Mechanized mining system and method for flexible shielding support of steeply inclined coal seams

Abstract

The present invention discloses a mechanized mining system and method for a steeply inclined coal seam with a flexible shield support, wherein the mechanized mining system for a steeply inclined coal seam with a flexible shield support comprises a working face transport lane, a working face return air lane and a coal mining working face; an integral flexible shield support and a coal mining mechanism are provided in the coal mining working face; a support disassembly station for disassembling a flexible shield support unit is provided in the working face transport lane, and a support assembly station for assembling a flexible shield support unit is provided in the working face return air lane. The present invention also relates to a mechanized mining method for a steeply inclined coal seam with a flexible shield support, comprising the steps of lane system layout, working face support, coal dropping and transportation at the working face, and frame shifting support, which are performed in a sequential cycle. The present invention has a reasonable design, low investment and convenient construction, can effectively solve the problem of the difficulty of mechanized mining of steeply inclined coal seams, can realize mechanized, automated, unmanned and intelligent mining, and is suitable for complex and difficult-to-mine coal seams with large inclination angles.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining, and in particular relates to a mechanized mining system and method for a steeply inclined coal seam with a flexible shielding support. Background Art

[0002] Steeply inclined coal seams refer to coal seams with an inclination angle greater than 45°, accounting for about 10-20% of my country's proven coal reserves, and most of them are high-quality or scarce resources. Due to their large inclination angle, the instability increases, making mining more difficult. Therefore, how to mine steeply inclined coal seams safely and efficiently is one of the important issues that need to be solved in the development of many mining areas.

[0003] At present, in order to improve the safety production conditions of the coal mining face and ensure the stability of the floor and roof system of the coal mining face, the coal mining face in the steeply inclined coal seam is generally arranged in a pseudo-inclined manner, and in the relevant technology, the flexible shield support coal mining method is often used to mine the steeply inclined coal seam. The flexible shield support coal mining method is a non-mechanized coal mining method for steeply inclined coal seams that was first experimentally used in the Huainan mining area of ​​my country in the 1950s and 1960s. This method uses steel wire ropes to connect mining I-beams to form a flexible support, which is laid along the entire length of the coal mining face; the coal is dropped from the coal mining face by the "manual + blasting" method, that is, the coal seam is loosened by blasting, and then the staff enters the flexible shield support to mine the coal, and the coal is slid to the working face transportation lane through the enamel (iron sheet) chute.

[0004] The above-mentioned method of coal mining face support system is stable, easy to operate and requires low investment, but it requires manual mining, has a harsh working environment, great safety hazards, and low mining efficiency. This method can no longer meet the current requirements for the comprehensive production efficiency of coal mining.

[0005] On the other hand, when using the flexible shielding support mining method for coal mining, as the coal mining face continues to advance, the flexible shielding support will not only move toward the coal wall under the pressure of the goaf, but also move down along the coal mining face under its own gravity, resulting in more flexible shielding supports at the lower end of the coal mining face, while the upper end of the coal mining face will have fewer flexible shielding supports. In order to ensure that the support range of the flexible shielding support can meet the needs of the coal mining face, workers are often required to transfer and install the flexible shielding support at the lower end to the upper end of the coal mining face. The support transfer process is complicated and cumbersome, which greatly increases the labor intensity of the workers and seriously affects the mining efficiency of steeply inclined coal seams. Summary of the invention

[0006] In order to solve the above deficiencies in the prior art, the present invention aims to provide a mechanized mining system and method for steeply inclined coal seams with flexible protective supports, so as to ensure safe production in mines, improve the working environment of workers and enhance the comprehensive production efficiency of coal mining.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a mechanized mining system with flexible shielding supports for steeply inclined coal seams, comprising a working face transport lane and a working face return air lane arranged parallel to the direction of the coal seam, and a coal mining working face arranged obliquely in the coal seam; wherein an integral flexible shielding support is laid in the coal mining working face, and a coal mining mechanism is arranged in the area formed by the integral flexible shielding support, and the coal mining mechanism includes a walking part matched with the integral flexible shielding support, and a cutting part whose rotation direction is perpendicular to the coal wall; a support disassembly station for disassembling a flexible shielding support unit is provided at the end where the working face transport lane is connected to the coal mining working face, and a support assembly station for assembling a flexible shielding support unit is provided at the end where the working face return air lane is connected to the coal mining working face.

