Roof cutting and pressure relief device for coal mine tunnel

Abstract

The invention relates to the technical field of coal mine tunnel roof cutting and pressure relief, and discloses a coal mine tunnel roof cutting and pressure relief device which comprises a fixed mounting base, a protective bottom plate is fixedly connected to the bottom end of the fixed mounting base, a plurality of universal wheels are fixedly connected to the bottom end of the protective bottom plate, and a supporting protective column is fixedly connected to the top end of the fixed mounting base. A group of sewage tanks which are symmetrical front and back are formed in the opposite side, away from the supporting protection column, of the fixed mounting base, a leakage plate is fixedly connected to the top end of each sewage tank, and a supporting plate is fixedly connected to the opposite side, away from the sewage tanks, of the fixed mounting base. And meanwhile, a certain positioning function can be achieved on a connecting plate through an A-shaped connecting frame, a positioning sliding block and a vertical guide sliding rail, so that the stability of the protective lifting seat during movement is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine tunnel roof cutting and pressure relief, in particular to a coal mine tunnel roof cutting and pressure relief device. Background Art

[0002] The problem of hard protective roof has always been one of the main factors causing strong mine pressure in the mining field. As the working face advances, a triangular hanging plate appears on the hard protective roof within the near-field basic roof range on the side of the mining roadway. However, after the triangular hanging plate is suspended over a large area, it squeezes the mining roadway and coal pillars in the goaf, causing serious deformation and damage of the roadway and coal pillars, and failure of anchor bolts and cables. When the triangular hanging plate suddenly breaks, it generates an impact load, causing the mining roadway and coal pillars on the side of the goaf to deform and damage sharply, the single pillars to bend, and the anchor bolts and cables to break.

[0003] In the prior art, there is a device for reducing the pressure on a coal mine tunnel roof, as disclosed in the application number CN116927801A, which includes a cavity, a lifting plate, two front round rods spaced left and right, two right round rods spaced front and back, and two left round rods spaced front and back, the bottoms of the front round rods, the right round rods, and the left round rods are all fixed at the top of the cavity, and the front round rods, the right round rods, and the left round rods are all extended in the up and down directions; the lifting plate can move in the space formed by the front round rods, the right round rods, and the left round rods, the lifting plate is a five-pointed star plate structure, the lifting plate is respectively connected to the front round rods, the right round rods, and the left round rods, and a fixing block is fixed at the bottom of the lifting plate.

[0004] However, the above patent will generate a lot of dust during use. At the same time, dry dust will be dispersed to the outside through large gaps, so the dust prevention effect is poor. In addition, the steel structure cutting knife has poor stability during the cutting process, which will cause dust accumulation on the surface of the equipment, affecting the use of the equipment, thereby causing great inconvenience to personnel. Summary of the invention

[0005] The object of the present invention is to provide a coal mine tunnel roof cutting pressure relief device to solve the problems in the prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A coal mine tunnel top cutting and pressure relief device comprises a fixed mounting base, the bottom end of the fixed mounting base is fixedly connected to a protective bottom plate, and the bottom end of the protective bottom plate is fixedly connected to a plurality of universal wheels, the top end of the fixed mounting base is fixedly connected to a supporting and protective column, a group of front-to-rear symmetrical sewage troughs are opened on the opposite side of the fixed mounting base away from the supporting and protective column, and a leakage plate is fixedly connected to the top end of the sewage trough, the fixed mounting base is fixedly connected to a supporting plate on the opposite side away from the sewage trough, and the top end of the support plate is fixedly connected to a main mounting protective connecting column, the main mounting protective connecting column is internally movably connected to a lifting mechanism; the lifting mechanism is internally fixedly connected to a motor 1, and the output end of the motor 1 is fixedly connected to a steel structure cutting knife, the top end of the supporting and protective column is fixedly connected to a dustproof mechanism, the top end of the leakage plate is movably connected to a cleaning mechanism, the internal bottom end of the sewage trough is fixedly connected to a water outlet pipe, and the bottom end of the water outlet pipe extends to the outside of the fixed mounting base.

