Hydraulic support, hydraulic support wall and gob-side entry retaining method based on hydraulic support wall

Abstract

The hydraulic roof support comprises a blocking beam assembly, a swing oil cylinder and a support beam assembly. The invention also discloses a roof blocking wall which is assembled by a plurality of hydraulic roof supports. The invention further discloses a gob-side entry retaining method based on the roof blocking wall, which comprises sequentially arranging the hydraulic roof supports along the advancing direction of the working face to form the roof blocking wall, and separating the coal mining face into a gob and a gob-side entry retaining roadway. After the coal mining face is mined, the gob-side entry retaining is completed, and the next gob-side entry retaining can be performed in the same way. The hydraulic roof support is combined with the technology of supporting the roof of the roadway and filling the gob, which can effectively control the surface subsidence, cancel the safety coal pillar between the mining faces, simplify the coal mining process system, improve the coal recovery rate, reduce the new excavation engineering quantity of the coal mining, reduce the comprehensive cost of the mine construction, effectively prevent the geological disasters, and protect the ecological environment.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to a hydraulic shield support, a shield retaining wall, and a method for retaining roadways along the goaf based on the shield retaining wall. Background Technology

[0002] like Figure 1-3 As shown, traditional coal mining methods employ a dual-roadway layout for the coal face, consisting of an intake airway and a return airway. For example, in the first working face, there is a first intake airway 1a and a second return airway 1b; in the second working face, there are second intake airways 2a and second return airways 2b. During the arrangement of the subsequent coal mining faces, a safety coal pillar 4 is left between the production working face 3a and the subsequent working face 3b to protect the safety of the subsequent coal mining face roadway excavation. In this process, the width of the coal pillar is generally 15–25 m, which not only causes losses in coal mining but also results in a large amount of excavation work and a long production preparation period.

[0003] To address the aforementioned technical problems, those skilled in the art have proposed using pillarless mining, which involves preserving and maintaining the haulage or return airway of the previous working face adjacent to the goaf as the return or haulage airway for the next working face, without leaving any coal pillars. This is known as goaf-side roadway retention. Support methods for goaf-side roadway retention mainly include masonry wall methods and roadway-side backfilling techniques. Masonry wall methods have drawbacks such as long construction periods and inability to guarantee quality. Currently, roadway-side backfilling techniques mostly use hydraulic single-pole or point-pillar methods to resist the rockfall from the goaf. When implementing goaf-side roadway retention in coal seams above 3m, not only are the costs high, construction difficult, and the workload large, but hydraulic single-pole or point-pillar methods are also ineffective at preventing rockfall, easily leading to collapse, and in severe cases, roof collapse endangering the safety of workers.

[0004] In addition, existing gob-side roadway support methods have drawbacks such as incompatibility of mechanical properties like support resistance and compressibility with the deformation of the surrounding rock, as well as low mechanization. These drawbacks make them unsuitable for fully mechanized longwall mining of steeply inclined coal seams and cannot guarantee the safety of fully mechanized longwall mining of steeply inclined coal seams. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a hydraulic escapement support, an escapement retaining wall, and a method for retaining lanes along the goaf based on the escapement retaining wall. To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0006] The present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a hydraulic armored vehicle support, comprising: a retaining beam assembly and a supporting beam assembly; the retaining beam assembly includes: a retaining beam body, a first adjusting cylinder, and a telescopic retaining beam, the telescopic retaining beam being connected to the retaining beam body via the first adjusting cylinder, the top of the telescopic retaining beam forming a top support end face for supporting the roadway roof; one side of the retaining beam body faces the coal mining face to form a protective plate surface, and the other side is provided with the supporting beam assembly hinged to the retaining beam body; the supporting beam assembly includes: a supporting beam body, a second adjusting cylinder, and a telescopic supporting beam, the telescopic supporting beam being connected to the supporting beam body via the second adjusting cylinder, the bottom of the telescopic supporting beam forming a bottom support end face for contacting the ground.

[0008] Furthermore, the hydraulic armor-piercing support also includes: a swing cylinder; the two ends of the swing cylinder are respectively hinged to the main body of the retaining beam and the main body of the support beam, so that the support beam assembly swings relative to the retaining beam assembly through the swing cylinder.

