An end support tail beam for in-situ processing of waste rock in fully-mechanized caving mining

Abstract

The application discloses a tail beam of an end support of a fully-mechanized caving mining gangue in-situ treatment, and relates to the technical field of fully-mechanized caving mining supports, which comprises an upper tail beam and a lower tail beam assembly; one end of the upper tail beam is hingedly connected with a shield beam of the end support, and the other end is overlapped on the inner side of the lower tail beam assembly; a scraper is movably connected between the lower tail beam assembly and the two end supports; and a beam door is movably arranged on the lower tail beam assembly. The tail beam of the end support of the fully-mechanized caving mining gangue in-situ treatment is combined with the existing end coal caving support by arranging the upper tail beam and the lower tail beam assembly, the structure of the tail beam of the end coal caving support is reformed, the problem of processing solid coal gangue at the end of the top coal caving working face is solved, the rear lower space of the tail beam filled with the processed gangue is mostly occupied, the bottom of the coal caving space is closer to the coal caving opening, the pseudo low-position coal caving is realized, and the top coal recovery rate of the end coal caving is improved.

Description

Technical Field

[0001] This invention relates to the technical field of fully mechanized longwall mining supports, and in particular to a tail beam of an end support for in-situ treatment of gangue in fully mechanized longwall mining. Background Technology

[0002] In recent years, the industry has been gradually developing new development concepts and directions for green and intelligent mining and clean, efficient and low-carbon utilization of coal. However, the comprehensive surface treatment technology of coal gangue, represented by gangue power generation and building material production, is becoming increasingly inadequate to cope with the increasing amount of coal gangue to be processed in mining areas. Therefore, research on underground coal gangue utilization and treatment methods is particularly important.

[0003] At present, the main method for treating gangue in top coal caving faces is grouting. Compared with the in-situ backfilling of gangue in the goaf of fully mechanized mining faces, the area behind the supports in top coal caving faces is mainly loose top coal and gangue, making it difficult to backfill solid gangue after the supports. However, the grouting equipment and transportation costs are high, and the workload of crusher backfilling is large. Summary of the Invention

[0004] The purpose of this invention is to provide a tail beam for the in-situ treatment of gangue in fully mechanized top coal caving mining, so as to solve the problems existing in the prior art. This allows for the in-situ treatment of gangue in the top coal caving face while forming a "pseudo-low-level coal caving" form, saving costs and improving the coal resource recovery rate.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a tail beam for an end support of a fully mechanized longwall mining gangue in-situ processing facility, comprising an upper tail beam and a lower tail beam assembly. One end of the upper tail beam is hinged to the shield beam of the end support, and the other end overlaps the inner side of the lower tail beam assembly. The lower tail beam assembly is movably connected to a scraper conveyor between the two end supports. A beam gate is movably provided on the lower tail beam assembly, which can receive the material transported on the scraper conveyor and allow the material to slide out of the doorway of the lower tail beam assembly.

[0007] Preferably, the upper tail beam is a rectangular stepped plate, with a hinge lug on the thick end and the thin end overlapping with the lower tail beam assembly. The hinge lug is hinged to the shield beam via a pin.

[0008] Preferably, the lower tail beam assembly includes a hydraulic rod, a lower tail beam, and a beam gate. The lower tail beam is hinged to the scraper conveyor via the hydraulic rod, and the beam gate is movably disposed in the middle of the lower tail beam.

[0009] Preferably, the upper end of the beam door is hinged to the hydraulic rod, and the lower end is hinged to the lower tail beam, so that the beam door matches the doorway of the lower tail beam.

[0010] Preferably, the upper end of the beam door is hinged to the base of the end bracket via two symmetrically hinged hydraulic rods.

[0011] Preferably, the lower tail beam is an arc-shaped panel that can contact the ground.

[0012] Preferably, a baffle is provided on one side of the lower tail beam in the vertical direction.