[0008] Preferably, the lifting mechanism includes motor 2, transmission gear 1, transmission gear 2, a cylindrical fixed seat, a screw, a protective lifting seat, an A-shaped connecting frame, a positioning slider and a vertical guide rail, the output end of motor 2 is fixedly connected to the axis of transmission gear 1, and transmission gear 1 is movably connected to the outer wall of transmission gear 2, the bottom end of transmission gear 2 is rotatably connected to the top end of the cylindrical fixed seat, the screw is threadedly connected to the inside of transmission gear 2, the top end of the screw is fixedly connected to the bottom end of the protective lifting seat, and one side of the A-shaped connecting frame is fixedly connected to the outer wall of the protective lifting seat.

[0009] Preferably, the positioning slider and the vertical guide rail are provided with two groups symmetrical on the left and right, the positioning slider is slidably connected to the outer wall of the vertical guide rail, the outer wall of the positioning slider is respectively fixedly connected to the other side of the A-shaped connecting frame, the vertical guide rail is fixedly connected to the inner wall of the supporting protective column, and the motor 2 is fixedly connected to the bottom outer side of the main installation protective connecting column.

[0010] Preferably, a sliding groove is provided on the outer wall of the main installation protection connecting column, and the transmission gear 1 is meshed with the transmission gear 2 through the sliding groove, the protection lifting seat is slidably connected to the interior of the main installation protection connecting column, and the top sides of the protection lifting seat extend to the outside of the sliding groove and are fixedly connected to the A-shaped connecting frame, the bottom end of the cylindrical fixing seat is fixedly connected to the inner bottom end of the main installation protection connecting column, and the steel structure cutting knife is rotatably connected to the inner top of the protection lifting seat.

[0011] Preferably, the dust-proof mechanism includes a connecting rod, a protective top plate, a collecting plate, a guide rod, a spring, a clean water tank, a water pump and a dust-proof nozzle, the top end of the connecting rod is hinged to the bottom end of the collecting plate, and the collecting plate is slidably connected to the inside of the protective top plate, the collecting plates are provided with two left-right symmetrical ones, the guide rods are provided with two front-back symmetrical ones, and the two ends of the guide rods are respectively movably connected to the inside of one side of the collecting plate, the two ends of the spring are respectively fixedly connected to the inside of one side of the collecting plate, and a collecting groove is provided at the inner bottom end of the collecting plate.

[0012] Preferably, the output end of the cleaning water tank is fixedly connected to the input end of the water pump through a pipe, and the output end of the water pump is fixedly connected to the input end of the dustproof nozzle through a telescopic tube. There are multiple dustproof nozzles, and the dustproof nozzles are fixedly connected to the inner wall of the collecting plate.

[0013] Preferably, the bottom end of the connecting rod is hinged to the top of the A-shaped connecting frame, a card slot is opened on one side of the collecting plate and the protective top plate, and the card slot is adapted to the main mounting protective connecting column, and the clean water tank and the water pump are fixedly connected to the top of the fixed mounting base.

[0014] Preferably, the cleaning mechanism includes an electric movable transmission rod, a cleaning scraper, a connecting push block and a movable transmission rod, the output end of the electric movable transmission rod is fixedly connected to the outer wall of the connecting push block, one end of the movable transmission rod is hinged to the outer wall of the connecting push block, and the other end of the movable transmission rod is hinged to the inner wall of the cleaning scraper.

[0015] Preferably, a groove is provided at the top of the fixed mounting base, and the electrically movable transmission rod is fixedly connected to the inside of the groove, the bottom end of the connecting push block is slidably connected to the inside of the groove, and the cleaning scraper is provided with two groups that are symmetrical on the left and right.

[0016] Preferably, one side of the cleaning scraper is slidably connected to the top of the support plate, and the cleaning scraper is movably connected to the top of the drain plate.

