Strip mine conveying system

Abstract

The invention provides a strip mine conveying system, and belongs to the technical field of strip mine equipment. The strip mine conveying system comprises a large-span beam and a lifting tower, the large-span beam comprises a conveying main beam and a first conveying belt, and the first conveying belt extends from the first end of the conveying main beam to the second end of the conveying main beam; the lifting tower comprises a supporting platform, a lifting platform and conveying equipment, the supporting platform and the lifting platform are arranged at intervals, the first end of the conveying main beam is located on the supporting platform, a beam body between the first end and the second end of the conveying main beam is located on the lifting platform, and the conveying equipment is located on the supporting platform. The conveying equipment is used for conveying minerals to the first end of the conveying main beam. The purpose of continuously conveying minerals is achieved, and the conveying cost is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of open-pit mining equipment technology, and in particular to an open-pit mine conveying system. Background Technology

[0002] The vast majority of open-pit mines, both domestically and internationally, have ore resources located at a certain depth below the surface. To address challenges such as limited mining space, uneven ore size, and high requirements for operational flexibility, domestic open-pit mines are actively exploring more efficient transportation solutions.

[0003] In related technologies, the vast majority of open-pit mines adopt a semi-continuous mining process using mine trucks for transportation. This semi-continuous mining process combines intermittent loading and unloading by single-bucket excavators with intermittent transportation using mine trucks.

[0004] However, this technology has several prominent problems in actual operation: during the mining process, the mining trucks need to be transported uphill continuously, the transportation distance is generally long, and the mining trucks themselves suffer from continuous wear and tear. This leads to high transportation costs for the mining trucks and increased maintenance expenses, which will hinder the development of open-pit mines towards green, low-carbon, economical, and efficient directions. Summary of the Invention

[0005] This disclosure provides an open-pit mine conveying system that enables continuous mineral transport while reducing transport costs. The technical solution is as follows: This disclosure provides an open-pit mine conveying system, comprising: a large-span beam and a lifting tower; the large-span beam comprising: a main conveying beam and a first conveyor belt extending from a first end to a second end of the main conveying beam; the lifting tower comprising: a support platform, a lifting platform, and conveying equipment; the support platform and the lifting platform being arranged at intervals; the first end of the main conveying beam being located on the support platform; the beam between the first end and the second end of the main conveying beam being located on the lifting platform; and the conveying equipment being located on the support platform, used to convey minerals to the first end of the main conveying beam.

[0006] In one implementation of this disclosure, the lifting platform includes: a platform body, pile legs, and a lifting mechanism. The platform body has a fixed pile opening through which the pile legs pass, and the pile legs are movably inserted into the fixed pile opening. The lifting mechanism is located on the platform body and is used to drive the platform body to move axially along the pile legs.

[0007] In another implementation of this disclosure, the lifting platform further includes a traveling mechanism, which includes a traveling post, outriggers, and a lifting cylinder. The top end of the outrigger is connected to the bottom end of the outrigger leg, and the bottom end of the outrigger has a cavity extending towards the top. The top end of the traveling post is movably inserted into the cavity. The lifting cylinder is located within the cavity, with one end connected to the inner wall of the outrigger and the other end connected to the traveling post. The conveying device includes a second conveyor belt and a third conveyor belt. The first end of the second conveyor belt is located at the bottom of the support platform, and the second end of the second conveyor belt is located on the outrigger. The first end of the third conveyor belt is located on the outrigger and connected to the second end of the second conveyor belt via a transition structure. The second end of the third conveyor belt is located at the top of the support platform and connected to the first end of the conveying main beam via a transition structure.

[0008] In another implementation of the present disclosure, the bottom end of the walking pile is provided with a moving device.

[0009] In another implementation of this disclosure, the long-span beam further includes: a first connecting support, a second connecting support, and a third connecting support; the first connecting support and the second connecting support are respectively located at the first end and the second end of the conveying main beam, the first connecting support is also located on the support platform, the third connecting support is located on the conveying main beam and between the first connecting support and the second connecting support, and the third connecting support is also located on the lifting platform; the third connecting support includes: a first base and a first sliding plate, the first sliding plate is located on the top surface of the first base, and the first sliding plate is slidably connected to the top surface of the first base in a direction perpendicular to the central axis of the conveying main beam, and the first sliding plate is connected to the conveying main beam.

[0010] In another implementation of the present disclosure, both the first connecting support and the second connecting support include: a second base and a second sliding plate, the second sliding plate being located on the top surface of the second base, and the second sliding plate and the top surface of the second base being slidably connected axially along the central axis of the conveying main beam, and the second sliding plate being connected to the end of the conveying main beam.

[0011] In another implementation of the present disclosure, the open-pit mine conveying system further includes a material distribution mechanism, which includes a material distribution conveyor belt, a traveling frame, fixed piles, and movable piles. The fixed piles and movable piles are all located on the same side of the traveling frame. The second end of the main conveying beam is located at the top of the traveling frame, and the material distribution conveyor belt is located below the traveling frame. The first conveyor belt is connected to the material distribution conveyor belt through a transition structure. The movable piles are used to drive the traveling frame to move.

[0012] In another implementation of this disclosure, the movable pile includes: a guide tube, a traveling leg, a lifting cylinder, a sliding cylinder, and a sliding plate; one end of the guide tube is connected to the traveling frame, the top end of the traveling leg is movably inserted into the guide tube, the lifting cylinder is located inside the guide tube, and both ends of the lifting cylinder are respectively connected to the top ends of the traveling frame and the traveling leg, the sliding plate is located at the bottom end of the traveling leg, the sliding cylinder is located between the sliding plate and the traveling leg, and the extension and retraction direction of the sliding cylinder is parallel to the surface of the sliding plate, and both ends of the sliding cylinder are respectively connected to the bottom end of the traveling leg and the sliding plate.

[0013] In another implementation of the present disclosure, the open-pit mine conveying system further includes a crushing mechanism, which includes a feed hopper, a feed conveyor belt, and a crusher. The feed conveyor belt is connected between the feed hopper and the crusher through a transition structure, and the discharge port of the crusher is connected to the conveying equipment through the transition structure.

[0014] In another implementation of this disclosure, the inclination angle of the main conveying beam is greater than or equal to 20°.

