Integrated coal mining machine with coal mining and drilling functions
By integrating drilling functionality into the coal mining machine, drilling and coal mining can be carried out alternately, solving the problem of drilling operations affecting mining efficiency in gas mines, improving efficiency and safety, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-13
- Publication Date
- 2026-03-13
AI Technical Summary
In gas mines, the gas drainage process at the working face severely affects mining efficiency, and drilling operations reduce mining efficiency while increasing labor intensity and safety hazards.
Design an integrated coal mining machine that combines coal mining and drilling functions. By setting multiple drilling systems on the top surface of the machine body, drilling and coal mining can be carried out alternately. Safety is ensured by a branch control box and mechanical interlock switches.
It improves drilling efficiency, reduces labor intensity and safety hazards, enhances mining efficiency and safety, and has a compact structure, thus reducing production costs.
Smart Images
Figure CN121654408A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a coal mining machine with a working face drilling function. Background Technology
[0002] In gas-filled mines, the mining of medium-thick and thicker coal seams typically requires drilling, water injection, and gas extraction in both the roadway and the working face to reduce the gas concentration and improve mining safety. While roadway gas extraction can be carried out concurrently with working face mining without affecting progress, the working face gas extraction process significantly impacts mining efficiency. Currently, to improve drilling efficiency, multiple drilling rigs are typically arranged at intervals along the working face and drill simultaneously, with two workers per rig. After each batch of drilling is completed, the entire batch of rigs is moved to a new location and then fixed for further drilling. However, safety management regulations require controlling the number of personnel, and equipment maintenance personnel are usually reduced at the working face to accommodate drilling operations. This also prevents equipment maintenance from being carried out concurrently with drilling. Drilling operations reduce mining efficiency, increase labor intensity, create safety hazards, and negatively impact mine profitability. Summary of the Invention
[0003] This invention provides an integrated coal mining machine with both coal mining and drilling functions. It can mine coal and drill holes, and the drilling and coal mining can be carried out alternately, eliminating the need to move the drilling machine.
[0004] The main technical solutions of this invention are as follows: An integrated coal mining machine with coal mining and drilling functions includes a double-arm coal mining machine and multiple drilling systems installed on the top surface of the machine body. The drilling rigs of all systems are arranged at intervals along the length of the machine body, with the power heads of each rig pointing towards the coal face of the machine. The machine body includes a left traction box, a middle box, a right traction box, and an auxiliary platform. The left traction box, middle box, and right traction box are arranged from left to right. The auxiliary platform connects the middle box and the left traction box or the middle box and the right traction box. Correspondingly, the middle box and the right traction box... Alternatively, the left traction box can be directly connected. The auxiliary platform includes a platform housing and a drilling rig pump station and a branch control box installed inside the platform housing. The branch control box is equipped with a main incoming terminal, a pump station wiring terminal, a coal mining machine wiring terminal, and a pump station line terminal switch for controlling the circuit connection between the main incoming terminal and the pump station wiring terminal, as well as a coal mining machine line terminal switch for controlling the circuit connection between the main incoming terminal and the coal mining machine wiring terminal. The drilling rig pump station provides a hydraulic power source for the drilling system, and the pump station wiring terminal is connected to the power input terminal of the drilling rig pump station.
[0005] The pump station line-end switch and the coal mining machine line-end switch are mechanically interlocked.
[0006] The drilling rig system also includes a drilling platform and connecting rods. The drilling rig also includes a power head fixing plate, a drilling rig track, and a pushing cylinder. The front end of the drilling rig track is hinged to the drilling platform, and the rear end of the drilling rig track is hinged to the rear end of the connecting rod. The front end of the connecting rod is hinged to the drilling platform. The drilling power head is mounted on the power head fixing plate, which is slidably connected to the drilling rig track. The cylinder body of the pushing cylinder is fixedly mounted on the rear end of the drilling track, and the extended end of the cylinder rod of the pushing cylinder is hinged forward to the power head fixing plate. The power head fixing plate can move back and forth along the drilling track under the extension and retraction action of the pushing cylinder. The drilling platform is mounted on the top surface of the coal mining machine. The connecting rod is an adjustable length connecting rod or a cylinder. The drilling rig pump station provides a hydraulic power source for the pushing cylinder.
[0007] The power head fixing plate includes an upper fixing plate, a lower fixing plate, and a rear connecting plate. After the upper and lower fixing plates are fixed together, they form two arc-shaped cylindrical sliding grooves with opposite openings on the left and right sides. The power head fixing plate is slidably connected to the left and right guide rods on the drilling rig track through the arc-shaped cylindrical sliding grooves. The rear connecting plate is located behind the upper and lower fixing plates, and the cylinder rod extension end of the push cylinder is hinged to the rear connecting plate.
[0008] The drilling platform is equipped with a drill rod box at the front. The front end of the drilling rig track is hinged to the front edge of the top of the drill rod box, and the front end of the connecting rod is hinged to the rear root of the rear side plate of the drill rod box.
[0009] The integrated coal mining machine with coal mining and drilling functions also includes multiple roof protection devices arranged left and right. Each roof protection device includes a roof protection plate, a support column, and a support cylinder. The support column is fixed to the top surface of the machine body. The rear edge of the roof protection plate is hinged to the rear top of the support column. One end of the support cylinder is hinged to the support column, and the other end is hinged to the roof protection plate. Driven by the extension and retraction of the support cylinder, the roof protection plate opens and closes and flips up and down with its own rear edge as the axis. Whether the roof protection plate is in the upward unfolded state or the downward retracted state, it covers the support column and the drilling system. The roof protection plates of two adjacent roof protection devices are connected at the joint through multiple connecting structures arranged at intervals.
[0010] The support column includes a base plate extending forward and backward, and left and right panels and front and rear uprights vertically fixed on the base plate. The front and rear uprights are located between the left and right panels and close to the rear end of the base plate. The front and rear uprights and the left and right panels form a hollow column. Ribs are also connected between the left and right panels. The support cylinder is located between the left and right panels, and the end of the support cylinder that is hinged to the support column is hinged to the left and right panels. The top guard plate includes a front part and a rear part, which form an angle with the opening facing downward. Each of the left and right panels has a flat top edge, a sloping top edge that is lower in the front and higher in the back, and a front vertical edge that are connected sequentially from back to front. When the top guard plate is in a downward-folding state, its front and rear parts are respectively attached to the front vertical edge and the sloping top edge. The middle of the sloping top edge has a recessed notch.
