Stepping type walking platform for open-air slope mining

Abstract

The invention belongs to the technical field of mining equipment. In order to solve the problems that in an existing slope mining walking platform, arrangement of all mechanisms is unreasonable, and the requirements of multiple working conditions cannot be met, the open-air slope mining stepping type walking platform is provided and comprises a protection mechanism, an upper platform assembly, a dust removal mechanism, a lower platform assembly, an air supply mechanism and a discharging mechanism, and the upper platform assembly and the lower platform assembly are connected to form a whole. The protection mechanism, the dust removal mechanism and the air supply mechanism are all arranged on the upper platform assembly, the protection mechanism is arranged at the end, close to a mining chamber, of the upper platform assembly, the dust removal mechanism is connected with the air supply mechanism, and the discharging mechanism is arranged at the end, away from the mining chamber, of the lower platform assembly. The technical requirements for dust removal and unloading of the strip mine, the protection requirement of the platform and the working requirements under various working conditions are met, green mining of slope coal pressing is achieved, and the rationality and practicability of the whole platform structure are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of mining equipment, and in particular relates to a step-by-step walking platform for open-pit sidewall mining. Background Art

[0002] Open-pit coal mines refer to a type of mine where coal is mined by directly stripping off the topsoil when the coal is deposited on the surface or in shallow layers. In some areas with soft geology, landslides are prone to occur, so gentle slope mining is generally adopted. However, this method generally produces a large amount of side coal pressure, resulting in serious vacancy and waste of coal resources.

[0003] As the main way to solve the problem of side wall coal compression, side wall mining has been widely used in open-pit coal mines. The working principle of side wall mining is similar to that of single tunnel excavation underground. A continuous miner is used to gradually advance inward from the gentle slope of the side wall to mine the side wall coal. During the mining process, the entire system's transportation and advance and retreat of the cutting equipment, the movement of the entire equipment when reselecting the mining tunnel, the layout and protection of the dust removal system, electrical system and hydraulic system, and the transfer of materials transported in front all need to be implemented on the stepping walking platform. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an open-pit sidewall mining step-by-step walking platform that can meet the needs of multiple working conditions.

[0005] The present invention provides a step-by-step walking platform for open-pit sidewall mining, comprising a protective mechanism, an upper platform assembly, a dust removal mechanism, a lower platform assembly, an air supply mechanism and a unloading mechanism. The upper platform assembly is connected to the lower platform assembly to form a whole. The protective mechanism, the dust removal mechanism and the air supply mechanism are all arranged on the upper platform assembly. The protective mechanism is arranged at one end of the upper platform assembly close to the mining tunnel, the dust removal mechanism is connected to the air supply mechanism, and the unloading mechanism is arranged at one end of the lower platform assembly away from the mining tunnel.

[0006] Optionally, the upper platform assembly includes a first platform unit, a second platform unit, a third platform unit, a fourth platform unit, a fifth platform unit and a sixth platform unit connected in sequence, the first platform unit being provided with a first cable drum, the second platform unit being provided with a second cable drum, the third platform unit being provided with a water hose drum, the fourth platform unit being provided with a hydraulic pump station, the fifth platform unit being provided with an electrical system, and the sixth platform unit being provided with a frequency converter.

[0007] Optionally, the lower platform assembly includes a shovel plate, a front end head, a front stepping mechanism, a right main beam, a transport trough, a left main beam, a rear end head and a rear stepping mechanism, the front end head is connected to the rear end head as a whole through the left main beam and the right main beam, and push cylinders are provided inside the left main beam and the right main beam, and the push cylinders control the movement of the transport unit and the continuous miner, the shovel plate is arranged at one end of the front end head close to the mining tunnel, the front stepping mechanism and the rear stepping mechanism are respectively arranged at the bottom of the front end head and the rear end head, driving parts are provided inside the front stepping mechanism and the rear stepping mechanism, and a guide rail is provided between the front stepping mechanism and the rear stepping mechanism located on the same side, the front stepping mechanism and the rear stepping mechanism move along the guide rail driven by the driving part, and the transport trough is arranged between the left main beam and the right main beam for transferring materials to the unloading mechanism.