[0008] As a limitation of the present invention, it also includes an uphill tunnel for transporting the flexible shielding support unit from the working face transport tunnel to the working face return air tunnel; the uphill tunnel is arranged in front of the coal mining working face.

[0009] As another limitation of the present invention, the flexible shielding support body comprises a top beam, a shielding beam and a bottom beam which are hinged together in sequence; wherein an active telescopic support column is provided between the top beam and the bottom beam.

[0010] As a further limitation of the present invention, an assembled flexible rack is provided on the bottom beam of the flexible shielding support unit; a gear track device adapted to the assembled flexible rack is provided on the side of the coal mining mechanism where the walking part contacts the bottom beam of the flexible shielding support unit, and a crawler device is provided on the side where the walking part contacts the top beam of the flexible shielding support unit.

[0011] As a further limitation of the present invention, it also includes a traction mechanism for ensuring stable movement of the coal mining mechanism; the traction mechanism includes a traveling winch arranged in the return air lane of the working face, and a steel strand arranged in the coal mining working face and connected to the traveling winch.

[0012] As another limitation of the present invention, an enamel chute is further provided in the bottom beam of the flexible shielding support unit, and the enamel chute is fixedly connected to the bottom beam of the flexible shielding support unit through a hydraulic mechanism.

[0013] The present invention also discloses a mechanized mining method for a steeply inclined coal seam with a flexible shield support, which uses the above-mentioned mechanized mining system for a steeply inclined coal seam with a flexible shield support, and comprises the following steps performed in sequence:

[0014] S1. The coal mining face is arranged in a pseudo-inclined manner in the coal seam. In front of the coal mining face, an uphill tunnel is excavated along the inclination direction of the coal seam, and the working face transport lane and the working face return air lane are excavated along the direction of the coal seam; among them, the working face transport lane is located at the lower end of the coal mining face and a support disassembly station is installed inside, and the working face return air lane is located at the upper end of the coal mining face and a support assembly station is installed inside;

[0015] S2. Coal mining face support: multiple flexible shielding support monomers are laid on the goaf side of the coal mining face, and connected with steel wire ropes or round link chains to form an overall flexible shielding support; a coal mining mechanism is installed in the area formed by the overall flexible shielding support, wherein the walking part of the coal mining mechanism cooperates with the overall flexible shielding support, and the cutting part of the coal mining mechanism is in close contact with the coal wall;

[0016] S3, coal dropping and transportation at the coal mining face: the coal mining mechanism, driven by the walking unit, cuts coal upward along the coal mining face and cleans coal downward along the coal mining face. The mined coal is transported from the transport lane of the working face to the outside;

[0017] S4, support by frame shifting: After the single cycle of upward coal cutting and downward coal cleaning of the coal mining mechanism is completed, the overall flexible shielding support automatically moves toward the coal wall and descends in height; at the same time, the support disassembly station removes the redundant flexible shielding support monomers at the lower end of the coal mining working face, and transports them to the support assembly station through the working face transport lane, uphill lane, and working face return air lane in turn, and then the flexible shielding support monomers are assembled at the upper end of the coal mining working face through the support assembly station, thus completing a cycle;

[0018] S5. Repeat steps S3 and S4 to advance the coal mining face continuously along the direction of the coal seam until all coal in the coal area is mined.

[0019] As a limitation of the present invention, in step S4, when it is determined that the distance between the coal mining face and the uphill tunnel is too large, a spare tunnel for transporting flexible shielding support units is excavated between the coal mining face and the uphill tunnel, and the spare tunnel is parallel to the coal mining face.

[0020] As another limitation of the present invention, in step S3, the coal in the coal mining face is transported by self-sliding means. As the coal mining mechanism moves upward to cut coal, the enamel chute is laid behind the coal mining mechanism driven by the hydraulic mechanism. As the coal mining mechanism continuously moves downward to clean coal, the enamel chute is retracted ahead of the coal mining mechanism driven by the hydraulic mechanism.