[0011] The top protection device is also equipped with a safety bar and a safety chain. A rack is laid flat and fixed between the left and right panels on the bottom plate. The upper end of the safety bar is hinged to the front edge of the top protection plate, and the lower end of the safety bar is a free end. One end of the safety chain is connected to the lower part of the safety bar, and the other end of the safety chain passes through the column and hangs behind the column. When the top protection plate is in the upward unfolded state, the lower end of the safety bar is locked between two adjacent teeth on the rack.
[0012] The connection structure is a floating connection structure, which includes a connecting pin and a connecting pad. One end of the connecting pin has a radially protruding flange. During connection, the connecting pin is inserted from one side into a pair of connecting holes at the joint between two adjacent top guard plates. The flange acts as an axial limit on the insertion side, and the connecting pad rests against the other end face of the connecting pin as an axial limit on the opposite side of the insertion side. The two adjacent top guard plates are connected together by passing bolts through the connecting pin and the connecting pad, and putting anti-loosening washers and screw nuts on the bolts. There is a radial gap between the connecting holes and the connecting pin. The distance from the inner side of the flange to the connecting pad is greater than the sum of the thicknesses at the joint between the two adjacent top guard plates.
[0013] The integrated coal mining machine with coal mining and drilling functions also includes multiple mobile platforms. Each mobile platform includes a left platform, a right platform, a platform connecting assembly, a left outer guide bar, a right outer guide bar, and a mobile hydraulic cylinder. The hinge points of the top protection plate, the support column, and the supporting hydraulic cylinder are all located in the middle of the left-right direction of the top protection plate. The top protection plate extends outward to the left and right sides of the support column. The mobile platform and the top protection device are set one-to-one. The left and right outer guide bars extend forward and backward and are respectively arranged on the left and right sides of the corresponding support column and fixed to the top surface of the machine body. The lower left and right sides of the support column are respectively provided with left inner guide structures and right inner guide structures extending forward and backward. The left and right edges of the left platform are respectively connected to the left outer guide bar and the left inner guide bar. The structure slides back and forth, with the left and right edges of the right platform sliding back and forth with the right inner guide structure and the right outer guide strip, respectively. The rear ends of the left and right platforms are connected together by a platform connecting assembly, which is located behind the corresponding support column. The front end of the corresponding moving cylinder is hinged to the support column, and the rear end passes through the corresponding support column and is hinged to the platform connecting assembly. The left and right platforms slide back and forth under the extension and retraction of the moving cylinder. When the moving cylinder retracts, the platform connecting assembly moves forward and closer to the support column, and the front ends of the left and right platforms extend forward beyond the front end of the support column. When the moving cylinder extends, the left and right platforms move backward. The drilling system is installed on part or all of the left and right platforms, and a working space is formed between the left and right platforms and the corresponding top protection plate.
[0014] The cutting system of the coal mining machine includes a sliding part, a non-sliding part, and a sliding cylinder. The sliding part and the non-sliding part are slidably connected to each other on the left and right. The two ends of the sliding cylinder are respectively hinged to the sliding part and the non-sliding part. Under the action of the sliding cylinder, the sliding part can move back and forth relative to the non-sliding part. The non-sliding part is provided with a body connecting lug and a height adjustment cylinder connecting lug. The axes of the connecting lug holes on the body connecting lug and the height adjustment cylinder connecting lug both extend back and forth. The sliding part is provided with a cutting motor, a cutting transmission system, and a drum that are connected in sequence, with the cutting motor being closest to the non-sliding part.
[0015] The beneficial effects of this invention are: By setting up a drilling system on the top surface of the coal mining machine to carry out multi-station parallel drilling operations, compared with existing operations such as manually moving drilling rigs on conveyors, drilling efficiency is greatly improved, thereby increasing mining efficiency, while also significantly reducing labor intensity and enhancing safety.
[0016] By setting up a higher-level overall control system, the drilling system and the coal mining machine system are separated. When the drilling system on the top of the coal mining machine is operating, the cutting and traction of the coal mining machine can be stopped, which improves safety.
[0017] The addition of an auxiliary platform increased the length of the machine body, providing more installation space for multiple drilling systems to operate in parallel on the top surface of the machine body.
[0018] The use of a distribution control box enables unified power access and separate power output for the coal mining machine and drilling rig systems, while simultaneously providing control and protection for the drilling rig pump station. Multiple drilling rig systems are uniformly controlled and electrically driven by an auxiliary platform, allowing multiple drilling rigs to operate in parallel and significantly improving drilling efficiency.
[0019] The pump station line-end switch and the coal mining machine line-end switch adopt mechanical interlocking switches, which realize the single power supply of the drilling rig pump station or the coal mining machine through mechanical means (they cannot be powered on at the same time, but can be locked at the same time) to ensure the safety of personnel operation.
[0020] The power head fixing plate with a detachable upper and lower structure can greatly improve the ease of assembly, keep the drilling system production process simple and practical, and reduce the production cost of the drilling system.
[0021] The connecting rod and the drilling platform jointly support the drilling rig. Changing the length of the connecting rod can easily adjust the vertical deflection angle of the drilling rig's power head, thereby achieving vertical deflection drilling, improving the loosening effect on the coal wall, and helping to improve gas release efficiency. It can be used for drilling in working faces of high-gas coal seams. By setting the drilling rig track and the pushing cylinder, the drilling rig's power head and power head fixing plate can be precisely positioned, and a large rapid pushing force can be provided.
[0022] The drill rod box is located at the lower front of the drilling rig, which makes it easy for a single person to load and unload the drill rod at a fixed position without having to move the position. This reduces auxiliary time and improves drilling efficiency. At the same time, the structural space layout is very compact, saving equipment installation space. Therefore, the drilling rig system is more suitable for installation on the top of the coal mining machine.
[0023] The installation of the roof protection device greatly increases the safety space required for personnel to work and maintain operations.
[0024] The support column is preferably made of a thin, flat frame steel structure, which helps to improve the strength of the support connection.
[0025] The hinge points of the top guard plate, the support column, and the supporting cylinder are all located in the middle of the left-right direction of the top guard plate, so that the center of gravity of the top guard plate and the support point are basically on the same vertical plane, which helps to improve the safety of the support.
[0026] By installing safety bars, the top guard plate is provided with auxiliary support, which is equivalent to secondary protection and avoids safety hazards caused by malfunctions of the support cylinders (such as hydraulic problems). Since the safety chain is located behind the column, the structure ensures that the workers are located on the goaf side of the coal mining machine, which is equivalent to achieving tertiary protection.
[0027] The support column adopts a compact design, for example, the support column is thin and flat in the left and right directions, and the support cylinder and safety bar are set in the ample maintenance space reserved inside the support column, thus freeing up more space above the machine top and below the protective plate for use as working space.
