Split type anti-falling support for removing overhead roof area support

Abstract

The utility model relates to the technical field of coal mine underground support, in particular to a split type anti-falling support for removing overhead roof area support, which comprises a first support, a second support and a third support, the first support is provided with a left top beam and a right top beam which are arranged in parallel, and inner top adjusting jacks are arranged on the inner sides of the left top beam and the right top beam. The second support is embedded in the first support and comprises an inner top beam located between the left top beam and the right top beam, and the inner top adjusting jack can jack the inner top beam inwards. The pushing device is connected with the first support and the second support and can push the second support to stretch out of the interior of the first support so as to drive the inner top beam to move between the left top beam and the right top beam. The inner top adjusting jacks are respectively arranged on the inner sides of the left top beam and the right top beam and can be propped against the inner top beam of the second bracket. The overall stability of the support is guaranteed through the clamping effect, and the problem that the support topples over due to horizontal lateral force applied by a roadway top plate is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine underground support especially relates to a split type anti-inclination support for removing support empty roof area support. BACKGROUND

[0002] When the coal mine underground recovery working face reaches the end, the working face support must be removed in order and safely transferred to the new working face for continuous operation. The traditional operation method usually involves deploying 3 to 4 shield supports at one end of the working face, which are vertically arranged with the working face support to be removed. At the same time, in order to assist the removal of the support, the working face is equipped with a winch, and the working face support is removed one by one by using the pulley system fixed on the shield support.

[0003] However, during this removal process, a significant problem arises: the vertical intersection of the working face support to be removed and the shield support forms an unavoidable empty roof area. In order to ensure that the support can be safely and smoothly removed, the empty roof area below must be effectively supported. Unfortunately, due to the relatively narrow space of the empty roof area, large integrated supports cannot be installed in place, and in the coordinated operation with the working face support, they cannot achieve rapid forward movement, thus seriously affecting the removal efficiency of the support.

[0004] In view of this problem, the existing technology gradually tends to use split type small and medium sized supports with forward movement function. These supports are small in size, flexible and easy to move, and can theoretically better adapt to the support requirements of narrow spaces. However, in actual application, these small and medium sized split type supports often cannot withstand the complex and variable stress conditions such as roof falling and collapse. Especially when facing the lateral force generated by the caving rock in the goaf, the support is prone to incline during forward movement, which not only may cause equipment damage and huge economic loss, but also may pose a serious threat to the life safety of the operating personnel.

[0005] Therefore, it has become a key problem to be solved in the current coal mining field to develop a split type support that can effectively prevent incline and provide good support effect in narrow empty roof area. UTILITY MODEL CONTENT

[0006] (I) Technical problem to be solved

[0007] The utility model provides a split type anti-inclination support for removing support empty roof area support, which solves the problem of easy incline during forward movement of the empty roof area support caused by the collapse of the goaf during the removal of the support.

[0008] (II) Technical scheme

[0009] In order to achieve the above object, the utility model provides a split type anti-inclination support for support of goaf top area, include: first support, with parallel and parallel left roof beam and right roof beam are provided with inside roof adjusting jack in the inside of left roof beam, right roof beam,

[0010] Second support, nested in the inside of first support, and including the inside roof beam between left roof beam and right roof beam, inside roof adjusting jack can be inwards and tighten inside roof beam,

[0011] Pushing device, connect first support and second support, and can push second support from the inside of first support and stretch out, to drive inside roof beam moves between left roof beam and right roof beam.

[0012] Further technical scheme lies in, left roof beam and right roof beam are connected through dumbbell box, the upper portion of dumbbell box is provided with the fender, the outside of left roof beam is provided with outside roof adjusting jack, outside roof adjusting jack can stretch out outward and lean on the shield support of non goaf side.

[0013] Further technical scheme lies in, first support still include first base and four first hydraulic column,

[0014] First base has U type box structure, and the open end is towards second support setting,

[0015] Every first hydraulic column is connected with the top of first base, and the other end is connected with the bottom of left roof beam or right roof beam,

[0016] The opening is provided with pushing device, pushing device is connected with second support, for realizing the pushing of first support to second support and the pulling action of second support to first support.

[0017] Further technical scheme lies in, second support still include second base and second hydraulic column,

[0018] Second base has I beam structure, the upper horizontal beam of I beam is provided with limiting hole through assembly structure, second hydraulic column passes through limiting hole, and one end is connected to the top of second base, and the other end is connected to the bottom of inside roof beam,

[0019] Pushing device can drive second base reciprocatingly moves, and drives inside roof beam reciprocatingly moves between left roof beam and right roof beam.

[0020] Further technical scheme lies in, pushing device includes pushing cylinder and pushing rod setting in the output end of pushing cylinder,

[0021] The push oil cylinder is fixedly installed at the bottom of the opening of the U-shaped box body, and one end of the push rod away from the push oil cylinder is hinged to the second base of the second support.

[0022] The further technical scheme is characterized in that during the process that the push device drives the second support to move forward to the maximum position, the inner top beam always overlaps with the left top beam and the right top beam, and can abut against the inner top adjusting jack.

