Continuous mining system for open pit coal mine

Abstract

The utility model relates to the technical field of strip coal mining, in particular to a kind of strip coal continuous mining system, comprising: coal mining machine, self-moving conveyer, moving conveyer and belt conveyor, the belt conveyor and the moving conveyer are used to be arranged in the periphery of coal mining area, the coal collected by the coal mining machine is conveyed to the moving conveyer by the self-moving conveyer, the moving conveyer conveys coal to the belt conveyor, and the belt conveyor conveys the coal to coal yard.The utility model strip coal continuous mining system realizes the operation of strip coal stripping-mining-loading-transportation integration continuous mining by coal mining machine, self-moving conveyer, moving conveyer and belt conveyor, solves the technical problem of process dispersion and long cycle in the process of strip coal mining in prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of surface coal mining, in particular to a continuous mining system for surface coal mines. Background Art

[0002] Surface coal mining, also known as open-pit coal mining, is a method of coal mining carried out in an open surface space, which mainly comprises two links: overburden removal and coal mining. During the mining process, various mechanical equipment such as drilling equipment, mining equipment, and transportation equipment are used to complete the excavation, transportation and discharge of ores. According to different mining methods, surface mining can be divided into various process types such as discontinuous mining, continuous mining, semi-continuous mining, and casting mining. The traditional discontinuous mining process mainly includes processes such as drilling, blasting, excavating and loading transportation, and overburden dumping. Different excavation and transportation equipment are used in the mining process, usually including drilling equipment such as rotary drills, mining equipment such as electric shovels, transportation equipment such as mining dump trucks, dumping equipment such as bulldozers, and crushers for complex applications.

[0003] Most of the existing surface coal mining processes adopt discontinuous mining. In the mining process, pre-splitting blasting by drilling is required for the coal seam first, then the coal is shoveled and loaded onto the mining dump truck by an electric shovel, then the coal is transported by the mining dump truck to a fixed crushing station, and finally the crushed coal is transported by the mining dump truck to the coal yard. The whole mining process has discrete working procedures and a long cycle; explosives are required in the blasting process, which leads to high safety risks and serious dust pollution. Although the bucket-wheel continuous mining process realizes continuous operation of mining and transportation, it is only suitable for mining coal seams with relatively soft hardness, and the system has high stability requirements. Any problem in any link will lead to system shutdown, which affects the continuity and stability of production. Contents of the Utility Model

[0004] The purpose of the utility model is to provide a continuous mining system for surface coal mines, so as to solve the technical problems of discrete working procedures and long cycle in the surface coal mining process in the prior art. The specific technical scheme is as follows: The utility model provides a continuous mining system for surface coal mines, comprising a coal mining machine, a self-moving conveyor, a relocatable conveyor and a belt conveyor, wherein the belt conveyor and the relocatable conveyor are arranged at the periphery of a coal mining area; the coal mined by the coal mining machine is conveyed to the relocatable conveyor through the self-moving conveyor, the relocatable conveyor conveys the coal to the belt conveyor, and the belt conveyor conveys the coal to a coal yard.

[0005] A further improvement of the continuous mining system for surface coal mines according to the utility model lies in that the self-moving conveyor comprises a first crawler chassis, a support frame and a feeding assembly, wherein the support frame is connected to the first crawler chassis, and the feeding assembly is mounted on the support frame.

[0006] A further improvement of the open-pit coal mine continuous mining system of this utility model is that the feeding assembly includes a receiving hopper, a discharging hopper, a conveyor belt, and a drive assembly. The receiving hopper is installed at the first end of the support frame, the discharging hopper is installed at the second end of the support frame, the conveyor belt is used to transfer the coal from the receiving hopper to the discharging hopper, and the drive assembly is used to drive the conveyor belt to move.

[0007] A further improvement of this utility model of a continuous open-pit coal mining system is that the transfer conveyor includes a standard unit section, a drive unit section, a driven unit section, and a conveyor belt. The standard unit section is connected between the drive unit section and the driven unit section. The conveyor belt is installed on the standard unit section, the drive unit section, and the driven unit section. A lateral movement device is provided at the bottom of the standard unit section, the drive unit section, and the driven unit section.

[0008] A further improvement of this utility model of continuous open-pit coal mining system is that the number of standard unit sections is multiple, and the multiple standard unit sections are connected to each other.

[0009] A further improvement of this utility model of a continuous open-pit coal mining system is that the belt conveyor includes a head section, a tail section, a ground frame, and a conveyor belt. The ground frame is located between the head section and the tail section, and the conveyor belt is installed on the head section, the tail section, and the ground frame.