[0028] The mobile platform can be used as an installation platform for drilling rigs. Moreover, since the left and right platforms can slide back and forth under the extension and retraction of the moving cylinders, the mobile platform can be retracted during normal coal mining operations to avoid interference with the coal face. When coal face maintenance is required after mining, it can be extended closer to the coal face to improve work efficiency.
[0029] The pressure plate, base plate, outer end guide strip, and spacer guide strip are configured as a set, providing good limiting and guidance for the forward and backward movement of the mobile platform and improving the platform's movement accuracy.
[0030] By applying the sliding cutting system, the coal mining machine of this invention can reduce the distance between the drum and the conveyor by appropriately moving the sliding part backward, thus improving the loading effect. After the conveyor moves forward with the coal mining machine, the cutting system with the sliding part positioned behind it is located above the conveyor, allowing it to easily move above the conveyor after it has moved, unaffected by the coal wall. Therefore, the conveyor can be moved normally during each coal mining stroke, eliminating the need to reserve passage space for the drum that stops rotating during drilling operations. This greatly facilitates gas drilling and drainage operations at the working face and improves mining efficiency.
[0031] Since the structure and relative position of the body connecting lug and the height adjustment cylinder connecting lug on the non-sliding part are the same as those on the existing coal mining machine rocker arm, the integrated coal mining machine with coal mining and drilling functions can be seamlessly replaced with the existing cutting system.
[0032] The sliding part and the non-sliding part are connected by a large-span track and track groove, resulting in low sliding contact force and high sliding reliability.
[0033] The track groove adopts a T-shaped groove, and the surfaces of the track and the track groove in all four directions (up, down, left, and right) are in contact. There are one or two pairs of contact surfaces in a certain direction, which greatly reduces the contact pressure and the wear at the sliding joint. Therefore, it helps to improve the service life of the integrated coal mining machine with coal mining and drilling functions.
[0034] The non-sliding part and the sliding part adopt a separate structure. The sliding connection structure between the non-sliding part and the sliding part is set on the inner and outer connecting blocks, which are part of the separate structure. The inner and outer connecting blocks can be replaced in time after wear, thus reducing maintenance costs. Attached Figure Description
[0035] Figure 1 This is a front view of one embodiment of the integrated coal mining machine with coal mining and drilling functions; Figure 2 This is a schematic diagram showing the composition of the auxiliary platform and its connection relationship with the fuselage; Figure 3 This is a top-view layout diagram of the components of the auxiliary platform; Figure 4 This is a front view layout diagram of each component of the auxiliary platform; Figure 5 This is a schematic diagram of one embodiment of the drilling rig system; Figure 6 for Figure 5 Top view of the drilling rig system shown; Figure 7 for Figure 5 Right view of the drilling rig system shown (connecting rods not shown); Figure 8 for Figure 5 , 6 A schematic diagram of the structure of the drilling rig track described in the figure; Figure 9 for Figure 5 , 6 The schematic diagram of the drilling rig shown in the image (the push cylinder is in the retracted state); Figure 10 This is a schematic diagram of the assembly structure of the drilling rig power head and the power head fixing plate; Figure 11This is a right view of the power head fixing plate; Figure 12 for Figure 11 A schematic diagram of the upper fixing plate in the middle; Figure 13 for Figure 11 A schematic diagram of the structure of the lower fixing plate; Figure 14 This is a schematic diagram of the structure of the top protection device; Figure 15 for Figure 14 A cross-sectional view of the support described in the text; Figure 16 This is a schematic diagram of the floating connection structure; Figure 17 This is a schematic diagram of the structure of the mobile platform; Figure 18 for Figure 17 A top view of the mobile platform shown; Figure 19 A top view showing multiple mobile platforms moving forward on top of the coal mining machine; Figure 20 This is a front view of one embodiment of the sliding cutting system; Figure 21 for Figure 20 Top view of the sliding cutting system shown (sliding part in rear position); Figure 22 for Figure 20 A schematic diagram of the non-slip portion in the middle; Figure 23 for Figure 20 A schematic diagram of the sliding part in the middle; Figure 24 A schematic diagram showing the relative positions of the cutting system and the conveyor during coal mining operations using a coal mining machine equipped with a sliding cutting system; Figure 25 This is a schematic diagram of the three-machine coordination state involving the integrated coal mining machine with coal mining and drilling functions (top protection plate deployed, moving platform moved forward). Figure 26 This is a schematic diagram of the three-machine coordination state involving the integrated coal mining machine with coal mining and drilling functions (top protection plate retracted, moving platform moved backward).
[0036] Figure label: 1. Sliding cutting system; 101. Machine body connecting lug; 102. Height adjustment cylinder connecting lug; 103. Cutting motor; 104. Cutting transmission system; 105. Drum; 11. Non-sliding section; 111. Upper rail; 1111. Top surface of rail; 1112. Inner surface of rail; 1113. Outer surface of rail; 1114. Bottom surface of rail; 112. Lower rail; 12. Sliding part; 121. Upper track groove; 1211. Top surface of the groove; 1212. Inner side surface of the groove; 1213. Outer side surface of the groove; 1214. Bottom surface of the groove; 122. Lower track groove; 13. Sliding cylinder; 14. Transition frame; 15. Inner connecting block; 16. Outer connecting block; 17. Boom; 2. Fuselage; 21. Left towing box; 22. Middle box; 23. Right towing box; 3. Auxiliary platform; 31. Platform housing; 32. Drilling rig pump station; 321. Pump motor; 322. Pump; 323. Oil tank; 324. Valve assembly; 33. Branch control box; 331. Main incoming terminal; 332. Pump station wiring terminal; 333. Coal mining machine wiring terminal; 334. Pump station line-end switch; 335. Coal mining machine line-end switch; 5. Moving platform; 51. Left platform; 52. Right platform; 53. Platform connecting assembly; 54. Outer end guide bar; 55. Spacer guide bar; 56. Moving hydraulic cylinder; 61. Support column; 610. Pressure plate; 611. Base plate; 612. Locating pin; 613. Support base; 614. Left and right panels; 6141. Notch; 615. Rib plate; 6151. Lower rib plate; 6152. Upper rib plate; 617. Front and rear uprights; 618. Rack; 619. Support cylinder; 62. Top guard plate; 6201, 6202. Two adjacent top guard plates; 624. Floating connection structure; 6241. Connecting pin; 6242. Bolt; 6243. Connecting washer; 6244. Anti-loosening washer; 6245. Nut; 6246. Radial clearance; 6247. Axial clearance; 625. Safety bar; 626. Safety chain; 7. Drilling rig platform; 71. Drill rod box; 74. Connecting rod; 8. Drilling rig; 81. Drilling rig track; 811. Front mounting seat of track; 812. Guide rod; 813. Reinforcing plate; 814. Limiting plate; 815. Rear mounting seat of push cylinder; 816. Rear mounting seat of track; 82. Drilling rig power head; 821. Power head fixing plate; 8211. Upper fixing plate; 8212. Lower fixing plate; 8213. Rear connecting plate; 8214. Front connecting seat of push cylinder; 822. Drive unit; 823. Reducer; 824. Drill rod connection; 83. Push cylinder; 84. Drill rod; 01. Coal mining machine; 02. Conveyor; 03. Hydraulic support; 04. Working space; 05. Coal face. Detailed Implementation
[0037] like Figure 1-26As shown, this invention discloses an integrated coal mining machine (hereinafter referred to as an integrated coal mining machine) with coal mining and drilling functions, including a double-rocker coal mining machine 01 and multiple drilling systems installed on the top surface of the coal mining machine. The drilling systems are used to drill holes in the coal face, enabling the integrated coal mining machine to achieve dual functions of coal mining and drilling. All drilling rigs 8 of the drilling systems are arranged at intervals along the length of the machine body, with the power head 82 of each drilling rig pointing towards the coal face side of the coal mining machine. The drilling rigs are used to drill holes in the coal face. By installing the drilling rigs on the top surface of the coal mining machine, the drilling rigs can move with the coal mining machine without manual relocation, greatly reducing labor intensity, improving drilling efficiency, and enhancing safety.
