Transportation system for strip mine

Abstract

The invention provides a transportation system for a strip mine, and belongs to the technical field of mine traffic. The transportation system comprises a first bridge and a transportation assembly, one end of the first bridge is in lap joint with a first stripping step of the strip mine, the other end of the first bridge is in lap joint with a second stripping step, and the middle of the first bridge is located above a mining area; at least one first track is arranged in the upper surface, away from the mining area, of the first bridge, and the two opposite ends of the first track are located on the opposite end faces of the first bridge correspondingly; the transportation assembly comprises at least one first transportation skip bucket, the first transportation skip bucket is movably located in one of the first rails, and the first transportation skip bucket can walk in the first rail where the first transportation skip bucket is located. According to the invention, the transportation cost of rock or soil can be reduced.

Description

Technical Field

[0001] This disclosure belongs to the technical field of mine transportation, and particularly relates to a transportation system for open-pit mines. Background Art

[0002] In large open-pit mines, the mineral products are buried at a relatively deep depth, and there is a large amount of rock and soil covering the mineral products. Therefore, before the mineral products in the open-pit mine are mined out, it is necessary to start stripping on the steep side walls on the opposite sides of the mineral products and gradually push down to form a mine pit, so that the minerals are exposed in the mine pit. The stripped rock and soil need to be centrally transported to one side of the mine pit to form a waste dump area. That is to say, the first side of the mine pit is formed by a plurality of continuous first stripping steps from top to bottom, and the second side is formed by a plurality of second stripping steps from top to bottom. The waste dump area is located at a certain second stripping step. The mining area for mining minerals is formed between the nearest first stripping step and the second stripping step.

[0003] In the related art, when the mine pit is formed, the stripped rock is loaded onto a small truck, and then the small truck bypasses along the outer periphery of the open-pit mine pit to the waste dump.

[0004] Since the mine pit is large and the distance from the first side to the second side of the mine pit is far, the distance that the small truck bypasses when transporting rock or soil is long, so the fuel consumption of the small truck is high and the transportation cost is high. Summary of the Invention

[0005] An embodiment of this disclosure provides a transportation system for an open-pit mine, which can reduce the transportation cost of rock or soil. The technical solution is as follows:

[0006] An embodiment of this disclosure provides a transportation system for an open-pit mine. The open-pit mine includes a mining area, a plurality of first stripping steps on one side of the mining area, and a plurality of second stripping steps on the other side of the mining area. The transportation system includes a first bridge and a transportation component. One end of the first bridge is lapped on one of the first stripping steps, and the other end is lapped on one of the second stripping steps. The middle part of the first bridge is located above the mining area; at least one first track is provided on the upper surface of the first bridge far from the mining area, and the opposite ends of the first track are respectively located on the opposite end faces of the first bridge; the transportation component includes at least one first transportation skip, and the first transportation skip is movably located in one of the first tracks, and the first transportation skip can travel in the first track where it is located.

[0007] In yet another implementation of the present disclosure, the first bridge includes a main bridge and a tail bridge. The first end of the main bridge is lapped on the first stripping step, the second end of the main bridge is rotatably connected to the first end of the tail bridge, the second end of the tail bridge is lapped on the second stripping step, and the rotation axis of the main bridge and the tail bridge is perpendicular to the upper surface of the first bridge.

[0008] In yet another implementation of the present disclosure, at least one first sub-track is provided in the upper surface of the main bridge, and at least one second sub-track is provided in the upper surface of the tail bridge. The first sub-tracks and the second sub-tracks correspond to each other one by one, and the corresponding first sub-track and second sub-track form a first track. The transport skip located in the first sub-track is used to transfer the loaded items into the transport skip located in the second sub-track.

[0009] In yet another implementation of the present disclosure, the tail bridge includes a tail bridge span, a first support platform, and a first steering platform. The first support platform is rotatably connected to one end of the tail bridge span through a rotary bearing, and the top of the first support platform is connected to the main bridge. The first steering platform is connected to the other end of the tail bridge span, and the first steering platform can translate in a plane parallel to the plane where the upper surface of the first bridge is located. The first steering platform is used to drive the tail bridge span to rotate relative to the main bridge with the first support platform as the axis.

[0010] In yet another implementation of the present disclosure, the first sub-track includes an entrance section, an exit section, and an intermediate section. One end of the intermediate section is connected to the entrance section, and the other end is connected to the exit section. Alternatively, the first sub-track includes an entrance section, an exit section, and a plurality of intermediate sections. The plurality of intermediate sections are arranged at intervals along the axis direction of the rotation axis of the main bridge and the tail bridge, and one end of each intermediate section is connected to the entrance section, and the other end is connected to the exit section.

[0011] In yet another implementation of the present disclosure, along the direction from the entrance section to the exit section, the entrance section is a downhill section, and the exit section is an uphill section.

[0012] In yet another implementation of the present disclosure, the first transport skip includes a frame main body, a tipping movable door, and a pushing driving member. The top of the frame main body has a first opening for loading materials, and the bottom has a second opening for dumping materials. The tipping movable door is rotatably located in the frame main body and is used to close the second opening. The pushing driving member is respectively connected to the frame main body and the tipping movable door, and is used to drive the tipping movable door to rotate to close or open the second opening.

[0013] In yet another implementation manner of the present disclosure, the transportation system further includes a second bridge. The second bridge is located below the first bridge. One end of the second bridge is lapped on another first stripping step, and the other end is lapped on another second stripping step, and the middle part is spaced from and connected to the first bridge. At least one second track is provided on the upper surface of the second bridge facing the first bridge, and the extending direction of the second track is the same as that of the first track. The transportation assembly further includes at least one second transportation skip, and the second transportation skip is movably located in the second track and can travel in the second track where it is located.