[0010] A further improvement of this utility model's open-pit coal mine continuous mining system is that the coal mining machine includes a main frame, a cutting device, a composite loading device, a scraper conveyor, a second tracked chassis, and an electro-hydraulic system. The main frame is mounted on the second tracked chassis, and the cutting device, the composite loading device, the scraper conveyor, and the electro-hydraulic system are all mounted on the main frame. The electro-hydraulic system provides power to the second tracked chassis, the cutting device, the composite loading device, and the scraper conveyor. The cutting device is used to cut coal, the composite loading device is used to collect coal, and the scraper conveyor is used to transport coal.

[0011] A further improvement of this utility model's open-pit coal mine continuous mining system is that the coal mining machine also includes a crusher, which is fixed on the main frame and used to receive the coal conveyed by the scraper conveyor.

[0012] The application of the technical solution of this utility model has the following beneficial effects: This utility model relates to a continuous open-pit coal mining system. It integrates stripping, mining, loading, and transportation into a continuous operation, utilizing a coal mining machine, a self-propelled conveyor, a transfer conveyor, and a belt conveyor. This solves the problems of discrete processes and long cycles in existing open-pit coal mining technologies. This system eliminates traditional blasting and road transport, changing the intermittent stripping, mining, and transportation processes of traditional open-pit coal mining. It features strong interoperability between equipment, requires fewer operators, is simple to operate, and offers higher safety than traditional processes.

[0013] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is an overall top view of the open-pit coal mine continuous mining system of this utility model; Figure 2 This is a side view of the coal mining machine in the open-pit coal mine continuous mining system of this utility model; Figure 3 This is a side view of the self-propelled conveyor of the open-pit coal mine continuous mining system of this utility model; Figure 4 This is a side view of the transfer conveyor of the open-pit coal mine continuous mining system of this utility model; Figure 5 This is a side view of the belt conveyor in the open-pit coal mine continuous mining system of this utility model; Figure 6 This is a front view of the transfer conveyor of the open-pit coal mine continuous mining system of this utility model.

[0015] Among them, 1. Coal mining machine; 11. Cutting device; 12. Composite loading device; 13. Scraper conveyor; 14. Crusher; 15. Second tracked chassis; 16. Cab; 17. Main frame; 2. Self-propelled conveyor; 21. Electric drum; 22. Idling drum; 23. Idler assembly; 24. Receiving hopper; 25. Discharge hopper; 26. First tracked chassis; 27. Power unit; 28. Support frame; 29. ​​Conveyor belt; 3. Transfer conveyor; 31. Standard unit section; 32. Drive unit section; 33. Driven unit section; 34. Support cylinder; 35. Lateral movement cylinder; 36. Lateral movement guide rail; 37. Second ear plate; 4. Belt conveyor; 41. Head section; 42. Tail section; 43. Ground frame; 44. Conveyor belt. Detailed Implementation

[0016] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] See Figures 1-6 As shown, an open-pit coal mine continuous mining system includes: a coal mining machine 1, a self-propelled conveyor 2, a transfer conveyor 3, and a belt conveyor 4. The belt conveyor 4 and the transfer conveyor 3 are arranged around the periphery of the coal mining area. The coal mined by the coal mining machine 1 is transported to the transfer conveyor 3 via the self-propelled conveyor 2. The transfer conveyor 3 then transports the coal to the belt conveyor 4, which in turn transports the coal to the coal yard.

[0018] In this invention, during mining, the coal mining machine 1 is arranged parallel to and close to the mining line, and mining proceeds back and forth from one end of the mining line to the other. The shifting conveyor 3 is also arranged parallel to the mining line but located outside the platform. The self-propelled conveyor 2 is located between the horizontal double-drum coal mining machine 1 and the self-propelled shifting conveyor 3. Initially, only one self-propelled conveyor 2 is arranged. As the number of mining operations increases, when the distance between the coal mining machine 1 and the shifting conveyor 3 exceeds 25m, another self-propelled conveyor 2 is added for series transportation.

[0019] During mining, the belt conveyor 4, the moving conveyor 3, the self-propelled conveyor 2, and the coal mining machine 1 are started in that order. When stopping, the machines are stopped in the reverse direction. This system requires a minimum of two people to operate: one to operate the moving conveyor 3 and the other to operate the self-propelled conveyor 2. Operation is simple, and an intelligent system can be configured for automated mining as needed. This invention is electrically driven, has great upgrade potential, and with the configuration of corresponding intelligent units, automated mining with few or no personnel can be achieved.

