Mobile in-pit primary processing process for run-of-quarry rock at stepped bench quarry working face

Abstract

Disclosed is a mobile in-pit primary processing process for run-of-quarry rock at a stepped bench quarry working face, comprising: arranging a tracked impact roller crusher in-pit at a quarry working face, the tracked impact type roller crusher receiving, conveying, and crushing, in-pit, run-of-quarry rock at the quarry working face; a plurality of tracked mobile belt conveyors, wherein each tracked mobile belt conveyor comprises a mobile crawler-driven chassis and a belt conveyor body provided thereon, and the plurality of tracked mobile belt conveyors are connected end-to-end to convey materials; the quarry working face comprises a topmost quarry working face provided at a hill summit and a stepped bench quarry working face provided below the hill summit; and the tracked mobile belt conveyors leverage a vertical drop to enable conveyed materials to roll down from the quarry working face along a hillside slope or to be transported downward directly by means of a long-distance belt conveyor. The present invention integrates primary crushing operations and quarrying operations, thereby reducing intermediate handling stages, lowering energy consumption, reducing costs, and offering high flexibility and high efficiency.

Description

A process for in-situ mobile head section processing of ore in stepped quarry faces Technical Field

[0001] This invention relates to the field of stone processing technology, and in particular to an in-situ mobile head section processing technology for ore in stepped mining faces. Background Technology

[0002] In the field of manufactured sand mining and preparation, open-pit mining of ore has always been one of the important mining methods. Currently, the industry has a series of standards and specifications for open-pit ore mining and subsequent processing. For example, regarding the recovery rate, according to relevant industry standards, different ore types and mining conditions have clear recovery rate requirements to ensure the full utilization of ore resources. Furthermore, there are also certain regulations regarding energy consumption. For instance, some regions have stipulated upper limits for the comprehensive energy consumption per unit of ore in open-pit mining, and there are corresponding reference values ​​for the comprehensive energy consumption per unit of ore in each process such as drilling, loading, transportation, and crushing.

[0003] However, in existing open-pit mining processes for manufactured sand, the mining area and the initial crushing area are typically separated. This traditional mining model falls short of the industry standards and specifications that emphasize high efficiency, energy conservation, and full resource utilization. In the traditional model, the mined ore first undergoes loading operations, using loaders and other equipment to transfer it from the mining site to transport vehicles. These vehicles then transport the ore to the initial crushing area for further processing. This series of operations not only fails to meet increasingly stringent industry standards in terms of fuel and energy consumption but also increases production costs for enterprises. Furthermore, during transportation, ore may scatter and be damaged, affecting the ore recovery rate and overall utilization rate, contradicting the industry standards' requirement for full resource utilization. In addition, this separate setup leads to low work efficiency, impacting the progress of the entire production process and hindering the industry's pursuit of high-efficiency production.

[0004] In conclusion, a new technological solution is urgently needed to address these issues in the existing open-pit mining and preparation of manufactured sand ore, in order to better align with industry development trends and standards. Summary of the Invention

[0005] In view of the above background technology, the present invention provides a new process in which the first-stage crushing working area is set on the ore quarrying working face, so as to combine the first-stage crushing work with the quarrying work, reduce intermediate transportation links, save energy consumption, save production costs, and has high flexibility, good adaptability and high production efficiency.

[0006] To achieve the above objectives, the present invention provides an in-situ mobile head section processing technology for ore in a stepped mining quarry face, comprising: setting up a tracked impact roller crusher in-situ at the mining quarry face, wherein the tracked impact roller crusher includes a tracked drive unit, a heavy-duty chain scraper conveyor connected to the tracked drive unit, and an impact roller crushing device set above the heavy-duty chain scraper conveyor;

[0007] The tracked impact roller crusher receives, transports, and crushes in-situ ore mined on the quarry face of the mine.

[0008] Multiple tracked mobile conveyor belts, each tracked mobile conveyor belt including a mobile tracked drive base and a conveyor belt body mounted thereon, with the multiple tracked mobile conveyor belts connected end to end to transport materials;

[0009] The quarry working face includes a top quarry working face located at the top of the mountain and a stepped quarry working face located at the bottom of the mountain.

[0010] The rearmost part of the tracked mobile conveyor conveys material to the edge of the quarry face. Utilizing the elevation difference of the mountain, the conveyed material rolls down the mountainside from the quarry face to the transfer warehouse at the foot of the mountain, or is directly transported down the mountain to the transfer warehouse using a long-distance conveyor belt.

