two clamping claws (3777) are used to fix the drill rod.

8. The segmented power coal digging and hole-making equipment for horizontal wells in crushed soft and low-permeability coal seams according to claim 7 is characterized by: The drill bit positioning and adjusting assembly (38) comprises: There are two sixth sliding blocks (381) mirror-imaged and respectively slidably arranged on the two second rails (36); a fifth rail (382) is fixedly mounted between the two sixth sliding blocks (381); a seventh sliding block (383) is slidably arranged on the fifth rail (382); a sixth rail (384) is horizontally slidably arranged on the upper surface of the seventh sliding block (383); a drilling locator (385) is arranged on the side of the sixth rail (384) away from the drill rod pushing and disassembly assembly (37); a drill rod fixture (386) is embedded on the drilling locator (385); The drill bit replacement assembly (387) is fixedly mounted on the upper surface of the drilling locator (385).

9. The segmented power coal digging and hole making equipment for horizontal wells in crushed soft and low permeability coal seams according to claim 8 is characterized by: The drill bit replacement assembly (387) comprises: A fixed connection block (3871) is fixedly mounted on the upper surface of the drilling locator (385); a fourth drive motor (3872) is fixedly mounted on the side of the fixed connection block (3871) away from the sixth track (384); a rotating plate (3873) is fixedly mounted on the output shaft of the fourth drive motor (3872); a plurality of through holes are arranged on the rotating plate (3873); a clamping and fixing ring (3874) is arranged in each through hole; and a roller drill bit (3875), a drilling drill bit (3876), a PDC drill bit (3877) and a coreless drill bit (3878) are clamped on the clamping and fixing rings (3874) of the plurality of through holes.

10. The segmented power coal digging and hole making equipment for horizontal wells in crushed soft and low permeability coal seams according to claim 9, characterized in that: The fourth track (374), the sliding supplementary track (3773) and the sixth track (384) can form a track group for the fifth sliding block (375) to slide.

Images