A mobile support bracket for coal mining

Abstract

The application discloses a mobile supporting bracket for coal mining, and relates to the field of supporting brackets for coal mining, which comprises a supporting frame, a fixed horizontal plate is fixedly connected to the top of the supporting frame, two groups of first hydraulic jacks are fixedly connected to the bottom of the fixed horizontal plate in a symmetrical mode, the setting of an angle adjusting assembly and an auxiliary supporting assembly can realize flexible angle adjustment, the supporting bracket can be closely combined with an inclined top plate, the gap between a traditional supporting structure and the top plate is eliminated, local stress concentration caused by insufficient contact is avoided, the roof fall caused by uneven stress of the top plate is prevented, the top plate can be supported under the action of a non-Newtonian fluid buffer bag, the load of the traditional supporting structure can be shared, the vertical pressure of the top plate and the shear force along the slope downward can be more evenly dispersed into the supporting system, the bearing pressure of a single supporting structure is reduced, and the supporting components are prevented from being deformed and damaged due to overload.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of supporting support for coal mining, in particular to a mobile supporting support for coal mining. BACKGROUND

[0002] In the energy industry system, coal as an important fossil energy, has long occupied a key position in the field of power production, industrial heating, chemical raw materials and other fields. With the development of social economy, the demand for coal resources promotes the continuous evolution of coal mining technology, from early manual coal mining, blasting coal, to mechanized fully mechanized mining, intelligent mining and other modern processes.

[0003] At present, coal mining is mainly divided into two categories: underground mining and open-pit mining. Among them, underground mining needs to go deep into the coal seam, and through the development of roadway, the layout of working face to complete the crushing and transportation of coal, the roadway parallel to the coal seam in the coal mining face is also called the crossheading, which is mainly divided into transportation crossheading and return air crossheading. The transportation crossheading is used for transporting the mined coal, materials and equipment, and the return air crossheading undertakes the ventilation task of the working face and discharges harmful gases such as gas. In the process of underground mining, the coal seam and the surrounding rock mass are originally in a stable stress balance state. When the coal is mined out, the original stress balance is broken, forming a goaf. At this time, the rock layer (roof) above the coal seam loses support and will deform, sink and even collapse under the action of gravity and overburden pressure. This phenomenon is called "mine pressure appearance".

[0004] In order to avoid roof collapse causing safety accidents (such as burying the working face, damaging equipment and personnel), and at the same time ensure the stability of the coal mining space, supporting support must be used to effectively support the roof.

[0005] A "rapid excavation advanced support" is disclosed in Chinese patent No. 201410475830.X, which includes an inner support group and an outer support group. The inner and outer support groups each include two left and right supports. The support includes a base, a top beam, and a height-adjustable connecting piece between the base and the top beam. Each support group is connected by two front and rear crossbeams to form a whole with its left and right top beams. The crossbeams are provided with longitudinal beams connected thereto. The left and right supports of the inner support group are arranged inside the left and right supports of the outer support group. The crossbeams and longitudinal beams of the inner and outer support groups are arranged alternately. The front end of the longitudinal beam of the inner support group has a cantilever beam. The left and right bases and crossbeams of the inner and outer support groups are respectively provided with push-pull oil cylinders. There is a height difference between the top of the crossbeam and the bottom of the longitudinal beam of the support group. The top of the crossbeam is provided with a roller at a position corresponding to the bottom of the longitudinal beam of the other support group.

[0006] Although the technical scheme can realize self-moving of the support, and cyclically perform the comprehensive tunneling and the advanced support, the roof will be continuously bumped, thereby causing damage of the roof, and the crossheading as a key channel connecting the coal mining face and the main roadway has a complex roof form affected by the geological structure and not in an ideal horizontal state, and a natural slope often exists, thereby the hard support of the roof by the device firstly causes uneven stress, and secondly the single support device cannot effectively support the roof.

[0007] Therefore, a mobile support support for coal mining is provided. SUMMARY

[0008] The present application aims to provide a mobile support support for coal mining to solve the problems in the background art.

