A carbon fixation strip mining and filling system and its use method

Abstract

The present invention proposes a carbon-fixing strip mining and filling system and a method for using the same, which mainly consists of a continuous mining machine, a continuous conveying system, an advance support, a handling manipulator, and a paste negative carbon filling body mixing system. The continuous mining machine is connected to the belt conveyor through the continuous conveyor, and the advance support is installed at the coal mining operation coal lane and is located between the continuous conveyor and the belt conveyor; the frame is fixed on the crawler, the motor is set on the frame and can move along the frame, the output end of the motor can be connected to the transmission single section at the tail of the continuous conveyor, and the handling manipulator is set at the tail of the continuous conveyor; the paste negative carbon filling body mixing system includes a material tank, a carbon dioxide gas tank, a mixer and a conveying pump, the material tank and the carbon dioxide gas tank are respectively connected to the inlet of the mixer, and the outlet of the mixer is connected to the filling pipeline through the conveying pump. The advantage of the present invention is that it can realize continuous transportation of coal in the lane, the operation is faster, and short-wall filling mining is realized, which greatly saves mining costs.

Description

Technical Field

[0001] The invention relates to a carbon-fixing strip mining and filling system and a use method thereof, belonging to the technical field of short-wall paste filling mining. Background Art

[0002] The end-wall mining method not only reduces mining costs but also reduces the waste of coal resources and increases the coal mining rate. Current underground mining operations in my country not only have high initial investment costs, but also require protective pillars with a thickness of 10-40m after the working face is mined. This enormous amount of coal used as protective pillars makes it difficult to increase the recovery rate during underground operations, resulting in insufficient resource utilization and severe waste. The characteristics of the end-wall mining method used in open-pit mines are well suited to solving the problems currently encountered in underground mines. Therefore, it is possible to try to apply the open-pit end-wall mining method underground. The spacious space of open-pit mines provides an excellent working environment for end-wall mining. In the process of applying end-wall mining underground, it is necessary to improve on the original advantages and create a new set of coal mining methods and processes. This requires the redesign and improvement of the underground working face mining process.

[0003] Traditional coal-pressing mining methods have low recovery rates and cause severe damage to surface water and the environment. Backfill mining technology effectively complements the "three-down" coal-pressing method, increasing greening efficiency and reducing rock burst pressure. A cheaper backfill mining method is urgently needed. Meanwhile, a new backfilling technology developed in recent years offers excellent fluidity, enabling self-flowing backfill. The backfill can effectively control roof movement and meet production needs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a carbon fixation strip mining and filling system and its use method, which can effectively solve the disadvantages of short-wall mining collapse, with small surface deformation, effectively protect surface buildings, and provide new ideas for "three-down" mining.

[0005] The present invention provides a strip mining and filling mechanical system, which is mainly composed of a continuous mining machine, a continuous transportation system, an advanced support, a handling manipulator and a paste negative carbon filling body mixing system. The continuous transportation system includes a continuous conveyor and a belt conveyor. The continuous mining machine is connected to the belt conveyor through the continuous conveyor. The advanced support is installed in the coal lane of the coal mining operation and is located between the continuous conveyor and the belt conveyor; the continuous conveyor includes a crawler, a frame, a motor and a multi-section transmission section. The frame is fixed on the crawler, the motor is arranged on the frame and can move along the frame, the output end of the motor can be connected to the transmission section at the tail of the continuous conveyor, and the handling manipulator is arranged at the tail of the continuous conveyor; the paste negative carbon filling body mixing system includes a material tank, a carbon dioxide gas tank, a mixer and a conveying pump. The material tank and the carbon dioxide gas tank are respectively connected to the inlet of the mixer, and the outlet of the mixer is connected to the filling pipeline through the conveying pump.

[0006] The technical solution further optimized as the present invention is as follows:

[0007] Preferably, the handling robot includes a monorail crane track, a monorail crane and a monorail crane robot, the monorail crane is installed on the monorail crane track and can move along the monorail crane track, and the monorail crane robot is installed on the monorail crane.