[0021] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0022] (1) In the coal mining system disclosed in the present invention, the coal mining mechanism is used to realize the mechanized mining of steeply inclined coal seams, effectively solving the problem of large safety hazards and low mining efficiency of the "manual + blasting" coal mining method; and by setting a support disassembly station in the working face transport lane and a support assembly station in the working face return air lane, the flexible shielding support unit can be disassembled at the lower end of the coal mining working face and installed at the upper end of the coal mining working face independently, which is easy to realize the mechanization and automation of the support, ensuring that the support range of the overall flexible shielding support can always meet the needs of the coal mining working face during the advancement of the coal mining working face. The mining system has a simple layout and is easy to realize the mechanization and automation of coal mining operations. It can improve the working environment of workers, reduce the labor intensity of workers, and ensure the comprehensive efficiency of coal mining.

[0023] (2) In the coal mining system disclosed in the present invention, the rotation direction of the cutting part of the coal mining mechanism is changed from the traditional direction parallel to the coal wall to the direction perpendicular to the coal wall. The cutting part can fully contact the coal wall, thereby improving the coal mining efficiency and reducing the running resistance of the loose coal seam to the cutting part.

[0024] (3) In the coal mining system disclosed in the present invention, an active telescopic support is provided between the bottom beam and the top beam of the flexible shielding support unit. On the one hand, it can improve the bearing pressure capacity of the flexible shielding support unit, and on the other hand, it is also convenient to adjust the height of the flexible shielding support unit, thereby ensuring that the flexible shielding support unit provides good support for the coal mining working face.

[0025] (4) In the coal mining system disclosed in the present invention, the flexible shielding support unit can be quickly transported from the working face transport lane to the working face return air lane through the uphill lane, thereby realizing the recycling of the flexible shielding support unit, ensuring the safe and efficient circulation advancement of the coal mining working face while reducing the production cost.

[0026] (5) In the coal mining system disclosed in the present invention, the walking part of the coal mining mechanism includes a crawler device and a gear track device. The crawler device provides walking power for the coal mining mechanism, and the gear track device is installed on the assembled flexible gear in the single bottom beam of the flexible shielding support, which forms a guiding effect on the coal mining mechanism and can effectively ensure the safe and stable operation of the coal mining mechanism.

[0027] (6) The traction mechanism provided in the coal mining system disclosed in the present invention can, on the one hand, assist the crawler device in providing a certain amount of walking power for the coal mining mechanism, and on the other hand, assist the gear track device in guiding the coal mining mechanism to prevent the coal mining mechanism from moving downward toward the coal wall during the coal mining process, thereby effectively improving the safety of the coal mining working face.

[0028] (7) In the coal mining system disclosed in the present invention, the retractable enamel chute provided on the bottom beam of the flexible shield support unit can realize the self-sliding transportation of coal in the coal mining face without affecting the movement of the flexible shield support unit and preventing the cutting part in the coal mining mechanism from causing damage to the enamel chute.

[0029] (8) The coal mining method disclosed in the present invention is a practical application of the coal mining system in the present invention. It has a simple recovery process, high mining efficiency, and simple mining and excavation succession. It can fully realize unmanned mining and is suitable for coal seams with an inclination angle greater than 35°. It can effectively solve the problem of the difficulty of mechanized mining of steeply inclined coal seams.

[0030] (9) When arranging the tunnel system, the present invention will selectively arrange spare tunnels. When the distance between the coal mining face and the uphill tunnel is greater than 1,500 meters, the spare tunnel can be used as a dedicated tunnel for transporting flexible shielding bracket units, so as to appropriately reduce the transportation distance of the flexible shielding bracket units, ensure the rapid transportation and assembly of the flexible shielding bracket units, and then efficiently supplement the effective support range of the overall flexible shielding bracket when the support is moved.

[0031] To sum up, the present invention has reasonable design, simple technology and convenient construction. It can effectively solve the problem of difficulty in mechanized mining of steeply inclined coal seams, greatly reduce equipment investment, and can realize mechanized, automated and unmanned intelligent mining. It is suitable for complex and difficult to mine coal seams with large inclination angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Figure 1 This is a plan view of embodiment 1 of the present invention;

[0034] Figure 2 It is a cross-sectional view of the coal mining working face in Example 1 of the present invention;

[0035] Figure 3 This is a schematic structural diagram of a flexible shielding support unit in Example 1 of the present invention;

[0036] Figure 4 This is a structural front view of the coal mining mechanism in Example 1 of the present invention;

[0037] Figure 5 It is a structural side view of the coal mining mechanism in Example 1 of the present invention;

[0038] Figure 6 This is a schematic structural diagram of an assembled flexible gear in Example 1 of the present invention;