[0009] To achieve the above object, the present application provides the following technical scheme: a mobile support support for coal mining, comprising a support frame, a fixed horizontal plate is fixedly connected to the top of the support frame, two groups of first hydraulic jacks are symmetrically fixedly connected to the bottom of the fixed horizontal plate, the number of the first hydraulic jacks in each group is not less than two, an angle adjusting assembly is arranged on the support frame, the angle adjusting assembly comprises two semicircular blocks, the two semicircular blocks are fixedly connected to the support frame, a semicircular plate is fixedly connected to the side wall of each semicircular block, a sliding arc-shaped block is slidingly connected to the outer arc surface of the two semicircular plates, and a contact plate is fixedly connected to the top of the sliding arc-shaped block.

[0010] A moving assembly is arranged on the support frame, the moving assembly comprises a T-shaped sliding plate, the T-shaped sliding plate is slidingly connected through the fixed horizontal plate, a horizontal sliding groove is formed in the middle of the fixed horizontal plate, and a rectangular groove is formed in the bottom of the T-shaped sliding plate.

[0011] An auxiliary support assembly is arranged on the support frame, the auxiliary support assembly comprises two groups of connecting columns, the number of the connecting columns in each group is not less than two, and each group of connecting columns is fixedly connected to the top of the sliding arc-shaped block.

[0012] An observation assembly is arranged on the support frame, the observation assembly comprises two horizontal transparent tubes, and the two horizontal transparent tubes are symmetrically fixedly connected to the side wall of the contact plate.

[0013] Further, the angle adjusting assembly further comprises two arc-shaped grooves, each arc-shaped groove (403) is formed in the top of the semicircular plate, each arc-shaped groove has a penetrating structure, and a first sliding cylinder is slidingly connected in each arc-shaped groove.

[0014] Further, the mobile assembly further comprises two second hydraulic jacks, the two second hydraulic jacks are fixedly connected to the top of the inner cavity of the rectangular groove, the side wall of the T-shaped sliding plate is fixedly connected with an electric telescopic rod in a symmetrical mode, and the telescopic shaft end of each electric telescopic rod is fixedly connected with a fixed vertical plate.

[0015] Further, the auxiliary support assembly further comprises four rotating cylinders, each rotating cylinder is rotationally connected to the outer side of the connecting column, an opening is formed in the inner portion of each rotating cylinder, a second sliding cylinder is slidably connected in the inner portion of each opening, and a non-Newtonian fluid buffer bag is arranged in the opening.

[0016] Further, the observation assembly further comprises two residual spherical grooves, each residual spherical groove is formed in the inner cavity bottom of the transverse transparent tube, and a spherical body is slidably connected in the inner portion of each transverse transparent tube.

[0017] Further, the horizontal sliding groove is slidably matched with the outer side of the T-shaped sliding plate.

[0018] Further, the top portions of the two first sliding cylinders are fixedly connected with the bottom of the sliding arc-shaped block.

[0019] Further, the top of each fixed vertical plate is fixedly connected with the bottom of the fixed horizontal plate.

[0020] Further, the outer side of the second sliding cylinder is slidably matched with the rotating cylinder.

[0021] Further, each spherical body is slidably matched with the residual spherical groove.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1. By adjusting the setting of the angle assembly and the auxiliary support assembly, the flexible angle adjustment can be realized, the close fit with the inclined top plate can be realized, the gap between the traditional support and the top plate can be eliminated, the local stress concentration caused by insufficient contact can be avoided, the roof fall caused by uneven stress of the top plate crack can be prevented, the top plate can be assisted and supported under the action of the non-Newtonian fluid buffer bag, the load of the traditional support can be shared, the vertical pressure of the top plate and the shear force downward along the inclined plane can be more evenly dispersed into the support system, the bearing pressure of the single support structure can be reduced, and the deformation and damage of the support components caused by overload can be avoided.

[0024] 2、Through the setting of the moving assembly, the same displacement can be carried out along with the advance of the coal mining work, the situation that the front top is not supported during the advance of the coal mining work is avoided, the risk of roof fall due to the absence of the supporting effect is avoided, and the damage to the roof caused by the continuous impact of the traditional moving support on the roof is avoided, so that the integrity of the roof is ensured.