[0011] Preferably, the heavy-duty chain scraper conveyor includes an integrally formed feeding section, a concave section, and a discharging section. The feeding section is located in front of the impact roller crusher, the discharging section is located behind the impact roller crusher, and the concave section is located below the impact roller crusher. A support frame is provided on the support trough of the concave section. Multiple parallel power conveying rollers are arranged sequentially on the support frame from the feeding direction to the discharging direction. The outer circumference of the power conveying rollers is provided with a spiral guide rail that guides the material in the feeding direction. The upper surface of the power conveying rollers is not higher than the upper conveying plane of the heavy-duty chain scraper conveyor. A crushing load-bearing base plate is connected to the discharging section of the power conveying rollers. The crushing load-bearing base plate is located below the impact roller crusher. The crushing load-bearing base plate is connected to the support trough through the support frame and is elastically connected to the support trough along the feeding direction. The discharging section is located behind the crushing load-bearing base plate.

[0012] The impact roller crushing device includes a housing and rollers. The rollers are mounted on the support groove via bearing seats, placing the rollers in the crushing chamber above the crushing load-bearing base plate. The impact roller crushing device includes a drive motor, which drives the V-belt pulley at the end of the rollers to rotate via a V-belt, thereby driving the rollers to rotate at high speed. The crushing load-bearing base plate and the inner cavity of the housing together form the crushing chamber.

[0013] The feed inlet of the impact roller crusher is located above the crushing load-bearing base plate. The distance between the outer edge of the first hammer of the roller that feeds first and the vertical projection of the roller onto the crushing load-bearing base plate and the outer edge of the first feeding side of the crushing load-bearing base plate is no greater than half of the vertical projection distance between the first hammer and the crushing load-bearing base plate.

[0014] Preferably, the heavy-duty chain scraper conveyor includes support troughs disposed on both sides, the support troughs being connected to the carrier frame of the tracked drive unit, a drive sprocket being disposed at one end of each of the two sides of the troughs, and multiple redirecting sprockets being disposed at the other end and at the corner of the concave section, respectively, high-strength wear-resistant chain links being fitted on the drive sprockets and the redirecting sprockets, and scrapers being disposed at even intervals on the high-strength wear-resistant chain links, the main shaft of the drive sprocket being connected to a motor drive assembly.

[0015] Preferably, the crushing load-bearing base plate is set at a slight inclination with the feed end lower and the discharge end higher, and the acute angle between it and the horizontal plane is no more than 5 degrees. The upper edge of the feed end of the crushing load-bearing base plate is higher than the upper edge of the power conveying roller, and the height difference is no more than one-tenth of the feed inlet size of the impact roller crusher device.

[0016] Preferably, a reinforcing rib plate is provided horizontally below the crushing load-bearing base plate. The reinforcing rib plate includes a first plane that extends horizontally and is perpendicular to the material feeding and discharging direction. The first plane is connected to an elastic component with an elastic force perpendicular to it. The elastic component is connected to a bearing plate. Both ends of the bearing plate extend from both sides of the concave section and are connected to fixed piles. The fixed piles are used to be inserted into the underground of the quarry working face for pile fixing.

[0017] Preferably, at least one reinforcing rib is provided, and the reinforcing rib is provided on the surface of the plumb bob where the foremost hammer head of the roller is located.

[0018] Preferably, the elastic component is a leaf spring.

[0019] Preferably, multiple sets of fixing studs are provided on the upper two sides of the support frame, and connecting waist-shaped holes are provided on the corresponding sides of the crushing load-bearing base plate. The waist-shaped holes are fitted onto the fixing studs, and a longitudinal limiting nut is provided on the upper part of the fixing studs.

[0020] Preferably, the discharge section is connected to the roller device and the discharge conveyor belt.

[0021] Preferably, the subsequent process of the tracked impact roller crusher is a Raine crusher, the discharge particle size of the Raine crusher is 0-120mm, and the primary crusher discharge particle size of the tracked impact roller crusher is 0-350mm.

[0022] Compared with related technologies, the in-situ moving head section processing technology for stepped mining faces provided by this invention has the following beneficial effects:

[0023] 1. The process head crusher of this invention adopts a tracked impact roller crusher with low-profile feeding, eliminating the need for an unloading platform and incurring almost no infrastructure costs. This significantly reduces the height compared to the traditional silo and feeder feeding method.