[0023] The further technical scheme is characterized in that the top of the left top beam and the right top beam is wedge-shaped.

[0024] The further technical scheme is characterized in that a side protection mechanism is arranged on the front side of the inner top beam for temporary support when the inner support moves forward, a protection plate is arranged on the right side of the right top beam, and a protection plate is arranged on the left side of the left top beam.

[0025] The further technical scheme is characterized in that the further technical scheme is characterized in that further comprising a shield beam, the shield beam is connected to the side away from the second support of the first support through a connecting rod mechanism, and the included angle with the horizontal plane can be adjusted.

[0026] The further technical scheme is characterized in that further comprising a hydraulic system for driving the first hydraulic column, the second hydraulic column, the push oil cylinder, the inner top adjusting jack and the outer top adjusting jack.

[0027] (Three) beneficial effects

[0028] In the utility model, the first support and the second support are connected through nested combination, and under the driving of the push device, the second support can be stretched out from the inside of the first support to drive the inner top beam to move forward between the left top beam and the right top beam; when the second support is in place, the first support can be pulled forward through the push device to complete a working cycle. This process not only realizes the timely support of the empty top area formed by the vertical intersection of the working face support and the shield support, but also greatly improves the safety when the working face support is withdrawn. During the process that the second support moves forward, the inner top adjusting jack is arranged on the inner side of the left and right top beams of the first support respectively, and the inner top beam of the second support can be moderately clamped, and the moderate clamping effect ensures the stability of the second support during the forward movement; when the first support is pulled forward under the action of the push mechanism, the top adjusting jacks on the inner sides of the left and right top beams of the first support can abut against the side surface of the top beam of the second support, effectively avoiding the problem of tilting caused by the lateral force due to the collapse of the roadway roof. When the first support and the second support are in place and start to support, the inner top adjusting jack can continuously abut against the inner top beam of the second support, further enhancing the stability of the whole support. In addition, the nested connection of the first support and the second support also saves the occupied space of the whole support, and the compact structure makes the support more convenient during transportation and installation. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The installation plane layout diagram of the split anti-falling support for roadway support;

[0030] Figure 2 The overall structure diagram of the split anti-falling support for roadway support;

[0031] Figure 3 The top view diagram of Figure 2 ;

[0032] Figure 4 The specific structure diagram of the left and right roof beams of the first support;

[0033] Figure 5 The cross-sectional view diagram of Figure 4 at A;

[0034] Figure 6 The diagram of the opening support structure of the second support.

[0035] REFERENCE SIGNS

[0036] 1: first support; 11: right roof beam; 12: left roof beam; 13: first base; 14: first hydraulic column; 15: shield beam; 2: second support; 21: inner roof beam; 22: second base; 23: second hydraulic column; 3: pushing device; 31: pushing oil cylinder; 4: inner roof adjusting jack; 5: outer roof adjusting jack; 6: dumbbell box; 7: shield support; 8: wedge-shaped roof; 9: support mechanism; 10: working face support. DETAILED DESCRIPTION

[0037] In order to better explain the utility model, so as to facilitate understanding, the following will be combined with the drawings, through specific embodiments, the utility model is described in detail.

[0038] The embodiment provides a split anti-falling support for withdrawing support in the empty roof area, as shown in Figures 1-5 , comprising: a first support 1, having a left roof beam 12 and a right roof beam 11 which are arranged in parallel and side by side, and the inner side of the left and right roof beams 11 is provided with an inner roof adjusting jack 4; a second support 2, nested in the first support 1, comprising an inner roof beam 21 between the left roof beam 12 and the right roof beam 11, and the inner roof adjusting jack 4 can be tightened to the inner roof beam 21; a pushing device 3, connected with the first support 1 and the second support 2, and capable of pushing the second support 2 to extend from the inside of the first support 1, so as to drive the inner roof beam 21 to move between the left roof beam 12 and the right roof beam 11.

[0039] In the above scheme, the first support 1 adopts a split roof beam and semi-steel base form, and the second support 2 is installed at the middle front part of the first support 1. This nested combination form saves the occupied space of the whole support. The second support 2 adopts a unit frame form as a whole, which is simple and compact in structure and improves the stability of the support. The first support 1 and the second support 2 are nested and combined, and under the driving of the pushing device 3, the second support 2 extends out of the first support 1, drives the inner roof beam 21 to move forward between the left roof beam 12 and the right roof beam 11, supports the empty roof area formed by the vertical intersection of the working face support 10 and the shield support 7, and improves the safety when the working face support 10 is withdrawn. When the first support 1 is lowered, the inner roof adjusting jack 4 is in abutment with the inner roof beam 21 of the second support 2, thereby ensuring the stability of the first support 1 during the lowering process. When the second support 2 is in place and starts to support, the inner roof adjusting jack 4 can continuously abut against the inner roof beam 21, which can effectively avoid the problem of tilting caused by the horizontal lateral force exerted on the first support 1 and the second support 2 by the collapsed rock in the goaf.

[0040] In summary, the scheme of the above embodiment realizes effective support of the empty roof area formed by the vertical intersection of the working face support 10 and the shield support 7, improves safety, saves space, enhances the stability of the support, and has significant technical advantages and application prospects.