[0025] 3、Through the setting of the observation assembly, the staff can directly perceive whether the slope of the roof changes or not by observing the rolling direction and position of the balance ball in the pipe without the aid of complex tools, the subtle change of the roof slope has a directly observable and tangible embodiment, which can help the staff quickly understand the current state of the roof and provide an instant judgment for the adjustment of the support and other operations. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic view of the overall structure of the present application;

[0027] Figure 2 It is a three-dimensional schematic view of the positional relationship structure of the support frame, the fixed transverse plate and the first hydraulic jack of the present application;

[0028] Figure 3 It is a sectional view schematic view of the structure of the fixed transverse plate and the T-shaped sliding plate of the present application;

[0029] Figure 4 It is a three-dimensional schematic view of the angle adjustment assembly structure of the present application;

[0030] Figure 5 It is an enlarged schematic view of the structure at A in the present application; Figure 4

[0031] Figure 6 It is a sectional view schematic view of the sliding arc-shaped block structure of the present application;

[0032] Figure 7 It is a three-dimensional schematic view of the auxiliary support assembly structure of the present application;

[0033] Figure 8 It is a sectional view schematic view of the connection and rotating cylinder structure of the present application;

[0034] Figure 9 It is a sectional view schematic view of the observation assembly structure of the present application;

[0035] Figure 10 It is an enlarged schematic view of the structure at B in the present application. Figure 9 The reference numbers in the figure represent:

[0036] 1, support frame; 101, fixed transverse plate;

[0037]

[0038] ​​2、first hydraulic jack;

[0039] 3、moving assembly; 301、T-shaped sliding plate; 302、horizontal sliding groove; 303、rectangular groove; 304、second hydraulic jack; 305、electric telescopic rod; 306、fixed vertical plate;

[0040] 4、adjusting angle assembly; 401、semicircular block; 402、semicircular plate; 403、arc-shaped groove; 404、first sliding cylinder; 405、sliding arc-shaped block; 406、abutting plate;

[0041] 5、auxiliary supporting assembly; 501、connecting column; 502、rotating cylinder; 503、opening; 504、second sliding cylinder; 505、non-Newtonian fluid buffer bag;

[0042] 6、observation assembly; 601、transverse transparent tube; 602、residual spherical groove; 603、sphere. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0044] Please refer to Figures 1 to 10 An embodiment provided by the present application is a movable supporting bracket for coal mining work. The roadway parallel to the coal seam in the coal mining face, that is, the crossheading, comprises a supporting frame 1. The bottom of the supporting frame 1 is placed at the bottom of the crossheading, and a top plate is installed above the crossheading. The above are all prior art and existing devices, and thus will not be described in detail. The top of the supporting frame 1 is fixedly connected with a fixed horizontal plate 101. The bottom of the fixed horizontal plate 101 is fixedly connected with two groups of first hydraulic jacks 2 in a symmetrical manner. The number of the first hydraulic jacks 2 in each group is not less than two. An adjusting angle assembly 4 is arranged on the supporting frame 1. The adjusting angle assembly 4 comprises two semicircular blocks 401 fixedly connected to the supporting frame 1. The sidewall of each semicircular block 401 is fixedly connected with a semicircular plate 402. The outer arc surface of the two semicircular plates 402 is slidingly connected with a sliding arc-shaped block 405. The top of the sliding arc-shaped block 405 is fixedly connected with an abutting plate 406.

[0045] The support frame 1 is provided with a moving assembly 3, the moving assembly 3 comprises a T-shaped sliding plate 301, the T-shaped sliding plate 301 is slidingly connected through the fixed horizontal plate 101, the middle part of the fixed horizontal plate 101 is provided with a horizontal sliding groove 302, the horizontal sliding groove 302 is slidingly matched with the outer side of the T-shaped sliding plate 301, and the bottom of the T-shaped sliding plate 301 is provided with a rectangular groove 303;

[0046] The support frame 1 is provided with an auxiliary support assembly 5, the auxiliary support assembly 5 comprises two groups of connecting columns 501, the number of each group of connecting columns 501 is not less than two, and each group of connecting columns 501 is fixedly connected to the top of the sliding arc-shaped block 405.

[0047] The support frame 1 is provided with an observation assembly 6, the observation assembly 6 comprises two horizontal transparent tubes 601, the outer side of the horizontal transparent tube 601 is provided with a scale mark, so that when the slope of the top plate changes, the slope can be accurately observed, and the two horizontal transparent tubes 601 are fixedly connected to the side walls of the abutting plate 406.

[0048] The adjusting angle assembly 4 further comprises two arc-shaped grooves 403, each arc-shaped groove 403 is arranged at the top of the semicircular plate 402, each arc-shaped groove 403 has a penetrating structure, and a first sliding cylinder 404 is slidingly connected in each arc-shaped groove 403, and the top of the two first sliding cylinders 404 is fixedly connected with the bottom of the sliding arc-shaped block 405.

