Gob-side entry retaining narrow hydraulic support top beam and hydraulic support

Abstract

The utility model discloses a gob-side entry retaining narrow hydraulic support top beam and a hydraulic support, and belongs to the technical field related to mining hydraulic supports, and the gob-side entry retaining narrow hydraulic support top beam comprises a top beam main body, an auxiliary gangue blocking unit and a limiting unit; a driving cavity and a limiting cavity are formed in the two sides of the bottom of the top beam body in the length direction. Limiting openings are formed in the outer sides of the limiting cavities, and the limiting cavities are used for containing the corresponding limiting units; the auxiliary gangue blocking unit is connected to the outer side of the top beam body in the length direction through a telescopic push rod. The gangue blocking device is provided with an extensible gangue blocking working face, and the extending direction of the gangue blocking working face is consistent with the telescopic working direction of the telescopic push rod; the limiting unit is connected with the auxiliary waste rock blocking unit, can be driven by a telescopic push rod to enter a corresponding limiting cavity, and is used for connection operation between top beams of two hydraulic supports arranged side by side and connection between top beams of narrow hydraulic supports arranged side by side, so that the toppling probability is reduced, and waste rock blocking operation is formed between the supports.

Description

Technical Field

[0001] The utility model belongs to the technical field related to mining hydraulic supports, and in particular relates to a top beam of a narrow hydraulic support for a goaf-side lane retention and a hydraulic support. Background Art

[0002] Gob-side entry retention is the practice of maintaining the original mining roadway along the edge of the goaf after the working face is mined. To recover the protective coal pillars left in traditional mining methods, certain technical measures are employed to re-support the drift from the previous section, leaving it for use in the next section. This practice of retaining the drift along the edge of the goaf at the original drift location is called gob-side entry retention.

[0003] The side support of the goaf-retained tunnel adopts a double-row, multi-section, narrow, split-type support device (the filling body does not have a large support strength in the initial stage, and the hydraulic supports placed side by side provide continuous support for the tunnel roof. The supports are set side by side to ensure that when one of them moves, the other continues to support the tunnel roof). Two narrow hydraulic supports are placed side by side (the placement area of ​​the goaf is relatively narrow, so the top beam cannot be set to a large width, and a narrow body is required and the support is split). Multiple narrow hydraulic supports are provided in each row for support, and an electro-hydraulic control system is used for remote control to ensure side support. There will be a problem of gangue leakage between the narrow hydraulic supports placed side by side, and there is a hidden danger of instability (dumping) due to the narrow placement during support. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the utility model provides a narrow hydraulic support top beam and hydraulic support along the goaf, which are connected between the top beams of the narrow hydraulic supports placed side by side to reduce the chance of tipping, and at the same time form a slag blocking operation between the supports, solving the problems in the background technology.

[0005] The technical solution adopted by the present invention is as follows: a narrow-body hydraulic support top beam and hydraulic support along an empty tunnel, comprising a top beam body, an auxiliary rock-blocking unit and a limiting unit; a driving cavity and a limiting cavity are respectively arranged on both sides of the length direction of the bottom of the top beam body; a limiting opening is opened on the outside of the limiting cavity, and the limiting cavity is used to accommodate the corresponding limiting unit; the auxiliary rock-blocking unit is connected to the outside of the length direction of the top beam body through a telescopic push rod; it has an extendable rock-blocking working surface, and the extending direction of the rock-blocking working surface is consistent with the telescopic operating direction of the telescopic push rod; the limiting unit is connected to the auxiliary rock-blocking unit, and can be driven into the corresponding limiting cavity by the telescopic push rod for connection operation between two hydraulic support top beams placed side by side.

[0006] Furthermore, the auxiliary rock-blocking unit includes a fixed vertical plate, which is located on the outside of the top beam body and connected to the telescopic end of the telescopic push rod, and the fixed vertical plate is opposite to the side guard plate of the top beam body; an extension unit, one side of which is connected to the top end of the fixed vertical plate and the other side extends toward the side guard plate of the top beam body.

[0007] Furthermore, the limiting unit includes a limiting body, a telescopic column and a positioning block; the limiting body can enter and exit the corresponding limiting cavity when the telescopic push rod performs the corresponding telescopic operation; the hollow interior of the limiting body defines a bearing cavity, and the top of the bearing cavity is open; the telescopic column is arranged on the bottom wall of the bearing cavity, and the telescopic end can enter and exit the bearing cavity from the top opening of the bearing cavity; the positioning block is assembled on the telescopic end of the telescopic column, the size of which matches the top opening of the bearing cavity, and can enter and exit the bearing cavity with the telescopic operation of the telescopic column. When extending out of the bearing cavity, it is used to abut against the top wall of the corresponding limiting cavity. The positioning block extends along the length direction of the top beam body and has a predetermined length.