[0024] 2. The tracked mobile conveyor belt units in this process can be arbitrarily added, reduced, or combined and arranged according to the distance between the initial and final mining positions, which is highly flexible and adaptable.

[0025] 3. This process involves installing a tracked impact roller crusher in situ at the quarry face to directly crush the ore in place, eliminating the need for shoveling and long-distance transportation, thus greatly reducing reliance on fuel and lowering fuel consumption costs.

[0026] 4. All equipment in this process adopts electric direct drive, such as electric shovel feeding, electric driven track walking, electric driven crusher crushing, etc., using electricity to replace oil working mode, avoiding the problem of increased mining costs due to fuel shortage; and there is no need to store fuel on site, reducing safety hazards. Multiple equipment working together improves energy utilization efficiency and reduces the overall energy consumption cost of the mining process.

[0027] 5. The crushing device in this process is directly installed at the quarry face, allowing the mined ore to be crushed immediately and then quickly transported via a crawler-mounted conveyor belt, significantly shortening the process flow and improving production efficiency. Furthermore, the stepped mining method allows for easy movement from one face to the next for further crushing, ensuring high production continuity and efficiency.

[0028] 6. This process utilizes a tracked impact roller crusher and a tracked mobile conveyor belt, enabling continuous operation without being limited by loading and transport vehicle scheduling. Multiple pieces of equipment work together to continuously process ore, reducing production downtime and further improving work efficiency.

[0029] 7. This process involves crushing and transporting the ore in situ, reducing spillage and loss during transportation, and improving the ore recovery rate and comprehensive utilization rate, which meets the industry standard requirements for full utilization of resources.

[0030] 8. This technology can effectively operate on different quarrying faces, including top quarrying faces and in-mountain quarrying faces. It utilizes the elevation difference of the mountain for material transportation, making full use of natural conditions and making transportation smoother.

[0031] 9. This process is pollution-free. Once the mine is completed, it will be a flat area with no concrete structures (construction waste) related to the equipment. Attached Figure Description

[0032] Figure 1 is a schematic diagram of the process of the present invention;

[0033] Figure 2 is a schematic diagram of the process of the present invention;

[0034] Figure 3 is a schematic diagram of the process of the present invention;

[0035] Figure 4 is a front view of the present invention;

[0036] Figure 5 is a top view of the present invention;

[0037] Figure 6 is a side view of the present invention;

[0038] Figure 7 is a schematic diagram of the upper power conveying roller and the crushing load-bearing bottom plate of the concave section;

[0039] Figure 8 is a top view of the upper power conveying roller and the crushing load-bearing bottom plate of the concave section.

[0040] Figure 9 is a cross-sectional view of the upper power conveying roller and the crushing load-bearing bottom plate of the concave section;

[0041] Figure 10 is a schematic diagram of the impact roller crusher.

[0042] Figure 11 is a schematic diagram of the roller and breaker structure;

[0043] Figure 12 is a schematic diagram of the working state of the present invention.

[0044] Numbering on the map:

[0045] a. Tracked impact roller crusher; b. Quarry face; c. Tracked mobile conveyor belt; c-1. Tracked drive base; c-2. Conveyor belt body; d. Long-distance conveyor belt; e. Raine crusher; 1. Tracked drive unit; 2. Impact roller crushing device; 3. Heavy-duty chain scraper conveyor; 301. Feed section; 302. Concave section; 303. Discharge section; 4. Support frame; 5. Power conveyor roller; 6. Spiral guide rail; 7. Crushing load-bearing base plate; 8. Machine casing; 9. 10. Roller, 11. Crushing chamber, 12. Drive motor, 13. Hammer, 14. Feed inlet, 15. Foremost hammer, 16. Support trough, 17. Baffle plate, 18. High-strength wear-resistant chain link, 19. Scraper, 20. Drive sprocket, 21. Idling sprocket, 22. Upper edge of power conveying roller, 23. Reinforcing rib plate, 24. First plane, 25. Elastic component, 26. Bearing plate, 27. Fixing pile, 28. Discharge hammer, 39. Longitudinal limiting nut, 30. Upper edge line of feed end. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0047] As shown in Figures 1 to 12, an in-situ mobile head section processing technology for ore in a stepped mining quarry face includes: setting up a tracked impact roller crusher a in-situ at the mining quarry face; the tracked impact roller crusher a includes a tracked drive unit 1, a heavy-duty chain scraper conveyor 3 connected to the tracked drive unit 1, and an impact roller crushing device 2 set above the heavy-duty chain scraper conveyor 3.