[0014] In yet another implementation manner of the present disclosure, the second bridge includes a second bridge span, a second support platform, and a second turning platform. The second support platform is rotatably connected to one end of the second bridge span through a rotary bearing, and the top of the second support platform is connected to the first bridge. The second turning platform is connected to the other end of the second bridge span, and the second turning platform can translate in a plane parallel to the upper surface of the first bridge. The second turning platform is used to drive the second bridge span to rotate relative to the first bridge with the second support platform as the axis.

[0015] In yet another implementation manner of the present disclosure, the first support platform includes a platform main body, a plurality of pile legs, and a plurality of traveling mechanisms. The plurality of pile legs are spaced at the bottom of the platform main body, and the plurality of traveling mechanisms correspond to the plurality of pile legs one by one, and each traveling mechanism is connected to the corresponding pile leg.

[0016] The beneficial effects brought by the technical solution provided by the embodiments of the present disclosure at least include:

[0017] When the transportation system provided by the embodiments of the present disclosure is used in an open-pit coal mine, since the transportation system includes a first bridge, and one end of the first bridge is lapped on the first stripping step of the open-pit mine, and the other end is lapped on the second stripping step, and the middle part of the first bridge is located above the mining area, a transportation channel connecting the first stripping step and the second stripping step can be constructed through the first bridge, so that the transportation assembly can freely travel between the first stripping step and the second stripping step, avoiding detours of the transportation assembly and greatly reducing costs.

[0018] Moreover, at least one first track is provided on the upper surface of the first bridge away from the mining area, and the opposite ends of the first track are respectively located on the opposite end faces of the first bridge. The transportation assembly includes at least one first transportation skip, which is movably located in one of the first tracks and can travel in the first track where it is located. Therefore, the first transportation skip can be used to load materials such as rocks stripped at the first stripping bench, and through the first track, the first transportation skip can transport the loaded materials to the second stripping bench (i.e., the waste dump area). That is to say, the above transportation system enables the first transportation skip to travel above the mining area, reducing the reciprocating movement distance of the first transportation skip between the first stripping bench and the waste dump area, thereby reducing the transportation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Schematic structural diagram of an open-pit mine in the related art;

[0021] Figure 2 is Figure 1 top view of;

[0022] Figure 3 Schematic structural diagram of a transportation system for an open-pit mine provided by an embodiment of the present disclosure;

[0023] Figure 4 is Figure 3 top view of;

[0024] Figure 5 is Figure 4 Schematic diagram of the state where the middle and tail bridge rotates relative to the main bridge in;

[0025] Figure 6 is Figure 3 Schematic structural diagram of the first sub-track in;

[0026] Figure 7 is Figure 6 Enlarged schematic diagram of the right part structure in;

[0027] Figure 8 Schematic structural diagram of the first transportation skip;

[0028] Figure 9 is Figure 8 top view of;

[0029] Figure 10 is Figure 8 side view;

[0030] Figure 11 is a schematic structural diagram of the first support platform;

[0031] Figure 12 is Figure 11 side view.

[0032] The meanings of the symbols in the figure are as follows:

[0033] 100, the first stripping step; 200, the second stripping step; 300, the mining area;

[0034] 1, the first bridge; 10, the first track; 101, the first sub-track; 1011, the entrance section; 1012, the exit section; 1013, the middle section; 1131, the lower inclined section; 1132, the straight section; 1133, the upper inclined section; 102, the second sub-track; 11, the main bridge; 111, the main bridge span; 112, the third support platform; 113, the first support oil cylinder; 12, the tail bridge; 121, the tail bridge span; 122, the first support platform; 123, the first steering platform; 125, the upper slewing bearing; 126, the lower slewing bearing; 1221, the platform main body; 1222, the pile leg; 1223, the traveling mechanism; 1224, the double-layer slewing bearing; 1225, the slewing wing plate; 1226, the support base; 1227, the horizontal oil cylinder; 1228, the vertical oil cylinder; 1229, the connecting plate; 1230, the horizontal roller;

[0035] 2, the transportation component; 21, the first transportation skip; 211, the frame main body; 212, the tipping movable door; 2121, the movable door panel; 213, the pushing drive member; 2110, the first opening; 2111, the second opening; 214, the rolling wheel set; 22, the second transportation skip;

[0036] 3, the second bridge; 30, the second track; 31, the second bridge span; 32, the second support platform; 33, the second steering platform; 34, the second support oil cylinder. Specific embodiments

[0037] To make the purpose, technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0038] Figure 1 is a schematic structural diagram of an open-pit mine in the related art. Combining with Figure 1, during the mining process of an open-pit mine, it is necessary to continuously strip the rock and soil above the mineral product to expose the mineral product. When stripping the rock, it is often carried out layer by layer and the stripped rock is transported away. The layers of stripping form stepped stripping benches. The area where the rock is transported forms a waste dump area. Among them, in order to quickly form stripping, it often starts from the steep slopes on both sides of the mineral product and then gradually advances downwards. That is to say, the stripping benches include a plurality of first stripping benches 100 and a plurality of second stripping benches 200 in the east-west direction. A plurality of first stripping benches 100 are all located on the west side of the mineral product (that is, Figure 1 the left side in Figure 1 ), and a plurality of second stripping benches 200 are all located on the east side of the mineral product (that is, Figure 1 the right side in

[0039] Figure 2 ). The waste dump area is located at one of the second stripping benches 200. The mining area 300 of the mineral product (that is, the working face for mining minerals) is located between two adjacent first stripping benches 100 and second stripping benches 200. And the extending direction of each stripping bench is from south to north, that is, the stripping direction is from south to north. The stripped rock and other materials are loaded into the truck for transfer. For Figure 1 the top view of Figure 2 , a plurality of first stripping benches 100 are respectively the topmost stripping layer with an elevation of 1160 mm, the bottommost stripping layer with an elevation of 1100 mm, and other stripping layers located between the topmost and bottommost layers. The mining area 300 is also stepped, including mineral layers with elevations of 1085 mm and 1075 mm. A plurality of second stripping benches 200 are respectively stripping layers with elevations of 1100 mm, 1130 mm, and 1160 mm. The waste dump area is located at the second stripping bench 200. The truck is located on the south side of the first stripping bench 100.