[0008] Furthermore, the extension unit includes a fixed transverse plate and an extension plate; one side of the fixed transverse plate is fixed to the top end of the fixed side plate close to the side of the top beam body, and the other side extends toward the side of the top beam body, and a sliding channel is defined inside the fixed transverse plate, and the sliding channel is open on the side close to the top beam body; the top end of the fixed transverse plate forms a slag retaining working surface; the extension plate can slide in and out of the sliding channel, and the side of the extension plate located in the sliding channel is connected to the inner wall of the sliding channel through a support spring, and the support spring applies an outward thrust to the extension plate, so that the outer side of the extension plate presses against the outer wall of the side guard plate of the top beam body, and the top end of the extension plate forms a slag retaining working surface.

[0009] Furthermore, a friction layer is provided on the top of the positioning block.

[0010] The present application also proposes a hydraulic support, comprising the top beam described above, wherein the top beam has a predetermined support length.

[0011] After adopting the above structure, the beneficial effects of the utility model are as follows:

[0012] (1) By setting the auxiliary rock retaining unit on the side of the top beam, it can be adaptively deployed between the top beams of two hydraulic supports placed side by side to achieve rock retaining operation;

[0013] (2) By setting a limit unit, it is connected between two hydraulic support top beams placed side by side to improve the stability of the hydraulic support during overall support. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0015] Figure 1 This is a schematic diagram of the overall structure of a narrow hydraulic support top beam for gob-side tunnel retention proposed in the utility model;

[0016] Figure 2 This is a half-section view of the top beam of a narrow hydraulic support for gob-side tunnel retention proposed in the utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of the top beam of a narrow hydraulic support for gob-side tunnel retention proposed by the present invention from another angle;

[0018] Figure 4 This is a schematic diagram of the connection state of the top beam of a narrow-body hydraulic support for retaining a tunnel along the gob proposed in the utility model.

[0019] In the attached drawings: 1. top beam body, 2. side guard plate, 3. drive cavity, 4. limit cavity, 5. telescopic push rod, 6. fixed vertical plate, 7. limit body, 8. telescopic column, 9. positioning block, 10. fixed horizontal plate, 11. extension plate, 12. friction layer, 13. bearing cavity, 14. support spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Example 1

[0023] like Figure 1-Figure 4As shown, a top beam of a narrow-body hydraulic support for retaining a tunnel along a goaf and a hydraulic support, comprising a top beam body 1, an auxiliary rock-blocking unit and a limiting unit; wherein a driving cavity 3 and a limiting cavity 4 are respectively provided on both sides of the bottom length direction of the top beam body 1; a limiting opening is provided on the outer side of the limiting cavity 4, and the limiting cavity 4 is used to accommodate the corresponding limiting unit; the auxiliary rock-blocking unit is connected to the outer side of the top beam body 1 in the length direction through a telescopic push rod 5, the driving end of the telescopic push rod 5 being provided in the driving cavity 3, and the telescopic end can extend out of the driving cavity 3 to connect with the auxiliary rock-blocking unit; the auxiliary rock-blocking unit has an extendable rock-blocking working surface, and the extending direction of the rock-blocking working surface is consistent with the telescopic operating direction of the telescopic push rod 5, and is deployed between the top beams of the parallel hydraulic supports to perform corresponding rock-blocking operations;

[0024] In some preferred embodiments, the auxiliary rock retaining unit includes a fixed vertical plate 6, located outside the main beam 1 and connected to the telescopic end of a telescopic push rod 5. The fixed vertical plate 6 faces the side guard plate 2 of the main beam 1; and an extension unit, one side of which is connected to the top of the fixed vertical plate 6 and the other side of which extends toward the side guard plate 2 of the main beam 1. Between two side-by-side brackets, the telescopic push rod 5 is controlled to push the fixed vertical plate 6 and the extension unit mounted on the fixed vertical plate 6 toward the other bracket's main beam, causing the fixed vertical plate 6 to abut against the side guard plate 2 of the corresponding top beam.