[0008] In this way, the handling robot includes a monorail crane track, a monorail crane, and a monorail crane robot, which is used to assist in handling a single-section transmission.

[0009] Preferably, the frame is provided with a supporting cylinder, a main pushing cylinder and a placement platform. The supporting cylinder can be abutted against the side wall of the tunnel, the main pushing cylinder can be abutted against the transmission section at the tail of the continuous conveyor, and the lower end of the transmission section is provided with a sliding shoe. The placement platform is used to place the transmission section at the tail of the continuous conveyor.

[0010] Preferably, the transmission section at the tail of the continuous conveyor is connected to the belt conveyor through a material guide port.

[0011] Preferably, the motor is mounted on a motor base, the motor base cooperates with a frame slide groove provided on the frame, and the motor base can move along the frame slide groove.

[0012] Preferably, the front end of the transmission section is provided with a fixed card joint and a guide hole, and the rear end is provided with a movable card joint and a guide pin; the movable card joint of the front transmission section in the two adjacent transmission sections cooperates with the fixed card joint of the rear transmission section, and the guide pin of the front transmission section in the two adjacent transmission sections cooperates with the guide hole of the rear transmission section.

[0013] Preferably, the monorail crane manipulator includes a main body, a push slider, a guide rod, a transmission rod, a clamping plate and a clamping link. The main body is V-shaped and a slide groove is provided on the main body. The push slider is installed in the slide groove and can move along the slide groove. One end of the guide rod is hinged to the push slider, and the other end is hinged to the clamping link through the transmission rod. The clamping link is connected to the clamping plate.

[0014] Preferably, the material tank includes an auxiliary material tank, a solid material tank, a cement tank and a water tank, the mixer is a double-shaft horizontal mixer, the cavity of the mixer is connected to a pressure reducing valve, and an air outlet valve is provided on the connecting pipeline between the mixer and the carbon dioxide gas tank.

[0015] The above-mentioned paste negative carbon filling system consists of auxiliary material tanks, solid material tanks, cement tanks, water tanks and carbon dioxide tanks, etc., which are equipped with metering devices and valves to transport negative carbon materials into the mixer, and then transport them to the filling tunnel through the filling pump and filling pipeline.

[0016] Preferably, the belt conveyor includes a conveyor belt, a conveyor belt head and a conveyor belt tail, and the conveyor belt head and the conveyor belt tail are connected by a conveyor belt; a pump station and a mobile power supply are provided behind the conveyor belt tail, and the pump station can be connected to the supporting oil cylinder, the main push oil cylinder and the motor push oil cylinder, and the mobile power supply can be connected to the intelligent control valve group, the continuous mining machine and the motor.

[0017] The present invention also provides a method for using the strip collecting and filling mechanical system, comprising the following steps:

[0018] Step 1: Before mining, tunnel the coalfield and divide it into two wings, east and west. During mining, the two wings are split into two halves, and the strips on both sides are mined alternately.

[0019] Step 2: Arrange the belt conveyor on the left side of the transport tunnel, and the continuous miner starts to mine coal in the secondary mining tunnel. In the initial stage of coal mining, there is no need for a continuous conveyor. The mined coal blocks pass through the continuous miner and its joints, and then are transported by the belt conveyor;

[0020] Step 3: After the continuous miner has mined a certain distance, it suspends mining operations, arranges a continuous conveyor and an advance support behind the continuous miner, places the conveyor tail behind the advance support, arranges a mobile power supply and a pump station behind the conveyor tail, connects the continuous miner to the continuous conveyor, and continues mining, ensuring that coal blocks flow smoothly from the continuous miner to the continuous conveyor, and are then transported smoothly to the belt conveyor via the continuous conveyor.