[0015] The beneficial effects of the technical solutions provided in this disclosure include at least the following: In the open-pit mine conveying system provided in this embodiment, the two ends of the main conveying beam of the large-span beam are anchored to the bottom and top steps of the mine, respectively, and the mineral is transported using a first transmission belt on the main conveying beam. The open-pit mine conveying system replaces the intermittent transport of mining trucks with a continuously conveying first transmission belt, achieving seamless transfer of minerals from the bottom to the top of the mine. This eliminates the heavy-load uphill climbing stage for mining trucks, compressing the transport distance to the shortest path. This not only significantly reduces tire wear and fuel consumption of the mining trucks but also reduces start-stop energy consumption through continuous operation, thus saving transportation costs.

[0016] Meanwhile, a lifting platform is installed in the middle section of the main conveyor beam. By raising / lowering the middle section of the main conveyor beam using the lifting platform, the inclination angle of the first transmission belt can be adjusted in real time. When faced with changes in the slope angle of the mining area or temporary material storage needs, operators only need to adjust the height of the lifting platform without modifying the infrastructure. This improves the deployment efficiency of the equipment in complex terrain and gives the open-pit mine conveying system terrain adaptability.

[0017] Furthermore, the mining trucks only transport minerals to the conveying equipment in flat areas, completely avoiding the risks of driving on steep slopes. The conveying equipment can connect with the mining trucks, allowing the bottom mining face to retain the combination of excavators and short-distance mining trucks, ensuring that front-end mining is not constrained by the conveying system and maintaining process flexibility. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of an open-pit mine conveying system provided in an embodiment of this disclosure; Figure 2 This is a top view of an open-pit mine conveying system provided in an embodiment of this disclosure; Figure 3 This is a partially enlarged schematic diagram of a lifting platform provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of the structure of a lifting tower provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of a third connecting support provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of a conveying main beam being horizontally deflected to the right, provided in an embodiment of this disclosure; Figure 7 This is a schematic diagram of a conveying main beam being horizontally deflected to the left, provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of the connection between a first sliding plate and a first base provided in an embodiment of this disclosure; Figure 9 This is a schematic diagram of the structure of a first connecting support provided in an embodiment of this disclosure; Figure 10 This is a schematic diagram of the structure of a first connecting support provided in an embodiment of this disclosure; Figure 11 This is a front view of a material dispensing mechanism provided in an embodiment of this disclosure; Figure 12 This is a side view of a material dispensing mechanism provided in an embodiment of this disclosure; Figure 13 This is a front view of a crushing mechanism provided in an embodiment of this disclosure.

[0020] The markings in the diagram are explained as follows: 10. Main conveyor beam; 11. First conveyor belt; 12. First connecting support; 121. Second base; 122. Second sliding plate; 123. Sliding cylinder; 13. Second connecting support; 14. Third connecting support; 141. First base; 142. First sliding plate; 101. Sliding groove; 102. Limiting slider; 103. Ball seat; 104. Ball joint; 105. Spherical groove; 15. Reinforcing arch; 16. Supporting ribs; 17. Electromagnet; 18. Permanent magnet; 21. Supporting platform; 22. Lifting platform; 220. Pile anchorage; 221. Platform body; 222. Pile legs; 223. Lifting mechanism; 2231. Fixed ring beam; 2232. Telescopic cylinder; 2233. Moving ring beam; 224. Walking post; 225. Outrigger; 226. Lifting cylinder; 227. Moving device; 23. Conveying equipment; 231. Second conveyor belt; 232. Third conveyor belt; 30. Material distribution mechanism; 31. Material distribution conveyor belt; 32. Traveling frame; 33. Fixed pile; 34. Moving pile; 341. Guide tube; 342. Traveling outrigger; 343. Lifting cylinder; 344. Sliding cylinder; 345. Sliding plate; 40. Crushing mechanism; 41. Feed hopper; 42. Feed conveyor belt; 43. Crusher. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0022] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” “top,” and “bottom,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0023] Figure 1 This is a front view of an open-pit mine conveying system provided in an embodiment of this disclosure. Figure 2 This is a top view of an open-pit mine conveying system provided in an embodiment of this disclosure. Figure 1 , 2 As shown, the open-pit mine conveying system includes a large-span beam and a hoisting tower. The large-span beam includes a main conveying beam 10 and a first conveyor belt 11, which extends from a first end of the main conveying beam 10 to a second end.

[0024] like Figure 1 , 2 As shown, the lifting tower includes a support platform 21, a lifting platform 22, and a conveying device 23. The support platform 21 and the lifting platform 22 are arranged at intervals. The first end of the conveying main beam 10 is located on the support platform 21, and the beam between the first end and the second end of the conveying main beam 10 is located on the lifting platform 22. The conveying device 23 is located on the support platform 21 and is used to convey minerals to the first end of the conveying main beam 10.

[0025] In the open-pit mine conveying system provided in this embodiment, the main conveying beam 10 of the large-span beam is anchored at both ends to the bottom and top steps of the mine, and the mineral is transported using a first transmission belt on the main conveying beam 10. The open-pit mine conveying system replaces the intermittent transport of mining trucks with a continuously conveying first transmission belt, achieving seamless transfer of minerals from the bottom to the top of the mine. This eliminates the heavy-load uphill climbing stage for mining trucks, compressing the transport distance to the shortest path. This not only significantly reduces tire wear and fuel consumption of mining trucks but also reduces start-stop energy consumption through continuous operation, saving transportation costs.

[0026] Meanwhile, a lifting platform 22 is installed in the middle area of ​​the main conveyor beam 10. By raising / lowering the middle section of the main conveyor beam 10 through the lifting platform 22, the inclination angle of the first transmission belt can be adjusted in real time. When facing changes in the slope angle of the mining area or temporary material storage needs, the operator only needs to adjust the height of the lifting platform 22. There is no need to modify the infrastructure, which can improve the deployment efficiency of the equipment in complex terrain and give the open-pit mine conveying system terrain adaptability.

[0027] Furthermore, the mining trucks only transport minerals to the conveying equipment 23 in flat areas, completely avoiding the risks of the mining trucks traveling on steep slopes. The conveying equipment 23 can connect with the mining trucks, allowing the bottom mining face to retain the combination of excavators and short-distance mining trucks, ensuring that the front-end mining is not constrained by the conveying system and maintaining process flexibility.