[0009] Furthermore, a first hollow cavity is formed inside the main body of the retaining beam, the first adjusting oil cylinder and the telescopic retaining beam are disposed in the first hollow cavity, and the top support end face of the telescopic retaining beam extends out from the cavity opening of the first hollow cavity and abuts against the top surface of the roadway.

[0010] Furthermore, the number of the support beam assembly is at least one; the telescopic support beam includes: a base and a support rod disposed on the base; a second hollow cavity adapted to the support rod is opened on the main body of the support beam, and the support rod extends into the second hollow cavity; the bottom of the base serves as the bottom support end face abutting against the ground.

[0011] Furthermore, one end of the retaining beam body is provided with an embedded protrusion, and the other end is provided with an accommodating groove that matches the embedded protrusion.

[0012] Secondly, the present invention also provides a telescopic retaining wall, which is assembled from several hydraulic telescopic supports, such that the protective plate surfaces of each of the retaining beam bodies are spliced ​​together to form the overall protective surface of the roadway, the top support end faces of each of the telescopic retaining beams are arranged along the arrangement direction of the hydraulic telescopic supports to form the roadway top support surface, and the bottom support end faces of each of the telescopic support beams are arranged along the arrangement direction of the hydraulic telescopic supports to form the ground auxiliary support surface.

[0013] Furthermore, the insert protrusions of each of the retaining beam bodies are embedded into the receiving grooves of adjacent retaining beam bodies to assemble the armored retaining wall.

[0014] Thirdly, the present invention also provides a method for retaining lanes along the goaf based on a retaining wall, comprising:

[0015] Hydraulic armor supports are arranged sequentially along the working face advance direction to form armor retaining walls, and the armor retaining walls divide the coal mining face into goaf area and goaf retention roadway, so that the goaf retention roadway is formed behind the mining direction.

[0016] Material was filled into the goaf area;

[0017] After the current working face is mined, the goaf-side roadway will be used as the roadway for the next coal mining face, and the hydraulic armor support will be arranged along the next coal mining face.

[0018] When the hydraulic armored support is arranged along the working face advancing direction, the protective plate surface of the hydraulic armored support faces the coal mining face. At the same time, the length of the retaining beam assembly of the hydraulic armored support is adjusted so that the top support end face of the hydraulic armored support abuts against the top surface of the roadway, and the length of the support beam assembly is adjusted so that the bottom support end face of the support beam assembly abuts against the ground.

[0019] Furthermore, the aforementioned method for retaining a roadway along the goaf based on a retaining wall also includes: when the hydraulic retaining support is arranged along the working face advancing direction, adjusting the angle between the retaining beam assembly and the supporting beam assembly by a swing cylinder, so that the hydraulic retaining support fits against the surrounding rocks in the roadway.

[0020] Furthermore, before arranging the hydraulic armor support along the working face advance direction, the method further includes: setting anchor cables and anchor rods on the top surface of the working face roadway to provide auxiliary support.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The method of using hydraulic shield supports to assemble shield retaining walls for support along the goaf creates a tight and stable rock-blocking surface, effectively preventing rock from falling into the roadway and ensuring a safe production environment;

[0023] 2. The structural design of the hydraulic armored support has the advantage of being able to adjust the stress structure according to the actual roadway conditions, making the support structure more compatible with the roadway environment, thereby ensuring the support stability of the overall structure. In addition, the structural design of this invention makes the armored retaining wall no longer limited by the coal seam height, and can be applied to mining environments with a higher coal seam height range.

[0024] 3. The method of using hydraulic armor-type retaining walls to support the roadway along the goaf has the advantages of simple installation and layout. It is not only low in cost and small in construction, but also easy to disassemble and place in the next mining face after mining is completed. The feature of being reusable and relocatable saves the labor cost of excavating new roadways, reduces the cost of support materials, and improves mining efficiency.

[0025] 4. It simplifies the coal mining process system, eliminates the need for safety coal pillars between the continuous working face and the production working face, improves the coal resource recovery rate, and the combination of the retaining wall assembled by the hydraulic retaining support and the goaf filling can effectively prevent geological disasters and protect the ecological environment.