[0017] Beneficial effects of the present invention:

[0018] 1. The present invention drives the screw rod to move upward by rotating the transmission gear 2, and at this time drives the steel structure cutting knife to rise to cut the coal mine tunnel. At the same time, the A-shaped connecting frame, the positioning slider and the vertical guide rail can play a certain positioning function on the connecting plate, thereby improving the stability of the protective lifting seat during movement. In addition, the screw rod and the transmission gear 1 and the transmission gear 2 can more accurately adjust the rising height, so as to make it more convenient for personnel to operate;

[0019] 2. The present invention can play a certain cooling effect on the steel structure cutting knife through the dustproof mechanism, thereby preventing the steel structure cutting knife from being deformed due to excessive temperature, thereby improving the service life of the steel structure cutting knife. In addition, the guide rod and the spring can assist the collection plate to reset, and the dustproof mechanism can greatly reduce the generation of dust during the processing. At the same time, the sewage inside the collection plate can flow into the sewage tank through the collection tank, so as to be processed uniformly, thereby reducing the difficulty of work for personnel;

[0020] 3. The present invention pushes the cleaning scrapers on both sides away from each other through the movable transmission rod, thereby cleaning the surface of the leak plate and pushing the dust and sewage into the sewage tank, thereby reducing the workload of personnel and preventing dust accumulation from causing damage to equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0024] Figure 3 The present invention Figure 2 A side view structural schematic diagram of;

[0025] Figure 4 It is a schematic diagram of the explosion structure of the dust-proof mechanism of the present invention;

[0026] Figure 5 It is a schematic diagram of the partial explosion structure of the present invention;

[0027] Figure 6 The present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 7 The present invention Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0029] Figure 8 The present invention Figure 4 Schematic diagram of the enlarged structure at point C in the middle.

[0030] 1. Fixed installation base; 2. Protective bottom plate; 3. Universal wheel; 4. Support and protective column; 5. Sewage tank; 6. Leakage plate; 7. Support plate; 8. Main installation protective connecting column; 9. Motor 1; 10. Lifting mechanism; 1001. Motor 2; 1002. Transmission gear 1; 1003. Transmission gear 2; 1004. Cylindrical fixed seat; 1005. Screw; 1006. Protective lifting seat; 1007. A-shaped connecting frame; 1008. Positioning slider; 1009. Vertical guide Slide rail; 11. Steel structure cutting knife; 12. Dust-proof mechanism; 1201. Connecting rod; 1202. Protective top plate; 1203. Collecting plate; 1204. Guide rod; 1205. Spring; 1206. Cleaning water tank; 1207. Water pump; 1208. Dust-proof nozzle; 13. Cleaning mechanism; 1301. Electric movable transmission rod; 1302. Cleaning scraper; 1303. Connecting push block; 1304. Movable transmission rod; 14. Water outlet pipe; 15. Slot; 16. Groove DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] A coal mine tunnel cutting top pressure relief device, such as Figure 1 As shown, it includes a fixed mounting base 1, the bottom end of the fixed mounting base 1 is fixedly connected with a protective bottom plate 2, and the bottom end of the protective bottom plate 2 is fixedly connected with a plurality of universal wheels 3, the top end of the fixed mounting base 1 is fixedly connected with a supporting protective column 4, a group of front-to-rear symmetrical sewage troughs 5 are opened on the opposite side of the fixed mounting base 1 away from the supporting protective column 4, and a leak plate 6 is fixedly connected to the top of the sewage trough 5, the opposite side of the fixed mounting base 1 away from the sewage trough 5 is fixedly connected with a supporting plate 7, and the top end of the supporting plate 7 is fixedly connected with a main mounting protective connecting column 8, and the main mounting protective connecting column 8 is internally movably connected with a lifting mechanism 10; the interior of the lifting mechanism 10 is fixedly connected with a motor 9, and the output end of the motor 9 is fixedly connected with a steel structure cutting knife 11, the top end of the supporting protective column 4 is fixedly connected with a dustproof mechanism 12, the top end of the leak plate 6 is movably connected with a cleaning mechanism 13, the internal bottom end of the sewage trough 5 is fixedly connected with a water outlet pipe 14, and the bottom end of the water outlet pipe 14 extends to the outside of the fixed mounting base 1.