[0040] An embodiment of the present disclosure provides a transportation system for an open-pit mine. As Figure 3 shown, the transportation system includes a first bridge 1 and a transportation component 2. One end of the first bridge 1 is lapped on a first stripping bench 100 of the open-pit mine, and the other end is lapped on a second stripping bench 200. The middle part of the first bridge 1 is located above the mining area 300 of the open-pit mine.

[0041] Figure 4 For Figure 3 the top view of Figure 4, at least one first track 10 is provided on the upper surface of the first bridge 1 away from the mining area 300, and the opposite ends of the first track 10 are respectively located on the opposite end faces of the first bridge 1. The transportation component 2 includes at least one first transportation skip 21, and the first transportation skip 21 is movably located in one of the first tracks 10, and the first transportation skip 21 can travel in the first track 10 where it is located.

[0042] When the transportation system provided by the embodiments of the present disclosure is used in an open-pit coal mine, since the transportation system includes the first bridge 1, and one end of the first bridge 1 is lapped on the first stripping bench 100 of the open-pit mine, and the other end is lapped on the second stripping bench 200, and the middle part of the first bridge 1 is located above the mining area 300, a transportation channel connecting the first stripping bench 100 and the second stripping bench 200 can be constructed through the first bridge 1, so that the transportation component 2 can freely travel between the first stripping bench 100 and the second stripping bench 200, avoiding the detour of the transportation component 2 and greatly reducing the cost.

[0043] Also, because at least one first track 10 is provided on the upper surface of the first bridge 1 away from the mining area 300, and the opposite ends of the first track 10 are respectively located on the opposite end faces of the first bridge 1. The transportation component 2 includes at least one first transportation skip 21, and the first transportation skip 21 is movably located in one of the first tracks 10, and the first transportation skip 21 can travel in the first track 10 where it is located. Therefore, the first transportation skip 21 can load materials such as rocks stripped at the first stripping bench 100 (that is, the truck first transfers the materials to the first transportation skip 21), and through the first track 10, the first transportation skip 21 can transport the loaded materials to the waste dump area. That is to say, the above transportation system can make the first transportation skip 21 travel above the mining area 300, reducing the reciprocating movement distance of the first transportation skip 21 between the first stripping bench 100 and the waste dump area, thereby reducing the transportation cost.

[0044] Figure 5 For Figure 4 the schematic diagram of the state where the middle and tail bridge rotates relative to the main bridge, combined with Figure 5 , optionally, the first bridge 1 includes a main bridge 11 and a tail bridge 12. The first end of the main bridge 11 is lapped on a first stripping bench 100, the second end of the main bridge 11 is rotatably connected to the first end of the tail bridge 12, the second end of the tail bridge 12 is lapped on a second stripping bench 200, and the rotation axis of the main bridge 11 and the tail bridge 12 is perpendicular to the upper surface of the first bridge 1.

[0045] In the above implementation, the first bridge 1 is set as the main bridge 11 and the tail bridge 12, and the second end of the main bridge 11 is rotatably connected to the first end of the tail bridge 12, so that the tail bridge 12 can rotate relative to the main bridge 11, enabling the first transport skip 21 to transfer the transported rocks to multiple positions in the waste dump area after moving through the tail bridge 12, thereby expanding the dumping area.

[0046] Optionally, at least one first sub-track 101 is provided on the upper surface of the main bridge 11, and at least one second sub-track 102 is provided on the upper surface of the tail bridge 12. The first sub-tracks 101 and the second sub-tracks 102 correspond one by one, and the corresponding first sub-track 101 and second sub-track 102 form a first track 10. The first transport skip 21 located in the first sub-track 101 is used to transfer the loaded items into the first transport skip 21 located in the second sub-track 102.

[0047] That is to say, in the above solution, the first bridge 1 is only responsible for transporting rocks. The first transport skip 21 transports the rocks to the place connected to the tail bridge 12, and then the first transport skip 21 on the first bridge 1 pours the loaded rocks into the first transport skip 21 in the tail bridge 12, and the first transport skip 21 on the tail bridge 12 then dumps the rocks into the designated area.

[0048] Optionally, the tail bridge 12 includes a tail bridge span 121, a first support platform 122, and a first steering platform 123. The first support platform 122 is rotatably connected to one end of the tail bridge span 121, and the top of the first support platform 122 is connected to the main bridge 11.

[0049] The first steering platform 123 is connected to the other end of the tail bridge span 121, and the first steering platform 123 can translate in a plane parallel to the upper surface of the first bridge 1, and the moving direction of the first steering platform 123 is perpendicular to the length direction of the first bridge 1. The first steering platform 123 is used to drive the tail bridge span 121 to rotate relative to the main bridge 11 with the first support platform 122 as the axis.

[0050] In the above implementation, the tail bridge span 121 is used for the first transport skip 21 to travel. The first support platform 122 is used to be connected to the main bridge 11 and is rotatably connected to the tail bridge span 121 at the same time, so as to realize the rotational connection between the tail bridge 12 and the main bridge 11. The first steering platform 123 is used to drive the tail bridge span 121 to rotate relative to the main bridge 11.

[0051] That is to say, the tail bridge span 121 is supported by two support points (including the first support platform 122 and the first steering platform 123). In this embodiment, the first support platform 122 is located on the stripping layer with an elevation of 1100 mm in the second stripping bench 200, and the first steering platform 123 is located in the second stripping bench 200 and on the stripping layer with an elevation of 1160 mm.

[0052] Figure 6 is Figure 3 a schematic structural diagram of the first sub-orbit in, combined with Figure 6 , optionally, the first sub-orbit 101 includes an entrance section 1011, an exit section 1012, and a plurality of intermediate sections 1013. The plurality of intermediate sections 1013 are arranged at intervals along the axial direction of the rotation axis of the main bridge 11 and the tail bridge 12, and one end of each intermediate section 1013 is connected to the entrance section 1011, and the other end is connected to the exit section 1012.