[0026] 5. The hydraulic armor-like support of the present invention is used to assemble the armor-like retaining wall for support along the goaf. It can be applied to the treatment of surface subsidence in steeply inclined coal seams, effectively preventing large-scale collapse of coal seams or gangue. It can also adjust the support angle according to the spatial environment of the support site to adapt to different support needs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the continuous layout of an existing inclined coal seam working face;

[0029] Figure 2 This is a schematic cross-sectional view of the goaf in an existing inclined coal seam working face.

[0030] Figure 3 A schematic diagram of the continuous layout of existing horizontal coal seam working faces;

[0031] Figure 4 This is a schematic diagram of the layout of the steeply inclined coal mining face according to the present invention;

[0032] Figure 5 This is a schematic diagram of the use of retaining walls for goaf support in the goaf of a steeply inclined coal mining face according to the present invention.

[0033] Figure 6 This is a schematic cross-sectional view of the layout of the steeply inclined coal mining face of the present invention;

[0034] Figure 7 This is a top view schematic diagram of the layout of the steeply inclined coal mining face of the present invention;

[0035] Figure 8 This is a top view schematic diagram of the goaf-side roadway support for the steeply inclined coal mining face according to the present invention;

[0036] Figure 9 This is a schematic diagram of the hydraulic armor-piercing support structure of the present invention;

[0037] Figure 10 This is a schematic diagram of the telescopic retaining beam of the present invention;

[0038] Figure 11 for Figure 10 EE view;

[0039] Figure 12 This is a schematic diagram of the structure of the retaining beam body of the present invention;

[0040] Figure 13 for Figure 12 FF view;

[0041] Figure 14 for Figure 12 HH view;

[0042] Figure 15 This is a schematic diagram of the structure of the supporting beam of the present invention;

[0043] Figure 16 for Figure 15 II-direction view;

[0044] Figure 17 for Figure 15 KK view;

[0045] Figure 18 This is a schematic diagram of the telescopic support beam of the present invention;

[0046] Figure 19 for Figure 18 LL view. Detailed Implementation

[0047] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0048] like Figure 5 , 9 As shown, in some illustrative embodiments, a hydraulic armor support 8 is provided, including: a retaining beam assembly 1, a support beam assembly 2, and a swing cylinder 3.

[0049] The retaining beam assembly 1 and the support beam assembly 2 are hinged together, forming a cross-shaped support structure. The retaining beam assembly 1 provides support, while the support beam assembly 2 supports the retaining beam assembly 1 to maintain stability. The two ends of the swing cylinder 3 are hinged to both the retaining beam assembly 1 and the support beam assembly 2, respectively. This allows the swing cylinder 3 to adjust the opening angle of the retaining beam assembly 1 and the support beam assembly 2 during extension and retraction. This not only ensures that the retaining beam assembly 1, the support beam assembly 2, and the swing cylinder 3 form a stable triangular structure, but also allows for structural adjustment while maintaining overall structural stability to adapt to different support requirements.

[0050] like Figure 5-14 As shown, the retaining beam assembly 1 includes: a retaining beam body 101, a first adjusting cylinder 102, and a telescopic retaining beam 103.

[0051] A first hollow cavity is formed inside the main body 101 of the retaining beam, and the first adjusting cylinder 102 and the telescopic retaining beam 103 are disposed inside the first hollow cavity. The function of the first adjusting cylinder 102 is to push the telescopic retaining beam 103 out of the main body 101 of the retaining beam or pull the telescopic retaining beam 103 back into the main body 101 of the retaining beam when it performs telescopic movement, thereby realizing the extension and shortening of the overall length of the retaining beam assembly 1, and achieving the purpose of adjustable length of the retaining beam assembly 1.

