A flexible hydraulic support for mine support

Abstract

The present invention discloses a flexible hydraulic support for mining, comprising a top beam, a connecting beam, and a bottom beam, wherein the two ends of the connecting beam are hinged to one end of the top beam and one end of the bottom beam, respectively. The front end of the top beam contacts the top plate of the working area, and the bottom beam contacts the bottom plate of the working area. A first telescopic support hinged to the top beam and the bottom beam is provided between the top beam and the bottom beam, and a second telescopic support hinged to the top beam and the connecting beam is provided between the top beam and the bottom beam. The top beam, the connecting beam, and the bottom beam form a multi-fold beam group, and the beam group encloses a space for workers to work. The present invention constructs a sufficient space for workers to work by controlling the extension and contraction of the two telescopic supports to control the angle between the top beam and the connecting beam and the distance between the top beam and the bottom beam, thereby achieving effective support for the top plate and controllable movement of the entire hydraulic support. Under the support of the two telescopic supports between the top plate and the bottom plate, the support capacity of the entire hydraulic support is enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic supports for mines, and more particularly, relates to a flexible hydraulic support for mines, which is used for mining steeply inclined coal seams. Background Art

[0002] Currently, the main support technologies for mining steeply inclined coal seams include heavy-duty stack hydraulic supports, miners' steel flexible shield supports, and flexible shield hydraulic supports. Heavy-duty stack hydraulic supports are suitable for mining medium-thick coal seams with inclinations below 60 degrees; miners' steel flexible shield supports are suitable for mining medium-thick coal seams with inclinations exceeding 50 degrees; and flexible shield hydraulic supports are suitable for mining medium-thick and thick coal seams exceeding 1.5 meters. However, for mining in coal seams with inclinations below 50 degrees and thicknesses below 1.5 meters, heavy-duty stack hydraulic supports have significant drawbacks, such as heavy equipment, difficult handling, limited under-support space, and the possibility of support slipping. Miners' steel flexible shield supports have extremely limited ventilation and pedestrian clearance. Flexible shield hydraulic supports also have drawbacks such as limited space and unstable support, which can easily cause the support to fall over. In short, these three types of supports are difficult to solve the support problems in coal seams with inclinations below 50 degrees or thicknesses below 1.5 meters. Therefore, the development of a new support technology suitable for mining in these conditions is urgent and necessary. Summary of the Invention

[0003] To this end, the present invention provides a mine support flexible hydraulic support to solve the mining support problem of coal seams with an inclination angle of less than 50 degrees or a coal thickness of less than 1.5 meters.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A flexible hydraulic support for mining support, the hydraulic support includes a top beam, a connecting beam and a bottom beam, the two ends of the connecting beam are respectively hinged to one end of the top beam and one end of the bottom beam, the front end of the top beam is in contact with the top plate of the working area, and the bottom beam is in contact with the bottom plate of the working area, a first telescopic support is provided between the top beam and the bottom beam, which is respectively hinged to the two, and a second telescopic support is provided between the top beam and the connecting beam, which is respectively hinged to the two. The top beam, connecting beam and bottom beam form a multi-fold beam group, and the beam group encloses a space for staff to work.

[0006] Preferably, at least one connecting seat for connecting a plurality of hydraulic supports in series is provided on the top beam, and a flexible connection is formed between adjacent hydraulic supports via inter-frame connectors.

[0007] Preferably, the top beam is a three-fold beam structure, which includes a first section in contact with the top plate of the working area, a middle support section and a connecting section hinged to one end of the connecting beam, the upper end of the second telescopic support is hinged to the rear end of the first section, and the upper end of the first telescopic support is hinged to the front end of the first section.

[0008] Preferably, the bending angle formed by the three-fold beam structure on the top beam is greater than 90°.

[0009] More preferably, the bending angle formed by the three-fold beam structure on the top beam is 120° to 150°.

[0010] Furthermore, at least one of the first section, the middle supporting section and the connecting section is respectively provided with at least one connecting seat for connecting a plurality of the hydraulic supports in series.

[0011] Further preferably, the first section of the top beam is divided into two parts, the first section I at the front end and the first section II at the rear end, the first section I and the first section II are connected by a flexible structure, the first section I is hinged to the first telescopic support, and the first section II is hinged to the second telescopic support.

[0012] The flexible structure includes an articulated seat I arranged at the end of the first section I, an articulated seat II arranged at the end of the first section II, and a pillar connecting piece, and the two ends of the pillar connecting piece are respectively hinged to the articulated seat I and the articulated seat II.

[0013] The connecting beam is also provided with at least one connecting seat for forming a flexible series connection of multiple hydraulic supports.

[0014] The first telescopic support and the second telescopic support are both hydraulic jacks.