[0033] Firstly, when personnel use the equipment and move the equipment to the position where cutting is required, they can control the lifting structure to drive the steel structure cutting knife 11 to rise. At this time, as the lifting mechanism 10 rises, the dust prevention mechanism 12 will be driven to expand to both sides, thereby increasing the area of ​​dust collection on the collection plate 1203. At the same time, the cleaning mechanism 13 can be controlled to move to push the dust through the leakage plate 6 into the interior of the sewage trough 5, and then the sewage trough 5 is discharged through the outlet pipe 14, so as to facilitate personnel to collect and process the dust in a centralized manner and reduce the difficulty of personnel operation.

[0034] like Figure 2-Figure 5 - Figure 7 As shown, the lifting mechanism 10 includes a motor 2 1001, a transmission gear 1 1002, a transmission gear 2 1003, a cylindrical fixed seat 1004, a screw 1005, a protective lifting seat 1006, an A-shaped connecting frame 1007, a positioning slider 1008 and a vertical guide rail 1009. The output end of the motor 2 1001 is fixedly connected to the axis of the transmission gear 1 1002, and the transmission gear 1 1002 is movably connected to the outer wall of the transmission gear 2 1003. The bottom end of the transmission gear 2 1003 is rotatably connected to the top inside of the cylindrical fixed seat 1004. The screw 1005 is threadedly connected to the inside of the transmission gear 2 1003. The top of the screw 1005 is fixedly connected to the bottom end of the protective lifting seat 1006. One side of the A-shaped connecting frame 1007 is fixedly connected to the outer wall of the protective lifting seat 1006. The positioning slider 1008 and the vertical guide rail 1009 are provided with Two groups are symmetrical on the left and right, and the positioning slider 1008 is slidably connected to the outer wall of the vertical guide slide rail 1009. The outer walls of the positioning slider 1008 are respectively fixedly connected to the other side of the A-shaped connecting frame 1007. The vertical guide slide rail 1009 is fixedly connected to the inner wall of the supporting protective column 4. The motor 2 1001 is fixedly connected to the bottom outer side of the main installation protective connecting column 8. The outer wall of the main installation protective connecting column 8 is provided with a slide groove, and the transmission gear 1 1002 is meshed with the transmission gear 2 1003 through the slide groove. The protective lifting seat 1006 is slidably connected to the inside of the main installation protective connecting column 8, and the top sides of the protective lifting seat 1006 extend to the outside of the slide groove and are fixedly connected to the A-shaped connecting frame 1007. The bottom end of the cylindrical fixed seat 1004 is fixedly connected to the inner bottom end of the main installation protective connecting column 8, and the steel structure cutting knife 11 is rotatably connected to the inner top of the protective lifting seat 1006.

[0035] When the personnel transfer the equipment to the position where cutting is required, they can control the motor 2 1001 to rotate. When the motor 2 1001 rotates, it will drive the transmission gear 2 1003 to rotate through the transmission gear 1 1002. The rotation of the transmission gear 2 1003 will drive the screw 1005 to move upward. At this time, it will drive the steel structure cutting knife 11 to rise and cut the coal mine tunnel. At the same time, the A-shaped connecting frame 1007, the positioning slider 1008 and the vertical guide rail 1009 can play a certain positioning function for the connecting plate, thereby improving the stability of the protective lifting seat 1006 during movement. In addition, the screw 1005 and the transmission gear 1 1002 and the transmission gear 2 1003 can more accurately adjust the rising height, which is more convenient for personnel to operate.