[0028] Figure 3 This is a partially enlarged schematic diagram of a lifting platform 22 provided in an embodiment of this disclosure. For example... Figure 1 , 3 As shown, the lifting platform 22 includes: a platform body 221, pile legs 222 and a lifting mechanism 223. The platform body 221 has a fixed pile opening 220 for the pile legs 222 to pass through. The pile legs 222 are movably inserted into the fixed pile opening 220. The lifting mechanism 223 is located on the platform body 221 and is used to drive the platform body 221 to move along the axial direction of the pile legs 222.

[0029] In the above implementation, the pile leg 222 is used as a rigid guide column, penetrating the platform body 221 through the fixed pile opening 220 to form a constraint. This ensures that the platform body 221 moves strictly along the axial direction during lifting and lowering, avoiding skew and swaying. This provides a stable mechanical basis for adjusting the inclination angle of the conveying main beam 10 and ensures the continuity of material transportation. At the same time, the lifting mechanism 223 drives the platform body 221 to move linearly along the axial direction of the pile leg 222. It can flexibly adjust the height of the middle section of the conveying main beam 10 according to the height difference between the mine bottom and the mine top bench, quickly matching the inclination angle requirements of different mining stages.

[0030] By setting up a lifting platform 22, when the height difference between the mine top step and the mine bottom step changes, the lifting platform 22 will be raised or lowered to ensure that the conveying main beam 10 does not detach from the support platform 21.

[0031] For example, the platform body 221 adopts an I-beam steel structure, which has high strength and lightweight characteristics, and meets the requirements of heavy load bearing.

[0032] Among them, the fixed pile opening 220 is opened at the four corners of the I-shaped structure, serving as the movement channel of the pile leg 222; guide rings are installed at the upper and lower ends of the fixed pile opening 220 to provide precise guidance for the platform body 221 to move along the pile leg 222 and prevent deviation.

[0033] For example, the guide ring is made of an alloy material, which is more wear-resistant.

[0034] A boss can be provided on the upper surface of the platform body 221. The boss is used to directly support the second end of the conveying main beam 10 and transmit the material load.

[0035] like Figure 3 As shown, the lifting mechanism 223 is installed inside the fixed pile opening 220, forming a linkage space with the pile leg 222.

[0036] Among them, multiple sets of pin holes are evenly opened on the side wall of the pile leg 222 for locking with the pin assembly of the lifting mechanism 223.

[0037] For example, the axial spacing of the pin holes can be set according to the lifting accuracy requirements. For instance, the axial spacing of the pin holes is 50 cm.

[0038] like Figure 3 As shown, the lifting mechanism 223 includes: a fixed ring beam 2231, a telescopic cylinder 2232, a moving ring beam 2233, and a pin assembly.

[0039] The fixed ring beam 2231 is suspended inside the fixed pile opening 220, near the upper end of the fixed pile opening 220, and serves as the fixed support point for the telescopic cylinder 2232. The moving ring beam 2233 has a pin assembly on its side. The telescopic cylinder 2232 is a hydraulically driven linear actuator, and the cylinder body of the telescopic cylinder 2232 is hinged to the fixed ring beam.

[0040] Among them, the moving ring beam 2233 is located below the fixed ring beam 2231. The moving ring beam 2233 is connected to the piston rod of the telescopic cylinder 2232 and can move up and down with the extension and retraction of the piston rod. A pin assembly is provided on the side of the moving ring beam 2233.

[0041] In this embodiment of the disclosure, the process by which the lifting platform 22 drives the platform body 221 to rise and fall is as follows: If the platform body 221 needs to be raised, first insert the pin assembly of the moving ring beam into the pin hole of the pile leg 222 at its current position to lock the moving ring beam and the pile leg 222. At the same time, retract the pin assembly of the fixed ring beam to release the lock between the fixed ring beam and the pile leg 222.

[0042] When the telescopic cylinder is activated, the piston rod extends, causing the fixed ring beam to move upward along the pile leg 222. Since the fixed ring beam is fixedly connected to the platform body 221, the platform body 221 rises synchronously.

[0043] Once the platform body 221 reaches the target height, the pin assembly of the fixed ring beam is inserted into the pin hole at the new position of the pile leg 222 to lock the fixed ring beam. At the same time, the pin assembly of the moving ring beam retracts to release the moving ring beam from locking, completing one lifting cycle.

[0044] Figure 4 This is a schematic diagram of a lifting tower provided in an embodiment of this disclosure. Figure 4 As shown, the lifting platform 22 also includes a traveling mechanism, which includes a traveling post 224, outriggers 225 and a lifting cylinder 226. The top end of the outrigger 225 is connected to the bottom end of the outrigger leg 222. The bottom end of the outrigger 225 has a cavity extending to the top end. The top end of the traveling post 224 is movably inserted into the cavity.

[0045] like Figure 4 As shown, the lifting cylinder 226 is located inside the cavity. One end of the lifting cylinder 226 is connected to the inner wall of the outrigger 225, and the other end of the lifting cylinder 226 is connected to the traveling post 224.

[0046] like Figure 4 As shown, the conveying device 23 includes a second conveyor belt 231 and a third conveyor belt 232. The first end of the second conveyor belt 231 is located at the bottom of the support platform 21, and the second end of the second conveyor belt 231 is located on the support leg 225. The first end of the third conveyor belt 232 is located on the support leg 225 and is connected to the second end of the second conveyor belt 231 through a transition structure. The second end of the third conveyor belt 232 is located at the top of the support platform 21, and the second end of the third conveyor belt 232 is connected to the first end of the conveying main beam 10 through a transition structure.

[0047] In the above implementation, the lifting cylinder 226 drives the traveling pile 224 to extend and retract within the cavity of the outrigger 225, enabling the overall step-like movement of the lifting platform 22. When the traveling pile 224 touches the ground for support, the lifting cylinder 226 can drive the outrigger 225 to rise and fall without the need for external traction equipment. This allows the transmission belt of the conveying equipment 23 to move flexibly, adapting to the dynamic expansion needs of the mining area. At the same time, the outrigger 225 is rigidly connected to the pile leg 222, ensuring the levelness of the platform during movement and guaranteeing the stability of the conveying main beam 10.

