Roof-cutting roadway-forming gangue-side gangue-blocking hydraulic support

Abstract

The utility model provides a roof-cutting roadway-forming gangue side retaining hydraulic support which is characterized in that a first telescopic column is arranged at one end of a base, and a folding connecting rod is hinged to the middle of the base; one end of the top beam is hinged to the top of the first telescopic column, the middle of the folding connecting rod is bent towards the side away from the first telescopic column, and the top of the folding connecting rod is connected to the position, close to the first telescopic column, of the top beam. The other end of the second telescopic column is hinged to the end, away from the first telescopic column, of the top beam. The hydraulic supports are connected end to end along the side, corresponding to gangue, of the roadway, gangue blocking supports extend out of the sides, corresponding to the gangue, of the top beam and the base, and gangue blocking plates corresponding to the roadway blocking rod sides are supported through the gangue blocking supports. Therefore, the gangue retaining plate is used for supporting the gangue side, instability of the gangue side is avoided, and the supporting strength of the roadway gangue side within the advanced influence range of the coal face can be improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of surrounding rock control, specifically relating to a hydraulic support for rock retaining walls in a rock cutting tunnel. Background Technology

[0002] Roof-cutting roadway construction is widely used in coal mines. It reduces the impact of mine pressure on the working face and decreases the amount of roadway excavation. In this process, after the roof is cut at the working face, the roof strata collapse. Under the influence of mine pressure and the fragmentation characteristics of the rock mass, gangue flows into the roadway, reducing roadway space and affecting its usability. Currently, the roof-cutting roadway construction system typically uses a single-layer mesh structure formed by U-shaped steel, metal mesh, clamps, and connecting rods to fix the gangue against the roadway walls. However, under the influence of dynamic loads and advance support pressure during working face mining, the gangue support in roof-cutting roadways near the coal face is difficult, and conventional hydraulic supports cannot adequately support the walls.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides a hydraulic support for the rock retaining wall of the cutting-roof tunnel.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hydraulic support for rockfill retaining walls in a cut-and-cover tunnel, the hydraulic support comprising:

[0007] A base, one end of which is provided with a first telescopic column, and a folding connecting rod is hinged to the middle of the base;

[0008] The top beam has one end hinged to the top of the first telescopic column, the middle part of the folding link bends away from the first telescopic column, and the top of the folding link is connected to the top beam near the first telescopic column.

[0009] The second telescopic column has one end hinged to the middle of the folding link and the other end hinged to the end of the top beam away from the first telescopic column.

[0010] Multiple hydraulic supports are connected end to end along one side of the roadway corresponding to the gangue. A gangue-blocking support extends from one side of the top beam and base corresponding to the gangue, so as to support the gangue-blocking plate on the side of the roadway retaining rod through the gangue-blocking support.

[0011] Preferably, the base and the top beam are connected at one end of the first telescopic column via a protective frame. The protective frame includes a first channel steel and a second channel steel that are nested together, and a rock-blocking bracket is provided on the first channel steel.

[0012] Preferably, the top beam has a front beam at one end corresponding to the second telescopic column, and the end of the top beam has an inner cavity for the front beam to be slidably assembled along its length direction, and the inner cavity has a third telescopic column corresponding to the front beam.

[0013] Preferably, the front beam has a downward-opening mounting groove at its front end, a side guard plate is hinged to the end of the mounting groove, and a fourth telescopic column is hinged between the middle of the side guard plate and the front beam.

[0014] Preferably, the main body of the side guard plate is a downward-facing groove, an extension plate is provided at the front end of the side guard plate, and a connection station corresponding to the extension plate is provided at the rear end of the top beam.

[0015] Preferably, the rock-blocking support is a hydraulic cylinder.

[0016] Beneficial effects: By connecting hydraulic supports end to end to support the roadway gangue sidewalls, and utilizing the lateral support force provided by the gangue retaining supports, the gangue retaining plates can be used to support the gangue sidewalls, preventing the gangue sidewalls from becoming unstable. This can improve the support strength of the roadway gangue sidewalls within the advance influence range of the coal mining face. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0018] Figure 1 This is a simplified structural diagram of the hydraulic support in a specific embodiment of this utility model.

