Filling hydraulic support suitable for two coal mining methods

Abstract

The utility model provides a filling hydraulic support suitable for two coal mining methods, which comprises a front top beam, a rear top beam and a base, and the front top beam and the rear top beam are detachably hinged; the base comprises a front base body and a rear base body, and the front base body and the rear base body are detachably connected. A front stand column and a connecting rod assembly are arranged between the front top beam and the front base, the connecting rod assembly comprises a shield beam, the shield beam is hinged to the rear end of the front top beam, and a rear stand column and a plugging device are arranged between the rear top beam and the rear base. The detachable rear top beam and the rear base are adopted, and a four-column type filling method hydraulic support can be converted into a double-column type caving method hydraulic support; when the rear top beam and the rear base are not detached, the hydraulic support can be used as a four-column filling method hydraulic support or a four-column caving method hydraulic support, the equipment type investment of the coal face is reduced, and high-yield and high-efficiency production of the coal face is achieved.

Description

Technical Field

[0001] This utility model relates to a filling hydraulic support, specifically, to a filling hydraulic support applicable to two coal mining methods. Background Technology

[0002] In coal mining, caving and backfilling refer to methods for managing the roof of mined-out areas. The caving method involves "replacing support with collapse," while the backfilling method involves "stabilizing with filling." The caving method removes the supports in the mined-out area, allowing the roof to collapse naturally. It is suitable for mining areas with low surface subsidence requirements and greater burial depth, offering advantages such as simple technology and low cost. However, it results in significant surface subsidence and substantial ecological impact. The backfilling method, on the other hand, uses artificial materials (such as paste, gangue, tailings, and binders) to backfill the mined-out area, actively supporting the surrounding rock and controlling ground pressure. It is suitable for mining under buildings, railways, or water bodies, or in scenarios requiring reduced surface subsidence. Although it is more expensive and complex, it significantly reduces environmental damage and achieves intensive resource utilization.

[0003] Hydraulic supports are the key carriers for achieving roof safety control using caving and filling methods. In the caving method, hydraulic supports guide the roof to collapse in stages and in an orderly manner through controllable pressure release, while in the filling method, hydraulic supports provide support space for the formation of artificial filling bodies by stabilizing the roof.

[0004] According to the mine's mining plan, different coal mining processes require corresponding hydraulic supports. Therefore, mines need to stock various types of hydraulic support equipment, such as filling hydraulic supports or caving hydraulic supports.

[0005] The deployment of various types of hydraulic support equipment in coal mining faces can lead to management chaos and reduced coal mining efficiency. Therefore, it is necessary to use a hydraulic support that can be used for both coal mining methods to address this situation. In existing technologies, the four-column filling hydraulic support is generally converted into a four-column caving hydraulic support.

[0006] The problems currently faced by hydraulic supports applicable to both coal mining methods are as follows: First, when it is necessary to convert a four-column filling hydraulic support into a two-column caving hydraulic support, the structural limitations of the four-column filling hydraulic support make it too different from the two-column hydraulic support, making it difficult to convert to a two-column caving hydraulic support. There is currently no such existing technology. Second, when it is necessary to convert a four-column filling hydraulic support into a four-column caving hydraulic support, the rear top beam (tail beam) is usually swung downwards as a rock-blocking plate. At this time, the filling and sealing device installed on the rear base of the hydraulic support will interfere with the downward swing of the rear top beam, affecting the maximum downward swing angle of the rear top beam and increasing the back rock of the rear top beam.

[0007] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0008] The purpose of this utility model is to address the shortcomings of existing technologies by providing a filling hydraulic support applicable to two coal mining methods. It can be converted from a four-column filling hydraulic support to a two-column caving hydraulic support. When converting from a four-column filling hydraulic support to a four-column caving hydraulic support, the downward swing range of the rear top beam can be increased.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes a front top beam, a rear top beam, and a base, wherein the front top beam and the rear top beam are detachably hinged; the base includes a front base and a rear base, which are detachably connected; a front column and a connecting rod assembly are provided between the front top beam and the front base, the connecting rod assembly including a shield beam, the shield beam being hinged to the rear end of the front top beam; and a rear column and a sealing device are provided between the rear top beam and the rear base.

[0010] Based on the above, the sealing device is hinged to the rear end of the rear base, and a swing jack is provided between the sealing device and the rear base. The swing jack retracts to drive the sealing device to rotate toward the rear base.

[0011] Based on the above, when the front column extends, the rear column retracts, and the swing jack retracts, the rear top beam effectively shields the sealing device and the protective beam.