[0048] Furthermore, the second and third conveyor belts, together with the transition structure, form a transfer conveying link, allowing materials to be transported in layers via the two drive belts to accommodate different height differences and avoid transportation interruptions. When the lifting cylinder 226 can drive the outriggers 225 to rise and fall, it can also adjust the inclination angle of the second and third drive belts so that the drive belts can transport minerals to the first drive belt at different heights.

[0049] For example, the transition structure can be a chute that connects to the conveyor belt to ensure smooth connection of the conveyor belt and reduce material spillage.

[0050] Optionally, such as Figure 4 As shown, the bottom end of the walking post 224 is equipped with a moving device 227.

[0051] Because open-pit mining is carried out in a stepped manner, the mine boundary and bench height constantly change with the development process, and the position of large-span beams needs to be adjusted synchronously to maintain effective coverage. By setting up a mobile device 227, the lifting platform 22 is freed from the limitation of a fixed base and can move autonomously as the mining area expands or contracts, avoiding the failure of the conveying system due to changes in the mine pit shape and ensuring that the logistics link always matches production needs.

[0052] For example, the mobile device 227 may be a tracked vehicle. Tracked vehicles are better suited to the complex working conditions of mines, have strong terrain adaptability, and have a large ground contact area, which can effectively disperse the pressure of heavy loads on soft, gravelly, or undulating ground and prevent vehicles from getting stuck. Tracked vehicles have outstanding traction and stability, and the toothed structure of the track plates meshes tightly with the ground, providing good climbing ability.

[0053] Optionally, such as Figure 1 , 2 As shown, the long-span beam also includes: a first connecting support 12, a second connecting support 13, and a third connecting support 14.

[0054] like Figure 1 , 2 As shown, the first connecting support 12 and the second connecting support 13 are located at the first end and the second end of the conveying main beam 10, respectively. The first connecting support 12 is also located on the support platform 21. The third connecting support 14 is located on the conveying main beam 10 and between the first connecting support 12 and the second connecting support 13. The third connecting support 14 is also located on the lifting platform 22.

[0055] Figure 5 This is a schematic diagram of the structure of a third connecting support 14 provided in an embodiment of this disclosure. Figure 5 As shown, the third connecting support 14 includes: a first base 141 and a first sliding plate 142. The first sliding plate 142 is located on the top surface of the first base 141, and the first sliding plate 142 and the top surface of the first base 141 are slidably connected in a direction perpendicular to the central axis of the conveying main beam 10. The first sliding plate 142 is connected to the conveying main beam 10.

[0056] The first connecting support 12 and the second connecting support 13 at both ends of the main conveying beam 10 are anchored to the bottom bench and the top bench of the mine, respectively, to provide basic support. The third connecting support 14 is located in the middle of the main conveying beam 10 and is connected to the main conveying beam 10 through a horizontal sliding joint. When changes in terrain cause a difference in lateral or longitudinal displacement between the supports at both ends, the third connecting support 14 and the main conveying beam 10 can slide freely in the horizontal direction, actively absorbing the stress caused by the asynchronous displacement at both ends.

[0057] Figure 6 This is a schematic diagram of a conveying main beam 10 being horizontally deflected to the right, provided in an embodiment of this disclosure. Figure 7This is a schematic diagram illustrating the horizontal leftward deviation of the main conveying beam 10 according to an embodiment of this disclosure. Figures A and B indicate the state where the main conveying beam 10 has not deviated, as shown below. Figure 6 , 7 As shown, when the top bench shifts horizontally due to mining progress, while the bottom bench has not moved synchronously, the top of the conveying main beam 10 will shift left and right. At this time, the sliding between the third connecting support 14 and the conveying main beam 10 allows the conveying main beam 10 to deflect slightly, maintaining the straightness of the central axis and preventing torsional deformation caused by rigid constraints. Therefore, the sliding compensation of the third support ensures that the conveying main beam 10 always maintains an approximately straight posture, reducing the lateral impact force and improving the reliability of the large-span mineral conveying main beam 10.

[0058] In the above implementation, the first sliding plate 142 slides along the direction perpendicular to the central axis of the conveying main beam 10, which can directly absorb lateral displacement deviation. The first sliding plate 142 is connected to the conveying main beam 10, and accurately transmits the compensation displacement to the middle of the conveying main beam 10, ensuring that the straightness correction of the central axis is more direct and efficient.

[0059] The first base 141 serves as a fixed foundation, providing stable load-bearing capacity. The first sliding plate 142 is slidably connected to the first base 141, enabling lateral sliding. This separate design allows the first base 141 to be fixed on-site first, and then the initial position of the first sliding plate 142 to be finely adjusted according to the actual position of the main conveyor beam 10, resulting in a higher installation tolerance. If the sliding plate wears out later, the sliding plate assembly can be replaced separately without disassembling the entire support, reducing maintenance costs and time.

[0060] Optionally, one of the surface of the first sliding plate 142 and the top surface of the first base 141 is provided with a sliding groove 101, and the other of the surface of the first sliding plate 142 and the top surface of the first base 141 is provided with a limiting slider 102. The limiting slider 102 is slidably disposed in the sliding groove 101, and the extending direction of the sliding groove 101 is perpendicular to the central axis of the conveying main beam 10.

[0061] Figure 8 This is a schematic diagram showing the connection between a first sliding plate 142 and a first base 141 according to an embodiment of this disclosure. Figure 8 As shown, the first sliding plate 142 has a limiting slider 102 on its surface, and the top surface of the first base 141 has a sliding groove 101, with the limiting slider 102 slidably disposed in the sliding groove 101.

[0062] In the above implementation, the extension direction of the sliding groove 101 is perpendicular to the central axis of the conveying main beam 10, and the limiting slider 102 is embedded in the groove to slide, constraining the sliding trajectory to a single lateral direction, thus avoiding possible skewing or jamming during planar sliding. Compared with a guideless sliding pair, this implementation controls the lateral displacement error to the millimeter level, ensuring more accurate straightness correction of the central axis during offset compensation of the conveying main beam 10.

[0063] For example, the opening of the sliding groove 101 can be provided with a dustproof lip to prevent dust and rainwater from entering the sliding interface. The fit clearance between the limiting slider 102 and the sliding groove 101 can be adjusted by machining precision to reduce wear. Maintenance only requires checking whether the groove is dusty and whether the slider is loose, without complicated adjustments, making it suitable for harsh mining environments.