[0038] The coal mining machine body 2 includes a left traction box 21, a middle box 22, a right traction box 23, and an auxiliary platform 3. The left traction box, middle box, and right traction box are arranged from left to right. The auxiliary platform is detachably and fixedly connected between the middle box and the left traction box or between the middle box and the right traction box. Correspondingly, the middle box is directly connected to the right traction box or the left traction box. The left traction box, middle box, and right traction box all adopt existing structures. By adding the auxiliary platform, the length of the machine body is increased, providing more ample installation space for setting up multiple drilling systems on the top surface of the machine body. The auxiliary platform includes a platform box 31 and a drilling pump station 32 and a branch control box 33 installed in the platform box. The branch control box is equipped with a main incoming terminal 331, a pump station terminal 332, a coal mining machine terminal 333, a pump station terminal switch 334 for controlling the circuit connection between the main incoming terminal and the pump station terminal, and a coal mining machine terminal switch 335 for controlling the circuit connection between the main incoming terminal and the coal mining machine terminal. The drilling rig pump station provides the hydraulic power source for the drilling rig system. The pump station includes a pump motor 321, a pump 322, an oil tank 323, and a valve assembly 324. The pump motor drives the pump, sending oil from the tank through the valve assembly to the hydraulic actuators of the drilling rig system. The pump station's wiring terminals connect to the power input of the drilling rig pump station, specifically the power input of the pump motor. The branch control box enables unified power access and separate output for the coal mining machine and the drilling rig system, while simultaneously controlling and protecting the drilling rig pump station. Multiple drilling rig systems are uniformly controlled and electrically driven by the auxiliary platform, allowing multiple rigs to operate in parallel, significantly improving drilling efficiency.
[0039] The pump station line-end switch and the coal mining machine line-end switch adopt mechanical interlocking switches, which realize the single power supply of the drilling rig pump station or the coal mining machine through mechanical means (they cannot be powered on at the same time, but can be locked at the same time) to ensure the safety of personnel operation.
[0040] like Figure 5-13As shown, the drilling rig system also includes a drilling platform 7 and a connecting rod 74. The drilling rig also includes a power head fixing plate 821, a drilling track 81, and a pushing cylinder 83. The front end of the drilling track is hinged to the drilling platform, and the rear end of the drilling track is hinged to the rear end of the connecting rod. The front end of the connecting rod is hinged to the drilling platform. The drilling platform, drilling track, and connecting rod form a rocker mechanism. The drilling power head is mounted on the power head fixing plate, which is slidably connected to the drilling track. The cylinder body of the pushing cylinder is fixedly mounted on the rear end of the drilling track. The extended end of the cylinder rod of the pushing cylinder is hinged forward to the power head fixing plate. The power head fixing plate can move back and forth along the drilling track under the extension and retraction action of the pushing cylinder, with a travel distance of Δ. The pushing cylinder can push the drilling power head and the power head fixing plate to precise positioning and can provide a large and rapid pushing force. The drilling platform is mounted on the top surface of the coal mining machine. The drilling pump station provides a hydraulic power source for the pushing cylinder.
[0041] The connecting rod is either an adjustable-length connecting rod or a hydraulic cylinder, with the connecting rod inclined at the front and higher at the rear. The adjustable-length connecting rod may include a sleeve and a piston rod that slides within the sleeve. The sleeve has multiple radial pin holes spaced along its length, referred to as multi-position pin holes. The piston rod has one or more radial pin holes. The sleeve and piston rod are fixed together by a connecting rod pin inserted through one of their respective radial pin holes. Changing the radial pin holes connected to the connecting rod pin will change the length of the connecting rod. The adjustable connecting rod allows for graded adjustment of the connecting rod length, while the hydraulic cylinder allows for continuous adjustment of the connecting rod length.
[0042] The connecting rod and the drilling platform together support the drilling rig. Changing the length of the connecting rod allows for easy adjustment of the vertical deflection angle of the drilling rig's power head.
[0043] The drilling rig track may include a track frame consisting of a left guide rod, a right guide rod (collectively referred to as guide rods 812), and multiple reinforcing plates 813 connected between the left and right guide rods and spaced apart along the length of the guide rods. It also includes a front track mounting seat 811, a limiting plate 814, a rear mounting seat 815 for the push cylinder, and a rear track mounting seat 816, arranged sequentially from front to back on the track frame. The front track mounting seat is located at the front end of the track frame, and the rear track mounting seat is located at the rear end of the track frame. The front end of the drilling rig track is hinged to the drilling platform via the front track mounting seat, and the rear end of the drilling rig track is hinged to the rear end of the connecting rod via the rear track mounting seat. The cylinder body of the push cylinder is fixedly mounted on the track frame via the rear track mounting seat. The position of the limiting plate determines the rear limit position of the drilling rig power head. The small distance between the left and right guide rods, combined with the effect of the reinforcing plates, gives the track frame good rigidity.