[0015] The technical solution of the present invention has the following beneficial effects:

[0016] A. The present invention provides a multi-fold top beam, connecting beam and bottom beam, and simultaneously provides a hinged second telescopic support between the top beam and the connecting beam support, and provides a hinged first telescopic support between the top beam and the bottom beam. By controlling the extension and retraction of the two telescopic supports, the angle between the top beam and the connecting beam and the distance between the top beam and the bottom beam are controlled, thereby achieving effective support for the top plate and controllable movement of the entire hydraulic support. Under the support of the two telescopic supports between the top plate and the bottom plate, the support capacity is enhanced.

[0017] B. This invention utilizes a multi-fold top beam structure to create a workspace between the top beam, connecting beam, and bottom beam, providing a larger and more convenient workspace. Furthermore, the hydraulic support achieves controlled movement by retracting the second telescopic strut and unloading with the first telescopic strut before moving. The top beam, connecting beam, bottom beam, first telescopic strut, and second telescopic strut fully protect the mining space, which varies within a certain range. The first telescopic strut, articulated with the bottom and top beams, effectively supports the roof, thereby achieving comprehensive protection for the mining space.

[0018] C. This invention divides the first section into first section I and first section II, and connects them with a flexible structure. This reduces the impact between the first and second telescopic struts, facilitates unloading of the first section, and improves the hydraulic support's operational performance. Furthermore, given the uneven top surface of the workspace, the splitting of the first section into two increases the contact between the first section and the top surface, enhancing the support performance of the hydraulic support. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention, the following will briefly introduce the drawings required for use in the specific embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the first hydraulic support provided by the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the second hydraulic support provided by the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the third hydraulic support provided by the present invention;

[0023] Figure 4 This is a schematic diagram of the hydraulic support structure in working condition.

[0024] Description of reference numerals:

[0025] 1-Top beam

[0026] 11-First paragraph, 11a-First paragraph I, 11b-First paragraph II

[0027] 12-Middle support section

[0028] 13-Connection segment

[0029] 2-Connecting beam; 3-Bottom beam; 4-Working area; 5-Top plate; 6-Bottom plate

[0030] 7-first telescopic support; 8-second telescopic support; 9-connecting seat

[0031] 10-Flexible structure

[0032] 10a-hinge seat I, 10b-hinge seat II, 10c-pillar connecting piece. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the systems or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] like Figure 1As shown in Figure 3, the present invention provides a flexible hydraulic support for mining, including a top beam 1, a connecting beam 2 and a bottom beam 3, the two ends of the connecting beam 2 are hinged to one end of the top beam 1 and one end of the bottom beam 3 respectively, the front end part of the top beam 1 is in contact with the top plate 5 of the working area 4, and the bottom beam 3 is in contact with the bottom plate 6 of the working area 4, and a first telescopic support 7 is provided between the top beam 1 and the bottom beam 3, which is hinged to the two respectively. The extension and contraction of the first telescopic support 7 can drive the bottom beam 3 to rotate relative to the connecting beam 2, and a second telescopic support 8 is provided between the top beam 1 and the connecting beam 2, which is hinged to the two respectively. The extension and contraction of the second telescopic support 8 can adjust the angle between the main beam 1 and the beam body 2, the top beam 1, the connecting beam 2 and the bottom beam 3 form a multi-fold beam group, and the beam group encloses an ample space for staff to work, and the other parts of the top beam 1 and the connecting beam 2 jointly isolate the goaf to prevent the waste rock in the goaf from entering the working space.

[0037] The first telescopic support 7 and the second telescopic support 8 are both hydraulic jacks. Of course, other controllable support structures can also be used.

[0038] Figure 1 The top beam 1 shown is a three-fold beam structure, comprising a first section 11 in contact with the top plate 5 of the work area 4, a middle support section 12, and a connecting section 13 hingedly connected to one end of the connecting beam 2. The upper end of the second telescopic support 8 is hingedly connected to the rear end of the first section 11, and the upper end of the first telescopic support 7 is hingedly connected to the front end of the first section 11. The bending angle formed by the three-fold beam structure of the top beam 1 is greater than 90°, preferably 120-150°.

[0039] To facilitate the serial connection of multiple hydraulic supports, the present invention provides at least one connector 9 on top beam 1 for flexible serial connection of multiple hydraulic supports. For example, at least one connector 9 for serial connection of multiple hydraulic supports is provided on at least one of top beam 1's head section 11, middle support section 12, and connecting section 13. Connectors (not shown) are mounted within connectors 9 and are connected to connectors 9 using pins. Figure 1 The top beam 1 in the middle is provided with two connecting seats 9, which are respectively arranged on the first section 11 and the middle support section 12; Figure 2 In the illustrated hydraulic support structure, a connecting seat 9 is further provided on the connecting beam 2. Multiple hydraulic supports within the working surface are connected to the connecting seat 9 via inter-frame connectors to form a flexible support structure. Preferably, there are three connecting seats. Furthermore, the number and position of the connecting seats 9 are not limited to those described in the above embodiment, and other different arrangements are possible, which will not be elaborated here.