[0064] Optionally, such as Figure 8 As shown, an electromagnet 17 can be installed at the bottom of the sliding groove 101, and a permanent magnet 18 can be installed on the surface of the limiting slider 102 opposite to the bottom of the sliding groove 101.

[0065] When relative sliding between the first sliding plate 142 and the first base 141 is not required, the electromagnet can be energized to generate a magnetic field opposite to the magnetic pole of the permanent magnet 18, thus creating an attractive force between the first sliding plate 142 and the first base 141. This attractive force increases the normal pressure on the contact surface between the first sliding plate 142 and the first base 141, thereby suppressing relative sliding between them.

[0066] When relative sliding between the first sliding plate 142 and the first base 141 is required, the electromagnet can be energized to generate a magnetic field with the same polarity as the permanent magnet 18, thus creating a repulsive force between the first sliding plate 142 and the first base 141. This repulsive force reduces the normal pressure on the contact surface between the first sliding plate 142 and the first base 141, thereby facilitating relative sliding between them.

[0067] Optionally, the surface of the first sliding plate 142 is provided with a limiting slider 102, and the top surface of the first base 141 is provided with a sliding groove 101. A liquid metal film can be injected into the bottom of the limiting groove to form a lubricating layer.

[0068] For example, the thickness of the liquid metal film is 0.1 mm to 0.3 mm, and the liquid metal film can be a gallium-based liquid metal, such as a GaInSn alloy.

[0069] Multiple electromagnetic coil arrays are embedded within the first base 141, with the coils located below the bottom of the limiting groove. A directional traveling wave magnetic field is generated through phase difference control. The magnetic field direction is strictly parallel to the lateral movement direction of the first sliding plate 142, forming a continuous magnetic wave propulsion. When the traveling wave magnetic field acts on the liquid metal, eddy currents are induced. The interaction between the eddy currents and the magnetic field generates a Lorentz force, which propels the liquid metal to continuously flow along the direction of magnetic field movement. This facilitates relative sliding between the first sliding plate 142 and the first base 141.

[0070] Furthermore, the self-lubricating properties of liquid metal reduce the coefficient of friction to below 0.001, and it has good high-temperature stability, making it suitable for harsh working conditions in mining areas. At the same time, the flowing liquid metal can flush out dust particles in the gaps and prevent jamming.

[0071] Figure 9 This is a schematic diagram of the structure of a first connecting support 12 provided in an embodiment of this disclosure. Figure 9 As shown, both the first connecting support 12 and the second connecting support 13 include: a second base 121 and a second sliding plate 122. The second sliding plate 122 is located on the top surface of the second base 121, and the second sliding plate 122 and the top surface of the second base 121 are slidably connected in the axial direction of the central axis of the conveying main beam 10. The second sliding plate 122 is connected to the end of the conveying main beam 10.

[0072] The first connecting support 12 and the second connecting support 13 both adopt the axial sliding design of the second base 121 and the second sliding plate 122, which complements the lateral sliding of the third connecting support 14 and can realize the height adaptive compensation of the large span conveying beam.

[0073] In open-pit mining, height differences can easily arise between the mine floor and roof benches due to undulating ore layers and the progress of stripping, such as one side of the bench sinking or the other side rising due to mining. The second sliding plate 122 is axially connected to the second base 121 along the central axis, allowing the two ends of the conveyor beam 10 to automatically rise and fall with changes in bench height, avoiding bending or breakage of the conveyor beam 10 caused by rigid fixing. For example, when the mine roof bench rises, the second sliding plate 122 and the first base 141 slide relative to each other circumferentially along the central axis, maintaining the overall posture of the conveyor beam 10 and releasing the bending moment generated by the vertical displacement difference. Furthermore, the slidable connection between the second sliding plate 122 and the second base 121 allows the second sliding plate 122 to adaptively adjust in real time if the bench height continues to change, without manual intervention, thus improving the system's response speed to terrain dynamics.

[0074] Optionally, one of the surface of the second sliding plate 122 and the top surface of the second base 121 is provided with a sliding groove 101, and the other of the surface of the second sliding plate 122 and the top surface of the second base 121 is provided with a limiting slider 102. The limiting slider 102 is slidably disposed in the sliding groove 101, and the extending direction of the sliding groove 101 is parallel to the central axis of the conveying main beam 10.

[0075] In the above implementation, the sliding groove 101 constrains the sliding trajectory to the axial direction of the conveying main beam 10, ensuring that both ends of the conveying main beam 10 can accurately rise and fall with the changes in the height of the mine bottom / mine top steps, achieving height self-adaptation of the large-span beam and releasing vertical stress. Furthermore, the engagement of the limiting slider 102 with the sliding groove 101 prevents the sliding plate from detaching from the base under vibration and impact, avoiding beam instability and ensuring operational safety under complex open-pit mine conditions.

[0076] Figure 10 This is a schematic diagram of the structure of a first connecting support provided in an embodiment of this disclosure. Figure 10 As shown, the first connecting support may include: a second base 121 and a second sliding plate 122. The second sliding plate 122 is located on the top surface of the second base 121, and the second sliding plate 122 and the top surface of the second base 121 are slidably connected in the axial direction of the central axis of the conveying main beam 10. The second sliding plate 122 is connected to the end of the conveying main beam 10.

[0077] For example, both the first connecting support 12 and the second connecting support 13 adopt the axial sliding design of the second base 121 and the second sliding plate 122, which complements the lateral sliding of the third connecting support 14, and can realize the height adaptive compensation of the large span conveying beam.

[0078] like Figure 10 As shown, the first connecting support may also include a sliding cylinder 123, the cylinder body of which is connected to the second sliding plate 122, and the piston rod of the sliding cylinder 123 abuts against the ball joint 104 of the second base 121.

[0079] For example, multiple sliding cylinders 123 can be provided, and multiple sliding cylinders 123 are arranged side by side.

[0080] Under the action of hydraulic oil, the sliding cylinder 123 locks the second sliding plate 122 and the second base 121 in a relatively fixed horizontal position. At this time, the second sliding plate 122 and the second base 121 cannot slide. When the second sliding plate 122 and the second base 121 need to slide relative to each other, the sliding cylinders 123 symmetrically arranged on both sides of the second base 121 can extend and retract, so that the second sliding plate 122 slides relative to the second base 121.