[0013] Preferably, the width of the lower tail beam and the beam gate are both greater than the width of the scraper conveyor, and the width of the lower tail beam matches the width between the two end supports.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] The present invention relates to a tail beam for in-situ treatment of gangue in fully mechanized coal caving. By setting up upper and lower tail beam components and combining them with existing end-coal caving supports, the tail beam structure of the end-coal caving support is modified, solving the problem of treating solid coal gangue at the end of the top coal caving face. At the same time, the treated gangue fills most of the lower space of the tail beam, making the bottom of the coal caving space closer to the coal caving port, and achieving "pseudo-low-level coal caving", thereby improving the top coal recovery rate at the end-coal caving face. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the tail beam structure of the end support for in-situ treatment of gangue in fully mechanized longwall mining according to the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the tail beam structure of the end support for in-situ treatment of gangue in fully mechanized longwall mining according to the present invention. Figure 2 ;

[0019] Figure 3 This is a schematic diagram illustrating the state changes of the tail beam of the end support for in-situ treatment of gangue in fully mechanized longwall mining according to the present invention.

[0020] Figure 4 This is a schematic diagram of the lower tail beam assembly in the present invention. Figure 1 ;

[0021] Figure 5 This is a schematic diagram of the lower tail beam assembly in the present invention. Figure 2 ;

[0022] Figure 6 This is a schematic diagram of the lower tail beam assembly in the present invention. Figure 3 ;

[0023] Figure 7 This is a schematic diagram of the upper tail beam structure in this invention. Figure 1 ;

[0024] Figure 8 This is a schematic diagram of the upper tail beam structure in this invention. Figure 2 ;

[0025] Among them: 1-tail beam of end support for in-situ treatment of gangue in fully mechanized mining, 2-upper tail beam, 3-lower tail beam, 4-hydraulic rod, 5-beam gate, 6-end support, 7-scraper conveyor, 8-baffle. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The purpose of this invention is to provide a tail beam for the in-situ treatment of gangue in fully mechanized top coal caving mining, so as to solve the problems existing in the prior art. This invention enables the in-situ treatment of gangue in the top coal caving face to form a "pseudo-low-level coal caving" form, thereby saving costs and improving the coal resource recovery rate.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 8 As shown: This embodiment provides a tail beam 1 for in-situ treatment of gangue in fully mechanized mining, including an upper tail beam 2 and a lower tail beam assembly. One end of the upper tail beam 2 is hinged to the shield beam of the end support 6, and the other end overlaps the inner side of the lower tail beam assembly. The lower tail beam assembly is movably connected to the scraper conveyor 7 between the two end supports 6. A beam gate 5 is movably provided on the lower tail beam assembly. The beam gate 5 can receive the material transported on the scraper conveyor 7 and allow the material to slide out of the doorway of the lower tail beam assembly.

[0030] The upper tail beam 2 is a rectangular stepped plate. The thick end of the rectangular stepped plate is provided with a hinge lug, and the thin end overlaps with the lower tail beam assembly. The hinge lug is hinged to the shield beam by a pin. The upper tail beam 2 is not connected to the hydraulic rod 4. The upper end can swing at the hinge point with the shield beam, and the lower end is constrained by the lower tail beam assembly.

[0031] The lower tail beam assembly includes a hydraulic rod 4, a lower tail beam 3, and a beam gate 5. The lower tail beam 3 is hinged to the scraper conveyor 7 via a hydraulic rod 4, and the beam gate 5 is movably installed in the middle of the lower tail beam 3. The upper end of the beam gate 5 is hinged to the hydraulic rod 4, and the lower end is hinged to the lower tail beam 3, matching the doorway of the lower tail beam 3. The upper end of the beam gate 5 is hinged to the base of an end bracket 6 via two symmetrically hinged hydraulic rods 4. The opening and closing of the beam gate 5 can be controlled by a telescopic hydraulic cylinder. An electromagnetic lock is installed at the hinge point between the beam gate 5 and the hydraulic rod 4. The electromagnetic lock can lock after the lower tail beam assembly is pushed inward to its position, preventing uneven reduction of the hydraulic rod 4 from causing the lower tail beam assembly door 5 to tip over, thus affecting the gangue processing work. The electromagnetic lock is a conventional electromagnetic lock structure in the mechanical field and will not be described in detail here. During the coal discharge process, scraper conveyor 7 rotates into the roadway to transfer coal along the middle position. During the gangue throwing process, scraper conveyor 7 reverses, and beam gate 5 opens, forming a guide channel for coal gangue. Coal gangue in the roadway is thrown into the goaf roadway along beam gate 5. When beam gate 5 is fully closed, it can move synchronously with the lower tail beam 3, pushing and compacting the gangue behind the tail beam, effectively supporting the mining area above. The switching between the coal transport and gangue throwing modes is achieved by adjusting the scraper's rotation direction. Because the gangue thrown into the goaf effectively supports the mining area above, the loss of low-level top coal during coal discharge is reduced, improving the top coal recovery rate. The lower tail beam 3 is an arc-shaped panel that can contact the ground (similar to the structure of a bulldozer blade), and the lower tail beam 3 is generally crescent-shaped. A baffle 8 is installed vertically on one side of the lower tail beam 3 (the side closest to the working surface or transition frame) to collect the gangue when the lower tail beam assembly is pushed. The width of both the lower tail beam 3 and the beam gate 5 is greater than the width of the scraper conveyor 7, and the width of the lower tail beam 3 matches the width between the two end supports 6.