[0021] When the continuous miner continues to advance a certain distance, the continuous miner suspends the mining operation, delays the suspension of the continuous conveyor, and the main push cylinder moves forward a certain distance, thereby moving the transmission section; start the monorail crane and the monorail crane manipulator on it, operate the push slider on the monorail crane manipulator, so that the power is transmitted to the clamping plate through the guide rod, transmission rod, and clamping link, and the monorail crane manipulator clamps the transmission section, so that the monorail crane manipulator clamps the transmission section placed on the right side of the transport tunnel, and transports it to the top of the continuous conveyor through the monorail crane track; operate the monorail crane manipulator to place the transmission section on the placement table, and the motor base moves, thereby connecting the motor to the transmission section on the placement table; at the same time, the fixed card joint and guide hole of the rear transmission section on the placement table are matched with the movable card joint and guide pin of the front transmission section to realize double positioning;

[0022] The continuous miner and continuous conveyor are restarted. After the continuous miner advances a certain distance, the previous action is repeated to install the transmission section until the entire roadway coal mining operation is completed.

[0023] Step 4: After completing the coal mining operation in the entire tunnel, move the belt conveyor and place it back to the right side of the transport tunnel through the monorail crane and its manipulator. Then exit the continuous conveyor and advance support in turn. Finally, operate the continuous miner to move to the cross tunnel on the opposite side of the transport tunnel for a new round of mining operations.

[0024] Step 5. For the mined tunnels, filling operations need to be carried out. For the filled tunnels, first use the filling retaining wall to seal the two ends of the tunnel. The filling paste obtained by the mixer flows into the filling tunnel through the filling pipeline. After the filling paste fills the tunnel, let it stand until the filling material reaches the set strength and then remove the filling retaining wall.

[0025] When the continuous miner mines coal, it connects with the continuous conveyor to continuously transport the coal to the main tunnel's accompanying belt conveyor, achieving safe and rapid coal transportation. Simultaneously, movable advance supports are installed at tunnel intersections, equipped with relevant pumping stations and mobile power supplies, enabling continuous mining and support operations. After mining one tunnel on the left, the right tunnel is cross-mined, achieving strip mining and filling operations, reducing surface deformation. This method enables short-wall continuous mechanized mining and is a green, safe, and efficient coal mining process system.

[0026] The advantages of the present invention are that it can realize continuous coal transportation in the tunnel, which is more efficient to operate and realize short-wall filling mining, greatly saving mining costs. At the same time, the present invention has a high resource recovery rate and can recover more than 95% of coal. On the one hand, it can realize underground filling of waste materials such as gangue and fly ash, realizing waste utilization; on the other hand, since filling mining can prevent mine disasters. In short, the present invention has a simple structure, is conducive to short-wall mining, improves coal production efficiency, meets the requirements of green coal mining and green production, and has wide practical application in the field of mineral mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the overall layout diagram of the strip collecting and filling mechanical system of the present invention.

[0028] Figure 2 It is a longitudinal diagram of the strip filling mechanical system of the present invention.

[0029] Figure 3 This is a ground and underground schematic diagram of the strip mining and filling mechanical system of the present invention.

[0030] Figure 4 It is a side view of the continuous conveyor and the handling robot of the present invention.

[0031] Figure 5 It is a top view of the continuous conveyor of the present invention.

[0032] Figure 6 Schematic diagram of the motor adjustment mechanism of the present invention.

[0033] Figure 7 It is a schematic diagram of the single-section transmission plug-in mechanism in the present invention.

[0034] Figure 8 It is a schematic diagram of the monorail hanging joints in the present invention.

[0035] Figure: 1. Conveyor head, 2. Conveyor belt, 3. Monorail crane track, 4. Monorail crane, 5. Monorail crane manipulator, 5-1. Sliding slide, 5-2. Guide rod, 5-3. Transmission rod, 5-4. Clamping link, 5-5. Clamping plate, 6. Transmission section, 7. Continuous conveyor, 8. Conveyor tail, 9. Mobile power supply, 10. Pump station, 11. Continuous miner, 12. Sliding shoe, 13. Support cylinder, 14. Advance support, 15. Coal mining tunnel, 16. Transport tunnel, 17. Filling tunnel, 18. Tunnel to be mined, 19. Filling retaining wall, 20. Filling pipeline, 21. Auxiliary material tank, 22. Solid material tank, 23. Cement tank, 24. Water tank, 25. Pressure reducing valve, 26. Mixer, 27. Intelligent air intake valve, 28. Carbon dioxide tank, 29. Conveying pump, 30. Track, 31. Frame, 32. Motor, 32-1. Motor base, 32-2. Frame slide, 33. Material guide port, 34. Intelligent control valve group, 35. Main push cylinder, 36. Placement table, 37. Rear transmission section, 38. Fixed card joint, 39. Guide hole, 40. Movable card joint, 41. Guide pin, 42. Front transmission section. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings: This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and specific operation process are given, but the protection authority of the present invention is not limited to the following embodiments. Example 1