[0081] It should be noted that the first base 141 and the first sliding plate 142 of the third connecting support can also achieve lateral displacement through a sliding cylinder. The arrangement of the sliding cylinder of the third connecting support is similar to that of the sliding cylinder of the first connecting support, and will not be described in detail in this embodiment.

[0082] Optionally, both the first base 141 and the second base 121 include a ball seat 103 and a ball hinge 104, with the ball seat 103 and the ball hinge 104 spherically connected. The surface of the ball hinge 104 of the first base 141, away from the base, is slidably connected to the first sliding plate 142. The surface of the ball hinge 104 of the second base 121, away from the base, is slidably connected to the second sliding plate 122.

[0083] In this embodiment, the ball joint connection allows the ball joint 104 to rotate slightly in any direction around the center of the ball seat 103. When the height difference between the bottom and top steps of the mine changes, the conveying main beam 10 needs to adjust its tilt angle by rotating the ball seat 103 of the third connecting support 14. At the same time, the conveying main beam 10 at the connecting supports at both ends of the conveying main beam 10 rotates synchronously at the same angle to adapt to the change in step height, avoiding beam bending or breakage caused by rigid connection.

[0084] When the height difference between the steps where the first connecting support 12 and the second connecting support 13 are located changes, the coordinated action of multiple components can achieve adaptive compensation of the height of the main conveying beam 10. The process is as follows: First, the lifting platform 22 will actively raise or lower its own height according to changes in the height difference to ensure that the main conveying beam 10 and the three connecting supports remain reliably connected, preventing the main conveying beam 10 from disengaging from the connecting supports due to step misalignment. Based on this, the main conveying beam 10 will rotate around the ball seat 103 of the third connecting support 14 at a certain angle to adapt to the adjustment requirements of the overall height difference.

[0085] Simultaneously, the main conveying beam 10 sections at the first connecting support 12 and the second connecting support 13 will rotate synchronously with the main conveying beam 10 as a whole, ensuring the coordinated and unified posture of the main conveying beam 10. During this process, the main conveying beam 10 will also undergo relative displacement with the first connecting support 12 and the second connecting support 13 along its own central axis. This displacement does not occur independently, but rather coordinates with the rotational action to jointly absorb the linear cumulative effect caused by the step height difference, ultimately achieving a dynamic compensation function in the height direction. This avoids structural damage caused by rigid constraints and ensures the stable operation of the conveying system.

[0086] Optionally, one surface of the ball seat 103 has a spherical groove 105, and the end of the ball hinge 104 near the ball seat 103 is spherical, and the spherical end of the ball hinge 104 is rotatably disposed in the spherical groove 105.

[0087] In the above implementation, the spherical groove 105 of the ball seat 103 provides a containment space for the spherical end, allowing the ball hinge 104 to rotate slightly in any direction around the center of the ball. This matches the posture adjustment requirements of the main conveying beam 10 rotating around the ball seat 103 of the third connecting support 14 and the synchronous rotation of the beam segments at both ends at the same angle, adapting to changes in the step height difference. The spherical contact ensures that the load is evenly distributed along the arc surface, avoiding stress concentration in rigid connections and ensuring connection reliability. At the same time, the spherical pair has a built-in self-aligning function, which can tolerate minor alignment errors during installation, improving the fault tolerance rate during on-site construction. Combined with the sealing design, it can also resist dust erosion and maintain rotational flexibility over a long period of time.

[0088] Optionally, such as Figure 1 As shown, the long-span mineral conveying beam also includes: a reinforcing arch 15 and multiple supporting ribs 16. The reinforcing arch 15 is arc-shaped, with one end of the reinforcing arch 15 located at the end of the conveying main beam 10 and the other end of the reinforcing arch 15 located between the two ends of the conveying main beam 10. Multiple supporting members are located between the reinforcing arch 15 and the conveying main beam 10, and the two ends of each supporting member are connected to the reinforcing arch 15 and the conveying main beam 10, respectively.

[0089] By setting the reinforcing arch 15 to be arc-shaped and bridging the ends and middle of the main conveying beam 10, and cooperating with multiple support members to form a synergistic force-bearing system, the bending stiffness can be enhanced. The arc-shaped reinforcing arch 15 converts the vertical bending moment borne by the main beam at the mid-span into the axial pressure of the arch, which greatly reduces the risk of deflection deformation of the main beam and is suitable for large-span heavy-load scenarios. At the same time, the structural stability is improved. The support members connect the reinforcing arch 15 and the main beam at multiple points to form a triangular stable frame similar to a truss, which resists the torsional load of the conveying beam during offset / height compensation and avoids beam twisting.

[0090] Optionally, such as Figure 2 As shown, the main conveyor beam 10 is equipped with two parallel first conveyor belts 11. The parallel double first conveyor belts 11 can work independently. If one side fails, the other side can still continue to operate, ensuring the continuity of conveying. During normal operation, the bandwidth is doubled, increasing the conveying capacity per unit time and adapting to the peak demand of high-yield mining areas. At the same time, maintenance of a single first conveyor belt 11 does not require a complete system shutdown, shortening the maintenance window.

[0091] Furthermore, the dual first conveyor belts 11 can separate the transport of large pieces of ore from the crushed material. For example, the left first conveyor belt 11 transports ore ≤300mm, and the right first conveyor belt 11 transports powdered ore, reducing crushing losses and spillage during mixed transport.

[0092] Optionally, there can be multiple first connecting supports 12, second connecting supports 13, and third connecting supports 14. In this way, the load is distributed to the stepped foundation through multiple supports, avoiding local overload and extending the service life of the main transport beam 10 and the connecting supports.

[0093] Figure 11 This is a front view of a material dispensing mechanism provided in an embodiment of this disclosure. Figure 12 This is a side view of a material dispensing mechanism provided in an embodiment of this disclosure. Figure 11 , 12 As shown, the open-pit mine conveying system also includes a material distribution mechanism 30, which includes a material distribution conveyor belt 31, a traveling frame 32, fixed piles 33 and movable piles 34. The fixed piles 33 and movable piles 34 are both located on the same side of the traveling frame 32.