[0048] The tracked impact roller crusher a receives, transports, and crushes in-situ ore mined on the quarry face b of the mine.

[0049] Multiple tracked mobile conveyor belts c, each tracked mobile conveyor belt c includes a mobile tracked drive base c-1 and a conveyor belt body c-2 mounted on it. Multiple tracked mobile conveyor belts c are connected end to end to transport materials.

[0050] The quarry working face b includes a top quarry working face located at the top of the mountain and a stepped quarry working face located at the bottom of the mountain.

[0051] The rearmost part of the tracked mobile conveyor belt c transports material to the edge of the quarry face b. Utilizing the elevation difference of the mountain, the transported material is rolled down from the quarry face b to the transfer warehouse at the foot of the mountain via chutes or shafts, or directly transported down the mountain to the transfer warehouse via a long-distance conveyor belt d. A conveyor belt is installed under the transfer warehouse to transport the ore to the fine crushing workshop for crushing.

[0052] Compared with related technologies, the in-situ ore moving head section processing technology for stepped mining faces provided in this embodiment has the following beneficial effects:

[0053] 1. The process head crusher of this invention adopts a tracked impact roller crusher with low-profile feeding, eliminating the need for an unloading platform and incurring almost no infrastructure costs. This significantly reduces the height compared to the traditional silo and feeder feeding method.

[0054] 2. The tracked mobile conveyor belt units in this process can be arbitrarily added, reduced, or combined and arranged according to the distance between the initial and final mining positions, which is highly flexible and adaptable.

[0055] 3. This process involves installing a tracked impact roller crusher in situ at the quarry face to directly crush the ore in place, eliminating the need for shoveling and long-distance transportation, thus greatly reducing reliance on fuel and lowering fuel consumption costs.

[0056] 4. All equipment in this process adopts electric direct drive, such as electric shovel feeding, electric driven track walking, electric driven crusher crushing, etc., using electricity to replace oil working mode, avoiding the problem of increased mining costs due to fuel shortage; and there is no need to store fuel on site, reducing safety hazards. Multiple equipment working together improves energy utilization efficiency and reduces the overall energy consumption cost of the mining process.

[0057] 5. The crushing device in this process is directly installed at the quarry face, allowing the mined ore to be crushed immediately and then quickly transported via a crawler-mounted conveyor belt, significantly shortening the process flow and improving production efficiency. Furthermore, the stepped mining method allows for easy movement from one face to the next for further crushing, ensuring high production continuity and efficiency.

[0058] 6. This process utilizes a tracked impact roller crusher and a tracked mobile conveyor belt, enabling continuous operation without being limited by loading and transport vehicle scheduling. Multiple pieces of equipment work together to continuously process ore, reducing production downtime and further improving work efficiency.

[0059] 7. This process involves crushing and transporting the ore in situ, reducing spillage and loss during transportation, and improving the ore recovery rate and comprehensive utilization rate, which meets the industry standard requirements for full utilization of resources.

[0060] 8. This technology can effectively operate on different quarrying faces, including top quarrying faces and in-mountain quarrying faces. It utilizes the elevation difference of the mountain for material transportation, making full use of natural conditions and making transportation smoother.

[0061] 9. This process is pollution-free. Once the mine is completed, it will be a flat area with no concrete structures (construction waste) related to the equipment.

[0062] In other specific embodiments, the heavy-duty chain scraper conveyor 3 specifically includes an integrally formed feed section 301, concave section 302, and discharge section 303. The feed section 301 is located in front of the impact roller crusher 2 to receive raw materials; the discharge section 303 is located behind the impact roller crusher 2 to discharge the crushed material; and the concave section 302 is located below the impact roller crusher 2 to support and transport materials. This design allows the conveyor to withstand direct feeding of in-situ coarse ore after blasting, effectively transporting the material to the impact roller crusher 2, and enabling integrated output of the crushed material.

[0063] A support frame 4 is installed on the support trough of the concave section 302. Multiple parallel power conveying rollers 5 are arranged sequentially on the support frame from the inlet to the outlet direction. The power conveying rollers mainly consist of an outer roller, shaft, bearings, drive unit, and support structure. The outer roller is cylindrical, and the drive unit, consisting of a motor, reducer, and coupling, provides rotational power to the outer roller. A spiral guide rail 6 is provided around the circumference of the outer roller 5, guiding the material in the inlet direction. This allows for a gradient feeding pattern during material conveying, with larger stones fed from one side and smaller stones from the other. This design not only improves crushing efficiency but also reduces material blockage.