[0037] A strip collecting and filling mechanical system and method of use, such as Figure 1 and Figure 2As shown, it is mainly composed of a continuous mining machine 11, a continuous transportation system, an advance support 14, a handling manipulator and a paste negative carbon filling body mixing system, wherein the continuous transportation system includes a continuous conveyor 7 and a belt conveyor 2, the continuous mining machine 11 is connected to the belt conveyor 2 through the continuous conveyor 7, the advance support 14 is installed in the coal mining operation coal lane and is located between the continuous conveyor 7 and the belt conveyor 2; the continuous conveyor 7 includes a crawler 30, a frame 31, a motor 32 and a set of transmission single sections 6, the frame 31 is fixed on the crawler 30, the motor 32 The system is mounted on and movable along a frame 31. The output end of the motor 32 is connected to the transmission unit 6 at the rear of the continuous conveyor 7. The handling manipulator is located at the rear of the continuous conveyor 7. The paste negative carbon filling mixing system includes an auxiliary material tank 21, a solid material tank 22, a cement tank 23, a water tank 24, a carbon dioxide gas tank 28, a mixer 26, and a delivery pump 29. The material tank and carbon dioxide gas tank 28 are respectively connected to the inlet of the mixer 26. The outlet of the mixer 26 is connected to the filling pipeline 20 via the delivery pump 29. The belt conveyor 2 includes a conveyor belt, a conveyor head 1, and a conveyor tail 8. The conveyor head 1 and the conveyor tail 8 are connected by a conveyor belt. A pump station 10 and a mobile power supply 9 are located behind the conveyor tail 8. The pump station 10 can be connected to the support cylinder 13, the main push cylinder 35, and the motor push cylinder. The mobile power supply 9 can be connected to the intelligent control valve group 34, the continuous mining machine 11, the motor 32, and other equipment.

[0038] like Figure 3 As shown, mixer 26 is a twin-shaft horizontal mixer. The mixer chamber is connected to a pressure reducing valve 25 via an exhaust line to exhaust air from the mixing chamber. An intelligent air outlet valve 27 is installed on the connecting line between mixer 26 and carbon dioxide tank 28. The filling material is delivered from auxiliary material tank 22, solid material tank 23, and cement tank 24. It is then mixed with a predetermined proportion of water by water tank 24 and flows into mixer 26 via a metering and conveying device. It is then transported to the filling pipe 20 via a delivery pump 29. To prepare the filling material, the filling material is introduced into mixer 26, mixed with a predetermined proportion of water, and then a fixed amount of CO2 is introduced. Because CO2 is denser than air, the CO2 inlet port on mixer 26 is designed to be just above the level of the mixture. The air outlet is located at the upper end of the mixer's sealing plate, with a pressure reducing valve 25 installed at the outlet. By opening the intelligent air inlet valve 27, CO2 enters the mixing chamber at a pressure of 0.1 MPa and is expelled through the pressure reducing valve 25. After stirring the mixture for 20 minutes, the stirred filling material is transported to the filling tunnel 17 through the filling pipeline 20 via the sealed delivery pump 29. When the filling material flows into the delivery pump, the air outlet is closed and the CO2 gas tank 28 and the intelligent air inlet valve 27 are kept open to prevent the formation of negative pressure in the system from affecting the pipeline filling and delivery.