[0094] like Figure 1 , 11 As shown in Figures 1 and 12, the second end of the main conveyor beam 10 is located at the top of the traveling frame 32, and the material distribution conveyor belt 31 is located below the traveling frame 32. The first conveyor belt 11 is connected to the material distribution conveyor belt 31 through a transition structure. The movable pile 34 is used to drive the traveling frame 32 to move.

[0095] Among them, the material distribution conveyor belt 31 is located below the walking frame 32. After receiving the material from the main conveyor beam 10 via the first conveyor belt 11, it can directly distribute the minerals to different areas such as the storage yard, replacing the traditional secondary transportation of mineral trucks, reducing the transfer links, and at the same time, the conveyor belt can also reduce dust pollution.

[0096] Meanwhile, the top of the traveling frame 32 supports the second end of the main conveying beam 10, and the movable pile 34 can drive the traveling frame 32 to move horizontally, causing the second end of the main conveying beam 10 to move synchronously. When the mine roof bench is advanced, there is no need to disassemble the main conveying beam 10. The coverage area of ​​the large-span beam can be adjusted simply by moving the traveling frame 32, ensuring that the material always falls accurately to the target area.

[0097] Optionally, such as Figure 12 As shown, the movable pile 34 includes: a guide tube 341, a traveling leg 342, a lifting cylinder 343, a sliding cylinder 344, and a sliding plate 345.

[0098] like Figure 12 As shown, one end of the guide tube 341 is connected to the traveling frame 32, the top end of the traveling leg 342 is movably inserted into the guide tube 341, the lifting cylinder 343 is located inside the guide tube 341, the two ends of the lifting cylinder 343 are respectively connected to the top end of the traveling frame 32 and the top end of the traveling leg 342, the slide plate 345 is located at the bottom end of the traveling leg 342, the sliding cylinder 344 is located between the slide plate 345 and the traveling leg 342, and the extension and retraction direction of the sliding cylinder 344 is parallel to the surface of the slide plate 345, the two ends of the sliding cylinder 344 are respectively connected to the bottom end of the traveling leg 342 and the slide plate 345.

[0099] In the above implementation, the guide tube 341 provides rigid guidance for the traveling outrigger 342, ensuring that it rises and falls along the axial direction without deviation; the lifting cylinder 343 can precisely adjust the height of the traveling outrigger 342 to adapt to the changes in the height of the mine roof steps, avoid sudden tension changes in the conveying main beam 10 due to the undulation of the steps, and ensure the continuity of transportation.

[0100] The working process of the movable pile 34 is as follows: The fixed pile 33 and the movable pile 34 stand together on the top step and support the load transmitted from the traveling frame 32. When relocation is required, the traveling leg 342 lifts the traveling frame 32 through the lifting cylinder 343, so that the fixed pile 33 is removed from the ground of the top step; then, the sliding cylinder 344 extends, so that the sliding plate 345 and the traveling leg 342 slide relative to each other. At this time, the traveling leg 342 drives the traveling frame 32 to slide; when the traveling frame 32 slides one step, the lifting cylinder 343 retracts, the fixed pile 33 contacts the ground of the top step and provides support, the movable pile 34 is removed from the ground, and then the sliding cylinder 344 retracts, and the lower sliding plate 345 retracts to the initial position; if the traveling frame 32 is to continue moving, the traveling leg 342 is controlled to lift the traveling frame 32 again, and the next traveling action cycle can be entered.

[0101] Figure 13 This is a front view of a crushing mechanism provided in an embodiment of this disclosure. Figure 1 , 13 As shown, the open-pit mine conveying system also includes a crushing mechanism 40, which includes a feed hopper 41, a feed conveyor belt 42, and a crusher 43. The feed conveyor belt 42 is connected between the feed hopper 41 and the crusher 43 through a transition structure, and the discharge port of the crusher 43 is connected to the conveying equipment 23 through the transition structure.

[0102] The feed hopper 41 stores the material spilled from the ore truck, preventing the crusher 43 from being overloaded due to direct unloading from the ore truck and ensuring stable equipment operation. The feed conveyor belt 42 continuously transports the material, breaking the intermittent unloading limitation of the ore truck and allowing the crusher 43 to continuously process the material, increasing the crushing capacity per unit time. After crushing, the material is directly transferred to the second conveyor belt 231 of the conveying equipment 23 via a chute, eliminating the need for secondary handling of large pieces of material from the ore truck, reducing transfer losses and costs, and the enclosed chute design reduces dust emission.

[0103] Optionally, the inclination angle of the main conveyor beam 10 is greater than or equal to 20°.

[0104] In this disclosure, the design of the conveying main beam 10 with an inclination angle of ≥20° enables continuous lifting and transportation of bulk materials in open-pit mines with steep slopes. The steep-angle conveying main beam 10 can adapt to complex terrain at the end of the slope, eliminating the need for additional site leveling or transfer links. It can be directly arranged along steep slopes, significantly shortening the transportation distance. It ensures continuous transportation efficiency, overcomes the problem of material slippage at steep slopes, and avoids the high losses of heavy-load mining trucks climbing slopes and the inefficiency of intermittent transportation. It enhances economic efficiency and environmental friendliness, reducing energy consumption, tire wear, and exhaust emissions compared to continuous conveying and climbing by mining trucks, aligning with the intensive and low-carbon development direction of open-pit mines.

[0105] The workflow of an open-pit mine conveying system provided in this embodiment is as follows: First, the fully loaded mining truck travels to the bottom bench of the mine, dumps the material into the feed hopper of the crushing mechanism, and the crushed material is then transferred to the large-span beam by the conveying equipment of the hoisting tower. This allows the material to be continuously lifted along the steeply inclined conveying main beam to the top bench of the mine, and then transferred to the next process by the material distribution conveyor belt of the top bench, realizing the continuous lifting and transportation of bulk materials in the environment of steeply inclined end walls.

[0106] When it is necessary to move the large-span beam as the mining face advances, the overall displacement of the large-span beam is achieved through the coordinated movement of the traveling mechanism and the fixed and traveling legs of the material distribution machine.