[0064] The upper surface of the power conveyor roller 5 is not higher than the upper conveying plane of the heavy-duty chain scraper conveyor to ensure smooth material conveying. A crushing load-bearing base plate 7 is connected to the rear of the power conveyor roller 5. The crushing load-bearing base plate 7 is positioned below the impact roller crusher 2 to withstand the impact force during the crushing process. The crushing load-bearing base plate 7 is connected to the support trough via a support frame 4 and is elastically connected to the support trough along the feed direction to reduce reverse resistance and impact damage to the heavy-duty chain scraper conveyor. A discharge section 303 is located behind the crushing load-bearing base plate 7.

[0065] The impact roller crusher 2 includes a housing 8 and a roller 9, as well as a crushing chamber 10, a feed inlet, a discharge cover, and other components. The roller 9 is mounted on a support trough via a bearing seat. The crushing load-bearing base plate 7 and the inner cavity of the housing 8 are combined to form the crushing chamber 10, which is used to contain and crush materials. The roller 9 is placed in the crushing chamber 10 above the crushing load-bearing base plate 7. The impact roller crusher 2 includes a drive motor 11. The drive motor 11 drives the V-belt pulley at the end of the roller 9 to rotate via a V-belt, thereby driving the roller 9 to rotate at high speed. Then, the hammer 12 efficiently chisels and crushes the material.

[0066] The feed inlet 13 of the impact roller crusher 2 is located above the crushing support plate 7. The distance between the outer edge of the first hammer 12-1 of the roller 9, which is the first to feed, and the vertical projection of the outer edge of the first feeding edge of the crushing support plate 7 is no more than half the vertical projection distance of the first hammer 12-1 from the crushing support plate 7. This design ensures that the material can smoothly enter the crushing chamber 10 for crushing. Occasionally, if a large stone blocks one side of the feed inlet due to its size, it can clear the blockage on its own, reducing the frequency of downtime for material removal.

[0067] In addition, the heavy-duty chain scraper conveyor 3 equipped with the tracked crushing device includes multiple components such as a trough, baffles 15, high-strength wear-resistant chain links 16, and scrapers 17. A motor is connected to a reducer via a high-speed shaft coupling, driving the drive sprocket 18 to rotate. The trough includes support troughs 14 located on both sides, which are connected to the carrier frame of the tracked drive unit 1. A drive sprocket 18 is installed at one end of each side of the trough, and multiple redirecting sprockets 19 are installed at the other end and at the corner of the concave section. High-strength wear-resistant chain links 16 are fitted onto the drive sprockets 18 and redirecting sprockets 19, and scrapers 17 are evenly spaced on the high-strength wear-resistant chain links 16. The main shaft of the drive sprocket 18 is connected to a motor drive assembly, providing power for the conveyor's operation, thereby driving the scrapers 17 to move on the high-strength wear-resistant chain links 16, achieving smooth material transport.

[0068] The heavy-duty chain scraper conveyor 3 can directly feed in-situ coarse ore after blasting and transport it to the front of the feed inlet. The scraper 17 and pusher stones continuously convey the material to the drive conveyor roller. Under the rolling and spiral guidance of the drive conveyor roller, heavier, larger pieces of material remain at one end of the drive conveyor roller and are pushed towards the feed inlet. Relatively smaller pieces of material are driven towards the feed inlet and move towards the tail end of the conveyor spiral, thus forming a gradient feeding pattern where large stones are fed from one side and small stones from the other. Even when large stones block one side of the feed inlet, small and medium-sized stones on the other side can still be continuously fed in and crushed, improving crushing efficiency.

[0069] The crushing load-bearing base plate 7 is set to prevent the crushing impact force from acting on the upper transmission surface of the conveying device, thereby reducing the reverse resistance and impact damage to the conveying device and reducing the burning and damage of the drive roller or drive sprocket 18 of the conveying device.

[0070] Large material blockages typically occur when the longitudinal dimension of the material exceeds the height of the foremost feeding hammer on the crushing roller 9, making it difficult for the hammer to pick up the material. The crushing device of this invention features a suitable-sized crushing support plate 7 with an extended front plate. If the lateral dimension of the material along the feeding direction is small, most of it is pushed onto the crushing support plate. However, if its longitudinal dimension is large, making it difficult for the foremost hammer 12-1 to pick up, and the material is a long, strip-shaped piece, the continuous feeding of the subsequent drive conveyor roller pushes the lower end of this long, strip-shaped material, causing it to flip and enter through a narrow end, thus resolving the blockage problem. If its lateral dimension is also large, a significant portion will be placed on the drive roller, where the tumbling force of the drive roller helps to tumble the material. Once a piece meets the feeding dimension, it is picked up by the hammer 12, also resolving the blockage problem to some extent.