[0039] In the figure: 1. Working face transport lane; 2. Working face return air lane; 3. Coal mining working face; 4. Uphill lane; 5. Spare lane; 6. Integral flexible shielding support; 7. Top beam; 8. Shielding beam; 9. Bottom beam; 10. Active telescopic support; 11. Coal mining mechanism; 12. Traveling part; 13. Cutting part; 14. Traveling winch; 15. Steel strand; 16. Support disassembly station; 17. Support assembly station; 18. Enamel chute; 19. Hydraulic mechanism; 20. Track device; 21. Gear track device. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0041] Example 1 A mechanized mining system for a steeply inclined coal seam with flexible shielding support

[0042] This embodiment is mainly applicable to coal seams with an inclination angle greater than 45°. It has a simple layout and can realize unmanned mining, and can effectively solve the problem of difficulty in mechanized mining of steeply inclined coal seams.

[0043] like Figure 1 As shown, this embodiment includes a working face transport tunnel 1 and a working face return air tunnel 2 arranged in parallel along the direction of the coal seam, and a coal mining working face 3 arranged in a vertical pseudo-inclined manner in the coal seam and connected to the working face transport tunnel 1 and the working face return air tunnel 2. Among them, the working face transport tunnel 1 is located at the lowest end of the coal mining working face 3 and extends to the boundary of the coal mining area. A track is laid inside to transport the mined coal to the outside; the working face return air tunnel 2 is located at the uppermost end of the coal mining working face 3 and extends to the boundary of the coal mining area. A ventilation fan is provided inside to mainly provide fresh air flow inside the mine. Because this embodiment is mainly aimed at the mining of steeply inclined coal seams, when digging the working face transport tunnel 1 and the working face return air tunnel 2, the working face return air tunnel 2 is generally ahead of the working face transport tunnel 1 by a certain distance.

[0044] More specifically, an integral flexible shielding support 6 is laid in the coal mining face 3 to form a support structure for the goaf. In this embodiment, the integral flexible shielding support 6 is formed by connecting a plurality of flexible shielding support monomers with steel wire ropes or round link chains. Figure 3 As shown, each flexible shield support unit is made of mining I-beam or special steel, and has a polygonal structure, including a top beam 7, a shield beam 8 and a bottom beam 9 that are hinged in sequence. Among them, an active telescopic support 10 for bearing the squeezing force of the goaf is also arranged between the top beam 7 and the bottom beam 9. In this embodiment, the active telescopic support 10 is a hydraulic telescopic cylinder.

[0045] In the coal mining face 3, a coal mining mechanism 11 is arranged in the area formed by the integral flexible shield support 6. Figure 4 and Figure 5 As shown, the coal mining mechanism 11 includes a walking part 12 and a cutting part 13, wherein a gear track device 21 is provided on the walking part 12 near the flexible shield support single body bottom beam 9, and a crawler device 20 is provided on the walking part 12 near the flexible shield support single body top beam 7. More specifically, an assembled flexible rack that can be matched with the gear track device 21 is fixed on the flexible shield support single body bottom beam 9, so that when the coal mining mechanism 11 moves by relying on the crawler device 20, the assembled flexible rack can guide the coal mining mechanism 11, thereby ensuring the safe and stable operation of the coal mining mechanism 11. Figure 6 As shown, the assembled flexible gear is formed by connecting a plurality of racks via rack connecting pins.

[0046] The cutting part 13 in the coal mining mechanism 11 is connected to the rear of the walking part 12 through a transmission cantilever and is a rotating drum with a cutting blade. In order to make the cutting part 13 fully contact with the coal wall, in this embodiment, the rotation direction of the cutting part 13 is perpendicular to the coal wall direction.

[0047] In this embodiment, a traction mechanism is also provided to ensure the stable movement of the coal mining mechanism 11. Figure 1 As shown, the traction mechanism includes a traveling winch 14 provided in the return air lane 2 of the working face, and a steel strand 15 provided in the coal mining working face 3, wherein one end of the steel strand 15 is fixed to the traveling winch 14, and the other end is fixed to the traveling part 12 of the coal mining mechanism 11. During coal mining, the traction mechanism can not only provide traveling power for the coal mining mechanism 11, but also serve as a stabilizing device to prevent the coal mining mechanism 11 from moving downward to the coal wall side.