[0044] The power head fixing plate includes an upper fixing plate 8211, a lower fixing plate 8212, and a rear connecting plate 8213. The upper and lower fixing plates are joined and fixed together to form two opposing arc-shaped cylindrical sliding grooves. The power head fixing plate is slidably connected to the left and right guide rods on the drilling rig track via these arc-shaped cylindrical sliding grooves. The power head fixing plate, with its detachable upper and lower structure, greatly improves assembly convenience, maintains a simple and practical drilling system manufacturing process, and reduces the production cost of the drilling system. The rear connecting plate is located behind the upper and lower fixing plates, and the extended end of the piston rod of the push cylinder is hinged to the rear connecting plate. Near the rear end of the rear connecting plate, a front connecting seat 8214 for the push cylinder is provided, and the extended end of the piston rod of the push cylinder is hinged to the front connecting seat.
[0045] The drilling rig power head includes a drive device 822, a reducer 823, and a drill rod connection 824 connected in sequence. The drive device is usually a hydraulic motor, and the reducer can be a planetary reduction mechanism. Both the input and output ends of the reducer are provided with radial positioning structures to facilitate coaxial connection with the output shaft of the drive device and the drill rod connection, respectively, and to transmit power. The output end of the drill rod connection is set as a square column structure with radial pin holes, which is used to insert and cooperate with the axial square hole structure with radial pin holes at the rear end of the drill rod to achieve a reliable connection with the drill rod.
[0046] Furthermore, the front of the drilling platform is equipped with a drill rod box 71 to accommodate drill rods 84. The drill rod box is an important component of the drilling platform. A platform slewing connector 72 is located at the top front edge of the drill rod box, through which the front end of the drilling rig track is hinged to the drilling platform. A connecting rod mounting seat 73 is located at the rear root of the rear side plate of the drill rod box, through which the front end of the connecting rod is hinged to the drilling platform. This arrangement positions the drill rod box below the front of the drilling rig, with the opening facing upwards, facilitating the loading and unloading of drill rods without requiring personnel to move, reducing auxiliary time and improving drilling efficiency.
[0047] The top edge of the drill pipe box is preferably inclined at the front and lower at the back.
[0048] The integrated coal mining machine with coal mining and drilling functions also includes multiple roof protection devices arranged horizontally, which are used to protect the top surface of the machine body and the drilling system. Figure 14-16As shown in the figure, the roof protection device includes a top protection plate 62, a support column 61, and a support oil cylinder 619. The support column is fixed on the top surface of the fuselage. The rear edge of the top protection plate is hinged on the rear top end of the support column. One end of the support oil cylinder is hinged on the support column, and the other end is hinged on the top protection plate. The top protection plate opens and closes and flips up and down with its own rear edge as the axis under the driving of the telescopic movement of the support oil cylinder. Whether the top protection plate is in the upward unfolded state or the downward retracted state, it covers the support column and the drilling rig system. When drilling, the top protection plate unfolds upward, and when coal mining, the top protection plate retracts to protect the drilling rig system, which has good flexibility and reliability. In the use state, the front end of the top protection plate is close to the coal wall 05, and the rear end is far from the coal wall. The top protection plate can make full use of the surplus space under the top beam of the medium-thick coal seam mining support to open and close and flip. By setting the top protection plate, the coal material that may fall from the coal wall is blocked, which is equivalent to creating a safe space required for the working face drilling operation and the maintenance operation of the drilling rig system above the fuselage and below the top protection plate. The docking joints between the top protection plates of two adjacent roof protection devices are connected by multiple connection structures arranged at intervals in the front and rear directions. It can be seen that the roof protection device has scalability in the left-right direction, so it can meet the protection needs when a larger drilling rig group operates synchronously. The drilling rig pump station can also provide a hydraulic power source for the roof protection device.
[0049] Preferably, a gas detector is suspended at the front edge of the top protection plate, which can perform close-range real-time gas detection during drilling and provide safety guarantee for the drilling operation.
[0050] The support column preferably adopts a flat and thin frame-type steel structure in the left-right direction, which can improve the support connection strength. When set on the top surface of the fuselage, the support column extends in the front and rear directions and is arranged in the same front and rear direction as the coal mining machine. Further, the hinge points of the top protection plate with the support column and the support oil cylinder are preferably located in the middle of the top protection plate in the left-right direction, so that the center of gravity of the top protection plate and the position of the support point are basically in the same vertical plane, which is beneficial to improving the safety of the support. The top protection plate extends outward to the left and right sides of the support column. The top protection plate and the support column are preferably left-right symmetric structures.
[0051] The support column includes a bottom plate 611 extending in the front and rear directions, and left and right panels 614 and front and rear vertical plates 617 vertically fixed on the bottom plate. The front and rear vertical plates are located between the left and right panels and close to the rear end of the bottom plate. The front and rear vertical plates and the left and right panels enclose a hollow column with a rectangular cross-section. There are also rib plates 615 connected between the left and right panels. The support oil cylinder is located between the left and right panels, and the end where the support oil cylinder is hinged to the support column is hinged on the left and right panels. The space enclosed by the bottom plate and the left and right panels is a maintenance space, which can be used to install a series of oil cylinders, pipelines, rods, etc. supporting the top protection plate. The space on the left and right sides of the support column under the top protection plate is an operation space 04, which is used to install the drilling rig system and perform drilling operations.
[0052] The bottom surface of the base plate is provided with multiple support positioning pin holes spaced at intervals, which are used for pin positioning of the base plate during support installation. The positioning pins 612 used for positioning between the base plate and the top of the coal mining machine are installed in the support positioning pin holes.
[0053] The top guard plate includes a front part and a rear part, which form an angle with the opening facing downwards. Each of the left and right panels has a flat top edge, a sloping top edge (lower at the front and higher at the rear), and a front vertical edge extending sequentially from back to front. When the top guard plate is in a downward-folded state, its front and rear parts are respectively fitted and fastened to the front vertical edge and the sloping top edge. A recessed notch 6141 can be provided in the middle of the sloping top edge to facilitate the disassembly and replacement of cylinders, pipelines, rods, etc., installed in the maintenance space from the outside of the support column. It can also be used as a window to view the status of the aforementioned equipment from a distance. In the embodiment shown in the attached figure, the edge of the notch consists of a quarter-circle arc located in the middle and tangents on both sides of the arc in horizontal and vertical directions, respectively.
[0054] The stiffening ribs may include an upper stiffening rib 6152 and a lower stiffening rib 6151. The upper stiffening rib extends forward sequentially along the flat top edge and the sloping top edge until it partially overlaps with the rear edge of the notch. The upper stiffening rib closes the top surface of the column, and a support seat 613 can be installed above the closed portion for hinged connection with the rear edge of the top guard plate. The lower stiffening rib extends backward and downward from the junction of the sloping top edge and the front vertical edge to below the front part of the notch. Ideally, the lowest point should maintain sufficient distance between it and the bottom edge of the left and right panels. The lower stiffening rib provides better overall strength to the column. The lower part of the supporting cylinder in the front-rear direction is located between the upper and lower stiffening ribs.