[0012] Based on the above, the rear end of the front top beam is provided with a rear top beam hinge seat and a shield beam hinge seat. The rear top beam hinge seat is located on the upper side of the shield beam hinge seat, and the shield beam hinge seat is located on the front side of the rear top beam hinge seat.

[0013] Based on the above, the rear top beam hinge seat is also used to install a rock-blocking inclined plate, which is used to protect the rear top beam hinge seat and is erected on the shield beam.

[0014] This utility model also provides a filling hydraulic support applicable to two coal mining methods: it includes a front top beam, a rear top beam, a base, and a sealing device. The front top beam and the rear top beam are hinged together. The front top beam is connected to the base through a front column and a connecting rod assembly. The rear top beam is connected to the base through a rear column. The sealing device is hinged to the rear end of the base. A swing jack is provided between the sealing device and the base. The swing jack retracts to drive the sealing device to rotate toward the base.

[0015] Based on the above, when the front column extends, the rear column retracts, and the swing jack retracts, the rear top beam effectively shields the sealing device.

[0016] Based on the above, the base and / or the sealing device are provided with ear-type supports, and the sealing device and the base are hinged together by the ear-type supports to reduce the storage angle when the sealing device is rotated and folded.

[0017] Based on the above, the sealing device includes a sealing base and a primary baffle. The primary baffle is slidably disposed within the sealing base, and a primary telescopic jack is provided between the primary baffle and the sealing base.

[0018] Based on the above, the sealing device further includes a secondary baffle, which is slidably disposed within the primary baffle, and a secondary telescopic jack is provided between the secondary baffle and the primary baffle.

[0019] This invention represents a substantial improvement over existing technologies. Specifically, it employs a detachable rear top beam and rear base. When the rear top beam and rear base are removed, the shield beam functions as a force-transmitting and rock-blocking element, transforming the four-column filling hydraulic support into a two-column caving hydraulic support. Without removing the rear top beam and rear base, the hydraulic support can be used as a four-column filling hydraulic support thanks to the front and rear columns and the sealing device. Without removing the rear top beam and rear base, lowering the rear column causes the rear top beam to swing downwards, effectively blocking rock, further transforming the four-column filling hydraulic support into a four-column caving hydraulic support. Therefore, this hydraulic support is suitable for both filling and caving mining methods, as well as two sub-types of caving (two-column and four-column), reducing equipment investment in coal mining faces and facilitating high-yield and high-efficiency production.

[0020] Furthermore, when converting the four-column filling hydraulic support to a four-column caving hydraulic support, a sealing device that can rotate and fold towards the base is adopted. After the sealing device rotates towards the base at a certain angle, the sealing device will reduce its height on the base, thus avoiding interference with the downward swing of the rear top beam, increasing the maximum swing angle of the rear top beam, effectively utilizing the back grit blocking function of the rear top beam, and enabling the rear top beam to fully play its role in guiding the grit, so that the grit collapses and accumulates more evenly in the goaf area, preventing grit from splashing onto the working face area, reducing the impact of grit, and reducing the back grit on the rear top beam.

[0021] Meanwhile, the rear top beam hinge seat is located on the rear and upper side of the shield beam hinge seat. Based on the shield beam's own tilt angle, it will provide sufficient space for the downward swing of the rear top beam, allowing the rear top beam to effectively shield the shield beam without interfering with it. The ear-type support reduces the storage angle when the sealing device rotates and folds, reducing the height of the sealing device on the base and providing sufficient space for the downward swing of the rear top beam, allowing the rear top beam to effectively shield the sealing device without interfering with it. The sealing device includes one or more telescopic baffles, which can effectively reduce the space occupied by the sealing device. The above-mentioned structures increase the maximum swing angle of the rear top beam, which is conducive to the rear top beam's role in blocking slag. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the hydraulic support of this utility model applied to the filling method;

[0023] Figure 2 This is a schematic diagram of the first structural design of the hydraulic support of this utility model applied to the caving method;

[0024] Figure 3 This is a schematic diagram of the second structure of the hydraulic support of this utility model applied to the caving method;

[0025] Figure 4 yes Figure 1 A three-dimensional structural breakdown diagram;

[0026] Figure 5 yes Figure 4 Exploded view of the rear base and sealing device;

[0027] Figure 6 This is a three-dimensional structural schematic diagram of the sealing device of this utility model when it is unfolded;

[0028] Figure 7 yes Figure 3 A three-dimensional structural breakdown diagram;

[0029] In the figure, the attached reference numerals are:

[0030] Front top beam 11, rear top beam hinge seat 111, rear top beam 12;

[0031] Base 2, front base 21, rear base 22;

[0032] Front post 41, rear post 42;

[0033] Linkage assembly 5, shield beam 51;

[0034] The sealing device 3, the swing jack 31, the sealing base 32, the first-stage baffle 331, the second-stage baffle 332, the first-stage telescopic jack 341, and the second-stage telescopic jack 342.