[0048] As the coal mining face 3 advances, the integral flexible shield support 6 moves toward the coal wall under the squeezing force of the rear goaf, and at the same time, it also moves downward along the inclination direction of the coal mining face 3 under the action of its own gravity. In order to ensure that the support range of the integral flexible shield support 6 can always meet the needs of the coal mining face, this embodiment uses the working face transport lane 1 and the working face return air lane 2 to form a support disassembly and transfer system. Figure 1 As shown, based on the working face transport lane 1 and the working face return air lane 2, the support disassembly and transfer system also includes a support disassembly station 16, a support assembly station 17 and an uphill lane 4.

[0049] Among them, the support disassembly station 16 is fixedly installed in the working face transport lane 1, located at the end where the working face transport lane 1 is connected to the coal mining working face 3, and is used to disassemble the flexible shielding support monomer at the lower end of the coal mining working face 3; the support assembly station 17 is fixedly installed in the working face return air lane 2, located at the end where the working face return air lane 2 is connected to the coal mining working face 3, and is used to assemble the flexible shielding support monomer removed from the support disassembly station 16. In this embodiment, the support disassembly station 16 and the support assembly station 17 are both manipulators used in the prior art for disassembling and assembling flexible shielding support monomers. The uphill lane 4 is located in front of the coal mining working face 3, and is paved with tracks for transporting the flexible shielding support monomers from the working face transport lane 1 to the working face return air lane 2.

[0050] In order to realize the self-sliding transportation of coal in the coal mining face, in this embodiment, a retractable enamel chute 18 is also provided in the bottom beam 9 of the flexible shield support unit. Figure 3 As shown, the enamel chute 18 is fixedly connected to the bottom beam 9 of the flexible shielding support unit through a hydraulic mechanism 19. In this embodiment, the hydraulic mechanism 19 is a hydraulic telescopic cylinder, under the action of the hydraulic telescopic cylinder, the enamel chute 18 can be extended or retracted from the bottom beam 9 of the flexible shielding support unit.

[0051] Example 2 A mechanized mining method for a steeply inclined coal seam with a flexible shield support

[0052] This embodiment uses the steeply inclined coal seam flexible shield support mechanized mining system in Example 1, and realizes mechanized, automated, and efficient coal mining operations on steeply inclined coal seams through a simple mining process. Specifically, the following steps are performed in sequence:

[0053] Step S1: Lane system layout

[0054] According to the actual distribution of coal seams, the working face transport tunnel 1 is excavated along the coal seam at the bottom until it extends to the boundary of the coal mining area; then, the working face return air tunnel 2 is excavated along the coal seam at the top until it extends to the boundary of the coal mining area, and according to the size of the pseudo-inclination angle of the coal seam, the working face return air tunnel 2 is arranged a certain distance ahead of the working face transport tunnel 1; then, the coal mining working face 3 is excavated pseudo-inclined in the coal seam until the working face transport tunnel 1 is connected with the working face return air tunnel 2; finally, in front of the coal mining working face 3, at the boundary of the coal mining area, an uphill tunnel 4 is excavated along the actual inclination direction of the coal seam until the working face transport tunnel 1 is connected with the working face return air tunnel 2.

[0055] The corresponding infrastructure is arranged in the working face transport lane 1, the working face return air lane 2 and the uphill lane 4, and an additional support disassembly station 16 is arranged in the working face transport lane 1, and an additional support assembly station 17 is arranged in the working face return air lane 2.

[0056] Step S2: Coal mining face support

[0057] A plurality of flexible shielding support monomers are laid on the goaf side of the coal mining face 3, and connected by steel wire ropes or round-link chains to form an integral flexible shielding support 6, thereby completing the safe support of the goaf area. Then, the coal mining mechanism 11 is installed in the area formed by the integral flexible shielding support 6, and it is ensured that: the crawler device 20 of the walking part 12 in the coal mining mechanism 11 is in contact with the top surface of the coal mining face 3; the gear rail device 21 of the walking part 12 in the coal mining mechanism 11 is matched with the assembled flexible gear rail in the flexible shielding support monomer on the bottom surface of the coal mining face 3; based on the upward coal mining of the coal mining mechanism 11, the cutting part 13 in the coal mining mechanism 11 is located behind the walking part 12 and is in close contact with the coal wall.