[0055] The top protection device also includes a safety bar 625 and a safety chain 626. A rack 618 extends and is fixedly laid out between the left and right panels on the base plate. The upper end of the safety bar is hinged to the front edge of the top protection plate, and the lower end is free. One end of the safety chain is connected to the lower part of the safety bar, and the other end passes through the column and hangs behind it. The position of the lower end of the safety bar can be controlled by pulling and releasing the safety chain. When the top protection plate is in the upward unfolded state, the lower end of the safety bar is engaged between two adjacent teeth on the rack, providing auxiliary support for the top protection plate, equivalent to secondary protection, avoiding safety hazards caused by malfunctions in the support cylinder (such as hydraulic problems). In this state, the top protection plate can be unfolded in one direction. The safety bar is preferably located in front of the lower stiffener plate for better stress distribution when supporting the top protection plate. Before lowering the top protection plate to the downward retracted state, the lower end of the safety bar needs to be disengaged from the rack by pulling the safety chain. Then, during the downward flipping of the top protection plate, the safety bar is gradually laid flat on the rack. Because the safety chain is located behind the column, the structure ensures that the workers are positioned on the goaf side of the coal mining machine, effectively providing triple protection. The lower end of the safety bar should ideally be wedge-shaped, wider at the top and narrower at the bottom, with rounded corners at the head. A chain hole can be provided at the lower part of the safety bar, where the end of the safety chain connects to the safety bar.
[0056] The preferred connection structure is a floating connection structure 624. The floating connection structure includes a connecting pin 6241 and a connecting pad 6243. One end of the connecting pin has a radially protruding flange. During connection, the connecting pin is inserted from one side into a pair of connecting holes at the mating point between two adjacent top guard plates 6201 and 6202. The flange acts as an axial limit on the insertion side, and the connecting pad rests against the other end face of the connecting pin, acting as an axial limit on the opposite side of the insertion side. The adjacent top guard plates are connected together by passing bolts 6242 through the connecting pin and connecting pad, and by fitting anti-loosening washers 6244 and screw nuts 6245 onto the bolts. A radial gap 6246 exists between the connecting holes and the connecting pin. The connecting pin and the connecting pad form a radially outward double-sided annular groove. The distance from the inner side of the flange to the connecting pad, i.e., the groove width of the double-sided annular groove, is greater than the sum of the thicknesses at the mating point between the two adjacent top guard plates. Therefore, an axial gap 6247 exists between the mating point between the two adjacent top guard plates 6201 and 6202 and the double-sided annular groove. The two adjacent top guard plates 6201 and 6202 can move axially and radially relative to the double-sided annular groove, thereby achieving a "floating" effect. This allows for larger installation errors and larger flipping and repositioning errors of the top guard plates, reducing the installation difficulty of the top guard plates.
[0057] The integrated coal mining machine with coal mining and drilling functions may also include multiple mobile platforms 5, such as... Figure 17-19 As shown, the mobile platform includes a left platform 51, a right platform 52, a platform connecting component 53, and a left outer guide strip (see...). Figure 17 , 18The system includes a right-side outer guide bar (whose structure can be symmetrical to the left-side outer guide bar) and a moving cylinder 56. The moving platform and the top protection device are configured one-to-one. The left and right outer guide bars extend forward and backward and are respectively arranged on the left and right sides of the corresponding support pillars and fixed to the top surface of the machine body. The lower left and right sides of the support pillars are respectively provided with forward and backward extending left-side inner guide structures and right-side inner guide structures. The left and right edges of the left platform slide in conjunction with the left-side outer guide bar and the left-side inner guide structure, respectively. The left and right edges of the right platform slide in conjunction with the right-side inner guide structure and the right-side outer guide bar, respectively. The rear ends of the left and right platforms are connected together by a platform connecting assembly located behind the corresponding support pillar. The front end of the corresponding moving cylinder is hinged to the support pillar, and the rear end passes through the corresponding support pillar and is hinged to the platform connecting assembly. The left and right platforms slide back and forth under the extension and retraction of the moving cylinders. When the moving cylinders retract, the platform connecting components move forward closer to the support pillars, and the front ends of the left and right platforms extend forward beyond the front ends of the support pillars. When the moving cylinders extend, the left and right platforms move backward. The drilling system is installed on part or all of the left and right platforms, forming a working space 04 between the left and right platforms and the corresponding top protection plates. When the left and right platforms move forward, the drilling system can get closer to the coal face 05, making drilling operations on the coal face more convenient. After drilling is completed, the drilling system moves backward with the left and right platforms without hindering the coal mining machine.
[0058] The base plate of the support column can extend beyond the left panel and the right panel by a certain distance, respectively. A left pressure plate and a right pressure plate (collectively referred to as pressure plate 610) are installed on the top surface of the extended portion. The left and right pressure plates cantilever beyond the base plate to the left and right, respectively. The concave corner structures formed by the bottom surfaces of the left and right pressure plates with the left and right sides of the base plate respectively constitute the left inner guide structure and the right inner guide structure. In every two adjacent moving platforms, the right outer guide strip of the left moving platform and the left outer guide strip of the right moving platform are integrated into a spaced guide strip 55. The left outer guide strip of the leftmost moving platform and the right outer guide strip of the rightmost moving platform are collectively referred to as the outer end guide strip 54.
[0059] In operation, the integrated mining and drilling coal mining machine, conveyor 02, and hydraulic support 03 maintain a three-machine coordination, positioned behind the coal face 05. The top beam of the hydraulic support provides safety protection for the other equipment. Coal mining by the mining machine and drilling by the drilling system can be performed alternately. The relocation of the drilling system is achieved by moving the coal mining machine, which reduces manual labor intensity, improves mining efficiency, and enhances safety.
[0060] The cutting system of the coal mining machine preferably adopts a sliding cutting system 1, such as... Figure 20-24As shown, the sliding cutting system includes a sliding part 12, a non-sliding part 11, and a sliding cylinder 13. The sliding part and the non-sliding part are slidably connected, one on the left and one on the right. The two ends of the sliding cylinder are respectively hinged to the sliding part and the non-sliding part. Under the action of the sliding cylinder, the sliding part can move back and forth relative to the non-sliding part. The non-sliding part is provided with a body connecting lug 101 and a height adjustment cylinder connecting lug 102 for hinged connection with the body 2 of the coal mining machine and the height adjustment cylinder. The axes of the connecting lug holes on the body connecting lug and the height adjustment cylinder connecting lug both extend back and forth. The sliding part is provided with a cutting motor 103, a cutting transmission system 104, and a drum 105 connected in sequence, with the cutting motor being closest to the non-sliding part.