[0039] like Figure 4 As shown, the handling manipulator includes a monorail track 3, a monorail crane 4 and a monorail crane manipulator 5. The monorail crane 4 is installed on the monorail track 3 and can move along the monorail track 3. The monorail crane manipulator 5 is installed on the monorail crane 4. A supporting cylinder 13, a main push cylinder 35 and a placement platform 36 are provided on the frame 31. The supporting cylinder 13 can be abutted against the side wall of the lane. The main push cylinder 35 can be abutted against the transmission section 6 at the tail end of the continuous conveyor 7. The main push cylinder 35 is connected to the intelligent control valve group 34 provided on the frame 31. The lower end of the transmission section 6 is provided with a sliding shoe 12. The placement platform 36 is used to place the transmission section 6 at the tail end of the continuous conveyor 7. The transmission section 6 at the tail end of the continuous conveyor 7 is connected to the belt conveyor 2 through the material guide port 33 (see Figure 5 ).

[0040] like Figure 6 As shown, the motor 32 is mounted on a motor base 32-1, which cooperates with a frame slide 32-2 provided on the frame 31 and can move along the frame slide 32-2. The motor base 32-1 is connected to a motor push cylinder, which is connected to the intelligent control valve group 34.

[0041] like Figure 7 As shown, in the adjacent front and rear transmission sections, the front end of the rear transmission section 37 is provided with a fixed card joint 38 and a guide hole 39, and the rear end of the front transmission section 42 is provided with a movable card joint 40 and a guide pin 41; in the two adjacent transmission sections, the movable card joint 40 of the front transmission section 42 cooperates with the fixed card joint 38 of the rear transmission section 37, and the guide pin 41 of the front transmission section 42 in the two adjacent transmission sections cooperates with the guide hole 39 of the rear transmission section 37.

[0042] like Figure 8 As shown, the monorail crane manipulator 5 includes a main body, a push slider 5-1, a guide rod 5-2, a transmission rod 5-3, a clamping plate 5-5 and a clamping link 5-4. The main body is V-shaped and is provided with a slide groove. The push slider 5-1 is installed in the slide groove and can move along the slide groove. One end of the guide rod 5-2 is hinged to the push slider 5-1, and the other end is hinged to the clamping link 5-4 through the transmission rod 5-3. The clamping link 5-4 is connected to the clamping plate 5-5.

[0043] A method for using a strip collecting and filling mechanical system comprises the following steps:

[0044] Step 1: Before mining, tunnels are excavated in the coalfield to divide the coalfield into east and west wings. During mining, the two wings are divided into two open types, and the strips on both sides are mined alternately.

[0045] Step 2: Arrange the conveyor head 1 and the conveyor tail 8 of the belt conveyor on the left side of the transport tunnel 16. The continuous mining machine 11 starts to mine coal in the mining tunnel 18. In the initial stage of coal mining, there is no need for the continuous conveyor 7. The mined coal blocks pass through the continuous mining machine 11 and its joints, and then are transported by the belt conveyor 2.

[0046] Step 3: After the continuous miner 11 has mined continuously for about 3 meters, the mining operation is suspended, and equipment such as a continuous conveyor 7 and an advance support 14 are arranged behind the continuous miner 11, so that the conveyor tail 8 is located behind the advance support 14, and a mobile power supply 9 and a pump station 10 are arranged behind the conveyor tail 8, so that the continuous miner 11 and the continuous conveyor 7 are connected together through a bridge device, and the continuous miner 11 continues to mine, so that the coal blocks flow smoothly from the continuous miner 11 to the continuous conveyor 7, and the coal blocks pass through the spiral drive or belt device of the continuous conveyor 7 and are smoothly transported to the belt conveyor 2 through the material guide port 33; the continuous conveyor 7 can use the support cylinder 13 to support the roadway, provide safe and complete positioning for the entire machine, and realize safe and fast transportation of coal;

[0047] The frame 31 of the continuous conveyor 7 is fixed on the crawler 30 and can move on its own. The intelligent control valve group 34 is fixed on the frame 31;