[0052] The specific connection methods of each component within the retaining beam assembly 1 are as follows:

[0053] The telescopic stop beam 103 is connected to the stop beam body 101 via a first adjusting cylinder 102, thereby enabling relative movement between the stop beam body 101 and the telescopic stop beam 103. Specifically, the fixed end of the first adjusting cylinder 102 is connected to a first lug 4a on the stop beam body 101, and the actuating end of the first adjusting cylinder 102 is connected to a second lug 4b on the telescopic stop beam 103. The second lug 4b can be located either at the bottom of the telescopic stop beam 103 or on the beam body of the telescopic stop beam 103. The top of the telescopic stop beam 103 forms a top support end face 1031 for supporting the tunnel top surface 6. In actual application, the first adjusting cylinder 102 uses the first lug 4a as a support point to push the telescopic stop beam 103 out of the opening of the first hollow cavity, so that the top support end face 1031 extends and abuts against the tunnel top surface 6.

[0054] The retaining beam body 101 is a hollow plate-like structure. One side of the retaining beam body 101 faces the coal mining face to form a protective plate surface 1011, and the other side is provided with a third lug 4c and a fourth lug 4d. The third lug 4c is used to hinge with the support beam assembly 2, and the fourth lug 4d is used to hinge with the fixed end of the swing cylinder 3. The swing cylinder 3 extends and retracts with the fourth lug 4d as the fulcrum, pushing the telescopic support beam 203 to swing with the third lug 4c as the hinge point, thereby adjusting the opening and closing angle between the retaining beam assembly 1 and the support beam assembly 2.

[0055] like Figure 15-19 As shown, the support beam assembly 2 includes: a support beam body 201, a second adjusting cylinder 202, and a telescopic support beam 203.

[0056] The number of support beam assemblies 2 is at least one. In specific implementation, only one support beam assembly 2 can be equipped on the rear surface of the retaining beam assembly 1. In this case, the main body 201 of the support beam can be designed as a plate structure to ensure stability. At the same time, multiple support beam assemblies 2 can also be equipped to increase stability and adjustability, thereby improving the compatibility with the coal mining environment.

[0057] The telescopic support beam 203 includes a base 2031 and a support rod 2032 disposed on the base 2031. The number of support rods 2032 is at least one. The following embodiment uses two support rods as an example for explanation.

[0058] Two second hollow cavities are formed on the main body 201 of the support beam to accommodate two support rods 2032, with the two support rods 2032 extending into the two second hollow cavities respectively. The two ends of the second adjusting cylinder 202 are connected to the main body 201 of the support beam and the base 2031 respectively. The function of the second adjusting cylinder 202 is to push / pull back the telescopic stop beam 103 when it performs its telescopic movement, thereby extending or shortening the overall length of the support beam assembly 2, achieving the purpose of adjustable length for the support beam assembly 2.

[0059] The specific connection methods of each component within the support beam assembly 2 are as follows:

[0060] The main body 201 of the support beam is connected to the telescopic support beam 203 via a second adjusting cylinder 202, thereby enabling relative movement between the main body 201 and the telescopic support beam 203. Specifically, the fixed end of the second adjusting cylinder 202 is connected to the fifth lug 4e on the main body 201 of the support beam, and the actuating end of the second adjusting cylinder 202 is connected to the sixth lug 4f on the base 2031. The bottom of the base 2031 serves as the bottom support end face 2033 of the support beam assembly 2, resting against the ground. In practical application, the second adjusting cylinder 202 pushes the telescopic support beam 203 to extend from the main body 201 of the support beam, and the base 2031 contacts the ground for auxiliary support.

[0061] A seventh lug 4g is provided on the main body of the support beam 201. The main body of the support beam 201 and the main body of the retaining beam 101 are hinged together by the seventh lug 4g and the third lug 4c on the main body of the retaining beam 101. An eighth lug 4h is also provided on the main body of the support beam 201. The actuating end of the swing cylinder 3 is hinged to the eighth lug 4h. The retaining beam assembly 1 achieves relative swing with the support beam assembly 2 through the swing cylinder 3.

[0062] The above structural design enables the swing cylinder 3 to connect the retaining beam assembly 1 and the support beam assembly 2, forming a stable mechanism that provides strong support for the roadway 5. The top support end face 1031 abuts against the roadway top surface 6, and the bottom support end face 2033 abuts against the ground, which can effectively prevent the roadway top surface 6 from collapsing and improve the stability and safety of the roadway top surface 6.