[0040] like Figure 3As shown, the present invention further preferably divides the first section 11 of the top beam 1 into a first section I11a at the front end and a first section II11b at the rear end. The first sections I11a and II11b are connected by a flexible structure 10. The first section I11a is hinged to the first telescopic support 7, and the first section II11b is hinged to the second telescopic support 8. The flexible structure 10 preferably includes an articulated seat I10a provided at the end of the first section I11a, an articulated seat II10b provided at the end of the first section II11b, and a support connector 10c. The two ends of the support connector 10c are respectively articulated to the articulated seat I10a and the articulated seat II10b. The use of a flexible structure to connect the first section I11a at the front end and the first section II11b at the rear end can reduce the mutual influence between the first telescopic support and the second telescopic support, facilitate the operation to achieve unloading of the first section of the support, and improve the operational performance of the hydraulic support. In addition, there are certain concave and convex changes in the top plate of the working space. After the first section is divided into two sections, the contact between the first section and the top plate can be increased, thereby improving the support performance of the hydraulic support.

[0041] The specific operation of the hydraulic support is as follows:

[0042] By operating the hydraulic system to control the extension and retraction of the first and second telescopic struts 7 and 8, the distance and angle between the top beam 1 and bottom beam 3 can be adjusted to accommodate variations in the thickness of the coal seam and the angle of the roof and floor panels of the working face, enabling the hydraulic support to be controllably supported between the roof and floor panels of the working face. When the hydraulic support needs to move, the first and second telescopic struts 7 and 8 are controlled to retract, causing the top and bottom beams of the hydraulic support and the roof and floor panels of the working area to be unsupported. The hydraulic support then slides down along the roof and floor panels under its own weight and the force of the goaf above it. Once the inter-frame connections between the hydraulic support and the adjacent hydraulic support are tightened, the hydraulic support is brought to a standstill under tension. At this point, the hydraulic system controls the extension of the first and second telescopic struts 7 and 8, allowing the top and bottom beams of the hydraulic support to once again support the roof and floor panels of the working face. By sequentially operating all active hydraulic supports, the entire support system is moved, completing a single movement cycle, effectively completing a single hydraulic support movement cycle.

[0043] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A flexible hydraulic support for mine support, characterized in that: The hydraulic support comprises a top beam (1), a connecting beam (2) and a bottom beam (3), the two ends of the connecting beam (2) are hinged to one end of the top beam (1) and one end of the bottom beam (3), respectively; the front end of the top beam (1) contacts the top plate (5) of the working area (4), and the bottom beam (3) contacts the bottom plate (6) of the working area (4); a first telescopic support (7) is provided between the top beam (1) and the bottom beam (3), respectively hinged to the two; a second telescopic support (8) is provided between the top beam (1) and the connecting beam (2), respectively hinged to the two; the top beam (1), the connecting beam (2) and the bottom beam (3) form a multi-fold beam group, and the beam group encloses a space for workers to work; The top beam (1) is a three-fold beam structure, comprising a first section (11) in contact with the top plate (5) of the working area (4), a middle support section (12), and a connecting section (13) hinged to one end of the connecting beam (2); the upper end of the second telescopic support (8) is hinged to the rear end of the first section (11), and the upper end of the first telescopic support (7) is hinged to the front end of the first section (11); The first section (11) of the top beam (1) is divided into two parts: a first section I (11a) at the front end and a first section II (11b) at the rear end. The first section I (11a) and the first section II (11b) are connected via a flexible structure (10). The first section I (11a) is hinged to the first telescopic support (7), and the first section II (11b) is hinged to the second telescopic support (8).

2. The mine support flexible hydraulic support according to claim 1, characterized in that: The top beam (1) is provided with at least one connecting seat (9) for connecting a plurality of hydraulic supports in series, and adjacent hydraulic supports are connected to each other in a flexible manner via inter-frame connecting pieces.

3. The mine support flexible hydraulic support according to claim 2, characterized in that: The bending angle formed by the three-fold beam structure on the top beam (1) is greater than 90°.

4. The mine support flexible hydraulic support according to claim 3 is characterized in that: The bending angle formed by the three-fold beam structure on the top beam (1) is 120° to 150°.

5. The mine support flexible hydraulic support according to claim 4, characterized in that: At least one of the first section (11), the middle support section (12) and the connecting section (13) is provided with at least one connecting seat (9) for connecting a plurality of hydraulic supports in series.

6. The mine support flexible hydraulic support according to claim 5, characterized in that: The flexible structure (10) includes an articulated seat I (10a) arranged at the end of the first section I (11a), an articulated seat II (10b) arranged at the end of the first section II (11b), and a pillar connecting member (10c), wherein both ends of the pillar connecting member (10c) are respectively hinged to the articulated seat I (10a) and the articulated seat II (10b).

7. The mine support flexible hydraulic support according to any one of claims 2 to 6, characterized in that: The connecting beam (2) is also provided with at least one connecting seat (9) for forming a flexible series connection of multiple hydraulic supports.

8. The mine support flexible hydraulic support according to claim 1, characterized in that: The first telescopic support (7) and the second telescopic support (8) are both hydraulic jacks.

Images