[0061] The structure and relative position of the body connecting lug and the height adjustment cylinder connecting lug on the non-sliding part are the same as those on the existing coal mining machine rocker arm. Therefore, the integrated coal mining machine with coal mining and drilling functions can be seamlessly replaced with the existing cutting system.
[0062] The non-sliding part is provided with a pair of large-span tracks (upper track 111 and lower track 112 in the attached drawing) or track grooves arranged vertically, and correspondingly, the sliding part is provided with a pair of large-span track grooves (upper track groove 121 and lower track groove 122 in the attached drawing) or tracks arranged vertically. The sliding part and the non-sliding part are slidably connected through the cooperation of the tracks and track grooves. The arrangement of the paired large-span tracks and track grooves can reduce the sliding contact force and improve the sliding reliability.
[0063] The track groove adopts a T-shaped groove. All surfaces of the track groove, including the top surface 1211, inner side surface 1212, outer side surface 1213, and bottom surface 1214, maintain a sliding fit with the corresponding surfaces of the track, including the top surface 1111, inner side surface 1112, outer side surface 1113, and bottom surface 1114. Since all surfaces in four directions (up, down, left, and right) are in contact, with one or two pairs of surfaces in each direction, the contact pressure is greatly reduced, and wear at the sliding fit is decreased. Therefore, this helps to extend the lifespan of the integrated coal mining machine with both mining and drilling functions.
[0064] A first groove-shaped structure extending forward and backward is provided between a pair of tracks or between a pair of track grooves in the non-sliding part, and a second groove-shaped structure extending forward and backward is provided between a pair of track grooves or between a pair of tracks in the sliding part. The first groove-shaped structure and the second groove-shaped structure form a cylinder mounting cavity. The sliding cylinder is set in the cylinder mounting cavity, which has good protection and is compact in structure and saves installation space.
[0065] Furthermore, the non-sliding part preferably includes a transition frame 14 and an inner connecting block 15 that are detachably and fixedly connected together on the left and right sides. The sliding part preferably includes a boom 17 and an outer connecting block 16 that are detachably and fixedly connected together on the left and right sides. The transition frame and the inner connecting block, and the boom and the outer connecting block are positioned by a first positioning structure and a second positioning structure, respectively. The sliding connection between the sliding part and the non-sliding part is achieved through the sliding connection between the inner and outer connecting blocks. The non-sliding part and the sliding part adopt the above-mentioned split structure, which allows for timely replacement of the inner and outer connecting blocks after wear, thus reducing maintenance costs.
[0066] Both the first and second positioning structures are composite positioning structures combining a stop and a pin, and the specifications and dimensions of the first and second positioning structures are preferably the same. Furthermore, when a concave or convex stop is used on the transition frame, a corresponding convex or concave stop is preferably used on the boom, so that the transition frame and the boom can be directly positioned and connected, facilitating the assembly into a coal mining machine cutting system with an existing universal structure.
[0067] When the sliding cutting system of this invention is used on a coal mining machine, it can be roughly divided into two working positions according to the different front and rear positions of the sliding part relative to the non-sliding part: sliding part in front and sliding part in rear. During normal coal mining, the sliding part is in front, similar to a traditional cutting system, but superior to the traditional cutting system in that: for coal mining machines using traditional cutting systems, when matched with different specifications of conveyors, the distance between the drum and the conveyor may be too large. However, for coal mining machines using the sliding cutting system described above, appropriately moving the sliding part backward can reduce the distance between the drum and the conveyor, improving the loading effect. After the conveyor moves forward with the coal mining machine, the cutting system with the sliding part in rear is located above the conveyor, allowing for convenient traction and movement above the moved conveyor without being affected by the coal face. Therefore, when used in a mining and drilling integrated machine, the conveyor can be moved normally during each coal mining stroke, eliminating the need to reserve passage space for the drum that stops rotating during drilling operations, greatly facilitating gas drilling and drainage operations at the working face and improving mining efficiency.
[0068] The auxiliary platform, drilling system and roof support device of the present invention can be dismantled, and the sliding cutting system can be replaced with an existing cutting system. After the corresponding dismantling and replacement, the integrated coal mining machine can be restored to a traditional double-arm coal mining machine, and the equipment has good versatility and interchangeability.
[0069] In this article, "left, right, front, back, up, down" are used to describe related structures to express the relative positional relationship between the corresponding structures, not to limit their absolute orientation. The left and right are borrowed from the traction direction when the coal mining machine is working, and the front and back are borrowed from the direction perpendicular to the coal wall, where front is the direction pointing towards the coal wall.
Claims
1. An integrated coal mining machine with coal mining and drilling functions, characterized in that: The system includes a double-arm coal mining machine and multiple drilling systems installed on the top surface of the machine body. All drilling rigs are spaced apart along the length of the machine body, with the power head of each rig pointing towards the coal face. The machine body includes a left traction box, a middle box, a right traction box, and an auxiliary platform. The left, middle, and right traction boxes are arranged from left to right. The auxiliary platform is connected between the middle box and the left traction box, or between the middle box and the right traction box. Correspondingly, the middle box is directly connected to the right or left traction box. The auxiliary platform includes a platform housing and a drilling pump station and a branch control box housed within the platform housing. The branch control box has a main incoming terminal, a pump station terminal, a coal mining machine terminal, and a pump station terminal switch for controlling the circuit connection between the main incoming terminal and the pump station terminal, as well as a coal mining machine terminal switch for controlling the circuit connection between the main incoming terminal and the coal mining machine terminal. The drilling pump station provides a hydraulic power source for the drilling system, and the pump station terminal is connected to the power input terminal of the drilling pump station.
2. The integrated coal mining machine with coal mining and drilling functions as described in claim 1, characterized in that: The pump station line-end switch and the coal mining machine line-end switch are mechanically interlocked.
3. The integrated coal mining machine with coal mining and drilling functions as described in claim 2, characterized in that: The drilling rig system also includes a drilling platform and connecting rods. The drilling rig also includes a power head fixing plate, a drilling rig track, and a pushing cylinder. The front end of the drilling rig track is hinged to the drilling platform, and the rear end of the drilling rig track is hinged to the rear end of the connecting rod. The front end of the connecting rod is hinged to the drilling platform. The drilling power head is mounted on the power head fixing plate, which is slidably connected to the drilling rig track. The cylinder body of the pushing cylinder is fixedly mounted on the rear end of the drilling track, and the extended end of the cylinder rod of the pushing cylinder is hinged forward to the power head fixing plate. The power head fixing plate can move back and forth along the drilling track under the extension and retraction action of the pushing cylinder. The drilling platform is mounted on the top surface of the coal mining machine. The connecting rod is an adjustable length connecting rod or a cylinder. The drilling rig pump station provides a hydraulic power source for the pushing cylinder.
