Large-mining-height hydraulic support with telescopic gangue blocking plate for coal mine

Abstract

The utility model provides a coal mine large mining height hydraulic support with a telescopic gangue blocking plate, which comprises a support base, a support oil cylinder arranged on the support base and a top beam arranged on the support oil cylinder, a top beam side protection plate is arranged on one side of the top beam, and the lower end of the top beam side protection plate is connected with a telescopic side gangue blocking plate assembly. The telescopic side gangue blocking plate assembly comprises a front primary fixed side gangue blocking plate and a telescopic side gangue blocking plate, and the telescopic side gangue blocking plate is in sliding fit with the front primary fixed side gangue blocking plate through a telescopic beam jack; and in the extending state, one end of the telescopic side gangue blocking plate exceeds the front end of the top beam. According to the large-mining-height hydraulic support with the telescopic waste rock blocking plate for the coal mine, the size of the waste rock blocking plate is increased, the supporting range is widened, and supporting safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of coal mine hydraulic supports, in particular to a large mining height hydraulic support with a telescopic gangue baffle for coal mines. Background Art

[0002] For large mining height working faces, due to the difference between the tunnel height and the working face height, large side transition hydraulic supports will be arranged at the head and tail of the machine to support the top and lateral coal walls of the tunnel to avoid roof falls. At present, the side gangue plates of the mainstream large side transition hydraulic supports on the market do not completely support the exposed lateral coal walls in order to avoid the travel path of the coal mining machine drum, resulting in the space near the front of the top beam not being supported, posing a safety hazard of gangue leakage and gangue spalling. At the same time, the existing side gangue retaining device lacks a left-right fixing method, and is simply hinged together with a pin shaft and an ear plate. It is easy to swing left and right with the hinge point of the side guard plate as the center, which can easily cause unnecessary personal injury. Moreover, the gangue plates of the existing side gangue retaining device are of fixed shape and do not have a telescopic function, and the area of ​​the side gangue support cannot be adjusted at any time.

[0003] The utility model patent with the authorization announcement number CN212003235U discloses a large mining height hydraulic support for coal mines with a retractable gangue baffle, which is used for retractable gangue support on the gravel side of the goaf of the goaf-side tunnel. The gangue baffle includes a base and a lifting frame. The base is connected to the working face hydraulic support. A retractable sleeve matching structure is provided between the base and the lifting frame. A hydraulic column is provided between the lifting frame and the base. The lifting and lowering of the lifting frame is achieved by pressurizing and unloading the hydraulic column. The large mining height hydraulic support for coal mines with a retractable gangue baffle is suitable for tunnels of different heights and can generate vertical support force to prevent excessive empty tops on the roof. However, the size and support range of the large mining height hydraulic support for coal mines with a retractable gangue baffle are relatively small. Utility Model Content

[0004] In order to increase the support area and improve the supporting effect of gangue retaining, the technical solution adopted by the utility model is: a large mining height hydraulic support for coal mines with a telescopic gangue retaining plate, comprising a support base, a support cylinder arranged on the support base, and a top beam arranged on the support cylinder, a top beam side guard plate is provided on one side of the top beam, and the lower end of the top beam side guard plate is connected to the telescopic side gangue retaining plate assembly;

[0005] The telescopic side baffle assembly includes a front first-level fixed side baffle and a telescopic side baffle, and the telescopic side baffle is slidably matched with the front first-level fixed side baffle via a telescopic beam jack;

[0006] In the extended state, one end of the telescopic side slag baffle is arranged beyond the front end of the top beam.

[0007] Based on the above, in order to increase the support range, the lower end of the top beam side guard plate is also connected to a rear fixed side guard plate, and the rear fixed side guard plate is connected to the rear of the telescopic side guard plate assembly.

[0008] Based on the above, the lower end of the telescopic side baffle is connected to the front secondary fixed side baffle, and the lower end of the front secondary fixed side baffle is connected to the front tertiary fixed side baffle.

[0009] Based on the above, the rear fixed side baffle plate and the top beam side guard plate, the front first-level fixed side baffle plate and the top beam side guard plate, the front second-level fixed side baffle plate and the front first-level fixed side baffle plate, and the front third-level fixed side baffle plate and the front second-level fixed side baffle plate are respectively movably connected through ear shafts.

[0010] Based on the above, in order to ensure that the gangue baffle is always close to the coal wall and vertically downward, side gangue jacks are respectively provided between the rear fixed side gangue baffle and the top beam side guard plate, and between the front first-level fixed side gangue baffle and the top beam side guard plate.

[0011] Based on the above, in order to increase structural stability, the length of the front first-level fixed side baffle is greater than the length of the telescopic side baffle.

[0012] Based on the above, in order to increase structural stability, the width of the front first-level fixed side baffle is greater than the width of the telescopic side baffle.

[0013] Based on the above, in order to increase structural stability, the length of the front first-level fixed side baffle is greater than the length of the front second-level fixed side baffle.