[0020] Preferred, such as Figure 3 As shown, the self-propelled conveyor 2 includes a first tracked chassis 26, a support frame 28, and a feeding assembly. The support frame 28 is connected to the first tracked chassis 26, and the feeding assembly is mounted on the support frame 28. The support frame 28 is rotatably mounted on the first tracked chassis 26, thereby improving the flexibility of coal conveying. The specific rotating mechanism can adopt existing rotating structures, such as a rotary table or a rotary reducer. In this embodiment, the self-propelled conveyor 2 can transport a length of 25m. The power unit 27 uses a lithium iron phosphate battery with a capacity of 90kWh and a range of 24 hours. The self-propelled conveyor 2 is arranged behind the coal mining machine 1. Depending on the distance between the coal mining machine 1 and the transfer conveyor 3, one or more self-propelled conveyors 2 are configured, and the unloading head of the self-propelled conveyor 2 overlaps with the transfer conveyor 3.

[0021] Preferably, the feeding assembly includes a receiving hopper 24, a discharging hopper 25, a conveyor belt, and a drive assembly. The receiving hopper 24 is installed at the first end of the support frame 28, and the discharging hopper 25 is installed at the second end of the support frame 28. The conveyor belt is used to transfer coal from the receiving hopper 24 to the discharging hopper 25, and the drive assembly is used to drive the conveyor belt to move. Specifically, the drive assembly includes a power unit 27, an electric drum 21, a redirecting drum 22, and an idler assembly 23. The electric drum 21 is located on the second end of the support frame 28, the discharging hopper 25 is above the electric drum 21, the redirecting drum 22 is located on the first end of the support frame 28, the receiving hopper 24 is located above the redirecting drum 22, the idler assembly 23 is distributed between the electric drum 21 and the redirecting drum 22, the conveyor belt wraps around the idler assembly 23 in two layers, and the receiving hopper 24 is aligned with the hopper outlet of the crusher 14 of the coal mining machine 1.

[0022] Preferred, such as Figure 4 As shown, the transfer conveyor 3 includes a standard unit section 31, a drive unit section 32, a driven unit section 33, and a conveyor belt 29. The standard unit section 31 is connected between the drive unit section 32 and the driven unit section 33. The conveyor belt 29 is installed on the standard unit section 31, the drive unit section 32, and the driven unit section 33. Each of the standard unit section 31, the drive unit section 32, and the driven unit section 33 has a lateral movement device at its bottom. The lateral movement device on each unit section of the transfer conveyor 3 is driven laterally by a hydraulic cylinder, with a single lateral movement distance of 1.5m. The transfer conveyor 3 is arranged parallel to the outermost edge of the mining line, transferring coal received from the self-propelled conveyor 2 to the tail end 42 of the belt conveyor. Figure 6 As shown, the lateral movement device further includes a lateral movement cylinder 35, a lateral movement guide rail 36, and two support cylinders 34. Taking the lateral movement device installed on the drive unit section 32 as an example, the two support cylinders 34 are respectively fixed on both sides of the drive unit section 32 and are vertically downward. The drive unit section 32 has first ear plates on both sides for mounting the support cylinders 34. A pulley is installed at the bottom of the support cylinder 34. A lateral movement guide rail 36 is detachably installed on the lateral movement path of the transfer conveyor 3 for moving the pulley. The lateral movement cylinder 35 is connected between the lateral movement guide rail 36 and the bottom of the drive unit section 32. A second ear plate 37 is provided on the lateral movement guide rail 36 for connecting the lateral movement cylinder 35. When the entire transfer conveyor needs to be moved laterally, the support cylinders 34 are extended to lift the drive unit section 32, and then the lateral movement cylinders 35 are extended to drive the main frame so that the pulley at the front end of the support cylinder 34 moves on the guide rail, thereby laterally moving the drive unit section 32. After moving into position, retract the support cylinder 34 to lower the drive unit section 32 to the ground, remove the transverse guide rail 36, and then retract the transverse cylinder 35 to drive the transverse guide rail 36 back into position to prepare for the next movement.

[0023] Preferably, there are multiple standard unit sections 31, which are interconnected. Adjacent standard unit sections 31 are hinged to each other via a central pin and an ear plate. The transfer conveyor 3 is arranged in a straight line laterally, and the number of standard unit sections 31 is configured according to the length of the working face, with a maximum length of over 400m.

[0024] Preferred, such as Figure 5 As shown, the belt conveyor 4 includes a head section 41, a tail section 42, a ground frame 43, and a conveyor belt 44. The ground frame 43 is located between the head section 41 and the tail section 42, and the conveyor belt 44 is installed on the head section 41, the tail section 42, and the ground frame 43. Specifically, a drive roller is provided at the tail section 42, and a driven roller is provided at the head section 41. The conveyor belt 44 is wound around the drive roller and the driven roller. The belt conveyor 4 is arranged longitudinally in a straight line on the working face. Its structural relationship is that the tail section 42 is matched with the transfer conveyor 3 to receive materials, and the materials are conveyed to the coal yard at the head section 41 via the conveyor belt 44.