[0107] During operation, if the step shifts laterally, the third connecting support absorbs the displacement difference through the sliding plate, maintaining the straightness of the main beam's central axis. If the step height difference changes, the ball joints of the first and second connecting supports rotate around the ball seat, and the main beam rotates synchronously around the ball seat of the third connecting support. At the same time, the two ends slide axially along the central axis to compensate for the accumulated height, ensuring that the main beam does not detach from each connecting support and remains stable.

[0108] The above is not intended to limit this disclosure in any way. Although this disclosure has been disclosed above through embodiments, it is not intended to limit this disclosure. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this disclosure. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this disclosure without departing from the content of the technical solution of this disclosure shall still fall within the scope of the technical solution of this disclosure.

Claims

1. An open pit conveying system, characterized in that, The open-pit conveying system comprises a large-span beam and a lifting tower, the large-span beam comprises a conveying main beam (10) and a first conveying belt (11), the first conveying belt (11) extends from a first end to a second end of the conveying main beam (10); The lifting tower comprises a support platform (21), a lifting platform (22) and a conveying device (23), the support platform (21) and the lifting platform (22) are arranged at intervals, the first end of the conveying main beam (10) is located on the support platform (21), the beam body between the first end and the second end of the conveying main beam (10) is located on the lifting platform (22), and the conveying device (23) is located on the support platform (21) and used for conveying minerals to the first end of the conveying main beam (10).

2. The surface mine conveyor system of claim 1, wherein, The lifting platform (22) comprises a platform body (221), a pile leg (222) and a lifting mechanism (223), the platform body (221) is provided with a pile hole (220) through which the pile leg (222) passes, the pile leg (222) is movably inserted into the pile hole (220), and the lifting mechanism (223) is located on the platform body (221) and used for driving the platform body (221) to move along the axial direction of the pile leg (222).

3. The surface mine conveyor system of claim 2, wherein, The lifting platform (22) further comprises a walking mechanism, the walking mechanism comprises a walking pile (224), a supporting leg (225) and a jacking oil cylinder (226), the top end of the supporting leg (225) is connected to the bottom end of the pile leg (222), the bottom end of the supporting leg (225) has a cavity extending to the top end, and the top end of the walking pile (224) is movably inserted into the cavity; The jacking oil cylinder (226) is located in the cavity, one end of the jacking oil cylinder (226) is connected to the inner wall of the supporting leg (225), and the other end of the jacking oil cylinder (226) is connected to the walking pile (224); The conveying device (23) comprises a second conveying belt (231) and a third conveying belt (232), the first end of the second conveying belt (231) is located on the bottom of the support platform (21), the second end of the second conveying belt (231) is located on the supporting leg (225), the first end of the third conveying belt (232) is located on the supporting leg (225) and connected to the second end of the second conveying belt (231) through a transition structure, the second end of the third conveying belt (232) is located on the top of the support platform (21), and the second end of the third conveying belt (232) is connected to the first end of the conveying main beam (10) through a transition structure.

4. The surface mine conveyor system of claim 3, wherein, The bottom end of the walking pile (224) is provided with a moving device (227).

5. The surface mine conveyor system of claim 1, wherein, The large-span beam further comprises a first connecting support (12), a second connecting support (13) and a third connecting support (14). The first connecting support (12) and the second connecting support (13) are respectively located at the first end and the second end of the conveying main beam (10), the first connecting support (12) is also located on the support platform (21), the third connecting support (14) is located on the conveying main beam (10) and between the first connecting support (12) and the second connecting support (13), and the third connecting support (14) is also located on the lifting platform (22); The third connecting support (14) comprises a first base (141) and a first sliding plate (142), the first sliding plate (142) is located on the top surface of the first base (141), and the first sliding plate (142) is in sliding connection with the top surface of the first base (141) in a direction perpendicular to the central axis of the conveying main beam (10), and the first sliding plate (142) is connected with the conveying main beam (10).

6. The surface mine conveyor system of claim 5, wherein, The first connecting support (12) and the second connecting support (13) each comprise a second base (121) and a second sliding plate (122), the second sliding plate (122) is located on the top surface of the second base (121), and the second sliding plate (122) is in sliding connection with the top surface of the second base (121) in the axial direction of the central axis of the conveying main beam (10), and the second sliding plate (122) is connected with the end of the conveying main beam (10).

7. A surface mine conveyor system according to any one of claims 1 to 6, characterised in that, The open-pit mine conveying system further comprises a distributing mechanism (30), the distributing mechanism (30) comprises a distributing conveyor belt (31), a walking frame (32), a fixed stake (33) and a moving stake (34), and the fixed stake (33) and the moving stake (34) are located on the same side of the walking frame (32); The second end of the conveying main beam (10) is located at the top of the walking frame (32), the distributing conveyor belt (31) is located below the walking frame (32), and the first conveyor belt (11) is connected with the distributing conveyor belt (31) through a transition structure; The moving stake (34) is used for driving the walking frame (32) to move.

8. The surface mine conveyor system of claim 7, wherein, The moving stake (34) comprises a guide pipe (341), a walking support leg (342), a lifting oil cylinder (343), a sliding oil cylinder (344) and a sliding plate (345). One end of the guide pipe (341) is connected with the walking frame (32), the top end of the walking support leg (342) is movably inserted into the guide pipe (341), the lifting oil cylinder (343) is located in the guide pipe (341), two ends of the lifting oil cylinder (343) are respectively connected with the walking frame (32) and the top end of the walking support leg (342), the sliding plate (345) is located at the bottom end of the walking support leg (342), the sliding oil cylinder (344) is located between the sliding plate (345) and the walking support leg (342), the extension direction of the sliding oil cylinder (344) is parallel to the plate surface of the sliding plate (345), and two ends of the sliding oil cylinder (344) are respectively connected with the bottom end of the walking support leg (342) and the sliding plate (345).

9. A surface mine conveyor system according to any one of claims 1 to 6, characterised in that, The open-pit mine conveying system further comprises a crushing mechanism (40), the crushing mechanism (40) comprises a feeding hopper (41), a feeding conveyor belt (42) and a crusher (43), the feeding conveyor belt (42) is connected between the feeding hopper (41) and the crusher (43) through a transition structure, and the discharge port of the crusher (43) is connected with the conveying device (23) through a transition structure.

10. A surface mine conveyor system according to any one of claims 1 to 6, characterised in that, The inclination angle of the conveying main beam (10) is greater than or equal to 20°.

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