[0014] Based on the above, the length of the front secondary fixed side baffle is equal to the length of the front tertiary fixed side baffle.

[0015] Based on the above, the front end of the top beam is also connected to an end support plate.

[0016] The present invention has substantial features and advancements over the prior art. Specifically, the present invention provides a high-mining hydraulic support for coal mines with a telescopic gangue plate. A telescopic side gangue plate assembly, a rear fixed side gangue plate, a front secondary fixed side gangue plate, a front tertiary fixed side gangue plate, and a side gangue jack are respectively arranged on the side of the support. The telescopic side gangue plate assembly is connected to the top beam side guard plate via the side gangue jack and the ear shaft, so that the vertical angle of the side guard plate can be adjusted using the side gangue jack. The front secondary fixed side gangue plate is connected to the front tertiary fixed side gangue plate via the ear shaft, and the vertical angle between the two is also controlled by the side gangue jack. The rear fixed side gangue plate is connected to the top beam side guard plate via the side gangue jack and the ear shaft, and is responsible for gangue blocking on the lateral side of the rear of the top beam. This increases the size of the gangue plate and the support range.

[0017] At the same time, by arranging a telescopic beam jack on the telescopic side rock guard plate assembly, the rear of the jack is connected to the fixed side rock guard plate, and the front of the jack is connected to the telescopic side rock guard plate, the telescopic function of the rock guard plate can be realized by controlling the extension and retraction of the telescopic beam jack, thereby improving the support capacity.

[0018] Therefore, the high-mining hydraulic support with telescopic gangue retaining plates provided by the utility model for coal mines has a telescopic function, which provides a larger support area and more flexible support methods than the original fixed structure, and has a better gangue retaining effect. In addition, the high-mining hydraulic support with telescopic gangue retaining plates provided by the utility model for coal mines has two sets of side gangue retaining jacks added to the original structure, which can ensure that the gangue retaining plates are always close to the coal wall and vertically downward. Even if the coal slag is chipped or the gangue leaks, it will not intrude into the pedestrian space, thereby improving the safety of underground workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side structural schematic diagram of the utility model.

[0020] Figure 2 It is a partial structural diagram of the utility model.

[0021] Figure 3 It is a schematic diagram of the utility model in a state where the slag baffle plate has not been extended.

[0022] Figure 4 It is a schematic diagram of the utility model showing the gangue baffle in an extended state.

[0023] In the figure: 1. Top beam; 2. Top beam side guard plate; 3. Telescopic side guard plate assembly; 4. Rear fixed side guard plate; 5. Front second-level fixed side guard plate; 6. Front third-level fixed side guard plate; 7. Side guard plate jack; 8. Front first-level fixed side guard plate; 9. Telescopic beam jack; 10. Telescopic side guard plate; 11. Bracket base; 12. Bracket cylinder; 13. End support plate. DETAILED DESCRIPTION

[0024] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0025] Example 1

[0026] This embodiment provides a large mining height hydraulic support for coal mines with a telescopic gangue baffle. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, it includes a support base 11, a support cylinder 12 provided on the support base 11, and a top beam 1 provided on the support cylinder 12. A top beam side guard plate 2 is provided on one side of the top beam 1, and a telescopic side slag plate assembly 3 is connected to the lower end of the top beam side guard plate 2.

[0027] The telescopic side guard assembly 3 includes a front primary fixed side guard 8 and a telescopic side guard 10. The telescopic side guard 10 slides with the front primary fixed side guard 8 via a telescopic beam jack 9. When extended, one end of the telescopic side guard 10 extends beyond the front end of the top beam 1.

[0028] In this embodiment, to increase the support range, the lower end of the top beam side guard plate 2 is further connected to a rear fixed side guard plate 4. The rear fixed side guard plate 4 is connected to the rear of the telescopic side guard plate assembly 3. The lower end of the telescopic side guard plate 10 is connected to the front secondary fixed side guard plate 5, and the lower end of the front secondary fixed side guard plate 5 is connected to the front tertiary fixed side guard plate 6.

[0029] Example 2

[0030] This embodiment provides a large mining height hydraulic support for coal mines with a telescopic gangue baffle. The main difference from Example 1 is that in this embodiment: the rear fixed side gangue baffle 4 and the top beam side guard plate 2, the front first-level fixed side gangue baffle 8 and the top beam side guard plate 2, the front second-level fixed side gangue baffle 5 and the front first-level fixed side gangue baffle 8, and the front third-level fixed side gangue baffle 6 and the front second-level fixed side gangue baffle 5 are respectively movably connected through ear shafts.

[0031] In order to ensure that the gangue baffle is always close to the coal wall and vertically downward, side gangue jacks 7 are respectively provided between the rear fixed side gangue baffle 4 and the top beam side guard plate 2, and between the front first-level fixed side gangue baffle 8 and the top beam side guard plate 2.