[0063] One end of the retaining beam body 101 is provided with an embedded protrusion 104, and the other end is provided with a receiving groove 105 that matches the embedded protrusion 104, so that multiple hydraulic armor brackets can be assembled into one unit. During assembly, it is only necessary to embed the embedded protrusion 104 of the retaining beam body into the receiving groove 105 of the adjacent retaining beam body. Not only is the installation method simple, but the structure is also stable after splicing.

[0064] In some illustrative embodiments, such as Figure 6-9 As shown, a concealed retaining wall 9 is provided, which is assembled from several hydraulic concealed retaining supports 8. Specifically, the embedding protrusions 104 of each retaining beam body 101 are embedded into the receiving grooves 105 of adjacent retaining beam bodies 101 to assemble and form the concealed retaining wall 9. After assembly, the protective plate surfaces 1011 of each retaining beam body 101 are spliced ​​to form the overall protective surface of the tunnel, the top support end faces 1031 of each telescopic retaining beam 103 are arranged along the arrangement direction of the hydraulic concealed retaining supports to form the tunnel top support surface, and the bottom support end faces 2033 of each telescopic support beam 203 are arranged along the arrangement direction of the hydraulic concealed retaining supports to form the ground auxiliary support surface.

[0065] In actual operation, a hydraulic telescopic support 8 is installed in the roadway 5 of the coal mining face 7, on the side closest to the coal mining face 7. The first adjusting cylinder 102 within the hydraulic telescopic support 8, using the first lug 4a as a support point, pushes the telescopic beam 103 to extend, supporting the roadway roof 6 of the roadway 5. The swing cylinder 3 extends and retracts using the fourth lug 4d as a fulcrum, pushing the telescopic support beam 203 to swing using the third lug 4c as a hinge point. The second adjusting cylinder 202, using the fifth lug 4e as a support point, pushes the telescopic support beam 203 to extend from the support beam body 201, with the base 2031 contacting the ground for auxiliary support.

[0066] As the coal face 7 advances, hydraulic shield supports 8 are installed sequentially in the roadway 5 along the same direction of advancement. During installation, the receiving groove 105 of the retaining beam body 101 of the hydraulic shield support 8 is embedded in the insert protrusion 104 of the retaining beam body 101 of the hydraulic shield support 8. Adjacent hydraulic shield supports 8 are seamlessly assembled to form a shield retaining wall 9, thereby constructing a completely seamless retaining wall to form a blocking surface. This helps to fill the goaf with sand and gravel aggregate and its solidification, prevents the collapse and fall of the roof and floor, effectively prevents geological disasters, and protects the ecological environment.

[0067] The retaining wall 9 divides the coal mining face 7 into two parts: the goaf area 11 and the goaf-retention roadway 12. As the coal mining face 7 advances and coal mining ends, the goaf-retention roadway 12 is formed behind the coal mining face 7, which is used as the next coal mining face. This completes one goaf-retention roadway. The next goaf-retention roadway can be made in the same way. Among them, inclined coal seams retain haulage roadways, while near-horizontal coal seams can retain either haulage roadways or return air roadways, or both roadways simultaneously.

[0068] The structural design of the hydraulic armor support 8 and the armor retaining wall 9 allows for disassembly and reuse, with fast installation speed and high efficiency, reducing the input of support materials and the overall cost of the tunnel.

[0069] like Figure 4-9 As shown, in some illustrative embodiments, the present invention also provides a method for creating a lane along the edge based on a retaining wall, in... Figure 4 In this method, the coal mining face 7 is located between the coal seam roof 15 and the coal seam roof 16, and the roadway 5 has roadway sides 17 and roadway floor 18. The method includes the following steps:

[0070] First, anchor cables 13 and anchor bolts 14 are installed on the top surface of the working face roadway for auxiliary support. Specifically, within the mining coal seam, a roadway 5 with a width of B is constructed along the strike of the coal seam, and the top surface 6 of roadway 5 is supported by a combination of anchor cables 13 and anchor bolts 14.