[0035] Waste-blocking inclined plate 6. Detailed Implementation

[0036] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0037] Example 1

[0038] like Figures 1-7 As shown, the filling hydraulic support applicable to two coal mining methods in this embodiment includes a front top beam 11, a rear top beam 12, and a base 2. The front top beam 11 and the rear top beam 12 are detachably hinged. The base 2 includes a front base 21 and a rear base 22, which are detachably connected. A front column 41 and a connecting rod assembly 5 are provided between the front top beam 11 and the front base 21. The connecting rod assembly 5 includes a shield beam 51. A rear column 42 and a sealing device 3 are provided between the rear top beam 12 and the rear base 22.

[0039] Generally, the linkage assembly 5 includes a front linkage, a rear linkage, an upper linkage, and a balance jack. The front linkage and the rear linkage are existing technologies and will not be described in detail here. In this embodiment, the upper linkage is a shield beam 51. The balance jack maintains the balance of the front top beam 11 and enhances the load-bearing capacity of the hydraulic support when the front column 41 extends and retracts.

[0040] Based on the above, such as Figure 4 As shown, the hydraulic support in this embodiment can be divided into two parts as needed. The front part includes a front top beam 11, a front base 21, a front column 41, and a connecting rod assembly 5. The rear part includes a rear top beam 12, a rear base 22, a rear column 41, and a sealing device 3. Figure 3 As shown, after the rear half is removed, the front half can be used independently as a double-column collapse hydraulic support.

[0041] Based on the above, such as Figure 1 As shown, when the front and rear halves of the hydraulic support in this embodiment are connected together, it can be used as a four-column filling hydraulic support. For example, the front column 41 and the rear column 42 extend to allow the front top beam 11 and the rear top beam 12 to effectively support the roof. By stabilizing the roof, it provides support space for the artificial filling material to form. The sealing device 3 set between the rear top beam 12 and the rear base 22 can effectively seal the goaf area and prevent the filling material (such as paste or gangue) from entering the working face area. At the same time, the sealing device 3 can also support the rear top beam 12 and reduce subsidence.

[0042] Based on the above, such as Figure 2As shown, when the front and rear halves of the hydraulic support in this embodiment are connected together, it can also be used as a four-column collapse hydraulic support. For example, the front column 41 extends and the rear column 42 retracts. Since the front top beam 11 and the rear top beam 12 are hinged together, the rear top beam 12 will be driven to swing downward by the rear column 42. The rear top beam 12 will be used as an inclined gangue baffle, which is beneficial to optimize the guidance of gangue, so that the gangue collapses and accumulates more evenly in the goaf area, prevents gangue from splashing into the working face area, reduces the impact of gangue, and reduces the gangue backing of the rear top beam.

[0043] Based on the above, such as Figure 3 As shown, when the rear half of the hydraulic support in this embodiment is removed, the front half can be used independently as a double-column caving hydraulic support. In order to ensure that the front half has a basic rock-blocking function when used as a caving hydraulic support, the linkage assembly 5 also includes a shield beam 51. The shield beam 51 is used as the upper link of the linkage assembly 5 (the upper link is used to hinge the front and rear links and the top beam) to transmit force downward. The shield beam 51 is hinged to the rear end of the front top beam 11 to shield the front base 21, so that the shield beam 51 is inclinedly set on the upper side of the front base 21 as a rock-blocking plate. This is beneficial to optimize the guidance of the rock, so that the rock collapses and accumulates more evenly in the goaf area, prevents the rock from splashing into the working face area, reduces the impact of the rock, and reduces the back rock of the rear top beam.

[0044] In this embodiment, a detachable rear top beam 12 and rear base 22 are used. A shield beam 51 is set at the rear end of the front top beam 11 to play the role of force transmission and rock blocking. This can transform the four-column filling method hydraulic support into a two-column caving method hydraulic support. When the rear top beam 12 and rear base 22 are not removed, the hydraulic support itself can be used as a four-column filling method hydraulic support. Moreover, by lowering the rear column 42, the rear top beam 12 can play the role of rock blocking, and the hydraulic support itself can also be used as a four-column caving method hydraulic support. Therefore, the hydraulic support of this embodiment is applicable to the two coal mining methods of filling and caving, as well as the two sub-types of caving (two-column and four-column), which is conducive to reducing the investment in equipment types in the coal mining face and to achieving high-yield and high-efficiency production in the coal mining face.