[0032] Example 3

[0033] This embodiment provides a high-mining height hydraulic support for coal mines with telescopic gangue baffles. The main difference from Embodiment 1 is that, in this embodiment, to increase structural stability, the length of the front primary fixed side gangue baffles 8 is greater than the length of the telescopic side gangue baffles 10. The width of the front primary fixed side gangue baffles 8 is greater than the width of the telescopic side gangue baffles 10.

[0034] Example 4

[0035] This embodiment provides a large mining height hydraulic support for coal mines with a telescopic gangue retaining plate. The main difference from Embodiment 1 is that in this embodiment: the front end of the top beam is further connected to an end support plate 13.

[0036] Example 5

[0037] This embodiment provides a high-mining height hydraulic support for coal mines with retractable gangue baffles. The main difference from Embodiment 1 is that, in this embodiment, to increase structural stability, the length of the front primary fixed side gangue baffles 8 is greater than the length of the front secondary fixed side gangue baffles 5. The length of the front secondary fixed side gangue baffles 5 is equal to the length of the front tertiary fixed side gangue baffles 6.

[0038] Specifically, the utility model provides a high-mining height hydraulic support for coal mines with a retractable gangue plate. The gangue retaining portion consists of two parts. The first part consists of a top beam 1 and a top beam side guard plate 2. The second part consists of a retractable side gangue plate assembly 3, a rear fixed side gangue plate 4, a front secondary fixed side gangue plate 5, a front tertiary fixed side gangue plate 6, and a side gangue jack 7. The retractable side gangue plate assembly 3 is connected to the top beam side guard plate 2 via the side gangue jack 7 and the ear shaft. The side gangue jack 7 adjusts the vertical angle of the side guard plate by controlling the extension and retraction of the jack.

[0039] During normal coal mining, when the shearer drum moves away from the large side slab transition support, the telescopic beam jacks of the telescopic side slab assembly extend, driving the telescopic side slabs to extend and laterally support the coal wall of the roadway to prevent slab leakage and slab spalling. When the shearer drum approaches the large side slab transition support, the telescopic beam jacks of the telescopic side slab assembly retract, driving the telescopic side slabs to retract and prevent collision between the shearer drum and the side slab device. The shearer drum then extends again after it moves away from the side slab.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A high-mining hydraulic support for coal mines with a telescopic gangue baffle, comprising a support base, a support cylinder disposed on the support base, and a top beam disposed on the support cylinder, characterized in that: A top beam side guard plate is provided on one side of the top beam, and a telescopic side slag plate assembly is connected to the lower end of the top beam side guard plate; The telescopic side baffle assembly includes a front first-level fixed side baffle and a telescopic side baffle, and the telescopic side baffle is slidably matched with the front first-level fixed side baffle via a telescopic beam jack; In the extended state, one end of the telescopic side slag baffle is arranged beyond the front end of the top beam.

2. The large mining height hydraulic support with a telescopic gangue baffle for coal mines according to claim 1 is characterized in that: The lower end of the top beam side guard plate is also connected to a rear fixed side baffle plate, and the rear fixed side baffle plate is connected to the rear of the telescopic side baffle plate assembly.

3. The large mining height hydraulic support with a telescopic gangue baffle for coal mines according to claim 2 is characterized in that: The lower end of the telescopic side baffle is connected to the front secondary fixed side baffle, and the lower end of the front secondary fixed side baffle is connected to the front tertiary fixed side baffle.

4. The large mining height hydraulic support with a telescopic gangue baffle for coal mines according to claim 3 is characterized in that: The rear fixed side baffle plate and the top beam side guard plate, the front first-level fixed side baffle plate and the top beam side guard plate, the front second-level fixed side baffle plate and the front first-level fixed side baffle plate, and the front third-level fixed side baffle plate and the front second-level fixed side baffle plate are respectively movably connected through ear shafts.

5. The large mining height hydraulic support with a telescopic gangue baffle for coal mines according to claim 4 is characterized in that: Side rock guard jacks are also provided between the rear fixed side rock guard plate and the top beam side guard plate, and between the front first-level fixed side rock guard plate and the top beam side guard plate.

6. The large mining height hydraulic support with a telescopic gangue baffle for coal mines according to claim 5 is characterized in that: The length of the front first-level fixed side baffle is greater than the length of the telescopic side baffle.

7. The large mining height hydraulic support with a telescopic gangue baffle for coal mines according to claim 6 is characterized in that: The width of the front first-level fixed side baffle is greater than the width of the telescopic side baffle.

8. The large mining height hydraulic support with a telescopic gangue baffle for coal mines according to claim 7 is characterized in that: The length of the front first-level fixed side baffle is greater than the length of the front second-level fixed side baffle.

9. The large mining height hydraulic support with a telescopic gangue baffle for coal mines according to claim 8, characterized in that: The length of the front secondary fixed side baffle is equal to the length of the front tertiary fixed side baffle.

10. The large mining height hydraulic support with a telescopic gangue baffle for coal mines according to claim 1, characterized in that: The front end of the top beam is also connected to an end support plate.

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