[0025] Specifically, the extension unit includes a fixed cross plate 10 and an extension plate 11; one side of the fixed cross plate 10 is fixed to the top end of the fixed side plate close to the side of the top beam body 1, and the other side extends toward the side of the top beam body 1, and a sliding channel is defined inside the fixed cross plate 10, and the sliding channel is opened on the side close to the top beam body 1; the top end of the fixed cross plate 10 forms a slag blocking working surface; the extension plate 11 can slide in and out of the sliding channel, and the side of the extension plate 11 located in the sliding channel is connected to the inner wall of the sliding channel by a support spring 14. A plurality of support springs are provided, which are arranged at intervals along the length direction of the top beam body. The support springs 14 apply an outward thrust to the extension plate 11, so that the outer side of the extension plate 11 rests against the outer wall of the side guard plate 2 of the top beam body 1, and the top surface of the extension plate 11 forms a slag blocking working surface. The sliding channel in and out of the fixed cross plate 10 changes the range of the slag blocking operation according to the actual distance between the two top beams. When the fixed vertical plate 6 approaches the adjacent support top beam, the support spring 14 pushes the extension plate 11 outward, and the other side of the extension plate 11 always rests on the top beam side guard plate 2 of its own support, changing the width range of the slag retaining operation.

[0026] Example 2

[0027] On the basis of the above embodiment, further, the limiting unit is connected to the auxiliary rock blocking unit and can be driven into the corresponding limiting cavity 4 by the telescopic push rod 5 for connection operation between two hydraulic support top beams placed side by side.

[0028] Specifically, the limiting unit includes a limiting body 7, a telescopic column 8 and a positioning block 9; the limiting body 7 can enter and exit the corresponding limiting cavity 4 (the limiting cavity 4 on the side of the adjacent top beam) when the telescopic push rod 5 performs the corresponding telescopic operation; the internal hollow space of the limiting body 7 defines a bearing cavity 13, and the top of the bearing cavity 13 is open; the telescopic column 8 is arranged on the inner bottom wall of the bearing cavity 13, and the telescopic end can enter and exit the bearing cavity 13 from the top opening of the bearing cavity 13; the positioning block 9 is assembled on the telescopic end of the telescopic column 8, and its size matches the top opening of the bearing cavity 13. It can enter and exit the bearing cavity 13 with the telescopic operation of the telescopic column 8, and when extending out of the bearing cavity 13, it is used to abut against the inner top wall of the corresponding limiting cavity 4. The positioning block 9 extends along the length direction of the top beam body 1 and has a predetermined length, and preferably, a friction layer 12 is provided on the top of the positioning block 9. When the telescopic push rod 5 pushes the fixed vertical plate 6 to move to the adjacent top beam side guard plate 2, the limiting body 7 enters the limiting cavity 4 through the opening on the outside of the limiting cavity 4. At this time, the telescopic column 8 is controlled to lift the positioning block 9, and the positioning block 9 extends out of the bearing cavity 13 and rests on the top wall of the limiting cavity 4 to limit the limiting body 7, so as to prevent the limiting body 7 from detaching from the limiting cavity 4 when the top beam tilts, and connecting between two adjacent top beams, thereby increasing the stability of the top beam support.

[0029] Example 3

[0030] This application also proposes a hydraulic support comprising the top beam described in Examples 1-2, the top beam having a predetermined support length, one side of the top beam connected to an auxiliary rock retaining unit and a limiting unit, and the other side having a limiting cavity 4. The limiting cavity 4 has an opening disposed on the outside to accommodate the limiting units of the top beams of the hydraulic supports placed side by side, thereby connecting the two supports to increase the stability of the support device. The hydraulic supports are placed side by side, and multiple groups are arranged in each row, connected end to end by a sliding mechanism, to provide roadside support along the gob-side entry.

[0031] The specific usage is as follows: Narrow hydraulic supports are placed side by side for gob-side entry support. The top beams of these supports are connected by limit units, and auxiliary rock-blocking units are used to block rock between the two supports. Specifically, the telescopic push rod 5 is controlled to push the fixed vertical plate 6 to the top beam of the adjacent hydraulic support. The extension plate 11 of the extension unit is pushed out by the support spring 14 and rests on the corresponding side guard plate 2 of the support's top beam. The extended extension plate 11 and the fixed horizontal plate 10 work together to block rock between the hydraulic supports.

[0032] When the fixed vertical plate 6 is pushed to the adjacent hydraulic support top beam, the limiting body 7 enters the limiting cavity 4 from the side opening of the limiting cavity 4 of the adjacent hydraulic support top beam. At this time, the positioning block 9 is lifted by the telescopic column 8 so that the positioning block 9 rests on the top wall of the corresponding limiting cavity 4, thereby realizing a stable connection between the two hydraulic support top beams.