[0045] Example 2

[0046] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 As shown, the filling hydraulic support applicable to two coal mining methods in this embodiment includes a front top beam 11, a rear top beam 12, a base 2, and a sealing device 3. The front top beam 11 and the rear top beam 12 are hinged together. The front top beam 11 is connected to the base 2 through a front column 41 and a connecting rod assembly 5. The rear top beam 12 is connected to the base 2 through a rear column 42.

[0047] The hydraulic support in this embodiment is similar to that in Embodiment 1. Since the front top beam 11 and the rear top beam 12 are hinged, the swing of the rear top beam 12 can be controlled by the extension and retraction of the rear column 42. When the rear top beam 12 is parallel to the front top beam 11, it can be used as a four-column filling hydraulic support; when the rear top beam 12 swings downward, it can be used as a four-column collapse hydraulic support; moreover, when a shield beam 51 is provided and the front and rear halves of the hydraulic support can be separated, it can be used as a two-column collapse hydraulic support.

[0048] Optionally, when the hydraulic support in this embodiment is not required to be used as a double-column collapse hydraulic support (i.e., when the front and rear halves do not need to be separated), the base 2 can be used as an integral base, without the need to set the front base 21 and the rear base 22, and there is no need to equip the connecting rod assembly 5 with the shield beam 51, and the upper connecting rod can be used.

[0049] The difference between this embodiment and Embodiment 1 is that, when used as a four-column collapse hydraulic support, to prevent the sealing device 3 located at the rear end of the base 2 from interfering with the downward swing of the rear top beam 12, thereby affecting the maximum swing angle of the rear top beam 12, as follows: Figure 4 , Figure 5 As shown, in this embodiment, the sealing device 3 is hinged to the rear end of the base 2. A swing jack 31 is provided between the sealing device 3 and the base 2. The swing jack 31 retracts to drive the sealing device 3 to rotate toward the base 2. Thus, after the sealing device 3 rotates and folds toward the base 2 at a certain angle, the sealing device 3 will reduce its height on the base 2, thereby avoiding interference with the downward swing of the rear top beam 12, increasing the maximum swing angle of the rear top beam 12, effectively utilizing the back rock blocking function of the rear top beam 12, and helping the rear top beam 12 to fully play its role in optimizing the guidance of back rock, so that the back rock collapses and accumulates more evenly in the goaf area, preventing back rock from splashing onto the working face area, reducing the impact of back rock, and reducing the back rock on the rear top beam.

[0050] Optionally, such as Figure 1 As shown, the swing jack 31 extends to support the sealing device 3 at a certain angle on the base 2 (such as perpendicular to or nearly perpendicular to the base 2) to increase the structural strength of the sealing device 3 when sealing and filling the body; to achieve this functionality, the two ends of the swing jack 31 are respectively connected to the base 2 and the sealing device 3, and the swing jack 31, the base 2 and the sealing device 3 form a triangular structure. When the swing jack 31 extends and retracts, the base 2 and the sealing device 3 rotate relative to each other.

[0051] Example 3

[0052] Based on Example 1 or Example 2, this example can work together with Example 4.

[0053] When the hydraulic support in this embodiment is used as a four-column collapse hydraulic support, when the front column 41 extends, the rear column 42 retracts, and the swing jack 31 retracts, the rear top beam 12 is driven by the rear column 42 to swing downward. The rear top beam 12 effectively shields the protective beam 51, allowing the rear top beam 12 to fully play its role in optimizing the guidance of the gangue. This places certain requirements on the overall structural design of the hydraulic support, which requires preventing the protective beam 51 from interfering with the downward swing of the rear top beam 12.

[0054] Based on the above, both the rear top beam 12 and the shield beam 51 are hinged to the rear end of the front top beam 11. To prevent the rear top beam 12 from interfering with the shield beam 51 when it swings downwards, and to effectively increase the maximum downward swing angle of the rear top beam 12, in this embodiment, as follows... Figure 4 As shown, the rear end of the front top beam 11 is provided with a rear top beam hinge seat 111 and a shield beam hinge seat. The rear top beam 12 is hinged to the front top beam 11 through the rear top beam hinge seat 111, and the shield beam 51 is hinged to the front top beam 11 through the shield beam hinge seat. The rear top beam hinge seat 111 is located on the upper side of the shield beam hinge seat, and the shield beam hinge seat is located on the front side of the rear top beam hinge seat 111.