[0053] In the above implementation, setting each first sub-orbit 101 to the above structure can make the middle part of the first sub-orbit 101 be one layer or multiple layers, thereby increasing the walking route of the first transport skip 21 to improve the transport efficiency, and can also prevent the first transport skip 21 from colliding when meeting in the middle.

[0054] In this embodiment, there are two intermediate sections 1013, and the two intermediate sections 1013 are arranged at intervals along the axial direction of the rotation axis of the main bridge 11 and the tail bridge 12, and one end of each intermediate section 1013 in the two intermediate sections 1013 is connected to the entrance section 1011, and the other end is connected to the exit section 1012. That is to say, the upper and lower two-layer tracks converge at both ends of the first sub-orbit 101 and are at the same height.

[0055] Optionally, the number of the intermediate sections 1013 can also be one. At this time, the first sub-orbit 101 includes an entrance section 1011, an exit section 1012, and one intermediate section 1013. One end of the intermediate section 1013 is connected to the entrance section 1011, and the other end is connected to the exit section 1012.

[0056] In other examples, the number of the intermediate sections 1013 can also be other numbers, such as three, four, etc., as long as it is convenient to arrange on the main bridge 11.

[0057] Optionally, along the direction from the entrance section 1011 to the exit section 1012, the entrance section 1011 is a downhill section, and the exit section 1012 is an uphill section.

[0058] In the above implementation, the entrance section 1011 being a downhill section can make the entrance section 1011 present an inclined state with a certain angle downward. That is to say, when the first transport skip 21 walks from left to right on the entrance section 1011, the height where it is located gradually decreases. The exit section 1012 being an uphill section can make the exit section 1012 present an inclined state with a certain angle upward.

[0059] That is to say, when the first transport skip 21 travels from left to right on the exit section 1012, the height at which it is located gradually increases. The reason for such an arrangement is that since the first transport skip 21 transports materials (rocks or soil in this embodiment) at a relatively high speed. If the first sub-track 101 is designed to be completely horizontal, in order for the first transport skip 21 filled with rocks to reach the required speed within the effective distance, the acceleration will be very large, resulting in a large acceleration power. When approaching the end point, to stop within the specified time, a large deceleration braking force is required. In order to minimize the power of the power mechanism and the braking force of the first transport skip 21 during operation and save operating costs. The two ends of the first sub-track 101 are arranged in an inclined structure. When the first transport skip 21 filled with rocks runs downward along the entrance section 1011, the component force of the self-weight of the equipment is utilized to help the first transport skip 21 accelerate to the predetermined speed. When the first transport skip 21 needs to decelerate when approaching the end point through the exit section 1012, the upward inclination of the exit section 1012 is utilized, and the component force of the self-weight of the first transport skip 21 and the rocks together helps the first transport skip 21 decelerate, greatly reducing the braking force during deceleration and stopping. That is to say, the entrance section 1011 and the exit section 1012 are respectively the acceleration and deceleration sections.

[0060] In this embodiment, in order to further reduce the transportation cost, along the axial direction of the rotation axis of the main bridge 11 and the tail bridge 12, the extension direction of the middle section 1013 farthest from the mining area 300 is perpendicular to the rotation axis of the main bridge 11 and the tail bridge 12. Since the middle section 1013 farthest from the mining area 300 is horizontal, the first transport skip 21 only needs a very small traction force to operate.

[0061] The middle sections 1013 located between the middle section 1013 farthest from the mining area 300 and the mining area 300 all include a downward inclined section 1131, a straight section 1132, and an upward inclined section 1133 that are connected in sequence. One end of the downward inclined section 1131 far from the straight section 1132 is connected to the entrance section 1011, and one end of the upward inclined section 1133 far from the straight section 1132 is connected to the exit section 1012. The straight section 1132 is perpendicular to the rotation axis of the main bridge 11 and the tail bridge 12. This can also reduce the braking force when the first transport skip 21 decelerates and stops.

[0062] Combined Figure 3 , in this embodiment, optionally, one end of the second sub-track 102 facing the first sub-track 101 gradually approaches the mining area 300 along the direction from the second sub-track 102 to the first sub-track 101.

[0063] In the above implementation, the length of the tail bridge 12 is much smaller than that of the main bridge 11. Therefore, the length of the second sub-rail 102 is short. When the first transport skip 21 runs on the second sub-rail 102, its speed is not high, and a relatively slow acceleration can also meet the transportation requirements. Therefore, the second sub-rail 102 has no curvature and is set straight, but has a certain downward inclination. Since the skip filled with rocks runs from left to right, when it is heavily loaded, the component of the self-weight of the equipment in the downward direction helps the first transport skip 21 to accelerate by using the downward inclination. When the empty first transport skip 21 runs from right to left, although the acceleration inclination increases the traction power, since the self-weight of the empty first transport skip 21 is greatly reduced compared to the combined self-weight of the first transport skip 21 and the rocks, the operating power of the empty first transport skip 21 will not be greater than that of the first transport skip 21 loaded with rocks. Therefore, by setting an inclination in the second sub-rail 102, the driving power of the power mechanism of the first transport skip 21 on the tail bridge 12 can be effectively reduced.

[0064] In this embodiment, there are two first sub-rails 101, and four first transport skips 21 are correspondingly arranged. There are also two second sub-rails 102, and two first transport skips 21 are correspondingly arranged.