[0036] like Figure 3-Figure 4 - Figure 6 As shown, the dust-proof mechanism 12 includes a connecting rod 1201, a protective top plate 1202, a collecting plate 1203, a guide rod 1204, a spring 1205, a clean water tank 1206, a water pump 1207 and a dust-proof nozzle 1208. The top end of the connecting rod 1201 is hinged to the bottom end of the collecting plate 1203, and the collecting plate 1203 is slidably connected to the inside of the protective top plate 1202. The collecting plate 1203 is provided with two symmetrical left and right, and the guide rod 1204 is provided with two symmetrical front and back, and the two ends of the guide rod 1204 are respectively movably connected to the inside of one side of the collecting plate 1203, and the two ends of the spring 1205 are respectively fixedly connected to the inside of one side of the collecting plate 1203. A collecting trough is provided at the inner bottom end of 3, the output end of the clean water tank 1206 is fixedly connected to the input end of the water pump 1207 through a pipeline, and the output end of the water pump 1207 is fixedly connected to the input end of the dust-proof nozzle 1208 through a telescopic tube, a plurality of dust-proof nozzles 1208 are provided, and the dust-proof nozzles 1208 are fixedly connected to the inner wall of the collecting plate 1203, the bottom end of the connecting rod 1201 is hinged to the top of the A-shaped connecting frame 1007, a card slot 15 is provided on one side of the collecting plate 1203 and the protective top plate 1202, and the card slot 15 is adapted to the main mounting protective connecting column 8, the clean water tank 1206 and the water pump 1207 are fixedly connected to the top of the fixed mounting base 1.

[0037] When the lifting mechanism 10 is in the process of rising, it will drive the collecting plates 1203 on both sides to expand to both sides through the connecting rod 1201. At this time, during the cutting process of the steel structure cutting knife 11, the water pump 1207 is controlled to pump out the water inside the clean water tank 1206, and spray it on the inside of the collecting plate 1203 through the dustproof nozzle 1208, so as to prevent excessive dust in the cutting process and affect the operation of personnel. At the same time, the spraying can have a certain cooling effect on the steel structure cutting knife 11, so as to prevent the steel structure cutting knife 11 from being deformed due to excessive temperature, thereby improving the service life of the steel structure cutting knife 11. In addition, the guide rod 1204 and the spring 1205 can assist the collecting plate 1203 in resetting. The dustproof mechanism 12 can greatly reduce the generation of dust during the processing. At the same time, the sewage inside the collecting plate 1203 can be flowed into the sewage tank 5 through the collecting trough, so as to be treated uniformly, thereby reducing the difficulty of personnel's work.

[0038] like Figure 5-Figure 8 As shown, the cleaning mechanism 13 includes an electric movable transmission rod 1301, a cleaning scraper 1302, a connecting push block 1303 and a movable transmission rod 1304, the output end of the electric movable transmission rod 1301 is fixedly connected to the outer wall of the connecting push block 1303, one end of the movable transmission rod 1304 is hinged to the outer wall of the connecting push block 1303, and the other end of the movable transmission rod 1304 is hinged to the inner wall of the cleaning scraper 1302. A groove 16 is provided at the top of the fixed mounting base 1, and the electric movable transmission rod 1301 is fixedly connected to the inside of the groove 16, the bottom end of the connecting push block 1303 is slidably connected to the inside of the groove 16, the cleaning scraper 1302 is provided with two groups symmetrically on the left and right, one side of the cleaning scraper 1302 is slidably connected to the top of the support plate 7, and the cleaning scraper 1302 is movably connected to the top of the leak plate 6.

[0039] During the cutting process, the electric movable transmission rod 1301 can be controlled to pull the connecting push block 1303. At this time, the movable transmission rod 1304 will push the cleaning scrapers 1302 on both sides away from each other, thereby cleaning the surface of the leakage plate 6 and pushing the dust and sewage into the sewage tank 5, thereby reducing the workload of personnel and preventing dust accumulation from causing damage to the equipment.