[0071] The tracked drive unit 1 serves as the load-bearing base, making the equipment easy to move and adjust its work position, allowing for flexible operation in various scenarios and improving adaptability to different work sites. It is also more suitable for in-situ flexible operation at quarry faces in mines. Combined with the heavy-duty chain scraper conveyor 3, it achieves integrated in-situ feeding, crushing, and discharging at quarry faces, simplifying the types of power equipment and reducing the complexity of connecting, debugging, and infrastructure construction. For motor drives, both the conveying and crushing devices use 10kV high-voltage permanent magnet motors, resulting in significant energy savings. The application of a PLC frequency conversion control system enables precise adjustment of the feeding speed and roller height 9 of the heavy-duty chain scraper conveyor 3, further improving equipment performance and efficiency, reducing energy-intensive transportation of raw ore, contributing to energy conservation and emission reduction, and making it more environmentally friendly and efficient.

[0072] In other specific embodiments, the crushing support plate 7 is set at a slight inclination, with the feed end lower and the discharge end higher, and the acute angle between it and the horizontal plane is no greater than 5 degrees. This design helps to expand the feed opening and lengthen the effective crushing path, thereby increasing the crushing ratio. At the same time, the upper edge 31 of the feed end of the crushing support plate 7 is higher than the upper edge 20 of the power conveying roller, and the height difference is no more than one-tenth of the feed opening size of the impact roller crusher device 2. This design allows the material to roll onto the slightly higher crushing support plate 7 at a slightly lower position during the conveying process, pushing the material at a small angle like a stone pusher. This helps to push the material from the bottom to the front of the feed in sequence, reducing material deposition, increasing pushing activity, reducing material padding at the feed opening, and reducing material blockage. On the other hand, a padding layer is generated in the crushing chamber 10 to protect the crushing support plate 7. Stone-on-stone and stone-on-stone grinding within the crushing chamber 10 reduces equipment wear and increases the crushing ratio.

[0073] In other specific embodiments, a reinforcing rib plate 21 is laterally arranged below the crushing load-bearing base plate 7. The reinforcing rib plate 21 includes a first plane 22 extending laterally and perpendicular to the material feeding and discharging direction. The first plane 22 is connected to an elastic component 23 with an elastic force perpendicular to it. The elastic component is connected to a bearing plate 24. Both ends of the bearing plate 24 extend from the sides of the concave section and are connected to fixed piles 25. The fixed piles 25 are used to be inserted into the underground of the quarry working face for pile fixing. The fixed piles 25 can penetrate deep into the underground of the quarry working face to provide stable support for the equipment. This embodiment helps to increase the strength of the crushing load-bearing base plate 7, and maximizes the lateral impact force of the crushing hammer 12 to be directed to the fixed piles 25 and then to the working ground for absorption through the elastic component 23. This reduces the lateral impact on the support trough of the heavy-duty chain scraper conveyor 3 and also reduces the lateral impact on the base of the crawler drive unit. For the same processing capacity, the crushing equipment can be lightweight in terms of bearing and support equipment, reducing costs, optimizing equipment performance, and extending service life.

[0074] In other specific embodiments, the number of reinforcing ribs 21 can also be adjusted. In crushing equipment with a small processing capacity, one reinforcing rib 21 is sufficient; while in crushing equipment with a larger processing capacity, multiple reinforcing ribs 21 are used to optimize the impact resistance and stability of the equipment.

[0075] As shown in Figure 5, at least one reinforcing rib 21 is provided, which is located on the vertical hammer surface where the foremost hammer 12-1 of the roller 9 is located. The force exerted by the foremost hammer 12-1 of the roller 9 on the stone is mostly a vertically downward chiseling force, which has the greatest impact on the crushing load-bearing base plate 7. Therefore, the reinforcing rib 21 is provided here to optimize the impact resistance of the equipment. In the subsequent downward action of the hammer 12, the chiseling force and the more persistent squeezing and abrasive forces work together, and the force in the vertically downward direction gradually weakens while the force towards the rear of the discharge gradually strengthens. Therefore, in conjunction with the elastic component 23 in the feeding and discharging direction, the persistent lateral force is elastically and persistently softened, making it easier for the force on the material to spread, persist, and be homogenized, which is beneficial for the uniform crushing and smaller particle size crushing of the material.