[0025] Preferred, such as Figure 2 As shown, the coal mining machine 1 includes a main frame 17, a cutting device 11, a composite loading device 12, a scraper conveyor 13, a second tracked chassis 15, and an electro-hydraulic system. The main frame 17 is mounted on the second tracked chassis 15. The cutting device 11, the composite loading device 12, the scraper conveyor 13, and the electro-hydraulic system are all mounted on the main frame 17. The electro-hydraulic system provides power to the second tracked chassis 15, the cutting device 11, the composite loading device 12, and the scraper conveyor 13. The cutting device 11 is used to cut coal, the composite loading device 12 is used to collect coal, and the scraper conveyor 13 is used to transport coal. A driver's cab 16 is also provided on the main frame 17 for operators to control the coal mining machine 1.

[0026] Preferably, the coal mining machine 1 further includes a crusher 14, which is fixed to the main frame 17 and used to receive coal conveyed by the scraper conveyor 13. The composite loading device 12 is located below the cutting device 11 and collects the coal cut by the cutting device 11. The scraper conveyor 13 is connected to the composite loading device 12 and conveys the collected coal to the crusher 14. The crushed coal falls onto the conveyor belt of the self-propelled conveyor 2.

[0027] This utility model relates to a continuous open-pit coal mining system. It integrates stripping, mining, loading, and transportation into a continuous operation via a coal mining machine 1, a self-propelled conveyor 2, a moving conveyor 3, and a belt conveyor 4. This solves the problems of discrete processes and long cycles in existing open-pit coal mining technologies. This system eliminates traditional blasting and road transport, changing the intermittent stripping, mining, and transportation processes of traditional open-pit coal mining. It features strong inter-equipment connectivity, requires fewer operators, is simple to operate, and offers higher safety than traditional processes.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A continuous open-pit coal mining system, characterized in that, include: The coal mining machine (1), the self-propelled conveyor (2), the transfer conveyor (3) and the belt conveyor (4) are arranged on the periphery of the coal mining area. The coal mined by the coal mining machine (1) is transported to the transfer conveyor (3) by the self-propelled conveyor (2), and the transfer conveyor (3) transports the coal to the belt conveyor (4). The belt conveyor transports the coal to the coal yard.

2. The open-pit coal mine continuous mining system according to claim 1, characterized in that, The self-propelled transport machine (2) includes a first tracked chassis (26), a support frame (28), and a feeding assembly. The support frame (28) is connected to the first tracked chassis (26), and the feeding assembly is installed on the support frame (28).

3. The open-pit coal mine continuous mining system according to claim 2, characterized in that, The feeding assembly includes a receiving hopper (24), a discharging hopper (25), a conveyor belt, and a drive assembly. The receiving hopper (24) is installed at the first end of the support frame (28), the discharging hopper (25) is installed at the second end of the support frame (28), the conveyor belt is used to transfer the coal from the receiving hopper (24) to the discharging hopper (25), and the drive assembly is used to drive the conveyor belt to move.

4. The open-pit coal mine continuous mining system according to claim 1, characterized in that, The transfer conveyor (3) includes a standard unit section (31), a drive unit section (32), a driven unit section (33), and a conveyor belt (29). The standard unit section (31) is connected between the drive unit section (32) and the driven unit section (33). The conveyor belt (29) is installed on the standard unit section (31), the drive unit section (32), and the driven unit section (33). The bottom of the standard unit section (31), the drive unit section (32), and the driven unit section (33) are all provided with a transverse movement device.

5. The open-pit coal mine continuous mining system according to claim 4, characterized in that, The number of the standard unit sections (31) is multiple, and the multiple standard unit sections (31) are connected to each other.

6. The open-pit coal mine continuous mining system according to claim 1, characterized in that, The belt conveyor (4) includes a head (41), a tail (42), a landing frame (43) and a conveyor belt (44). The landing frame (43) is located between the head (41) and the tail (42), and the conveyor belt (44) is installed on the head (41), the tail (42) and the landing frame (43).

7. The open-pit coal mine continuous mining system according to claim 1, characterized in that, The coal mining machine (1) includes a main frame (17), a cutting device (11), a composite loading device (12), a scraper conveyor (13), a second tracked chassis (15), and an electro-hydraulic system. The main frame (17) is mounted on the second tracked chassis (15). The cutting device (11), the composite loading device (12), the scraper conveyor (13), and the electro-hydraulic system are all mounted on the main frame (17). The electro-hydraulic system is used to provide power to the second tracked chassis (15), the cutting device (11), the composite loading device (12), and the scraper conveyor (13). The cutting device (11) is used to cut coal, the composite loading device (12) is used to collect coal, and the scraper conveyor (13) is used to transport coal.

8. The open-pit coal mine continuous mining system according to claim 7, characterized in that, The coal mining machine (1) also includes a crusher (14), which is fixed on the main frame (17) and used to receive coal conveyed by the scraper conveyor (13).

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