[0055] Thus, when the front column 41 extends, the shield beam 51 will have a certain tilt angle (used as an upper connecting rod). Based on the tilt angle of the shield beam 51, the rear top beam hinge seat 111 is located on the outside and above the shield beam 51, which will reserve sufficient space for the downward swing of the rear top beam 12. The rear top beam 12 can effectively shield the shield beam 51 and will not interfere with the shield beam 51, increasing the maximum swing angle of the rear top beam 12 and effectively playing the role of blocking the debris.

[0056] Example 4

[0057] Based on Example 2, this example can work together with Example 3.

[0058] When the hydraulic support in this embodiment is changed from a four-column filling hydraulic support to a four-column collapse hydraulic support, when the front column 41 extends, the rear column 42 retracts, and the swing jack 31 retracts, the rear top beam 12 is driven by the rear column 42 to swing downward. The rear top beam 12 effectively shields the sealing device 3, so that the rear top beam 12 can fully play the role of optimizing the guidance of gangue. This puts forward certain requirements on the overall structural design of the hydraulic support, and it is necessary to prevent the sealing device 3 from interfering with the downward swing of the rear top beam 12.

[0059] Based on the above, such as Figure 5As shown, the base 2 (rear base 22) and / or the sealing device 3 are provided with ear-type supports, that is, one of the base 2 and the sealing device 3 is provided with ear-type supports, or both are provided with ear-type supports; the sealing device 3 and the base 2 are hinged together by the ear-type supports, and the ear-type supports extend outward. This structure can prevent the sealing device 3 and the base 2 from interfering with the rotation of the sealing device 3, and provide sufficient space for the rotation of the sealing device 3 to increase the maximum rotation range (maximum folding range) of the sealing device 3, so as to reduce the storage angle when the sealing device 3 is folded.

[0060] like Figure 5 As shown, when the base 2 is provided with an ear-type support, it is a base ear-type support 23, and when the sealing device 3 is provided with an ear-type support, it is a sealing ear-type support 35. Optionally, the base ear-type support 23 is inclined to the rear and upward, and the sealing ear-type support 35 is located at the upper part of the bottom of the sealing device 3. This will help reduce the storage angle when the sealing device 3 is folded.

[0061] Thus, by using an ear-type support to reduce the folding angle of the sealing device 3, the sealing device 3 can be folded towards the base 2 at a greater angle. The sealing device 3 will minimize its height on the base 2, thereby providing sufficient space for the downward swing of the rear top beam 12. The rear top beam 12 can effectively shield the sealing device 3 without interfering with it, increasing the maximum swing angle of the rear top beam 12 and effectively playing the role of blocking the debris.

[0062] Example 5

[0063] Based on the above embodiments, such as Figure 6 As shown, the blocking device 3 may include several levels of telescopic baffles, such as a first-level telescopic baffle, a second-level telescopic baffle, or more levels of telescopic baffles.

[0064] When the sealing device 3 includes a primary telescopic baffle, the sealing device 3 includes a sealing base 32, a primary baffle 331, and a primary telescopic jack 341. The primary baffle 331 is slidably disposed within the sealing base 32, and the two ends of the primary telescopic jack 341 are respectively connected to the primary baffle 331 and the sealing base 32. The primary telescopic jack 341 drives the primary baffle 331 to slide upwards from within the sealing base 32.

[0065] When the sealing device 3 includes a secondary telescopic baffle, based on the structure of the primary telescopic baffle, the sealing device 3 also includes a secondary baffle 332 and a secondary telescopic jack 342. The secondary baffle 332 is slidably disposed within the primary baffle 331. The two ends of the secondary telescopic jack 342 are respectively connected to the secondary baffle 332 and the primary baffle 331. The secondary telescopic jack 342 drives the secondary baffle 332 to slide upward from within the primary baffle 331.

[0066] When the blocking device 3 includes more levels of telescopic baffles, its structure is similar to that of a two-level telescopic baffle, and will not be described in detail here.

[0067] The sealing device 3 may include several levels of telescopic baffles. When the multi-level telescopic baffles of the sealing device 3 are retracted, the space occupied by the sealing device 3 can be effectively reduced. When the hydraulic support in this embodiment is changed from a four-column filling hydraulic support to a four-column collapse hydraulic support, sufficient space can be reserved for the downward swing of the rear top beam 12.