[0065] Figure 7 For Figure 6 the enlarged schematic view of the right-middle part of the structure, in combination with Figure 7 , in the embodiment of the present disclosure, the first support platform 122 is rotationally connected to the tail bridge span 121 through the first upper slewing bearing 125 and the first lower slewing bearing 126. The inner ring of the first upper slewing bearing 125 is fixedly connected to the main bridge 11 through fasteners, and the outer ring of the first upper slewing bearing 125 is fixedly connected to the tail bridge span 121 through fasteners. The outer ring of the first lower slewing bearing 126 is fixedly connected to the tail bridge span 121 through fasteners, and the inner ring of the first lower slewing bearing 126 is fixedly connected to the first support platform 122 through fasteners. When the tail bridge span 121 rotates relative to the main bridge 11, the inner ring of the first upper slewing bearing 125 and the outer ring of the first lower slewing bearing 126 swing together with the tail bridge span 121, while the outer ring of the first upper slewing bearing 125 remains fixed together with the main bridge 11, and the inner ring of the first lower slewing bearing 126 and the first support platform 122 remain stationary together.

[0066] Among them, the first upper slewing bearing 125 and the first lower slewing bearing 126 are not provided with a power mechanism for driving. When the first steering platform 123 moves, it will naturally drive the tail bridge span 121 to swing.

[0067] Continue to refer to Figure 3 and Figure 4, Optionally, the transportation system further includes a second bridge 3, which is located below the first bridge 1. One end of the second bridge 3 is lapped on another first stripping step 100, the other end is lapped on another second stripping step 200, and the middle part is spaced from and connected to the first bridge 1.

[0068] On the upper surface of the second bridge 3 facing the first bridge 1, there is at least one second track 30, and the extending direction of the second track 30 is the same as that of the first track 10. The transportation assembly 2 further includes at least one second transportation skip 22, and the second transportation skip 22 is movably located in the second track 30, and the second transportation skip 22 can travel in the second track 30 where it is located.

[0069] In the above implementation, the second bridge 3 is used to provide a walking route for the second transportation skip 22, so as to further improve the transportation efficiency.

[0070] In other words, the second bridge 3 is used to provide an installation foundation for the second track 30, and the design of the second track 30 can increase the passing roads of the second transportation skip 22, thereby improving the transportation efficiency.

[0071] Optionally, the second bridge 3 includes a second bridge span 31, a second support platform 32 and a second steering platform 33. The second support platform 32 is rotatably connected to one end of the second bridge span 31 through a rotary bearing, and the top of the second support platform 32 is connected to the first bridge 1.

[0072] The second steering platform 33 is connected to the other end of the second bridge span 31, and the second steering platform 33 can translate in a plane parallel to the upper surface of the first bridge 1, and the moving direction of the second steering platform 33 is the same as the length direction of the second bridge 3. The second steering platform 33 is used to drive the second bridge span 31 to rotate relative to the first bridge 1 with the second support platform 32 as the axis.

[0073] In the above implementation, the second bridge span 31 is used to realize the connection between the first stripping step 100 and the second stripping step 200, and provide conditions for the walking of the second transportation skip 22. The second support platform 32 is used to be connected to the first bridge 1 and rotatably connected to the second bridge span 31 at the same time, so as to realize the rotational connection between the second bridge 3 and the first bridge 1. The second steering platform 33 is used to drive the second bridge span 31 to rotate relative to the first bridge 1.

[0074] In the embodiments of the present disclosure, the second support platform 32 is rotatably connected to the second bridge span 31 through a second upper slewing bearing and a second lower slewing bearing. The inner ring of the second upper slewing bearing is fixedly connected to the first bridge 1 through fasteners, and the outer ring of the second upper slewing bearing is fixedly connected to the second bridge span 31 through fasteners. The outer ring of the second lower slewing bearing is fixedly connected to the second bridge span 31 through fasteners, and the inner ring of the second lower slewing bearing is fixedly connected to the second support platform 32 through fasteners. When the second bridge span 31 rotates relative to the first bridge 1, the inner ring of the second upper slewing bearing and the outer ring of the second lower slewing bearing swing together with the second bridge span 31, while the outer ring of the second upper slewing bearing and the first bridge 1 (i.e., the main bridge 11) are fixedly stationary, and the inner ring of the second lower slewing bearing and the second support platform 32 are stationary together.

[0075] Among them, no power mechanism is provided for driving the second upper slewing bearing and the second lower slewing bearing. When the second steering platform 33 moves forward, it will naturally drive the second bridge span 31 to swing.

[0076] Optionally, the second bridge 3 further includes a plurality of second support cylinders 34. The tops of a part of the plurality of second support cylinders 34 are respectively connected to the first end of the second bridge span 31, and the bottoms are located on the first stripping step 100. The tops of another part of the plurality of second support cylinders 34 are respectively connected to the second end of the second bridge span 31, and the bottoms are located on the second stripping step 200.

[0077] In the above implementation manner, the second support cylinders 34 are used to support the two ends of the second bridge span 31 at the first stripping step 100 and the second stripping step 200 respectively.

[0078] That is to say, the second bridge span 31 is supported by four support points. A part of the second support cylinders 34 is located on the stripping layer with an elevation of 1100 mm in the first stripping step 100), and another part is located on the stripping layer with an elevation of 1100 mm in the second stripping step 200. The second support platform 32 is located on the material layer with an elevation of 1085 mm in the mining area 300, and the second steering platform 33 is located on the material layer with an elevation of 1075 mm in the mining area 300.

[0079] Optionally, the main bridge 11 includes a main bridge span 111, a third support platform 112, and a plurality of first support cylinders 113. The third support platform 112 and the plurality of first support cylinders 113 are both located on the side of the main bridge span 111 facing the mining area 300. The tops of the plurality of first support cylinders 113 are connected to the first end of the main bridge span 111, and the bottoms are located on the first stripping bench 100. The top of the third support platform 112 is connected to the middle of the main bridge span 111, and the bottom of the third support platform 112 is located on the first stripping bench 100. The second end of the main bridge span 111 is connected to the first support platform 122. The middle of the main bridge span 111 is connected to the second support platform 32.

[0080] In the above implementation, the third support platform 112 is used to support the middle of the main bridge span 111, and the first support cylinder 113 is used to lap one end of the main bridge span 111 on the first stripping bench 100.