[0008] Optionally, the unloading mechanism includes a platform unloading part, a slewing bearing, a rotating motor, a tilted unloading part, a lifting cylinder, a connecting frame and an elevated beam, the platform unloading part is connected to the tilted unloading part, the inner ring of the slewing bearing is arranged on the rear end head, the outer ring of the slewing bearing is connected to the platform unloading part, the rotating motor is arranged on one side of the rear end head, and the rotating motor is suitable for driving the slewing bearing to rotate so as to drive the platform unloading part to rotate, the elevated beam is connected to both sides of the platform unloading part close to one end of the tilted unloading part, one end of the lifting cylinder is hingedly connected to the top of the elevated beam, and the other end is connected to one end of the connecting frame, and the other end of the connecting frame is connected to the tilted unloading part, and the lifting cylinder is telescoped to drive the tilted unloading part to rotate on the vertical and horizontal planes.

[0009] Optionally, the protection mechanism includes primary protection, a four-linkage, a protection cylinder and secondary protection. The secondary protection is hingedly connected to one end of the upper platform assembly close to the mining tunnel. The primary protection is connected to the secondary protection through the four-linkage and the protection cylinder, and the protection cylinder can drive the primary protection to expand or retract to the bottom of the secondary protection.

[0010] Optionally, the dust removal mechanism includes a dust collector, a negative pressure flexible air duct and an air duct telescopic arm, the air duct telescopic arm is movably arranged at the bottom of the protective mechanism, the dust collector is arranged in the upper platform assembly, the air outlet of the dust collector is connected to the air supply mechanism, the air inlet of the dust collector is connected to one end of the negative pressure flexible air duct, the other end of the negative pressure flexible air duct is connected to the air duct telescopic arm, and is driven by the air duct telescopic arm to perform telescopic movement along the excavation direction.

[0011] Optionally, the air supply mechanism includes an air supply fan, a positive pressure flexible air duct and an air duct retraction device, the air supply fan is arranged in the upper platform assembly, the air inlet of the air supply fan is connected to the air outlet of the dust collector, the air outlet of the air supply fan is connected to one end of the positive pressure flexible air duct, the air duct retraction device is arranged at the bottom of the upper platform assembly, the other end of the positive pressure flexible air duct is connected to the transport unit, and the positive pressure flexible air duct is arranged in the air duct retraction device, the positive pressure flexible air duct moves along the excavation direction driven by the long-distance transport unit, and the positive pressure flexible air duct moves away from the excavation direction driven by the air duct retraction device.

[0012] Compared with the prior art, the technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0013] An embodiment of the present invention provides a step-by-step walking platform for open-pit sidewall mining, which realizes the protection, dust removal and ventilation functions by integrating a protection mechanism, a dust removal mechanism and an air supply mechanism on the upper platform assembly, and realizes the function of transferring materials on the walking platform by connecting the unloading mechanism on the lower platform assembly. The walking platform has a compact structure and is easy to operate. It meets the process requirements of dust removal and unloading in open-pit mines, the protection requirements of the platform, and the working requirements under various working conditions, thereby realizing the green mining of sidewall compressed coal and ensuring the rationality and practicality of the entire platform structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 It is a structural schematic diagram of a step-by-step walking platform for open-pit sidewall mining according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the deployment of the first-level protection according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the first-level protection retraction according to an embodiment of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the upper platform assembly according to an embodiment of the present invention;

[0020] Figure 5It is a structural schematic diagram of the lower platform assembly according to an embodiment of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the unloading mechanism described in an embodiment of the present invention.