[0058] Step S3: coal dropping and coal transportation at the coal mining face

[0059] Coal falling: The coal mining mechanism 11, driven by the crawler device 20 in the walking part 12 and guided by the gear track device 21 in the walking part 12, goes up along the coal mining working face 3 to cut coal. When the coal mining mechanism 11 moves to the upper end of the coal mining working face 3, it continues to walk for a longer distance in the upper end tunnel to ensure that the cutting part 13 can complete the planing of the coal wall at this level; then the coal mining mechanism 11 goes down along the coal mining working face 3 to clean the coal. This is a feed cycle.

[0060] Coal transportation: This embodiment adopts a self-sliding transportation mode. As the coal mining mechanism 11 goes up to cut coal, the enamel chute 18 in the flexible shield support unit is automatically laid behind the coal mining mechanism 11 under the drive of the hydraulic mechanism 19 to form a chute structure to transport coal to the working face transport lane; and as the coal mining mechanism 11 continues to go down to clean coal, the enamel chute 18 mechanism is automatically retracted ahead of the coal mining mechanism 11 under the drive of the hydraulic mechanism 19. Finally, the coal that falls into the working face transport lane 1 is transported to the outside through the track.

[0061] Step S4: Scaffolding support

[0062] After the single cycle of upward coal cutting and downward coal cleaning of the coal mining mechanism 11 is completed, the overall flexible shielding support 6 moves toward the coal wall under the action of the squeezing force of the gangue in the goaf; at the same time, it slides down along the coal mining face 3 under the action of its own gravity. At this time, the support disassembly station 16 in the working face transport lane 1 disassembles the redundant flexible shielding support monomers at the lower end of the coal mining face 3; and transports them to the uphill lane 4 through the working face transport lane 1, and then transports them to the working face return air lane 2 through the uphill lane 4, and finally transports them to the support assembly station 17; finally, the flexible shielding support monomers are assembled at the upper end of the coal mining face 3 through the support assembly station 17, completing the supplement of the effective support range of the overall flexible shielding support 6. This cycle can be repeated to achieve the recycling of the flexible shielding support monomers.

[0063] When it is determined that the distance between the coal mining face 3 and the uphill roadway 4 is too large, and the transportation time of the disassembled flexible shield support monomer is too long, and it is not possible to efficiently supplement the effective support range of the overall flexible shield support 6, a spare roadway 5 for transporting the flexible shield support monomer is excavated between the coal mining face 3 and the uphill roadway 4 to achieve rapid transportation and installation of the flexible shield support monomer. It should be noted that in order to prevent the spare roadway 5 from affecting the normal advancement of the coal mining face, the spare roadway 5 excavated in this embodiment is parallel to the coal mining face 3.

[0064] At this point, the cyclic mining of the coal mining face is completed. After the overall flexible shielding support 6 moves into a cutting depth distance, it rises to the initial support state and is given a rated working resistance through the active telescopic support 10, so that it is in a stable state.

[0065] Step S5, repeating steps S3 and S4, so that the coal mining face is continuously advanced along the direction of the coal seam until all the coal in the coal area is mined.

[0066] It should be noted that when the tunnel system is arranged, a traction mechanism for ensuring the stable operation of the coal mining mechanism 11 can also be arranged in advance in the tunnel. Specifically, a traveling winch 14 is arranged in the return air tunnel 2 of the working face, and the traveling winch 14 is connected to the steel strand 15, and the steel strand 15 is extended to the coal mining working face 3. When the coal mining mechanism 11 is used to drop coal, the traveling winch 14 can pull the coal mining mechanism 11 through the steel strand 15, on the one hand, providing walking power for the coal mining mechanism 11, and on the other hand, guiding the coal mining mechanism 11 to prevent the coal mining mechanism 11 from moving downward to the coal wall side.

[0067] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mechanized mining system with flexible shielding support for steeply inclined coal seams, comprising a working face transport lane and a working face return air lane arranged parallel to the direction of the coal seam, and a coal mining working face arranged obliquely in the coal seam; in, An integral flexible shield support is laid in the coal mining working face, characterized in that: a coal mining mechanism is arranged in the forming area of ​​the integral flexible shield support, and the coal mining mechanism includes a walking part matched with the integral flexible shield support, and a cutting part whose rotation direction is perpendicular to the coal wall; a support disassembly station for disassembling the flexible shield support monomer is arranged at the end where the working face transport lane is connected to the coal mining working face, and a support assembly station for assembling the flexible shield support monomer is arranged at the end where the working face return air lane is connected to the coal mining working face; An enamel chute is also provided on the bottom beam of the flexible shielding support unit, and the enamel chute is fixedly connected to the bottom beam of the flexible shielding support unit through a hydraulic mechanism; The bracket disassembly station and the bracket assembly station are both manipulators used to disassemble and assemble the flexible shielding bracket monomer.