[0048] When the continuous mining machine 11 continues to advance 3 meters, that is, the overlap length of the continuous mining machine 11 and the continuous conveyor 7 reaches the limit, the continuous mining machine 11 suspends the mining operation and delays the suspension of the continuous conveyor 7 operation. By operating the intelligent control valve group 34, the main push cylinder 35 moves forward 3 meters, and then moves the transmission single section 6 and the sliding shoe 12 thereon on the bottom plate for 3 meters. Due to the action of the sliding shoe 12, the transmission single section 6 will not sink into the bottom plate; start the monorail crane 4 and the monorail crane manipulator 5 thereon, operate the push slider 5-1 on the monorail crane manipulator 5, so that the power is transmitted to the clamping plate 5-5 through the guide rod 5-2, the transmission rod 5-3, and the clamping link 5-4, so as to realize the operation of the monorail crane manipulator 5 clamping the transmission single section 6, so that the monorail crane manipulator 5 clamps the transmission single section 6 placed on the right side of the transport tunnel 16, and transports it to the top of the continuous conveyor 7 through the monorail crane track 3;

[0049] Operate the monorail crane manipulator 5 to place the transmission unit 6 on the placement table 36, and operate the intelligent control valve group 34 to make the motor base 32-1 move forward along the rack slide 32-2 (see Figure 6 ), thereby connecting the motor 32 to the transmission unit 6 on the placement table 36;

[0050] The fixed card joint 38 and the guide hole 39 of the rear transmission section 37 are connected with the movable card joint 40 and the guide pin 41 of the front transmission section 42 to achieve double positioning (see Figure 7 );

[0051] The continuous mining machine 11 and the continuous conveyor 7 are restarted. After the continuous mining machine 11 advances 3 meters, the previous action is repeated to install the transmission unit 6 until the entire tunnel coal mining operation is completed.

[0052] Step 4: After completing the entire roadway coal mining operation, the conveyor head 2 and conveyor tail 8 of the mobile belt conveyor are returned to the right side of the main transport roadway 16 via the monorail crane 4 and its attached monorail crane manipulator 5. The continuous conveyor 7 and the advanced support 14 are then withdrawn. Finally, the continuous miner 11 is operated to move to the crossroads on the opposite side of the main transport roadway 16 for a new round of mining operations, as shown in the coal mining operation roadway 15.

[0053] Step 5. For the mined tunnels, filling operations need to be carried out. For the filling tunnel 17, first use the filling retaining wall 19 to seal the two ends of the tunnel. The filling paste obtained by the mixer 26 flows into the filling tunnel 17 through the filling pipeline 20. After the filling paste fills the tunnel, let it stand until the filling material reaches the set strength, and then remove the filling retaining wall 19.

[0054] The filling material includes the materials output from the auxiliary material tank 22, the solid material tank 23, and the cement tank 24, and is mixed with a certain proportion of water from the water tank 24, flows into the mixer 26 through the metering weighing and conveying device, and is then transported to the filling pipeline 20 through the conveying pump 29.

[0055] To prepare the filling material, the filling material is fed into a mixer 26 and mixed with a predetermined proportion of water. A fixed amount of CO2 is then introduced. Since CO2 is denser than air, the CO2 inlet on the mixer 26 can be designed to be just above the height of the mixture. The air outlet is located at the upper end of the mixer's sealing plate, with a pressure reducing valve 25 installed at the outlet. By opening the intelligent air inlet valve 27, the CO2 enters the mixing silo at a pressure of 0.1 MPa and is expelled through the pressure reducing valve 25.

[0056] After stirring the mixture for 20 minutes, the stirred filling material is transported to the filling tunnel 17 through the filling pipeline 20 via the sealed delivery pump 29. When the filling material flows into the delivery pump, the air outlet is closed and the CO2 gas tank 28 and the intelligent air inlet valve 27 are kept open to prevent the formation of negative pressure in the system from affecting the pipeline filling and delivery.