[0071] Then, on the side closest to the coal face 7, hydraulic armor supports 8 are sequentially arranged along the direction of face advance to form armor retaining walls 9. When arranging the hydraulic armor supports 8, the protective plate surface 1011 of the hydraulic armor supports 8 faces the coal face 7. At the same time, the length of the retaining beam assembly 1 of the hydraulic armor supports is adjusted so that the top support end face 1031 of the hydraulic armor supports abuts against the top surface 6 of the roadway. At the same time, the length of the support beam assembly 2 is adjusted so that the bottom support end face 2033 of the support beam assembly abuts against the ground. Meanwhile, the angle between the retaining beam assembly 1 and the support beam assembly 2 is adjusted by the swing cylinder 3 so that the hydraulic armor supports 8 fit against the surrounding rocks in the roadway.

[0072] During the installation process, after one hydraulic armor-blocking bracket 8 is set up, the receiving groove 105 of the retaining beam body 101 of the next hydraulic armor-blocking bracket 8 is embedded in the embedding protrusion 104 of the retaining beam body 101 of the hydraulic armor-blocking bracket 8. The two adjacent hydraulic armor-blocking brackets 8 are assembled in the above manner to finally form the armor-blocking retaining wall 9.

[0073] The retaining wall 9 divides the coal mining face 7 into two parts: the goaf area 11 and the goaf-retention roadway 12. As the coal mining face 7 advances and coal mining ends, the goaf-retention roadway 12 is formed behind the coal mining face 7, which is used as the next coal mining face. This completes one goaf-retention roadway. Among them, inclined coal seams retain haulage roadways, while near-horizontal coal seams can retain either haulage roadways or return air roadways, or both roadways simultaneously.

[0074] Material was filled into goaf 11.

[0075] After the current working face is mined, the goaf retention roadway 12 will be used as the roadway for the next coal mining working face. The hydraulic shield support 8 will be arranged along the next coal mining working face to form a new shield retaining wall. The next goaf retention roadway will be carried out in the same way.

[0076] The goaf retention method of this invention involves installing hydraulic shield supports 8 along the goaf roadway during the forward advance of the working face to support the roadway roof 6. These hydraulic shield supports 8 create a seamless retaining wall, effectively preventing rockfalls into the roadway and improving the overall safety of the working face. Furthermore, only one roadway 5 needs to be constructed for the subsequent working face, forming a new working face system with the goaf retention roadway 12. This simplifies the coal mining process, reduces the amount of new roadway excavation work, and lowers the overall mine construction cost. Simultaneously, the goaf retention method of this invention eliminates the need for safety coal pillars between working faces, improving coal recovery rates and reducing the amount of new roadway excavation work.

[0077] At the same time, the retaining wall 9 divides the coal mining face into two parts: one part is the goaf area, and the other part is the roadway that is retained and reused as a roadway for the next working face. This makes the goaf area behind the mining direction form a goaf retention roadway 12. After the coal mining face is recovered, one goaf retention roadway is completed. The next goaf retention roadway can be carried out in the same way.