[0019] In the diagram: 1. Base; 2. Second channel steel; 3. First channel steel; 4. Top beam; 5. Waste rock retainer; 6. Front beam; 7. Side guard plate; 8. Fourth telescopic column; 9. Second telescopic column; 10. Upper rod; 11. Lower rod; 12. First telescopic column; 13. Waste rock retainer plate. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0021] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0023] like Figure 1 As shown, a hydraulic support for a rockfill retaining wall in a tunnel is disclosed. The hydraulic support includes a base 1, a top beam 4, a rockfill retaining support 5, a first telescopic column 12, and a second telescopic column 9. The first telescopic column 12 is located at one end of the base 1, and a folding connecting rod is hinged to the middle of the base 1. The folding connecting rod includes an upper rod 10 and a lower rod 11, which are connected by a hinge. The hinge point of the folding connecting rod bends away from the first telescopic column 12, forming an angle. While the first telescopic column 12 extends and retracts, the folding connecting rod can be unfolded or folded together, facilitating movement within the tunnel. The top beam 4 supports the tunnel roof. The top of the first telescopic column 12 is hinged to the bottom of one end of the top beam 4. The middle of the folding connecting rod bends away from the first telescopic column 12. The combined length of the upper rod 10 and the lower rod 11 is greater than the extended state of the first telescopic column 12. Therefore, after the first telescopic column 12 is lifted, the folding connecting rod still has a certain angle. The top of the folding connecting rod is connected to the top beam 4 near the first telescopic column 12, so that it can fold or unfold with the extension and retraction of the first telescopic column 12. In order to support the other end of the top beam 4 and ensure the support capacity for the roadway, this application sets a second telescopic column 9 to adjust and support the angle of the top beam 4. One end of the second telescopic column 9 is hinged to the middle of the folding connecting rod. Specifically, the second telescopic column 9 is supported at the lower end of the upper rod 10, and the other end of the second telescopic column 9 is hinged to the end of the top beam 4 away from the first telescopic column 12. Thus, the pressure of the top plate is transmitted to the base 1 through the lower rod 11 via the second telescopic column 9.

[0024] Multiple hydraulic supports are positioned along one side of the roadway corresponding to the gangue, thereby supporting the gangue side and ensuring the stability of the roadway. The gangue side of the roadway is equipped with a gangue retaining plate 13, the height of which is adapted to the gangue side of the roadway, and the length of which is adapted to the length of the top beam 4. A gangue retaining bracket 5 extends from the side of the top beam 4 and base 1 corresponding to the gangue, so as to support the gangue retaining plate 13 on the side of the roadway retaining rod, thereby ensuring the support effect and avoiding the risk of instability caused by deformation of the gangue side of the roadway.

[0025] The side of the rock-blocking plate 13 is provided with screw holes corresponding to the rock-blocking bracket 5, and the end of the rock-blocking bracket 5 is provided with a connecting plate for connecting the rock-blocking plate 13 by bolts. Multiple ribs are distributed on the rock-blocking plate 13.

[0026] In an optional embodiment, to further support the sidewalls of the hydraulic support, a protective frame is connected to one end of the base 1 and the top beam 4 corresponding to the first telescopic column 12. The protective frame supports the rock-blocking plate 13 through the rock-blocking support on one hand, and protects the first telescopic column 12 on the other hand. The protective frame is a telescopic structure, which can adapt to the telescopic movement of the first telescopic column 12. The protective frame includes a first channel steel 3 and a second channel steel 2 that are nested together. The first telescopic column 12 is located inside the first channel steel 3 and the second channel steel 2. A rock-blocking support 5 is correspondingly provided on the first channel steel 3, thereby meeting the telescopic requirements and having a certain supporting capacity to support the rock-blocking plate 13 and improve the stability of the rock-blocking plate 13.