[0076] In other specific embodiments, at least three reinforcing ribs 21 are provided, namely a first reinforcing rib, a second reinforcing rib, and a third reinforcing rib. The first reinforcing rib is provided on the vertical surface of the foremost hammer 12-1 of the roller 9, the third reinforcing rib is provided on the vertical surface of the narrowest discharge hammer 29, and the second reinforcing rib is provided at the centerline position between the first and second reinforcing ribs. The reinforcing ribs 21 and the corresponding elastic components 23 are provided at the three optimal positions at the front, middle, and rear to optimize performance.

[0077] In this embodiment, the elastic component 23 is a leaf spring structure. The leaf spring is a continuous solid structure that provides elastic buffering in the feeding and discharging directions for the crushing load-bearing base plate 7, while also providing enhanced strength in the vertical direction, further improving impact resistance. Multiple sets of fixing studs (not shown) are provided on both sides of the upper part of the support frame 4, and connecting waist-shaped holes (not shown) are provided on both sides of the corresponding positions of the crushing load-bearing base plate 7. The waist-shaped holes fit over the fixing studs, and a longitudinal limiting nut 30 is provided on the upper part of the fixing studs. The multiple sets of fixing studs provide stable support points, ensuring that the crushing load-bearing base plate 7 is fixed in the correct position. The connecting waist-shaped holes on both sides of the crushing load-bearing base plate 7 allow for fine-tuning of the base plate within a certain range, cooperating with the elastic component 23 for elastic fine-tuning in the feeding and discharging directions. The longitudinal limiting nut 30 is installed on the upper part of the fixing studs to lock the position, restricting the longitudinal movement of the crushing load-bearing base plate 7, preventing positional deviation during operation, and ensuring equipment stability and safety. The discharge section is connected to a roller device for conveying and screening the discharged material. An elastic expansion joint is provided between the front of the crushing load-bearing base plate 7 and the power conveying roller 5, and an elastic expansion joint is provided between the rear of the crushing load-bearing base plate 7 and the discharge section to prevent interference and collision.

[0078] In other specific embodiments, the primary crusher a of the tracked impact roller crusher a has a discharge particle size of 0-350mm. The subsequent process of the tracked impact roller crusher a includes a Raine crusher e and several tracked mobile conveyor belts c. This process can be arbitrarily changed and combined according to different mining locations. The several tracked mobile conveyor belts c can be placed before or after the secondary crusher. The secondary crushing uses the Raine crusher e, which has a screening function, and can achieve a discharge particle size control of 0-120mm without a vibrating screen. The particle size can be adjusted according to the design.

[0079] This embodiment enables the entire device to move flexibly, adapting to the complex environment of a mining quarry face. The tracked crushing station comprising the initial crushing process and its interconnected tracked conveyor belts can all move freely. The conveying distance can be easily achieved by adding or removing mobile conveyor belts, exhibiting excellent mobility in station movement and adaptability to the work site. It eliminates the need for various preliminary preparations required before the installation of a fixed crushing station, allowing for quick station adjustments and immediate commencement of operation.

[0080] The tracked crushing device in this embodiment fully considers strength, stability, energy efficiency, adaptability, and material handling efficiency in its design and mechanical structure, achieving efficient and reliable in-situ coarse crushing operations in mines. It not only improves equipment performance and efficiency but also reduces operating costs and maintenance difficulty, bringing significant economic benefits and practical value to users.

