Gob-side entry retaining waste rock blocking support set for top coal caving working face

Abstract

The utility model discloses a top coal caving working face gob-side entry retaining waste rock blocking support set which comprises two waste rock blocking supports which are arranged side by side left and right, a first connecting device is arranged at the front end of a pier column side waste rock blocking support base, and the first connecting device is connected with the rear end of the bottom of a top coal caving transition support. A second connecting device is arranged at the front end of a top beam of the goaf side gangue blocking bracket, is connected with the rear end of the top of the top coal caving transition bracket, and comprises a pulling connecting frame, a pulling adjusting seat and a lengthened push rod. The two waste rock blocking supports are connected with the rear portion of the top coal caving transition support through a first connecting device and a second connecting device respectively, so that the goaf side waste rock blocking support can move forwards through the second connecting device, and after the goaf side waste rock blocking support moves, the pier column side waste rock blocking support can move forwards through the first connecting device. Due to the fact that the gob-side entry retaining gangue blocking device can provide working space for roadway sealing on the top coal caving working face, the gangue inrush probability is reduced.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machinery manufacturing technology, and in particular to a rock retaining support group for gob-side roadway retention in top coal caving working faces. Background Technology

[0002] In order to reduce the loss of coal pillars between the mining area transport roadways and the return air roadways, the technology of leaving roadways along the goaf has been promoted in recent years to improve the coal recovery rate. The sealing and retaining of gangue in the goaf is particularly important. The top coal caving mining process involves placing the top coal at the bottom and then having the coal transported away by the rear scraper. The problem that follows is that the top coal gangue collapses along with the coal seam, making the sealing and retaining of gangue in the roadway more difficult. Utility Model Content

[0003] To address the aforementioned shortcomings, the technical problem to be solved by this utility model is to provide a rock retaining support group for gob-side roadway closure in top coal caving working faces, thereby providing working space for roadway closure and reducing the probability of rock inrush.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A rock-blocking support group for a goaf retaining roadway in a top coal caving working face includes two rock-blocking supports arranged at the rear of the top coal caving transition support. The two rock-blocking supports are arranged side by side and are respectively defined as a pier-side rock-blocking support and a goaf-side rock-blocking support according to their arrangement positions. The pier-side rock-blocking support includes a base, and a first connecting device is provided at the front end of the base. The first connecting device is connected to the rear end of the bottom of the top coal caving transition support. The first connecting device includes two auxiliary pulling jacks and a circular chain assembly disposed between the two auxiliary pulling jacks. The goaf-side rock-blocking support includes a top beam, and a second connecting device is provided at the front end of the top beam. The second connecting device is connected to the rear end of the top of the top coal caving transition support. The second connecting device includes a pulling connecting frame, a pulling adjusting seat, and an extended push rod.

[0006] In a preferred embodiment, each of the aforementioned rock-blocking supports has a front beam hinged to the front of its top beam.

[0007] In a preferred embodiment, movable side guard plates are respectively provided on both sides of the top beam of the pier side retaining wall support.

[0008] In a preferred embodiment, a first fixed side guard plate is provided on both sides of the top beam of the goaf-side retaining wall support, and the first fixed side guard plate is detachably connected to the top beam.

[0009] The preferred embodiment is that the pier side rock-blocking support is a four-column, four-link hydraulic support for caving top coal, and the pier side rock-blocking support has a left-right symmetrical structure.

[0010] In a preferred embodiment, a bottom adjustment device is provided on the base of the pier side retaining rock support, the bottom adjustment device being used to adjust the position of the support on the working face and guide the movement of the support.

[0011] In a preferred embodiment, the goaf-side rock-blocking support is a four-column, four-link hydraulic support for caving top coal. The goaf-side rock-blocking support also includes a shield beam. The shield beam and the base are respectively provided with second fixed side guard plates on both sides. The second fixed side guard plates are detachably connected to the shield beam and the base.

[0012] In a preferred embodiment, the first connecting device is provided at the front end of the base of the goaf-side retaining wall support, and the first connecting device is connected to the rear end of the bottom of the top coal caving transition support.

[0013] In a preferred embodiment, the front end of the top beam of the pier-side rock-blocking support is provided with the second connecting device, and the second connecting device is connected to the rear end of the top of the top coal caving transition support.