[0081] That is to say, in this embodiment, the main bridge span 111 is supported by four support points (including the first support cylinder 113, the first support platform 122, the second support platform 32, and the third support platform 112). Among them, the first support cylinder 113 is located on the topmost stripping layer (the stripping layer with an elevation of 1145 mm) of the first stripping bench 100, and the third support platform 112 is located on the stripping layer with an elevation of 1115 mm of the first stripping bench 100.

[0082] Figure 8 For the structural schematic diagram of the first transportation skip, combined with Figure 8 , optionally, the first transportation skip 21 and the second transportation skip 22 have the same structure, and both include a frame main body 211, a tipping movable door 212, and a pushing driving member 213. The top of the frame main body 211 has a first opening 2110 for loading materials, and the bottom has a second opening 2111 for dumping materials. The tipping movable door 212 is rotatably located in the frame main body 211 and is used to close the second opening 2111.

[0083] The pushing driving member 213 is respectively connected to the frame main body 211 and the tipping movable door 212, and is used to drive the tipping movable door 212 to rotate to close or open the second opening 2111.

[0084] In the above implementation, the frame main body 211 is used to provide an installation foundation for other structural members. The tipping movable door 212 is used to close the bottom of the frame main body 211, so that the two together define a space for loading materials. At the same time, the tipping movable door 212 also facilitates opening the bottom of the frame main body 211 to dump the loaded materials. The pushing driving member 213 is used to drive the tipping movable door 212 to rotate to close or open the bottom of the frame main body 211.

[0085] Figure 9is Figure 8 the top view of Figure 10 is Figure 8 the side view of, combined with Figure 9 and Figure 10 , optionally, the first opening 2110 and the second opening 2111 have the same shape, both are square openings, and the opening area of the first opening 2110 is larger than that of the second opening 2111. In this way, the first transport skip 21 can be a trumpet-shaped structure with a large upper opening and a small lower opening. This structure can ensure that when the first transport skip 21 on the main bridge 11 dumps materials into the first transport skip 21 on the tail bridge 12, the small-diameter opening is for dumping and the large-diameter opening is for receiving materials, preventing rocks from spilling out of the first transport skip 21.

[0086] Moreover, when the tail bridge 12 swings, only the first transport skip 21 on the tail bridge 12 needs to adjust its front and rear positions to ensure that the rocks in the first transport skip 21 on the main bridge 11 can be accurately poured into the first transport skip 21 on the tail bridge 12.

[0087] In this embodiment, according to the demand of transportation capacity, there are 4 first transport skips 21 on the main bridge 11. Two first transport skips 21 loaded with rocks walk from left to right at the same time, and two empty first transport skips 21 walk synchronously to the left, that is, there are two heavy-loaded first transport skips 21 and two empty first transport skips 21. On the tail bridge 12, two heavy-loaded first transport skips 21 pour materials to the right at the same time and then return to the origin.

[0088] Optionally, the dumping flap 212 includes two flap plates 2121, and the two flap plates 2121 are symmetrically arranged. The flap plate 2121 is of a special-shaped structure, and its center of gravity is on the same straight line as the rotation axis. When the flap plate 2121 is opened, the center of gravity of the flap plate 2121 deviates from the rotation axis of the flap plate 2121, and there will automatically be a gravitational rotation moment forcing the dumping flap plate 2121 to close. Therefore, this structure can help the dumping flap 212 to maintain a closed state.

[0089] The pushing drive member 213 can be two drive cylinders corresponding to the flap plates 2121 one by one, or an electric cylinder, etc.

[0090] Two rows of rolling wheel sets 214 are provided at the bottom of the frame body 211. Among them, the rolling wheel sets 214 can walk along the track, and the rolling wheel sets 214 are similar to train rollers. The rolling wheel set 214 includes multiple rolling wheels. A power device such as a motor and a reducer is arranged on the shaft corresponding to a certain rolling wheel in each rolling wheel set 214, and the operation of the first transport skip 21 can be realized.

[0091] Figure 11 is the structural schematic diagram of the first support platform, combined with Figure 11, in the embodiments of the present disclosure, the first support platform 122, the second support platform 32, and the third support platform 112 have the same structure, and each includes a platform main body 1221 and a plurality of pile legs 1222. The plurality of pile legs 1222 are spaced apart at the bottom of the platform main body 1221, and the top of the platform main body 1221 is used to connect to the supported bridge.

[0092] To enable the transportation system to move, the first support platform 122, the second support platform 32, and the third support platform 112 further include a plurality of traveling mechanisms 1223. The plurality of traveling mechanisms 1223 correspond to the plurality of pile legs 1222 one by one, and each traveling mechanism 1223 is connected to the corresponding pile leg 1222 to drive the pile leg 1222 to move along a direction perpendicular to the extension direction of the first track 10.

[0093] Figure 12 For Figure 11 side view of, combined with Figure 12 , in this embodiment, the traveling mechanism 1223 is located at the bottom of the corresponding pile leg 1222, and includes a double-layer slewing bearing 1224, a slewing wing plate 1225, a support base 1226, two horizontal oil cylinders 1227, and a plurality of vertical oil cylinders 1228.

[0094] The double-layer slewing bearing 1224 is sleeved outside the corresponding pile leg 1222, and the upper slewing bearing of the double-layer slewing bearing 1224 is directly connected to the corresponding pile leg 1222 by bolts.

[0095] The slewing wing plate 1225 is located between the upper slewing bearing and the lower slewing bearing of the double-layer slewing bearing 1224, and the outer ring of the lower slewing bearing of the double-layer slewing bearing 1224 is fixedly connected to the slewing wing plate 1225. The support base 1226 is located on the side of the slewing wing plate 1225 away from the pile leg 1222, and the support base 1226 is fixedly connected to the inner ring of the lower slewing bearing of the double-layer slewing bearing 1224.