[0027] In an optional embodiment, a front beam 6 is provided at one end of the top beam 4 corresponding to the second telescopic column 9. The front beam 6 can be telescopic, thereby facilitating movement. The top beam 4 has a square structure, and the end of the top beam 4 is provided with an inner cavity for the front beam 6 to be slidably assembled along its length direction. The inner cavity of the top beam 4 is adapted to the cross-sectional shape of the front beam 6. A third telescopic column corresponding to the front beam 6 is provided in the inner cavity of the top beam 4, thereby controlling the front beam 6 to telescopically extend and retract along the length direction of the top beam 4.

[0028] A downward-opening mounting groove is provided at the front end of the front beam 6. The front end of the mounting groove extends to the front end of the front beam 6 and is connected to a side guard plate 7 via a hinge shaft. A fourth telescopic column 8 is hinged between the middle of the side guard plate 7 and the front beam 6. Both the side guard plate 7 and the front beam 6 are provided with hinge plates corresponding to the fourth telescopic column 8, so that the side guard plate 7 can be folded as the fourth telescopic column 8 extends and retracts.

[0029] In an optional embodiment, the main body of the side guard plate 7 is provided with flanges on both sides to form a groove structure with downward opening. The flanges on both sides of the side guard plate 7 extend obliquely from back to front to the lower edge of the main body. An extension plate is provided at the front end of the side guard plate 7, and a connection station corresponding to the extension plate is provided at the rear end of the top beam 4. The extension plate is then erected at the rear end of the top beam 4 so that two adjacent hydraulic supports are connected at the end.

[0030] The rock retaining support 5 is a hydraulic cylinder to accommodate the gap between the hydraulic support and the rockfill embankment. Prestress can be applied through the rock retaining support 5 to ensure the support effect. Furthermore, the first telescopic column 12, the second telescopic column 9, the third telescopic column, and the fourth telescopic column 8 are all hydraulic cylinders. A traction cylinder is also provided on the base 1 for moving the hydraulic support.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. A hydraulic support for retaining rock in a cut-and-cover tunnel, characterized in that, The hydraulic support includes: A base, one end of which is provided with a first telescopic column, and a folding connecting rod is hinged to the middle of the base; The top beam has one end hinged to the top of the first telescopic column, the middle part of the folding link bends away from the first telescopic column, and the top of the folding link is connected to the top beam near the first telescopic column. The second telescopic column has one end hinged to the middle of the folding link and the other end hinged to the end of the top beam away from the first telescopic column. Multiple hydraulic supports are connected end to end along one side of the roadway corresponding to the gangue. A gangue-blocking support extends from one side of the top beam and base corresponding to the gangue, so as to support the gangue-blocking plate on the side of the roadway retaining rod through the gangue-blocking support.

2. The hydraulic support for cutting the roof and creating a roadway with rockfill support as described in claim 1, characterized in that, The base and the top beam are connected at one end of the first telescopic column via a protective frame. The protective frame includes a first channel steel and a second channel steel that are nested together. A rock-blocking bracket is provided on the first channel steel.

3. The hydraulic support for cutting the roof and creating a roadway with rockfill support as described in claim 1, characterized in that, The top beam has a front beam at one end corresponding to the second telescopic column, and the end of the top beam has an inner cavity for the front beam to be slidably assembled along its length direction. The inner cavity has a third telescopic column corresponding to the front beam.

4. The hydraulic support for cutting the roof and forming a roadway with rockfill support as described in claim 3, characterized in that, The front beam has a downward-opening mounting groove at its front end, and a side guard plate is hinged to the end of the mounting groove. A fourth telescopic column is hinged between the middle of the side guard plate and the front beam.

5. The hydraulic support for cutting the roof and creating a roadway with rockfill support as described in claim 4, characterized in that, The main body of the side guard plate is a downward-facing groove, and an extension plate is provided at the front end of the side guard plate. The rear end of the top beam is provided with a connection station corresponding to the extension plate.

6. The hydraulic support for cutting the roof and creating a roadway with rockfill support as described in claim 5, characterized in that, The rock-blocking support is a hydraulic cylinder.

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