[0014] The beneficial effects of this utility model after adopting the above technical solution are:

[0015] The present invention relates to a rock-blocking support group for a goaf-retaining roadway in a top-coal caving working face, comprising two rock-blocking supports arranged at the rear of the top-coal caving transition support. The two rock-blocking supports are arranged side by side and are defined as a pier-side rock-blocking support and a goaf-side rock-blocking support, respectively, according to their arrangement. The pier-side rock-blocking support includes a base, and a first connecting device is provided at the front end of the base. The first connecting device is connected to the rear end of the bottom of the top-coal caving transition support. The first connecting device includes two auxiliary pulling jacks and a circular chain assembly located between the two auxiliary pulling jacks. The goaf-side rock-blocking support includes a top beam, and a second connecting device is provided at the front end of the top beam. The second connecting device is connected to the rear end of the top of the top of the top-coal caving transition support. The second connecting device includes a pulling connecting frame, a pulling adjusting seat, and an extended push rod. In actual use, during the movement of the rock-blocking support group, the rock-blocking support on the goaf side is moved first, and then moved forward through the second connecting device. After the rock-blocking support on the goaf side is moved, the rock-blocking support on the pier side is moved forward through the first connecting device. Because this utility model realizes the rock-blocking in the goaf-retaining roadway in the top coal caving face to provide working space for roadway closure, it reduces the probability of rock inrush. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the utility model in use;

[0017] Figure 2 This is a schematic diagram of the structure of the goaf side in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the pier side in this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the first connecting device in the embodiment;

[0020] Figure 5 This is a schematic diagram of the structure of the second connecting device in the embodiment;

[0021] In the diagram: 1-Shore retaining support group, 10-Shore retaining support on the pier side, 11-Shore retaining support on the goaf side, 2-Front beam, 3-Top beam, 30-First fixed side guard plate, 4-Shield beam, 40-Second fixed side guard plate, 5-Base, 6-First connecting device, 7-Second connecting device, 8-Top coal caving transition support. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0024] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, a rockfall retaining support group 1 for a top coal caving working face includes two rockfall retaining supports arranged at the rear of the top coal caving transition support 8. The two rockfall retaining supports are arranged side by side and are defined according to their arrangement as a rockfall retaining support 10 on the pier side and a rockfall retaining support 11 on the goaf side. It should be noted that the goaf side is the side of the "cavity" created below the surface by human excavation or natural geological movement; the pier side refers to the side where the pier is set.

[0026] like Figure 3 and Figure 4As shown, the pier-side rock-blocking support 10 includes a base 5, and a first connecting device 6 is provided at the front end of the base 5. The first connecting device 6 is connected to the rear end of the bottom of the top coal caving transition support 8. The first connecting device 6 includes two auxiliary pulling jacks and a circular chain assembly located between the two auxiliary pulling jacks. In a preferred embodiment, the base 5 of the goaf-side rock-blocking support 11 is provided with the first connecting device 6 at the front end, and the first connecting device 6 is connected to the rear end of the bottom of the top coal caving transition support 8.

[0027] like Figure 2 and Figure 5 As shown, the goaf-side retaining wall support 11 includes a top beam 3, with a second connecting device 7 at the front end of the top beam 3. The second connecting device 7 is connected to the rear end of the top of the top coal caving transition support 8. The second connecting device 7 includes a pull-out connecting frame, a pull-out adjusting seat, and an extended push rod. In a preferred embodiment, the front end of the top beam 3 of the pier-side retaining wall support 10 is provided with the second connecting device 7, which is connected to the rear end of the top of the top of the top of the top coal caving transition support 8.

[0028] like Figure 2 As shown, the goaf-side retaining rock support 11 is a four-column, four-link hydraulic support for caving top coal. The front beam 2 is hinged to the front part of the top beam 3, which improves the applicability of the top beam 3.

[0029] In this embodiment, the goaf-side rock-blocking support 11 is a four-column, four-link hydraulic support for caving top coal. The goaf-side rock-blocking support 11 also includes a shield beam 4. Second fixed side guard plates 40 are respectively provided on both sides of the shield beam 4 and the base 5, and the second fixed side guard plates 40 are detachably connected to the shield beam 4 or the base 5. Simultaneously, first fixed side guard plates 30 are respectively provided on both sides of the top beam 3 of the goaf-side rock-blocking support 11, and the first fixed side guard plates 30 are detachably connected to the top beam 3. The first fixed side guard plates 30 and the second fixed side guard plates 40 are used to close off the rock-blocking area during the forward movement of the rock-blocking support, ensuring versatility for interchangeability between the left and right working faces.

[0030] The goaf-side retaining wall support 11 does not have a top beam 3 or movable side guard plate. Instead, multiple first fixed side guard plates 30 and / or second fixed side guard plates 40 are installed on the goaf side, achieving full enclosure of the goaf side.

[0031] In a preferred embodiment, the base 5 of the goaf-side retaining wall support 11 can also be equipped with a bottom adjustment device. This device is used to adjust the position of the support at the working face and guide its movement. The bottom adjustment device is an auxiliary device of the support, used for adjusting the position of the support at the working face and guiding its movement. The bottom adjustment device includes a bottom adjustment jack, which adjusts the position of the support and guides its movement by extending and retracting.