[0022] Among them, 1. Protection mechanism; 1.1. First-level protection; 1.2. Four-link; 1.3. Protection cylinder; 1.4. Second-level protection; 2. Upper platform assembly; 2.1. First platform unit; 2.2. Second platform unit; 2.3. Third platform unit; 2.4. Fourth platform unit; 2.5. Fifth platform unit; 2.6. Sixth platform unit; 3. Dust removal mechanism; 3.1. Dust collector; 3.2. Negative pressure flexible air duct; 3.3. Air duct telescopic arm; 4. Lower platform assembly; 4.1. Shovel board; 4.2. Front end; 4.3. Front stepping mechanism; 4.4. Right main beam; 4.5. Middle transport trough; 4.6, left main beam; 4.7, rear end head; 4.8, rear stepping mechanism; 4.9, tail transport trough; 5, air supply mechanism; 5.1, air supply fan; 5.2, positive pressure flexible air duct; 5.3, air duct retraction device; 6, unloading mechanism; 6.1, platform unloading part; 6.2, slewing bearing; 6.3, rotating motor; 6.4, tilting unloading part; 6.5, lifting cylinder; 6.6, connecting frame; 6.7, elevated beam; 7, first cable drum; 8, second cable drum; 9, water hose drum; 10, hydraulic pump station; 11, electrical system; 12, inverter. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figures 1 to 6As shown, the present embodiment provides a step-by-step walking platform for open-pit sidewall mining, comprising a protective mechanism 1, an upper platform assembly 2, a dust removal mechanism 3, a lower platform assembly 4, an air supply mechanism 5 and a discharge mechanism 6. The upper platform assembly 2 is connected to the lower platform assembly 4 to form a whole, the protective mechanism 1, the dust removal mechanism 3 and the air supply mechanism 5 are all arranged on the upper platform assembly 2, the protective mechanism 1 is arranged at one end of the upper platform assembly 2 close to the mining tunnel, the dust removal mechanism 3 and the air supply mechanism 5 are connected, and the discharge mechanism 6 is arranged at one end of the lower platform assembly 4 away from the mining tunnel. Specifically, the upper platform assembly 2 and the lower platform assembly 4 are connected by bolts to form the main structure of the walking platform. By integrating the protection mechanism 1, the dust removal mechanism 3 and the air supply mechanism 5 on the upper platform assembly 2, the protection, dust removal and ventilation functions are realized. By connecting the unloading mechanism 6 on the lower platform assembly 4, the function of transporting materials is realized on the walking platform. This walking platform has a compact structure and is easy to operate. It meets the process requirements of dust removal and unloading in open-pit mines, the protection requirements of the platform, and the working requirements under various working conditions, realizes the green mining of side-wall pressed coal, and ensures the rationality and practicality of the entire platform structure.

[0026] The walking platform provided in this embodiment is used for sidewall mining, and a continuous miner is used for excavation. The continuous miner is connected to a transport unit, and the transport unit is connected to the walking platform to realize sidewall mining.

[0027] Further, see Figure 4 As shown, the upper platform assembly 2 includes a first platform unit 2.1, a second platform unit 2.2, a third platform unit 2.3, a fourth platform unit 2.4, a fifth platform unit 2.5 and a sixth platform unit 2.6 connected in sequence, a first cable drum 7 is arranged on the first platform unit 2.1, a second cable drum 8 is arranged on the second platform unit 2.2, a water hose drum 9 is arranged on the third platform unit 2.3, a hydraulic pump station 10 is arranged on the fourth platform unit 2.4, an electrical system 11 is arranged on the fifth platform unit 2.5, and a frequency converter 12 is arranged on the sixth platform unit 2.6. Specifically, the first cable drum 7 is used to store the continuous mining machine travel cable, the second cable drum 8 is used to store the transport unit running cable, the water hose drum 9 is used to retract and release the cooling water pipe of the liquid cooling system, the hydraulic pump station 10 is used as the power source of the entire travel platform, the electrical system 2.6 is used to control the opening and closing actions of the electrical components in the entire travel platform, and the frequency converter 12 is used to control the air volume of the air supply fan 5.1.

[0028] Reference Figure 5As shown, the lower platform assembly 4 includes a shovel plate 4.1, a front head 4.2, a front stepping mechanism 4.3, a right main beam 4.4, a transport trough, a left main beam 4.6, a rear head 4.7 and a rear stepping mechanism 4.8. The front head 4.2 is connected to the rear head 4.7 as a whole through the left main beam 4.6 and the right main beam 4.4. Push cylinders are arranged inside the left main beam 4.6 and the right main beam 4.4. The push cylinders control the movement of the transport unit and the continuous miner. The shovel plate 4.1 is arranged at one end of the front head 4.2 close to the mining tunnel. The front stepping mechanism 4.3 and the rear stepping mechanism 4.8 are respectively arranged at the bottom of the front end head 4.2 and the rear end head 4.7. The front stepping mechanism 4.3 and the rear stepping mechanism 4.8 are both provided with driving parts inside, and a guide rail is provided between the front stepping mechanism 4.3 and the rear stepping mechanism 4.8 located on the same side. The front stepping mechanism 4.3 and the rear stepping mechanism 4.8 move along the guide rail under the drive of the driving part, and the transport trough is provided between the left main beam 4.6 and the right main beam 4.4, and is used to transport materials to the unloading mechanism 6. Specifically, the left main beam 4.6 and the right main beam 4.4 are arranged in parallel, and a push cylinder is arranged inside the left main beam 4.6 and the right main beam 4.4, and the cylinder rod of the push cylinder is telescopically moved along the excavation direction, and the push cylinder cooperates with the traction force of the continuous mining machine to work together, thereby controlling the advancement and retreat of the continuous mining machine and the transport unit. The front end head 4.2 and the rear end head 4.7 are respectively arranged at the two ends of the left main beam 4.6 and the right main beam 4.4, so that the front end head 4.2, the right main beam 4.4, the rear end head 4.7 and the left main beam 4.6 are connected in sequence, thereby The main structure of the lower platform assembly 4 is formed, and the shovel plate 4.1 is arranged at the front end of the lower platform assembly 4, which is convenient for the mining equipment and the transport unit to go downhill smoothly into the cave. The front stepping mechanism 4.3 and the rear stepping mechanism 4.8 can move along the guide rail through their internal driving parts, so that the overall walking platform can move to the next mining tunnel. The transport trough includes a middle transport trough 4.5 and a rear transport trough 4.9. The middle transport trough 4.5 and the rear transport trough 4.9 are both arranged in the middle of the lower platform assembly 4, and are used to transfer the materials transported by the transport unit to the unloading mechanism 6.