4. The integrated coal mining machine with coal mining and drilling functions as described in claim 3, characterized in that: The power head fixing plate includes an upper fixing plate, a lower fixing plate, and a rear connecting plate. After the upper and lower fixing plates are fixed together, they form two arc-shaped cylindrical sliding grooves with opposite openings on the left and right sides. The power head fixing plate is slidably connected to the left and right guide rods on the drilling rig track through the arc-shaped cylindrical sliding grooves. The rear connecting plate is located behind the upper and lower fixing plates, and the cylinder rod extension end of the push cylinder is hinged to the rear connecting plate.
5. The integrated coal mining machine with coal mining and drilling functions as described in claim 3 or 4, characterized in that: The drilling platform is equipped with a drill rod box at the front. The front end of the drilling rig track is hinged to the front edge of the top of the drill rod box, and the front end of the connecting rod is hinged to the rear root of the rear side plate of the drill rod box.
6. The integrated coal mining machine with coal mining and drilling functions as described in claim 1, 2, 3, 4 or 5, characterized in that: It also includes multiple top protection devices arranged side by side. Each top protection device includes a top protection plate, a support column, and a support cylinder. The support column is fixed to the top surface of the machine body. The rear edge of the top protection plate is hinged to the rear top of the support column. One end of the support cylinder is hinged to the support column, and the other end is hinged to the top protection plate. Driven by the extension and retraction of the support cylinder, the top protection plate opens and closes and flips up and down with its own rear edge as the axis. Whether the top protection plate is in the upward unfolded state or the downward retracted state, it covers the support column and the drilling system. The joints between the top protection plates of two adjacent top protection devices are connected by multiple connecting structures arranged at intervals.
7. The integrated coal mining machine with coal mining and drilling functions as described in claim 6, characterized in that: The support column includes a base plate extending forward and backward, and left and right panels and front and rear uprights vertically fixed on the base plate. The front and rear uprights are located between the left and right panels and close to the rear end of the base plate. The front and rear uprights and the left and right panels form a hollow column. Ribs are also connected between the left and right panels. The support cylinder is located between the left and right panels, and the end of the support cylinder that is hinged to the support column is hinged to the left and right panels. The top guard plate includes a front part and a rear part, which form an angle with the opening facing downward. Each of the left and right panels has a flat top edge, a sloping top edge that is lower in the front and higher in the back, and a front vertical edge that are connected sequentially from back to front. When the top guard plate is in a downward-folding state, its front and rear parts are respectively attached to the front vertical edge and the sloping top edge. The middle of the sloping top edge has a recessed notch.
8. The integrated coal mining machine with coal mining and drilling functions as described in claim 7, characterized in that: The top protection device is also equipped with a safety bar and a safety chain. A rack is laid flat and fixed between the left and right panels on the bottom plate. The upper end of the safety bar is hinged to the front edge of the top protection plate, and the lower end of the safety bar is a free end. One end of the safety chain is connected to the lower part of the safety bar, and the other end of the safety chain passes through the column and hangs behind the column. When the top protection plate is in the upward unfolded state, the lower end of the safety bar is locked between two adjacent teeth on the rack.
9. The integrated coal mining machine with coal mining and drilling functions as described in claim 8, characterized in that: The connection structure is a floating connection structure, which includes a connecting pin and a connecting pad. One end of the connecting pin has a radially protruding flange. During connection, the connecting pin is inserted from one side into a pair of connecting holes at the joint between two adjacent top guard plates. The flange acts as an axial limit on the insertion side, and the connecting pad rests against the other end face of the connecting pin as an axial limit on the opposite side of the insertion side. The two adjacent top guard plates are connected together by passing bolts through the connecting pin and the connecting pad, and putting anti-loosening washers and screw nuts on the bolts. There is a radial gap between the connecting holes and the connecting pin. The distance from the inner side of the flange to the connecting pad is greater than the sum of the thicknesses at the joint between the two adjacent top guard plates.
10. The integrated coal mining machine with coal mining and drilling functions as described in claim 6, 7, 8 or 9, characterized in that: It also includes multiple mobile platforms, each comprising a left platform, a right platform, a platform connecting assembly, a left outer guide bar, a right outer guide bar, and a moving hydraulic cylinder. The hinge points of the top guard plate, the support column, and the supporting hydraulic cylinder are all located in the middle of the top guard plate in the left-right direction. The top guard plate extends outward to the left and right sides of the support column. The mobile platform and the top guard device are set one-to-one. The left and right outer guide bars extend forward and backward and are respectively arranged on the left and right sides of the corresponding support column and fixed to the top surface of the machine body. The lower left and right sides of the support column are respectively provided with forward and backward extending left inner guide structures and right inner guide structures. The left and right edges of the left platform slide in conjunction with the left outer guide bar and the left inner guide structure, respectively. The left and right edges of the right platform slide in conjunction with the right inner guide structure and the right outer guide strip, respectively. The rear ends of the left and right platforms are connected together by a platform connecting assembly, which is located behind the corresponding support column. The front end of the corresponding moving cylinder is hinged to the support column, and the rear end passes through the corresponding support column and is hinged to the platform connecting assembly. The left and right platforms slide back and forth under the extension and retraction of the moving cylinder. When the moving cylinder retracts, the platform connecting assembly moves forward and closer to the support column, and the front ends of the left and right platforms extend forward beyond the front end of the support column. When the moving cylinder extends, the left and right platforms move backward. The drilling system is installed on part or all of the left and right platforms, and a working space is formed between the left and right platforms and the corresponding top protection plate.
11. The integrated coal mining machine with coal mining and drilling functions as described in claims 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, characterized in that: The cutting system of the coal mining machine includes a sliding part, a non-sliding part, and a sliding cylinder. The sliding part and the non-sliding part are slidably connected to each other on the left and right. The two ends of the sliding cylinder are respectively hinged to the sliding part and the non-sliding part. Under the action of the sliding cylinder, the sliding part can move back and forth relative to the non-sliding part. The non-sliding part is provided with a body connecting lug and a height adjustment cylinder connecting lug. The axes of the connecting lug holes on the body connecting lug and the height adjustment cylinder connecting lug both extend back and forth. The sliding part is provided with a cutting motor, a cutting transmission system, and a drum that are connected in sequence, with the cutting motor being closest to the non-sliding part.