[0040] Here’s how it works:

[0041] When in use, first, when the personnel transfer the equipment to the position where cutting is required, they can control the motor 2 1001 to rotate. When the motor 2 1001 rotates, it will drive the transmission gear 2 1003 to rotate through the transmission gear 1 1002. The rotation of the transmission gear 2 1003 will drive the screw 1005 to move upward, and at this time it will drive the steel structure cutting knife 11 to rise and cut the coal mine tunnel. At the same time, the A-shaped connecting frame 1007, the positioning slider 1008 and the vertical guide rail 1009 can play a certain positioning function for the connecting plate, thereby improving the stability of the protective lifting seat 1006 during movement. In addition, the screw 1005 and the transmission gear 1 1002 and the transmission gear 2 1003 can more accurately adjust the rising height, thereby making it more convenient for personnel to operate. When the lifting mechanism 10 is in the process of rising, it will drive the collecting plates 1203 on both sides to expand to both sides through the connecting rod 1201. At this time During the cutting process of the steel structure cutting knife 11, the water pump 1207 is controlled to pump out the water inside the cleaning water tank 1206, and spray it on the inside of the collecting plate 1203 through the dustproof nozzle 1208, so as to prevent excessive dust during the cutting process. The spraying can have a certain cooling effect on the steel structure cutting knife 11, so as to prevent the steel structure cutting knife 11 from being deformed due to excessive temperature. The dust prevention mechanism 12 can greatly reduce the generation of dust during the processing. At the same time, the sewage inside the collecting plate 1203 can be flowed into the sewage tank 5 through the collection trough, so as to be treated uniformly, thereby reducing the difficulty of work for personnel. During the cutting process, the electric active transmission rod 1301 can be controlled to pull the connecting push block 1303. At this time, the active transmission rod 1304 will push the cleaning scrapers 1302 on both sides away from each other, so as to clean the surface of the leak plate 6 and push the dust and sewage into the sewage tank 5.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A coal mine tunnel roof cutting pressure relief device, comprising a fixed mounting base (1), characterized in that: The bottom end of the fixed installation base (1) is fixedly connected to a protective bottom plate (2), and the bottom end of the protective bottom plate (2) is fixedly connected to a plurality of universal wheels (3); the top end of the fixed installation base (1) is fixedly connected to a supporting protective column (4); a group of front-to-back symmetrical sewage troughs (5) are provided on the opposite side of the fixed installation base (1) away from the supporting protective column (4), and a drain plate (6) is fixedly connected to the top of the sewage trough (5); the side of the fixed installation base (1) away from the sewage trough (5) is fixedly connected to a supporting plate (7), and the top end of the supporting plate (7) is fixedly connected to a main installation protective connecting column (8); the main installation protective connecting column (8) is movably connected to a lifting mechanism (10) inside; The lifting mechanism (10) is fixedly connected to a motor (9) inside, and the output end of the motor (9) is fixedly connected to a steel structure cutting knife (11), the top end of the supporting protection column (4) is fixedly connected to a dust prevention mechanism (12), the top end of the leak plate (6) is movably connected to a cleaning mechanism (13), and the bottom end of the sewage tank (5) is fixedly connected to a water outlet pipe (14), and the bottom end of the water outlet pipe (14) extends to the outside of the fixed mounting base (1).

2. A coal mine tunnel roof cutting pressure relief device according to claim 1, characterized in that: The lifting mechanism (10) comprises a second motor (1001), a transmission gear (1002), a second transmission gear (1003), a cylindrical fixing seat (1004), a screw (1005), a protective lifting seat (1006), an A-shaped connecting frame (1007), a positioning slide block (1008) and a vertical guide rail (1009), wherein the output end of the second motor (1001) is fixedly connected to the axis of the first transmission gear (1002), and the first transmission gear (1003) is connected to the second transmission gear (1004). 02) is movably connected to the outer wall of the transmission gear 2 (1003), the bottom end of the transmission gear 2 (1003) is rotatably connected to the top of the cylindrical fixed seat (1004), the screw rod (1005) is threadedly connected to the inside of the transmission gear 2 (1003), the top end of the screw rod (1005) is fixedly connected to the bottom end of the protective lifting seat (1006), and one side of the A-shaped connecting frame (1007) is fixedly connected to the outer wall of the protective lifting seat (1006).

3. A coal mine tunnel roof cutting pressure relief device according to claim 2, characterized in that: The positioning slider (1008) and the vertical guide rail (1009) are provided with two groups symmetrical on the left and right, the positioning slider (1008) is slidably connected to the outer wall of the vertical guide rail (1009), the outer wall of the positioning slider (1008) is respectively fixedly connected to the other side of the A-shaped connecting frame (1007), the vertical guide rail (1009) is fixedly connected to the inner wall of the supporting protective column (4), and the motor 2 (1001) is fixedly connected to the bottom outer side of the main installation protective connecting column (8).