[0029] Reference Figure 6As shown, the unloading mechanism 6 comprises a platform unloading part 6.1, a slewing bearing 6.2, a rotating motor 6.3, a tilting unloading part 6.4, a lifting cylinder 6.5, a connecting frame 6.6 and an elevated beam 6.7, the platform unloading part 6.1 is connected to the tilting unloading part 6.4, the inner ring of the slewing bearing 6.2 is arranged on the rear end head 4.7, the outer ring of the slewing bearing 6.2 is connected to the platform unloading part 6.1, the rotating motor 6.3 is arranged on one side of the rear end head 4.7, and the rotating motor 6.6 is connected to the platform unloading part 6.1. 3 is suitable for driving the slewing bearing 6.2 to rotate, so as to drive the platform unloading part 6.1 to rotate. The elevated beam 6.7 is connected to both sides of one end of the platform unloading part 6.1 close to the inclined unloading part 6.4. One end of the lifting cylinder 6.5 is hingedly connected to the top of the elevated beam 6.7, and the other end is connected to one end of the connecting frame 6.6. The other end of the connecting frame 6.6 is connected to the inclined unloading part 6.4. The lifting cylinder 6.5 is telescopic to drive the inclined unloading part 6.4 to rotate on the vertical and horizontal planes. Specifically, the platform unloading part 6.1 is connected with the inclined unloading part 6.4 to form continuous unloading, and the discharge port of the tail transport trough 4.9 is arranged corresponding to the platform unloading part 6.1, so that the materials passing through the middle transport trough 4.5 and the tail transport trough 4.9 are transported and unloaded through the platform unloading part 6.1 and the inclined unloading part 6.4, and the bottom of the platform unloading part 6.1 is connected with the slewing bearing 6.2, and the outer periphery of the slewing bearing 6.2 and the outer periphery of the rotary motor 6.3 are both provided with meshing gears, so that the slewing bearing 6.2 can be driven to rotate by starting the rotary motor 6.3. The platform unloading part 6.1 is moved, thereby driving the platform unloading part 6.1 to rotate in the horizontal plane. The maximum rotation angle of the platform unloading part 6.1 is 180°. The lifting cylinder 6.5 is started to telescope, driving the connecting frame 6.6 to move, changing the distance from the end of the connecting frame 6.6 to the elevated beam 6.7, thereby changing the distance from the end of the inclined unloading part 6.4 away from the platform unloading part 6.1 to the elevated beam 6.7, that is, changing the unloading height, so that the inclined unloading part 6.4 can rotate in the vertical plane around the connection point between the inclined unloading part 6.4 and the platform unloading part 6.1.

[0030] Reference Figure 2 and Figure 3 As shown, the protection mechanism 1 includes a primary protection 1.1, a four-link 1.2, a protection cylinder 1.3 and a secondary protection 1.4. The secondary protection 1.4 is hingedly connected to one end of the upper platform assembly 2 close to the mining tunnel. The primary protection 1.1 is connected to the secondary protection 1.4 through the four-link 1.2 and the protection cylinder 1.3. One end of the protection cylinder 1.3 is hingedly connected to the bottom of the secondary protection 1.4, and the other end is connected to the four-link 1.2. The four-link 1.2 is hingedly arranged at the connection between the primary protection 1.1 and the secondary protection 1.4, and the protection cylinder 1.3 can drive the primary protection 1.1 to expand or retract to the bottom of the secondary protection 1.4.