2. The mechanized mining system for the steeply inclined coal seam flexible shield support according to claim 1, Features: It also includes an uphill tunnel for transporting the flexible shielding support unit from the working face transport tunnel to the working face return air tunnel; the uphill tunnel is arranged in front of the coal mining working face.

3. The mechanized mining system for the steeply inclined coal seam flexible shield support according to claim 1 or 2, Features: The flexible shielding support monomer comprises a top beam, a shielding beam and a bottom beam which are hinged together in sequence; wherein an active telescopic support column is arranged between the top beam and the bottom beam.

4. The mechanized mining system for the steeply inclined coal seam flexible shield support according to claim 3, Features: An assembled flexible rack is provided on the bottom beam of the flexible shielding support unit; a gear track device adapted to the assembled flexible rack is provided on the side where the walking part of the coal mining mechanism contacts the bottom beam of the flexible shielding support unit, and a crawler device is provided on the side where the walking part contacts the top beam of the flexible shielding support unit.

5. The mechanized mining system for the steeply inclined coal seam flexible shield support according to claim 4, Features: It also includes a traction mechanism for ensuring stable movement of the coal mining mechanism; the traction mechanism includes a traveling winch arranged in the return air lane of the working face, and a steel strand arranged in the coal mining working face and connected to the traveling winch.

6. A mechanized mining method for steeply inclined coal seams with flexible shielding support, Features: The mechanized mining system for the steeply inclined coal seam flexible shield support according to any one of claims 1 to 5 comprises the following steps performed in sequence: S1. Laneway system layout: The coal mining face is arranged in a pseudo-inclined manner in the coal seam. In front of the coal mining face, an uphill lane is excavated along the inclination direction of the coal seam, and the face transport lane and face return air lane are excavated along the direction of the coal seam; the face transport lane is located at the lower end of the coal mining face and a support disassembly station is installed inside, while the face return air lane is located at the upper end of the coal mining face and a support assembly station is installed inside; S2. Support of coal mining working face: laying an integral flexible shielding support on the goaf side of the coal mining working face; installing a coal mining mechanism in the area formed by the integral flexible shielding support, wherein the walking part of the coal mining mechanism cooperates with the integral flexible shielding support, and the cutting part of the coal mining mechanism is in close contact with the coal wall; S3. Coal dropping and transportation at the coal mining face: The coal mining mechanism, driven by the walking unit, cuts coal upward along the coal mining face and cleans coal downward along the coal mining face. The mined coal is transported from the transport lane of the working face to the outside. The coal at the coal mining face is transported by self-sliding. As the coal mining mechanism cuts coal upward, the enamel chute is laid behind the coal mining mechanism driven by the hydraulic mechanism. As the coal mining mechanism continues to clean coal downward, the enamel chute is retracted ahead of the coal mining mechanism driven by the hydraulic mechanism. S4, support by frame shifting: After the single cycle of upward coal cutting and downward coal cleaning of the coal mining mechanism is completed, the overall flexible shielding support automatically moves toward the coal wall and descends in height; at the same time, the support disassembly station removes the redundant flexible shielding support monomers at the lower end of the coal mining working face, and transports them to the support assembly station through the working face transport lane, uphill lane, and working face return air lane in turn, and then the flexible shielding support monomers are assembled at the upper end of the coal mining working face through the support assembly station, thus completing a cycle; S5. Repeat steps S3 and S4 to advance the coal mining face continuously along the direction of the coal seam until all coal in the coal area is mined.

7. The mechanized mining method of steeply inclined coal seam flexible shield support according to claim 6, Features: In step S4, when it is determined that the distance between the coal mining face and the uphill tunnel is too large, a spare tunnel for transporting flexible shielding support units is excavated between the coal mining face and the uphill tunnel, and the spare tunnel is parallel to the coal mining face.

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