[0068] Example 6

[0069] Based on Example 3, such as Figure 7 As shown, when the hydraulic support in this embodiment is used as a double-column collapse hydraulic support, the rear top beam hinge seat 111 is also used to install the rock-blocking inclined plate 6. When the rock-blocking inclined plate 6 is installed on the rear top beam hinge seat 111, it will protect the rear top beam hinge seat 111, preventing the rock from falling and damaging the rear top beam hinge seat 111, and also preventing the rock from getting stuck in the rear top beam hinge seat; the rock-blocking inclined plate 6 is erected on the protective beam 51, and together with the protective beam 51, it plays the role of blocking rock.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A hydraulic support for two coal mining methods, characterized in that, The application relates to a movable roof support device, which comprises a front roof beam (11), a rear roof beam (12) and a base (2), the front roof beam (11) and the rear roof beam (12) being detachably hinged, the base (2) comprising a front base (21) and a rear base (22), the front base (21) and the rear base (22) being detachably connected, a front stand (41) and a connecting rod assembly (5) being arranged between the front roof beam (11) and the front base (21), the connecting rod assembly (5) comprising a shield beam (51), the shield beam (51) being hinged to the rear end of the front roof beam (11), a rear stand (42) and a blocking device (3) being arranged between the rear roof beam (12) and the rear base (22).

2. The hydraulic support for two coal mining methods according to claim 1, characterized in that, The blocking device (3) is hinged to the rear end of the rear base (22), a swing jack (31) being arranged between the blocking device (3) and the rear base (22), the swing jack (31) being retracted to drive the blocking device (3) to rotate towards the rear base (22).

3. The hydraulic support for two coal mining methods according to claim 2, characterized in that, When the front stand (41) is extended, the rear stand (42) is retracted and the swing jack (31) is retracted, the rear roof beam (12) effectively shields the blocking device (3) and the shield beam (51).

4. The hydraulic support suitable for two coal mining methods according to claim 1 or 2 or 3, characterized in that, The rear end of the front roof beam (11) is provided with a rear roof beam hinging seat (111) and a shield beam hinging seat, the rear roof beam hinging seat (111) being arranged on the upper side of the shield beam hinging seat, and the shield beam hinging seat being arranged on the front side of the rear roof beam hinging seat (111).

5. The hydraulic support suitable for two coal mining methods according to claim 4, characterized in that, The rear roof beam hinging seat (111) is also used for mounting a gangue blocking inclined plate (6), the gangue blocking inclined plate (6) being used for protecting the rear roof beam hinging seat (111), and the gangue blocking inclined plate (6) being arranged on the shield beam (51).

6. A hydraulic support for two coal mining methods, characterized in that, The application relates to a movable roof support device, which comprises a front roof beam (11), a rear roof beam (12), a base (2) and a blocking device (3), the front roof beam (11) and the rear roof beam (12) being hinged, the front roof beam (11) being connected with the base (2) through a front stand (41) and a connecting rod assembly (5), the rear roof beam (12) being connected with the base (2) through a rear stand (42), the blocking device (3) being hinged to the rear end of the base (2), a swing jack (31) being arranged between the blocking device (3) and the base (2), and the swing jack (31) being retracted to drive the blocking device (3) to rotate towards the base (2).

7. The hydraulic support for two coal mining methods according to claim 6, characterized in that, When the front stand (41) is extended, the rear stand (42) is retracted and the swing jack (31) is retracted, the rear roof beam (12) effectively shields the blocking device (3).

8. The powered hydraulic support suitable for two coal mining methods according to claim 2 or 3 or 6 or 7, characterized in that, Ears are arranged on the base (2) and / or the blocking device (3), the blocking device (3) and the base (2) being hinged through the ears to reduce the storage angle when the blocking device (3) is rotated and folded.

9. The powered support as claimed in claim 1 or 2 or 3 or 6 or 7, characterized in that, The blocking device (3) comprises a blocking base (32) and a first baffle (331), the first baffle (331) being slidingly arranged in the blocking base (32), and a first telescopic jack (341) being arranged between the first baffle (331) and the blocking base (32).

10. The hydraulic support suitable for two coal mining methods according to claim 9, characterized in that, The occlusion device (3) further comprises a secondary baffle (332) which is slidingly arranged in the primary baffle (331), and a secondary telescopic jack (342) is arranged between the secondary baffle (332) and the primary baffle (331).

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