[0031] Reference Figure 1As shown, the dust removal mechanism 3 includes a dust collector 3.1, a negative pressure flexible wind tube 3.2 and a wind tube telescopic arm 3.3. The wind tube telescopic arm 3.3 is movably arranged at the bottom of the protective mechanism 1. The dust collector 3.1 is arranged in the upper platform assembly 2. The air outlet of the dust collector 3.1 is connected to the air supply mechanism 5. The air inlet of the dust collector 3.1 is connected to one end of the negative pressure flexible wind tube 3.2. The other end of the negative pressure flexible wind tube 3.2 is connected to the wind tube telescopic arm 3.3, and is driven by the wind tube telescopic arm 3.3 to perform telescopic movement along the excavation direction, that is, the negative pressure flexible wind tube 3.2 can be extended into the tunnel entrance or retracted under the drive of the wind tube telescopic arm 3.3, so that the polluted air flow in the mining tunnel can enter the dust collector 3.1 through the negative pressure flexible wind tube 3.2 for dust removal, and the air flow after dust removal flows into the air supply mechanism 5.

[0032] Continue to refer to Figure 1 As shown, the air supply mechanism 5 includes an air supply fan 5.1, a positive pressure flexible air duct 5.2 and an air duct retracting device 5.3. The air supply fan 5.1 is arranged in the upper platform assembly 2. The air inlet of the air supply fan 5.1 is connected to the air outlet of the dust collector 3.1. The air outlet of the air supply fan 5.1 is connected to one end of the positive pressure flexible air duct 5.2. The air duct retracting device 5.3 is arranged at the bottom of the upper platform assembly 2. The other end of the positive pressure flexible air duct 5.2 is connected to the transport unit. The cylinder 5.2 is arranged in the wind cylinder retracting device 5.3. The positive pressure flexible wind cylinder 5.2 moves along the excavation direction under the drive of the remote transmission unit to ensure that fresh air can be delivered to the head through the air supply fan 5.1, and the wind flow after dust removal can be delivered to the head to ensure the ventilation effect in the entire mining tunnel. The positive pressure flexible wind cylinder 5.2 moves away from the excavation direction under the drive of the wind cylinder retracting device 5.3, thereby retracting the positive pressure flexible wind cylinder 5.2 to avoid affecting the movement of the entire walking platform.

[0033] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A step-by-step walking platform for open-pit sidewall mining, characterized in that: The utility model comprises a protective mechanism (1), an upper platform assembly (2), a dust removal mechanism (3), a lower platform assembly (4), an air supply mechanism (5) and a discharge mechanism (6); the upper platform assembly (2) is connected to the lower platform assembly (4) to form a whole; the protective mechanism (1), the dust removal mechanism (3) and the air supply mechanism (5) are all arranged on the upper platform assembly (2); the protective mechanism (1) is arranged at one end of the upper platform assembly (2) close to the mining tunnel; the dust removal mechanism (3) and the air supply mechanism (5) are connected; and the discharge mechanism (6) is arranged at one end of the lower platform assembly (4) away from the mining tunnel.

2. The open-pit sidewall mining step-by-step walking platform according to claim 1 is characterized in that: The upper platform assembly (2) comprises a first platform unit (2.1), a second platform unit (2.2), a third platform unit (2.3), a fourth platform unit (2.4), a fifth platform unit (2.5) and a sixth platform unit (2.6) which are connected in sequence; a first cable drum (7) is arranged on the first platform unit (2.1), a second cable drum (8) is arranged on the second platform unit (2.2), a water hose drum (9) is arranged on the third platform unit (2.3), a hydraulic pump station (10) is arranged on the fourth platform unit (2.4), an electrical system (11) is arranged on the fifth platform unit (2.5), and a frequency converter (12) is arranged on the sixth platform unit (2.6).