[0032] In this embodiment, the lower tail beam assembly, consisting of the beam gate 5 and the lower tail beam 3, not only compacts the gangue filled behind the tail beam, ensuring that the gangue at the rear of the tail beam can form a relatively stable shape, but also guides the gangue flow when the lower tail beam assembly gate 5 is opened. Combined with the scraper conveyor 7 to transport the gangue flow, the coal gangue is processed and transported to the goaf in situ. The degree of mechanization is high, solving the problem of processing solid coal gangue at the end of the top coal caving face. Combined with the existing coal discharge end support 6, while the gangue in the top coal caving face fills most of the space at the rear of the tail beam in situ, the bottom of the coal discharge space is closer to the coal discharge port, forming a "pseudo-low-position coal discharge" form, which can improve the coal resource recovery rate.

[0033] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A tail beam for in-situ treatment of gangue in fully mechanized longwall mining, characterized in that: The device includes an upper tail beam and a lower tail beam assembly. One end of the upper tail beam is hinged to the shield beam of the end support, and the other end overlaps the inner side of the lower tail beam assembly. The lower tail beam assembly is movably connected to the scraper conveyor between the two end supports. A beam door is movably provided on the lower tail beam assembly. The beam door can receive the material transported on the scraper conveyor and allow the material to slide out of the doorway of the lower tail beam assembly. The lower tail beam assembly includes a hydraulic rod, a lower tail beam, and a beam gate. The lower tail beam is hinged to the scraper conveyor via the hydraulic rod, and the beam gate is movably disposed in the middle of the lower tail beam.

2. The tail beam of the end support for in-situ treatment of gangue in fully mechanized longwall mining according to claim 1, characterized in that: The upper tail beam is a rectangular stepped plate. The thick end of the rectangular stepped plate is provided with a hinge lug, and the thin end overlaps with the lower tail beam assembly. The hinge lug is hinged to the shield beam through a pin.

3. The tail beam of the end support for in-situ treatment of gangue in fully mechanized caving mining according to claim 1, characterized in that: The upper end of the beam door is hinged to the hydraulic rod, and the lower end is hinged to the lower tail beam, so that the beam door matches the doorway of the lower tail beam.

4. The tail beam of the end support for in-situ treatment of gangue in fully mechanized longwall mining according to claim 3, characterized in that: The upper end of the beam door is hinged to the base of the end bracket by two symmetrically hinged hydraulic rods.

5. The tail beam of the end support for in-situ treatment of gangue in fully mechanized longwall mining according to claim 1, characterized in that: The lower tail beam is an arc-shaped panel that can contact the ground.

6. The tail beam of the end support for in-situ treatment of gangue in fully mechanized longwall mining according to claim 1, characterized in that: A baffle is provided on one side of the lower tail beam in the vertical direction.

7. The tail beam of the end support for in-situ treatment of gangue in fully mechanized longwall mining according to claim 1, characterized in that: The width of the lower tail beam and the beam gate are both greater than the width of the scraper conveyor, and the width of the lower tail beam matches the width between the two end supports.

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