4. A coal mine tunnel roof cutting pressure relief device according to claim 2, characterized in that: The outer wall of the main installation protection connecting column (8) is provided with a sliding groove, and the transmission gear 1 (1002) is meshed with the transmission gear 2 (1003) through the sliding groove. The protection lifting seat (1006) is slidably connected to the inside of the main installation protection connecting column (8), and the top sides of the protection lifting seat (1006) extend to the outside of the sliding groove and are fixedly connected to the A-shaped connecting frame (1007). The bottom end of the cylindrical fixed seat (1004) is fixedly connected to the inner bottom end of the main installation protection connecting column (8), and the steel structure cutting knife (11) is rotatably connected to the inner top of the protection lifting seat (1006).

5. A coal mine tunnel roof cutting pressure relief device according to claim 1, characterized in that: The dust prevention mechanism (12) comprises a connecting rod (1201), a protective top plate (1202), a collecting plate (1203), a guide rod (1204), a spring (1205), a clean water tank (1206), a water pump (1207) and a dust prevention nozzle (1208); the top end of the connecting rod (1201) is hinged to the bottom end of the collecting plate (1203), and the collecting plate (1203) is slidably connected to the inside of the protective top plate (1202); the collecting plate (1203) is provided with two left-right symmetrical ones; the guide rod (1204) is provided with two front-back symmetrical ones, and the two ends of the guide rod (1204) are respectively movably connected to the inside of one side of the collecting plate (1203); the two ends of the spring (1205) are respectively fixedly connected to the inside of one side of the collecting plate (1203); and a collecting groove is provided at the inner bottom end of the collecting plate (1203).

6. A coal mine tunnel roof cutting pressure relief device according to claim 5, characterized in that: The output end of the clean water tank (1206) is fixedly connected to the input end of the water pump (1207) via a pipeline, and the output end of the water pump (1207) is fixedly connected to the input end of the dust-proof nozzle (1208) via a telescopic tube. A plurality of dust-proof nozzles (1208) are provided, and the dust-proof nozzles (1208) are fixedly connected to the inner wall of the collecting plate (1203).

7. A coal mine tunnel roof cutting pressure relief device according to claim 5, characterized in that: The bottom end of the connecting rod (1201) is hinged to the top end of the A-shaped connecting frame (1007); a slot (15) is provided on one side of the collecting plate (1203) and the protective top plate (1202); and the slot (15) is adapted to the main mounting protective connecting column (8); and the clean water tank (1206) and the water pump (1207) are fixedly connected to the top end of the fixed mounting base (1).

8. A coal mine tunnel roof cutting pressure relief device according to claim 1, characterized in that: The cleaning mechanism (13) comprises an electrically movable transmission rod (1301), a cleaning scraper (1302), a connecting push block (1303) and an movable transmission rod (1304), wherein the output end of the electrically movable transmission rod (1301) is fixedly connected to the outer wall of the connecting push block (1303), one end of the movable transmission rod (1304) is hinged to the outer wall of the connecting push block (1303), and the other end of the movable transmission rod (1304) is hinged to the inner wall of the cleaning scraper (1302).

9. A coal mine tunnel roof cutting pressure relief device according to claim 8, characterized in that: The top of the fixed mounting base (1) is provided with a groove (16), and the electrically movable transmission rod (1301) is fixedly connected to the inside of the groove (16), the bottom end of the connecting push block (1303) is slidably connected to the inside of the groove (16), and the cleaning scraper (1302) is provided with two groups symmetrically on the left and right.

10. A coal mine tunnel roof cutting pressure relief device according to claim 8, characterized in that: One side of the cleaning scraper (1302) is slidably connected to the top of the support plate (7), and the cleaning scraper (1302) is movably connected to the top of the leak plate (6).

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