[0057] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technology can understand and think of any changes or replacements within the technical scope disclosed by the present invention, which should be included in the scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A carbon-fixing strip mining and filling system and its use method, characterized by: The system involved in the method is mainly composed of a continuous mining machine, a continuous transportation system, an advanced support, a handling manipulator and a paste negative carbon filling body mixing system. The continuous transportation system includes a continuous conveyor and a belt conveyor. The continuous mining machine is connected to the belt conveyor through the continuous conveyor. The advanced support is installed at the coal mining operation coal lane and is located between the continuous conveyor and the belt conveyor; the continuous conveyor includes a crawler, a frame, a motor and a multi-section transmission section. The frame is fixed on the crawler, the motor is arranged on the frame and can move along the frame, the output end of the motor can be connected to the transmission section at the tail of the continuous conveyor, and the handling manipulator is arranged at the tail of the continuous conveyor; the paste negative carbon filling body mixing system includes an auxiliary material tank, a solid material tank, a cement tank, a water tank, a carbon dioxide gas tank, a mixer and a conveying pump. The auxiliary material tank, solid material tank, cement tank, water tank and carbon dioxide gas tank are respectively connected to the inlet of the mixer, the outlet of the mixer is connected to the filling pipeline through a delivery pump, the cavity of the mixer is connected to a pressure reducing valve, and an air outlet valve is provided on the connecting pipeline between the mixer and the carbon dioxide gas tank; the handling manipulator includes a monorail crane track, a monorail crane and a monorail crane manipulator, the monorail crane is installed on the monorail crane track and can move along the monorail crane track, and the monorail crane manipulator is installed on the monorail crane; a supporting oil cylinder, a main pushing oil cylinder and a placing table are provided on the frame, the supporting oil cylinder can be abutted against the side wall of the lane, the main pushing oil cylinder can be abutted against the transmission single section at the tail of the continuous conveyor, the lower end of the transmission single section is provided with a sliding shoe, and the placing table is used to place the transmission single section at the tail of the continuous conveyor; The following steps are involved: Step 1: Before mining, tunnel the coalfield and divide it into two wings, east and west. During mining, the two wings are split into two halves, and the strips on both sides are mined alternately. Step 2: Arrange the belt conveyor on the left side of the transport tunnel, and the continuous miner starts to mine coal in the secondary mining tunnel. In the initial stage of coal mining, there is no need for a continuous conveyor. The mined coal blocks pass through the continuous miner and its joints, and then are transported by the belt conveyor; Step 3: After the continuous miner has mined a certain distance, it suspends mining operations, arranges a continuous conveyor and an advance support behind the continuous miner, places the conveyor tail behind the advance support, arranges a mobile power supply and a pump station behind the conveyor tail, connects the continuous miner to the continuous conveyor, and continues mining, ensuring that coal blocks flow smoothly from the continuous miner to the continuous conveyor, and are then transported smoothly to the belt conveyor via the continuous conveyor. When the continuous miner continues to advance a certain distance, the continuous miner suspends the mining operation, delays the suspension of the continuous conveyor, and the main push cylinder moves forward a certain distance, thereby moving the transmission section; start the monorail crane and the monorail crane manipulator on it, operate the push slider on the monorail crane manipulator, so that the power is transmitted to the clamping plate through the guide rod, transmission rod, and clamping link, and the monorail crane manipulator clamps the transmission section, so that the monorail crane manipulator clamps the transmission section placed on the right side of the transport tunnel, and transports it to the top of the continuous conveyor through the monorail crane track; operate the monorail crane manipulator to place the transmission section on the placement table, and the motor base moves, thereby connecting the motor to the transmission section on the placement table; at the same time, the fixed card joint and guide hole of the rear transmission section on the placement table are matched with the movable card joint and guide pin of the front transmission section to realize double positioning; The continuous miner and continuous conveyor are restarted. After the continuous miner advances a certain distance, the previous action is repeated to install the transmission section until the entire roadway coal mining operation is completed. Step 4: After completing the coal mining operation in the entire tunnel, move the belt conveyor and place it back to the right side of the transport tunnel through the monorail crane and its manipulator. Then exit the continuous conveyor and advance support in turn. Finally, operate the continuous miner to move to the cross tunnel on the opposite side of the transport tunnel for a new round of mining operations. Step 5. For the mined tunnels, filling operations need to be carried out. For the filled tunnels, first use the filling retaining wall to seal the two ends of the tunnel. The filling paste obtained by the mixer flows into the filling tunnel through the filling pipeline. After the filling paste fills the tunnel, let it stand until the filling material reaches the set strength and then remove the filling retaining wall.

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