[0033] When the hydraulic support is performing support operations, two narrow hydraulic supports can be placed side by side, connected between the side-by-side hydraulic supports through a limiting unit, and placed front and back between multiple rows of hydraulic supports, and connected end to end through a pushing mechanism to facilitate frame movement.

[0034] It should be noted that in other embodiments, two brackets may be arranged side by side, with the first one (located on the inner side) having an auxiliary gangue blocking unit and a limiting unit, and the second one (located on the outer side) having a limiting cavity (with an opening on the side) matching the limiting unit of the top beam of the first bracket;

[0035] In addition, both supports are equipped with auxiliary rock retaining units. The auxiliary rock retaining units located on the outside can be further extended to adjust the outer rock retaining operation range.

[0036] The outer bracket is also equipped with a limit unit to adjust the height of the positioning plate. The positioning plate can be used to provide auxiliary support to the top plate, increase the support area and help improve the stability of the bracket.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents. In short, if those skilled in the art are inspired by this, and without departing from the purpose of the invention of the present invention, they can design structural methods and embodiments similar to the technical solution without creativity, and they should all fall within the scope of protection of the present invention. Each component of the present application can be driven by a corresponding external motor, which is a prior art and will not be described in detail in this application.

Claims

1. A narrow hydraulic support top beam for gob-side tunnel retaining, characterized in that: include: The top beam body has a driving cavity and a limiting cavity on both sides of the bottom in the length direction; a limiting opening is provided on the outside of the limiting cavity, and the limiting cavity is used to accommodate the corresponding limiting unit; The auxiliary rock retaining unit is connected to the outside of the main body of the top beam in the length direction through a telescopic push rod; it has an extendable rock retaining working surface, and the extension direction of the rock retaining working surface is consistent with the extension direction of the telescopic push rod; The limiting unit is connected to the auxiliary rock-blocking unit and can be driven into the corresponding limiting cavity by a telescopic push rod, and is used for the connection operation between the top beams of two hydraulic supports placed side by side.

2. The narrow-body hydraulic support top beam for gob-side tunnel retaining according to claim 1, characterized in that: The auxiliary rock-blocking unit includes a fixed vertical plate, which is located on the outside of the top beam body and connected to the telescopic end of the telescopic push rod. The fixed vertical plate is opposite to the side guard plate of the top beam body; an extension unit, one side of which is connected to the top end of the fixed vertical plate and the other side extends toward the side guard plate of the top beam body.

3. The narrow-body hydraulic support top beam for gob-side tunnel retaining according to claim 1, characterized in that: The limiting unit includes: The limiting body can enter and exit the corresponding limiting cavity when the telescopic push rod performs the corresponding telescopic operation; the limiting body is hollow inside to define a bearing cavity, and the top of the bearing cavity is open; A telescopic column is arranged on the bottom wall of the bearing cavity, and the telescopic end can enter and exit the bearing cavity through the top opening of the bearing cavity; The positioning block is assembled at the telescopic end of the telescopic column. Its size matches the opening at the top of the load-bearing cavity. It can enter and exit the load-bearing cavity as the telescopic column is extended and retracted. When extending out of the load-bearing cavity, it is used to abut against the top wall of the corresponding limit cavity. The positioning block extends along the length direction of the top beam body and has a predetermined length.

4. The top beam of a narrow hydraulic support for gob-side tunnel retention according to claim 2, characterized in that: The stretching unit comprises: A fixed transverse plate, one side of which is fixed to the top of the fixed side plate near the top beam body, and the other side of which extends toward the top beam body. A sliding channel is defined within the fixed transverse plate, and the sliding channel is open on the side near the top beam body. The top of the fixed transverse plate forms a gangue retaining working surface. An extension plate can slide in and out of the sliding channel. One side of the extension plate located in the sliding channel is connected to the inner wall of the sliding channel through a support spring. The support spring applies an outward thrust to the extension plate, so that the outer side of the extension plate rests against the outer wall of the side guard plate of the top beam body, and the top end of the extension plate forms a slag retaining working surface.

5. The narrow-body hydraulic support top beam for gob-side tunnel retaining according to claim 3 is characterized in that: A friction layer is provided on the top of the positioning block.

6. A hydraulic support, characterized in that: The top beam comprises the top beam according to any one of claims 1 to 5, wherein the top beam has a predetermined support length.

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