[0032] like Figure 3As shown, the top beam 3 of the pier side retaining wall support 10 is hinged to the front beam 2, which improves the applicability of the top plate. Movable side guard plates are provided on both sides of the top beam 3 of the pier side retaining wall support 10 to seal the top of the gangue. In addition, the movable side guard plates are used to seal the gangue during the forward movement of the support, and are easy to disassemble and assemble.

[0033] In a preferred embodiment, the pier-side rock-blocking support 10 is a four-column, four-link hydraulic support for caving top coal, and the pier-side rock-blocking support 10 has a symmetrical structure. Simultaneously, a bottom adjustment device is installed on the base 5 of the pier-side rock-blocking support 10, which is used to adjust the position of the support at the working face and guide the movement of the support.

[0034] like Figures 1 to 5 As shown in the diagram, when the goaf-side retaining rock block support group of this utility model is used in the goaf-cave working face, when the retaining rock block support group 1 moves, the goaf-side retaining rock block support 11 is moved first, and then moved forward through the second connecting device 7, that is, pulled and moved by the pulling connecting frame, the pulling adjusting seat and the extended push rod. The second connecting device 7 mainly assists in the pulling and moving of the goaf-side retaining rock block support 11 during the forward movement. After the goaf-side retaining rock block support 11 is moved, the pier-side retaining rock block support 10 is moved forward through the first connecting device 6, that is, pulled and moved by the two auxiliary pulling jacks and the circular chain assembly set in the middle of the two auxiliary pulling jacks. Because this utility model realizes the retention of rock block in the goaf-side retaining roadway of the top coal caving working face to provide working space for roadway closure, it reduces the probability of rock block inflow, and this utility model has the advantages of simple structure and convenient operation.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or improvements to the same type of gob-side retaining support group made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gang of coal caving face along the empty roadway to block the gangway support group, characterized in that, Two gangue blocking supports arranged behind the top coal caving transition support, the two gangue blocking supports are arranged side by side, and the two gangue blocking supports are defined as a pier column side gangue blocking support and a goaf side gangue blocking support according to the arrangement positions; The pier column side gangue blocking support comprises a base, a first connecting device is arranged at the front end of the base, the first connecting device is connected with the rear end of the bottom of the top coal caving transition support, and the first connecting device comprises two auxiliary pulling jacks and a round ring chain assembly arranged in the middle of the two auxiliary pulling jacks; The goaf side gangue blocking support comprises a top beam, a second connecting device is arranged at the front end of the top beam, the second connecting device is connected with the rear end of the top of the top coal caving transition support, and the second connecting device comprises a pulling connection frame, a pulling adjusting seat and an extended push rod.

2. The gang of the coal caving face along the empty roadway of the coal caving face, according to claim 1, characterized in that, The front part of the top beam of each gangue blocking support is hinged with a front beam.

3. The gang of the coal caving face along the empty roadway of the coal caving face, according to claim 1, characterized in that, The top beam of the pier column side gangue blocking support is provided with movable side guards on both sides thereof.

4. The gang of the coal caving face along the empty roadway of the coal caving face, according to claim 1, characterized in that, The top beam of the goaf side gangue blocking support is provided with first fixed side guards on both sides thereof, and the first fixed side guards are detachably connected with the top beam.

5. The gob-side retaining support assembly for top coal caving working faces according to claim 1, characterized in that, The pier column side gangue blocking support is a four-column positive four-link top coal caving hydraulic support, and the pier column side gangue blocking support is a left-right symmetrical structure.

6. The gob-side retaining support assembly for top coal caving faces according to claim 1, characterized in that, A bottom adjusting device is arranged on the base of the pier column side gangue blocking support, and the bottom adjusting device is used for adjusting the position of the support on the working face and guiding the movement of the support.

7. The gob-side retaining support assembly for top coal caving faces according to claim 1, characterized in that, The goaf side gangue blocking support is a four-column positive four-link top coal caving hydraulic support, and the goaf side gangue blocking support further comprises a shield beam, the shield beam and the base are provided with second fixed side guards on both sides thereof, and the second fixed side guards are detachably connected with the shield beam and the base.

8. The gob-side retaining support assembly for top coal caving faces according to claim 1, characterized in that, The front end of the base of the goaf side gangue blocking support is provided with the first connecting device, and the first connecting device is connected with the rear end of the bottom of the top coal caving transition support.

9. The gob-side retaining support assembly for top coal caving faces according to claim 1, characterized in that, The front end of the top beam of the pier column side gangue blocking support is provided with the second connecting device, and the second connecting device is connected with the rear end of the top of the top coal caving transition support.

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