[0096] The middle of the slewing wing plate 1225 has an inner hole, and the size of the inner hole is larger than the outer diameter of the pile leg. The slewing wing plate 1225 is similar to a wing and can rotate freely between the upper slewing bearing and the lower slewing bearing of the double-layer slewing bearing 1224, ensuring that the platform main body 1221 can turn in any 360° direction when turning. The double-layer slewing bearing 1224 is a driving unit composed of a motor and a gearbox, and the driving unit can drive the double-layer slewing bearing 1224 to rotate, thereby ensuring that the slewing wing plate 1225 and the support base 1226 can rotate at any angle.

[0097] When the platform main body 1221 is stationary, the platform main body 1221 fully relies on the support base 1226 to support all the loads during operation. The support base 1226 is a columnar solid structure (that is, a solid structure). This can increase the strength.

[0098] A plurality of vertical oil cylinders 1228 are divided into two columns and are respectively located on opposite sides of the support base 1226. The tops of the vertical oil cylinders 1228 are connected together by a connecting plate 1229. The connecting plate 1229 is in sliding fit with the slewing wing plate 1225, and a movement perpendicular to the extending direction of the first track 10 can be generated between the connecting plate 1229 and the slewing wing plate 1225. The vertical oil cylinders 1228 can support and lift the slewing wing plate 1225 to separate the support base 1226 from the ground.

[0099] Two horizontal oil cylinders 1227 are respectively located on opposite sides of the support base 1226. One end of each horizontal oil cylinder 1227 is connected to a connecting plate 1229, and the other end is connected to the slewing wing plate 1225. When the first support platform 122 needs to move, the vertical oil cylinders 1228 extend to ensure that the support base 1226 is separated from the ground, and the load above the platform main body 1221 is transferred to the vertical oil cylinders 1228. Then the horizontal oil cylinders 1227 extend or contract to drive the slewing wing plate 1225 to move horizontally, thereby driving the pile legs to move relative to the ground, and finally driving the entire platform main body 1221 to move.

[0100] In order to reduce the sliding friction between the slewing wing plate 1225 and the connecting plate 1229, a number of horizontal rollers 1230 are also provided on the connecting plate 1229. By means of the horizontal rollers 1230, the frictional resistance during the horizontal movement between the vertical oil cylinders 1228 and the slewing wing plate 1225 can be made smaller.

[0101] In this embodiment, the structures of the first steering platform 123 and the second steering platform 33 are similar to that of the first support platform 122. Only the bottom of the first support platform 122 is connected with four pile legs. For the convenience of steering of the first steering platform 123 and the second steering platform 33, the number of pile legs of the first steering platform 123 and the second steering platform 33 is two, and the two pile legs are arranged along the direction perpendicular to the extending direction of the first track 10. That is to say, when the steering platform steers, in order to improve the efficiency, only 2 pile legs are provided, that is, only the traveling mechanism 1223 with 2 legs is required to cooperate to complete the steering, reducing the number of the traveling mechanisms 1223 and improving the efficiency.

[0102] During use, when the right dumping area that the transportation system can cover is completely filled and there is no space for further dumping, the entire transportation system can be moved. The transportation system starts to move from south to north. During the movement, it is ensured that both the first bridge 1 and the second bridge 3 are in a straight line state. Then all the support platforms and steering platforms use their own lifting systems to first lift the whole by a certain height (about 200 mm) to separate the first support oil cylinder 113 under the main bridge 11 from the ground, and at the same time separate the second support oil cylinder 34 under the second bridge 3 from the ground. Then, the support platforms and steering platforms are used to realize a straight running horizontally from south to north.

[0103] When it stops after running a certain distance, the support platform and the steering platform lower the entire transportation system. After the first support oil cylinder 113 and the second support oil cylinder 34 both contact the ground, the next material transportation begins.

[0104] It should be noted that: when the entire transportation system moves from south to north to the northern extreme position of the entire open-pit mine, the traveling mechanism 1223 in the support platform and the steering platform below the transportation system rotates 90 degrees using the slewing bearing (note that here the slewing wing plate 1225 rotates 90 degrees relative to the previous state). Then, the entire transportation system moves from east to west. After moving a certain distance, it stops. Then, the stripping direction is from north to south. After several moves and reaching the southern extreme position of the open-pit mine, the transportation system repeats the above actions again to ensure that the moving direction of the pit of the entire open-pit mine gradually advances from east to west.

[0105] In this embodiment, the entire transportation system can be made of steel structural parts. This can extend the service life.

[0106] The working process of the transportation system provided by the present disclosure will be briefly introduced below:

[0107] When using this transportation system to play its transportation role, the two first transportation skip buckets 21 in the first sub-track 101 transport the rock to the right side of the first support platform 122 located at the stripping layer with an elevation of 1100 in the second stripping bench 200. At the same time, the empty first transportation skip bucket 21 in the right end of the first sub-track 101 runs to the left. When the first transportation skip bucket 21 filled with rock reaches the rightmost end, the bottom of the first transportation skip bucket 21 opens, and the rock is poured into the first transportation skip bucket 21 in the tail bridge 12. Then, the first transportation skip bucket 21 in the tail bridge 12 moves to the right to dump the rock material into the dumping area. At the same time, the tail bridge 12 swings around the first support platform 122 to expand the dumping area. See specifically Figure 5 .

[0108] The second transportation skip bucket 22 in the second bridge 3 and the first transportation skip bucket 21 in the main bridge 11 can work synchronously. After the second transportation skip bucket 22 in the second bridge 3 is filled with rock, it runs to the right to a designated area and dumps the rock into the dumping area corresponding to the second bridge 3. Moreover, the second bridge 3 can swing around the second support platform 32 to maximize the dumping area.