[0078] The combination of hydraulic shear wall support for roadway roof support and goaf filling technology can effectively control surface subsidence, prevent geological disasters, and protect the ecological environment. Furthermore, this invention's method of using hydraulic shear wall supports for goaf retention can also be used to manage surface subsidence in steeply inclined coal seams. Currently, in fully mechanized longwall mining of steeply inclined coal seams, the roof coal and roof are different from those of gently inclined coal seams, making them prone to large-scale collapses and inducing sudden impacts from accumulated gas in the goaf, leading to surface subsidence. Therefore, roof control and support are crucial during mining. This invention's shear wall retaining wall constitutes the overall protective surface and roof support surface of the roadway. After filling the goaf with crushed stone filler, it can effectively prevent large-scale collapses of the coal seam or gangue. The support angle can also be adjusted according to the spatial environment at the support location to adapt to different support needs.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A hydraulic orthopedic support, characterized in that, The application is applied to fully mechanized caving mining of steeply inclined coal seam, comprising: a blocking beam assembly, a support beam assembly and a swing oil cylinder; The blocking beam assembly comprises a blocking beam body, a first adjusting oil cylinder and a telescopic blocking beam, the telescopic blocking beam is connected with the blocking beam body through the first adjusting oil cylinder, the top of the telescopic blocking beam is provided with a top supporting end face for supporting the roof of the roadway; a first hollow cavity is formed in the blocking beam body, the first adjusting oil cylinder and the telescopic blocking beam are arranged in the first hollow cavity, and the top supporting end face of the telescopic blocking beam extends from the cavity opening of the first hollow cavity and abuts against the roof of the roadway; one side of the blocking beam body faces the coal mining face to form a protective plate face, and the other side is provided with the support beam assembly which is hinged to the blocking beam body; The support beam assembly comprises a support beam body, a second adjusting oil cylinder and a telescopic support beam, the telescopic support beam is connected with the support beam body through the second adjusting oil cylinder, and the bottom of the telescopic support beam is provided with a bottom supporting end face for contacting the ground; The swing oil cylinder is hinged to the blocking beam body and the support beam body at both ends, so that the support beam assembly swings relative to the blocking beam assembly through the swing oil cylinder; The other side surface of the blocking beam body is provided with a third ear seat and a fourth ear seat, the third ear seat is used for being hinged to the support beam assembly, and the fourth ear seat is used for being hinged to the fixed end of the swing oil cylinder; the swing oil cylinder is pivoted at the fourth ear seat to extend and retract, and the telescopic support beam is swung at the third ear seat as the hinge point, so as to adjust the opening angle of the blocking beam assembly and the support beam assembly.

2. The hydraulic surgical support of claim 1, wherein, The number of the support beam assembly is at least one; the telescopic support beam comprises a base and a support rod arranged on the base; a second hollow cavity adapted to the support rod is formed in the support beam body, and the support rod extends into the second hollow cavity; and the bottom of the base serves as the bottom supporting end face and abuts against the ground.

3. The hydraulic surgical support of claim 2, wherein, One end of the blocking beam body is provided with an embedded protrusion, and the other end is provided with a containing groove matched with the embedded protrusion.

4. A retaining wall of the type defined above, characterised in that A plurality of hydraulic support racks as claimed in any one of claims 1-3 are assembled to form a total protective surface of the roadway by splicing the protective plate faces of the blocking beam bodies, form a roadway roof supporting surface by arranging the top supporting end faces of the telescopic blocking beams along the arrangement direction of the hydraulic support racks, and form a ground auxiliary supporting surface by arranging the bottom supporting end faces of the telescopic support beams along the arrangement direction of the hydraulic support racks.

5. The retaining wall of claim 4, wherein, The embedded protrusions of the blocking beam bodies are embedded into the containing grooves of adjacent blocking beam bodies to form the support wall.

6. A gob-side entry retaining method based on a fortune-telling retaining wall, characterized in that, The application comprises: The hydraulic support racks as claimed in any one of claims 1-3 are arranged in sequence along the advancing direction of the coal mining face to form a support wall, the support wall separates the coal mining face into a goaf and a roadway along the goaf, and the rear of the advancing direction constitutes the roadway along the goaf; The goaf is filled with materials; After the current working face coal mining is completed, the gob-side entry retaining roadway is used as a roadway for the next coal mining working face, and the hydraulic support is arranged along the next coal mining working face; wherein, when the hydraulic support is arranged along the working face advancing direction, the protection plate of the hydraulic support faces the coal mining working face, and the length of the blocking beam assembly of the hydraulic support is adjusted so that the top supporting end face of the hydraulic support abuts against the roadway top face, and the length of the supporting beam assembly is adjusted so that the bottom supporting end face of the supporting beam assembly abuts against the ground.

7. The method according to claim 6, characterized in that, Also comprising: When the hydraulic support is arranged along the working face advancing direction, the included angle between the blocking beam assembly and the supporting beam assembly is adjusted by the swing oil cylinder so that the hydraulic support is attached to the surrounding rock in the roadway.

8. The gob-side entry retaining method based on the Chinese fortune block wall according to claim 7, characterized in that, Before the hydraulic support is arranged along the working face advancing direction, the anchor cable and the anchor rod are arranged on the working face roadway top face for auxiliary support.

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