[0049] The moving assembly 3 further comprises two second hydraulic jacks 304, the second hydraulic jacks 304 and the first hydraulic jacks 2 are key execution elements in the modern engineering field, and are widely used in coal mining support supports, heavy machinery maintenance, building construction and other scenes, and are the core power components of the support system in coal mining operations, and the working principle is based on Pascal's law, the mechanical energy is converted into hydraulic energy through a manual or electric pump, the hydraulic oil forms pressure in the closed cylinder, when the pressure oil enters the rodless cavity or the rod cavity of the jack, the piston produces extension and contraction movement under the action of pressure difference, thereby driving the lifting of the support frame 1, realizing the support or withdrawal of the top plate, and the uniformity of liquid pressure transmission and the force amplification characteristics can accurately control the support force, meet the support requirements in different working conditions, therefore, the second hydraulic jacks 304 and the first hydraulic jacks 2 are existing devices of the prior art, and will not be described in detail, the two second hydraulic jacks 304 are fixedly connected to the inner cavity top of the rectangular groove 303, the side walls of the T-shaped sliding plate 301 are fixedly connected with electric telescopic rods 305, the extension shaft ends of each electric telescopic rod 305 are fixedly connected with fixed vertical plates 306, and the top of each fixed vertical plate 306 is fixedly connected with the bottom of the fixed horizontal plate 101.

[0050] The auxiliary support assembly 5 further comprises four rotating cylinders 502, each rotating cylinder 502 is rotationally connected to the outer side of the connecting column 501, the inside of each rotating cylinder 502 is provided with an opening 503, the inside of each opening 503 is slidably connected with a second sliding cylinder 504, the outer side of the second sliding cylinder 504 is slidably matched with the rotating cylinder 502, the inside of the opening 503 is provided with a non-Newtonian fluid buffer bag 505, in the non-Newtonian fluid buffer bag 505, the microstructure exists in a dispersed or aggregated state, when affected by shear stress, the arrangement mode, distribution characteristics and the force between the microstructures will change, thereby causing the viscosity of the fluid to change, for example, the particle suspension, when not affected by shear stress, the particles in the particle suspension are in a chaotic distribution state, and once shear stress is applied, the particles will appear ordered arrangement and aggregation. At this time, the viscosity of the non-Newtonian fluid buffer bag 505 will increase, which makes the shear stress increase when the non-Newtonian fluid buffer bag 505 is extruded, further promoting the increase of the viscosity of the fluid. In this process, the viscosity of the fluid increases continuously, and gradually exhibits the characteristics similar to solid, so that the second sliding cylinder 504 extrudes the non-Newtonian fluid buffer bag 505 when sliding in the opening 503 of the rotating cylinder 502, so that the fluid in the non-Newtonian fluid buffer bag 505 becomes more viscous, and the second sliding cylinder 504 and the rotating cylinder 502 become more firm.

[0051] The observation assembly 6 further comprises two residual spherical grooves 602, each residual spherical groove 602 is formed in the bottom of the inner cavity of the transverse transparent tube 601, the inside of each transverse transparent tube 601 is slidably connected with a spherical body 603, and each spherical body 603 is slidably matched with the residual spherical groove 602.

[0052] The working principle of the above embodiment is as follows:

[0053] The initialization steps are as follows:

[0054] The first hydraulic jack 2 is in an extended state, the second hydraulic jack 304 is in a retracted state, and the electric telescopic rod 305 is also in a retracted state, so that the abutting plate 406 can abut against the top plate and play a supporting role.

[0055] The working operation steps are as follows:

[0056] The working steps of the moving assembly 3 are as follows:

[0057] As the coal mining equipment advances, timely protection is needed at the point of advancement. At this time, the operator begins to extend the second hydraulic jack 304. As the second hydraulic jack 304 approaches the surface of the roadway, the operator simultaneously retracts the first hydraulic jack 2. When the second hydraulic jack 304 contacts the surface of the roadway, it does not need to apply excessive thrust to the support frame 1. At the same time, the operator drives the electric telescopic rod 305 to extend outwards, with the extension distance matching the distance the coal mining equipment has advanced. Therefore, the electric telescopic rod 305 pushes the fixed vertical plate 306 away from the electric telescopic rod 305, causing the fixed vertical plate 306 to slide the support frame 1 onto the T-shaped sliding plate 301, extending the support frame 1 beyond the outer edge of the T-shaped sliding plate 301. When the electric telescopic rod 305 extends to its maximum extent... After a certain period, the worker begins to extend the first hydraulic jack 2 and move it vertically downwards. At the same time, the worker drives the second hydraulic jack 304 to retract. When the first hydraulic jack 2 contacts the ground of the roadway, it applies excessive force to the support frame 1. Therefore, when the worker drives the electric telescopic rod 305 to retract, the force is also mutual. Because the support frame 1 is subjected to excessive force, it cannot be pulled by the electric telescopic rod 305. Therefore, the electric telescopic rod 305 begins to move towards the fixed vertical plate 306. Thus, the electric telescopic rod 305 drives the T-shaped sliding plate 301 to slide on the support frame 1. At the same time, the T-shaped sliding plate 301 enters the interior of the horizontal sliding groove 302, thereby realizing the movement of the support frame 1. As the coal mining equipment continues to advance, the worker repeats the above operation, thereby realizing the continuous movement of the support frame 1.

[0058] The movable component 3 is designed to move in tandem with the coal mining operation, preventing situations where the roof is unsupported during mining and thus avoiding the risk of roof collapse due to lack of support. It also avoids the damage to the roof caused by the continuous impact of the moving support, thus ensuring the integrity of the roof.

[0059] The working steps of the angle adjustment component 4 are as follows:

[0060] The crossheading is a key passage connecting the coal mining face and the main roadway, and its roof form is often complex due to the influence of geological structure, and is not in an ideal horizontal state, and there is often a natural slope. Along with the operation of the above working steps, because the support frame 1 is constantly moving, and the above working steps also make the abutment plate 406 always in contact with the roof for support. If a sloping roof is encountered, the abutment plate 406 is first subjected to a pushing force from the first hydraulic jack 2 or the second hydraulic jack 304 at this time. Therefore, the abutment plate 406 will start to slide on the semicircular block 401 along with the slope of the roof. The abutment plate 406 drives the sliding arc block 405 to move synchronously. At the same time, the sliding arc block 405 drives the first sliding cylinder 404 to slide on the arc-shaped groove 403. Therefore, the sliding arc block 405 slides along the arc surface of the semicircular block 401 and the semicircular plate 402. At the same time, due to the characteristics of the crossheading, only forward movement is needed, and there is no need for left-right angle adjustment.

[0061] The working steps of the auxiliary support assembly 5 are as follows:

[0062] As mentioned above, when the abutment plate 406 tilts along with the slope of the roof, the abutment plate 406 drives the connecting column 501 to move synchronously. Again, because the connecting column 501 is rotationally connected with the rotating cylinder 502, the connecting column 501 always maintains a vertical downward trend due to its own gravity. At this time, the second sliding cylinder 504 also slides to the maximum extension limit inside the opening 503 due to its own gravity. Similarly, the second sliding cylinder 504 can contact the ground of the crossheading, thereby playing an auxiliary support role.

[0063] By adjusting the angle of the angle adjustment assembly 4 and the auxiliary support assembly 5, the flexible angle adjustment can be achieved, and the inclined roof can be closely fitted, eliminating the gap between the traditional support and the roof, avoiding local stress concentration caused by insufficient contact, and preventing roof fall caused by uneven stress. At the same time, under the action of the non-Newtonian fluid buffer bag 505, the roof can be assisted to support, and the load of the traditional support can also be shared. The vertical pressure of the roof and the shear force along the slope downward can be more evenly distributed to the support system, reducing the bearing pressure of the single support structure, and avoiding deformation and damage of the support components due to overload.

[0064] The working steps of the observation assembly 6 are as follows:

[0065] When the roof of the crossheading keeps horizontal, the ball 603 is inside the residual spherical groove 602 at this time. If the roof of the crossheading has a slope as mentioned above, the rotation of the resisting plate 406 drives the horizontal transparent tube 601 to move synchronously, and the ball 603 rolls in the inner cavity of the horizontal transparent tube 601 at this time. Therefore, the staff can know whether the roof is horizontal or has a slope at this time by observing the movement state of the ball 603.