[0109] It can be seen that when the above transportation system transports rocks from west to east, there is no need for the truck to make a long detour, which greatly saves the transportation distance of the rocks. Moreover, since the distance between the transportation skip and the truck at the stripping bench is very short, the fuel consumption of the truck is relatively low when the truck transfers materials to the transportation skip. Compared with the original transportation method, the fuel consumption of the truck is greatly saved, and at the same time, the maintenance cost of the truck running road is reduced, which has great economic benefits. At the same time, since the transportation distance of the rocks on the transportation system is short and the transportation can be continuous, and the dumping area is relatively large, it can be widely used in open-pit mines, which has positive social benefits.

[0110] The above are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A transportation system for an open-pit mine, characterized in that: The open-pit mine comprises a mining area (300), a plurality of first stripping steps (100) located on one side of the mining area (300), and a plurality of second stripping steps (200) located on the other side of the mining area (300); The transport system comprises a first bridge (1) and a transport assembly (2), wherein one end of the first bridge (1) is overlapped on one of the first stripping steps (100), and the other end is overlapped on one of the second stripping steps (200), and the middle part of the first bridge (1) is located above the mining area (300); The upper surface of the first bridge (1) away from the mining area (300) is provided with at least one first track (10), and opposite ends of the first track (10) are respectively located on opposite end surfaces of the first bridge (1); The transport component (2) comprises at least one first transport bucket (21), which is movably located in one of the first tracks (10) and is capable of traveling in the first track (10).

2. The transportation system according to claim 1, characterized in that The first bridge (1) comprises a main bridge (11) and a tail bridge (12), wherein the first end of the main bridge (11) is overlapped on the first peeling step (100), the second end of the main bridge (11) is rotatably connected to the first end of the tail bridge (12), the second end of the tail bridge (12) is overlapped on the second peeling step (200), and the rotation axes of the main bridge (11) and the tail bridge (12) are perpendicular to the upper surface of the first bridge (1).

3. The transportation system according to claim 2, characterized in that The upper surface of the main bridge (11) has at least one first sub-track (101), and the upper surface of the tail bridge (12) has at least one second sub-track (102), the first sub-track (101) and the second sub-track (102) correspond to each other one by one, and the first sub-track (101) and the second sub-track (102) corresponding to each other form one first track (10); The first transport bucket (21) located in the first sub-track (101) is used to transfer the loaded articles into the first transport bucket (21) located in the second sub-track (102).

4. The transportation system according to claim 2, characterized in that The tail bridge (12) comprises a tail bridge span (121), a first supporting platform (122) and a first steering platform (123); The first support platform (122) is rotatably connected to one end of the tail bridge span (121) via a swivel bearing, and the top of the first support platform (122) is connected to the main bridge (11); The first steering platform (123) is connected to the other end of the tail bridge span (121), and the first steering platform (123) can translate in a plane parallel to the upper surface of the first bridge (1), and the first steering platform (123) is used to drive the tail bridge span (121) to rotate relative to the main bridge (11) with the first supporting platform (122) as the axis.

5. The transportation system according to claim 3, characterized in that The first sub-track (101) comprises an entrance section (1011), an exit section (1012) and an intermediate section (1013); one end of the intermediate section (1013) is connected to the entrance section (1011), and the other end is connected to the exit section (1012); or, The first sub-track comprises an entrance section (1011), an exit section (1012) and a plurality of intermediate sections (1013), wherein the plurality of intermediate sections (1013) are arranged at intervals along the axial direction of the rotation shafts of the main bridge (11) and the tail bridge (12), and one end of each intermediate section (1013) is connected to the entrance section (1011), and the other end is connected to the exit section (1012).

6. The transport system according to claim 5, characterized in that Along the direction from the entrance section (1011) to the exit section (1012), the entrance section (1011) is a downhill section, and the exit section (1012) is an uphill section.

7. The transport system according to any one of claims 1 to 6, characterized in that: The first transport bucket (21) comprises a frame body (211), a material dumping movable door (212) and a driving member (213); the top of the frame body (211) has a first opening (2110) for loading materials, and the bottom has a second opening (2111) for dumping materials; the material dumping movable door (212) is rotatably located in the frame body (211) and is used to close the second opening (2111); The push driving member (213) is respectively connected to the frame body (211) and the material unloading movable door (212), and the push driving member (213) is used to drive the material unloading movable door (212) to rotate so as to close or open the second opening (2111).

8. The transport system according to any one of claims 1 to 6, characterized in that: The transport system further comprises a second bridge (3), the second bridge (3) being located below the first bridge (1), one end of the second bridge (3) being overlapped on another first peeling step (100), the other end of the second bridge (3) being overlapped on another second peeling step (200), and the middle part of the second bridge (3) being spaced apart from and connected to the first bridge (1); The second bridge (3) has at least one second track (30) on its upper surface facing the first bridge (1), and the extension direction of the second track (30) is the same as the extension direction of the first track (10); The transport assembly (2) further comprises at least one second transport bucket (22), wherein the second transport bucket (22) is movably located in the second track (30), and the second transport bucket (22) is capable of traveling in the second track (30) in which it is located.

9. The transport system according to claim 8, characterized in that The second bridge (3) comprises a second bridge span (31), a second supporting platform (32) and a second turning platform (33); The second supporting platform (32) is rotatably connected to one end of the second bridge span (31) via a rotating bearing, and the top of the second supporting platform (32) is connected to the first bridge (1); The second steering platform (33) is connected to the other end of the second bridge span (31), and the second steering platform (33) can translate in a plane parallel to the upper surface of the first bridge (1). The second steering platform (33) is used to drive the second bridge span (31) to rotate relative to the first bridge (1) with the second supporting platform (32) as the axis.

10. The transportation system according to claim 3, characterized in that The first supporting platform (122) comprises a platform body (1221), a plurality of legs (1222) and a plurality of walking mechanisms (1223), wherein the plurality of legs (1222) are spaced apart at the bottom of the platform body (1221), the plurality of walking mechanisms (1223) correspond one-to-one to the plurality of legs (1222), and each of the walking mechanisms (1223) is connected to the corresponding leg (1222).

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