[0081] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A process for in-situ mobile head section processing of ore in a stepped quarry face, characterized in that: include: A tracked impact roller crusher is installed in situ at the quarry face. The tracked impact roller crusher includes a tracked drive unit, a heavy-duty chain scraper conveyor connected to the tracked drive unit, and an impact roller crushing device installed above the heavy-duty chain scraper conveyor. The tracked impact roller crusher receives, transports, and crushes the ore mined in situ at the quarry face. Multiple tracked mobile conveyor belts, each including a movable tracked drive base and a conveyor belt body mounted thereon, are connected end-to-end to transport materials. The quarry face includes a top quarry face located at the top of the mountain and tiered quarry faces located at the bottom of the mountain. The rearmost part of the tracked mobile conveyor conveys material to the edge of the quarry face. Utilizing the elevation difference of the mountain, the conveyed material rolls down the mountainside from the quarry face to the transfer warehouse at the foot of the mountain, or is directly transported down the mountainside to the transfer warehouse using a long-distance conveyor belt. The heavy-duty chain scraper conveyor includes an integrally formed feeding section, concave section, and discharge section. The feeding section is located in front of the impact roller crusher, the discharge section is located behind the impact roller crusher, and the concave section is located below the impact roller crusher. A support frame is provided on the support trough of the concave section. Multiple parallel power conveying rollers are arranged sequentially on the support frame from the feeding direction to the discharge direction. The outer circumference of the power conveying rollers is provided with a spiral guide rail that guides in the feeding direction. The upper surface of the power conveying rollers is not higher than the upper conveying plane of the heavy-duty chain scraper conveyor. A crushing load-bearing base plate is connected to the discharge section of the power conveying rollers and is located below the impact roller crusher. The crushing load-bearing base plate is connected to the support trough through the support frame and is elastically connected to the support trough along the feeding direction. The discharge section is located behind the crushing load-bearing base plate. The impact roller crusher includes a housing and rollers. The rollers are mounted on the support groove via bearing seats, placing them within the crushing chamber above the crushing load-bearing base plate. The impact roller crusher includes a drive motor, which drives the V-belt pulley at the end of the rollers to rotate via a V-belt, thereby causing the rollers to rotate at high speed. The crushing load-bearing base plate and the inner cavity of the housing together form the crushing chamber. The feed inlet of the impact roller crusher is located above the crushing load-bearing base plate. The distance between the outer edge of the foremost hammer of the roller, which is the first to feed material, and the vertical projection of this hammer onto the crushing load-bearing base plate, and the foremost outer edge of the crushing load-bearing base plate, is no greater than half the vertical projection distance between the foremost hammer and the crushing load-bearing base plate.

2. The in-situ moving head section processing technology for stepped mining faces according to claim 1, characterized in that: The heavy-duty chain scraper conveyor includes support troughs on both sides, which are connected to the carrier frame of the tracked drive unit. A drive sprocket is provided at one end of each side of the trough, and multiple redirecting sprockets are provided at the other end and at the corner of the concave section. High-strength wear-resistant chain links are fitted on the drive sprockets and the redirecting sprockets. Scrapers are evenly spaced on the high-strength wear-resistant chain links. The main shaft of the drive sprocket is connected to a motor drive assembly.

3. The in-situ moving head section processing technology for stepped mining faces according to claim 1, characterized in that: The crushing load-bearing base plate is set at a slight inclination with the feed end lower and the discharge end higher, and the acute angle between it and the horizontal plane is no more than 5 degrees. The upper edge of the feed end of the crushing load-bearing base plate is higher than the upper edge of the power conveying roller, and the height difference is no more than one-tenth of the feed opening size of the impact roller crusher device.

4. The in-situ moving head section processing technology for stepped mining faces according to claim 1, characterized in that: A reinforcing rib is horizontally arranged below the crushing load-bearing base plate. The reinforcing rib includes a first plane that extends horizontally and is perpendicular to the material feeding and discharging direction. The first plane is connected to an elastic component with an elastic force perpendicular to it. The elastic component is connected to a bearing plate. Both ends of the bearing plate extend from both sides of the concave section and are connected to fixed piles. The fixed piles are used to be inserted into the underground of the quarry working face for pile fixing.

5. The in-situ moving head section processing technology for stepped mining faces according to claim 4, characterized in that: The reinforcing rib is provided as at least one, and the reinforcing rib is provided on the plumb surface where the foremost hammer head of the roller is located.

6. The in-situ moving head section processing technology for stepped mining faces according to claim 4, characterized in that: The elastic component is a leaf spring.

7. The in-situ moving head section processing technology for stepped mining faces according to claim 1, characterized in that: Multiple sets of fixing studs are provided on the upper two sides of the support frame, and connecting waist-shaped holes are provided on the corresponding sides of the crushing load-bearing base plate. The waist-shaped holes are fitted onto the fixing studs, and longitudinal limiting nuts are provided on the upper part of the fixing studs.

8. The in-situ moving head section processing technology for stepped mining faces according to claim 1, characterized in that: The discharge section connects the roller device and the discharge conveyor belt.

9. The in-situ moving head section processing technology for stepped mining faces according to claim 1, characterized in that: The subsequent process of the tracked impact roller crusher is a Raine crusher, the discharge particle size of which is 0-120mm, and the primary crusher discharge particle size of the tracked impact roller crusher is 0-350mm.

Images