3. The open-pit sidewall mining step-by-step walking platform according to claim 1 is characterized in that: The lower platform assembly (4) comprises a shovel plate (4.1), a front end head (4.2), a front stepping mechanism (4.3), a right main beam (4.4), a transport trough, a left main beam (4.6), a rear end head (4.7) and a rear stepping mechanism (4.8). The front end head (4.2) is connected to the rear end head (4.7) as a whole through the left main beam (4.6) and the right main beam (4.4). Push cylinders are arranged inside the left main beam (4.6) and the right main beam (4.4). The push cylinders control the movement of the transport unit and the continuous miner. The shovel plate (4.1) is arranged at one end of the front end head (4.2) close to the mining tunnel. The front stepping mechanism (4.8) is arranged at one end of the front end head (4.2) close to the mining tunnel. The stepping mechanism (4.3) and the rear stepping mechanism (4.8) are respectively arranged at the bottom of the front end head (4.2) and the rear end head (4.7); a driving member is arranged inside the front stepping mechanism (4.3) and the rear stepping mechanism (4.8); a guide rail is arranged between the front stepping mechanism (4.3) and the rear stepping mechanism (4.8) located on the same side; the front stepping mechanism (4.3) and the rear stepping mechanism (4.8) move along the guide rail under the drive of the driving member; the transport trough is arranged between the left main beam (4.6) and the right main beam (4.4) and is used to transport materials to the unloading mechanism (6).

4. The step-by-step walking platform for open-pit sidewall mining according to claim 3 is characterized in that: The unloading mechanism (6) comprises a platform unloading part (6.1), a slewing bearing (6.2), a rotating motor (6.3), an inclined unloading part (6.4), a lifting cylinder (6.5), a connecting frame (6.6) and an elevated beam (6.7); the platform unloading part (6.1) is connected to the inclined unloading part (6.4); the inner ring of the slewing bearing (6.2) is arranged on the rear end head (4.7); the outer ring of the slewing bearing (6.2) is connected to the platform unloading part (6.1); the rotating motor (6.3) is arranged on one side of the rear end head (4.7); and the rotating motor (6.6) is connected to the rear end head (4.7). .3) is suitable for driving the slewing bearing (6.2) to rotate, so as to drive the platform unloading part (6.1) to rotate. The elevated beam (6.7) is connected to both sides of the platform unloading part (6.1) near one end of the inclined unloading part (6.4). One end of the lifting cylinder (6.5) is hingedly connected to the top of the elevated beam (6.7), and the other end is connected to one end of the connecting frame (6.6). The other end of the connecting frame (6.6) is connected to the inclined unloading part (6.4). The lifting cylinder (6.5) is telescopic to drive the inclined unloading part (6.4) to rotate on the vertical and horizontal planes.

5. The open-pit sidewall mining step-by-step walking platform according to claim 1 is characterized in that: The protection mechanism (1) comprises a primary protection (1.1), a four-linkage (1.2), a protection cylinder (1.3) and a secondary protection (1.4); the secondary protection (1.4) is hingedly connected to one end of the upper platform assembly (2) close to the mining tunnel; the primary protection (1.1) is connected to the secondary protection (1.4) via the four-linkage (1.2) and the protection cylinder (1.3); and the protection cylinder (1.3) can drive the primary protection (1.1) to expand or retract to the bottom of the secondary protection (1.4).

6. The open-pit sidewall mining step-by-step walking platform according to claim 1 is characterized in that: The dust removal mechanism (3) comprises a dust collector (3.1), a negative pressure flexible wind tube (3.2) and a wind tube telescopic arm (3.3); the wind tube telescopic arm (3.3) is movably arranged at the bottom of the protective mechanism (1); the dust collector (3.1) is arranged in the upper platform assembly (2); the air outlet of the dust collector (3.1) is connected to the air supply mechanism (5); the air inlet of the dust collector (3.1) is connected to one end of the negative pressure flexible wind tube (3.2); the other end of the negative pressure flexible wind tube (3.2) is connected to the wind tube telescopic arm (3.3), and is driven by the wind tube telescopic arm (3.3) to perform telescopic movement along the excavation direction.

7. The open-pit sidewall mining step-by-step walking platform according to claim 6 is characterized in that: The air supply mechanism (5) comprises an air supply fan (5.1), a positive pressure flexible wind tube (5.2) and a wind tube retracting device (5.3). The air supply fan (5.1) is arranged in the upper platform assembly (2). The air inlet of the air supply fan (5.1) is connected to the air outlet of the dust collector (3.1). The air outlet of the air supply fan (5.1) is connected to one end of the positive pressure flexible wind tube (5.2). The wind tube retracting device (5.3) is arranged at the bottom of the upper platform assembly (2). The other end of the positive pressure flexible wind tube (5.2) is connected to the transport unit, and the positive pressure flexible wind tube (5.2) is arranged in the wind tube retracting device (5.3). The positive pressure flexible wind tube (5.2) moves along the excavation direction under the drive of the remote transport unit, and the positive pressure flexible wind tube (5.2) moves away from the excavation direction under the drive of the wind tube retracting device (5.3).

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