[0066] The setting of the observation assembly 6 plays a role in that the staff can directly perceive whether the slope of the roof changes without the aid of complex tools, only by observing the rolling direction and position of the balance ball in the tube, and the subtle change of the roof slope has a directly observable and tangible embodiment, which can help the staff quickly understand the current state of the roof and provide an instant judgment for their adjustment of support and other operations.

[0067] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between or among such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0068] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, alternatives, and variations can be made in the embodiments without departing from the spirit and scope of the present application as defined by the appended claims and their equivalents.

Claims

1. A mobile coal mining support frame, comprising a support frame (1), wherein a fixed horizontal plate (101) is fixedly connected to the top of the support frame (1), and two sets of first hydraulic jacks (2) are symmetrically fixedly connected to the bottom of the fixed horizontal plate (101), wherein the number of first hydraulic jacks (2) in each set is not less than two, characterized in that: The support frame (1) is provided with an angle adjusting assembly (4), the angle adjusting assembly (4) comprises two semicircular blocks (401), the two semicircular blocks (401) are fixedly connected to the support frame (1), the side wall of each semicircular block (401) is fixedly connected with a semicircular plate (402), the outer arc surface of the two semicircular plates (402) is slidably connected with a sliding arc-shaped block (405), and the top of the sliding arc-shaped block (405) is fixedly connected with a contact plate (406). The support frame (1) is provided with a moving assembly (3), the moving assembly (3) comprises a T-shaped sliding plate (301), the T-shaped sliding plate (301) is slidably connected through the fixed transverse plate (101), and the middle part of the fixed transverse plate (101) is provided with a horizontal sliding groove (302). The support frame (1) is provided with an auxiliary supporting assembly (5), the auxiliary supporting assembly (5) comprises two groups of connecting columns (501), the number of each group of connecting columns (501) is not less than two, and each group of connecting columns (501) is fixedly connected to the top of the sliding arc-shaped block (405). The support frame (1) is provided with an observation assembly (6), and the observation assembly (6) comprises two transverse transparent tubes (601), and the side walls of the two transverse transparent tubes (601) are fixedly connected to the contact plate (406) in a symmetrical manner. The auxiliary supporting assembly (5) further comprises four rotating cylinders (502), each rotating cylinder (502) is rotatably connected to the outer side of the connecting column (501), each rotating cylinder (502) is internally provided with an opening (503), each opening (503) is slidably connected with a second sliding cylinder (504), and the opening (503) is provided with a non-Newtonian fluid buffer bag (505).

2. The mobile support bracket for coal mining operations of claim 1, wherein: The angle adjusting assembly (4) further comprises two arc-shaped grooves (403), each arc-shaped groove (403) is formed in the top of the semicircular plate (402), each arc-shaped groove (403) is in a penetrating structure, and each arc-shaped groove (403) is slidably connected with a first sliding cylinder (404).

3. The mobile support bracket for coal mining operations of claim 1, wherein: The moving assembly (3) further comprises two second hydraulic jacks (304), and the two second hydraulic jacks (304) are fixedly connected to the inner cavity top of the rectangular recess (303); the side walls of the T-shaped sliding plate (301) are fixedly connected with electric telescopic rods (305) in a symmetrical manner, and the telescopic shaft ends of each electric telescopic rod (305) are fixedly connected with fixed vertical plates (306).

4. The mobile support bracket for coal mining operations of claim 1, wherein: The observation assembly (6) further comprises two residual spherical grooves (602), each residual spherical groove (602) is formed in the inner cavity bottom of the transverse transparent tube (601), and the inner cavity of each transverse transparent tube (601) is slidably connected with a spherical body (603).

5. The mobile support bracket for coal mining operations of claim 1, wherein: The horizontal sliding groove (302) is slidably matched with the outer side of the T-shaped sliding plate (301).

6. The mobile support bracket for coal mining operations of claim 2, wherein: The top of two first sliding cylinders (404) is fixedly connected with the bottom of a sliding arc block (405).

7. The mobile support bracket for coal mining operations of claim 3, wherein: The top of each fixed vertical plate (306) is fixedly connected with the bottom of a fixed horizontal plate (101).

8. The mobile support bracket for coal mining operations of claim 4, wherein: The outer side of the second sliding cylinder (504) is slidingly matched with a rotating cylinder (502).

9. The mobile support bracket for coal mining operations of claim 4, wherein: Each ball (603) is slidingly matched with a residual spherical groove (602).

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