[0041] Further, in the embodiment, the left roof beam 12 and the right roof beam 11 are connected through the dumbbell box body 6, the upper part of the dumbbell box body 6 is provided with a guard plate, the outer side of the left roof beam 12 is provided with an outer roof adjusting jack 5, and the outer roof adjusting jack 5 can extend outward and abut against the shield support 7 on the non-gob side.

[0042] Specifically, the dumbbell box body 6 is connected with the left and right roof beams 11 through a pin shaft, which facilitates installation and disassembly and is high in maintenance efficiency. The left outer side of the first support 1 is provided with double outer roof adjusting jacks 5 (satisfying left-right interchangeability), which are installed on the side close to the shield support 7 (the non-gob side) and can extend by 300 mm. When the outer roof adjusting jacks 5 extend, they can be supported on the outer side of the shield support 7, thereby enhancing the anti-falling capability of the first support 1.

[0043] In the embodiment, the first support 1 further includes a first base 13 and four first hydraulic columns 14. Specifically, the first base 13 has a U-shaped box structure, and the open end is arranged to face the second support 2. One end of each first hydraulic column 14 is connected with the top of the first base 13, and the other end is connected with the bottom of the left or right roof beam 11. The pushing device 3 is arranged in the opening, and the pushing device 3 is connected with the second support 2 and used to realize the extension of the second support 2 relative to the first support 1 and the pulling action of the first support 1.

[0044] The first base 13 adopts a U-shaped box structure, which not only increases the strength and rigidity of the base and enables it to bear greater load, but also effectively disperses pressure and improves the stability of the entire support system. Meanwhile, one end of the four first hydraulic columns 14 is connected with the top of the first base 13, and the other end is connected with the bottom of the left and right top beams 11. This multi-point connection mode further enhances the fault tolerance of the support system and effectively avoids the safety problem of a single column support in the case of hydraulic failure. The U-shaped box structure with an open end facing the second support 2 provides sufficient installation space for the pushing device 3. The pushing device 3 is connected with the second support 2 and can realize the pushing out of the first support 1 to the second support 2 and the pulling in of the second support 2 to the first support 1, so that the support system can flexibly adjust the support position according to actual needs.

[0045] In the embodiment, the second support 2 further includes a second base 22 and a second hydraulic column 23. Specifically, the second base 22 has an I-beam structure, and a limiting hole is arranged at the upper horizontal beam of the I-beam through an assembly structure. The assembly structure can be a conventional column clamping and fixing structure. The second hydraulic column 23 passes through the limiting hole and is connected to the top of the second base 22 at one end and to the bottom of the inner top beam 21 at the other end. The pushing device 3 can drive the second base 22 to move back and forth and drive the inner top beam 21 to move back and forth between the left top beam 12 and the right top beam 11. The second base 22 adopts an I-beam structure, which can bear greater load and improve the stability of the entire support system. The second hydraulic column 23 passes through the limiting hole and is connected between the base and the inner top beam 21. This connection mode further enhances the stability of the second hydraulic column 23 and ensures the stability of the second support 2 when pulling the first support 1.

[0046] Specifically, the pushing device 3 includes a pushing oil cylinder 31 and a pushing rod arranged at the output end of the pushing oil cylinder 31. The pushing oil cylinder 31 is fixedly installed at the bottom of the opening of the U-shaped box, and the end of the pushing rod away from the pushing oil cylinder 31 is hinged to the second base 22 of the second support 2. This hinged mode enables the pushing rod to produce a certain rotation angle when pushing the second support 2, thereby adapting to the movement demand under different working conditions.

[0047] In the embodiment, when the pushing device 3 drives the second support 2 to move forward to the maximum position, the inner top beam 21 always overlaps with the left and right top beams 11 and can be topped by the inner top jack 4.

[0048] In the embodiment, the top of the left top beam 12 and the top of the right top beam 11 each have a wedge-shaped roof 8 for better adaptation to the lateral force generated by the caving-in side roof of the goaf.

[0049] In combination Figure 6As shown, in this embodiment, the front side of the inner roof beam 21 is provided with a support mechanism 9 for temporary support when the inner support moves forward.

[0050] In this embodiment, the right side of the right roof beam 11 is provided with a protective plate to prevent the collapsed coal gangue in the goaf from entering the support; the left side of the left roof beam 12 is provided with a protective plate to prevent the support from being scratched when it moves forward.

[0051] In this embodiment, it also includes a shield beam 15 connected to the side of the first support 1 away from the second support 2 through a connecting rod mechanism and capable of adjusting the included angle with the horizontal plane. By adjusting the included angle of the shield beam 15 with the horizontal plane, the lifting height of the support can be adjusted, and at the same time, the impact damage of the collapsed working face roof rock to the support can be avoided.

[0052] In this embodiment, it also includes a hydraulic system for driving the first hydraulic column 14, the second hydraulic column 23, and the push cylinder 31, the inner roof adjusting jack 4, and the outer roof adjusting jack 5.

[0053] The specific support method of the split anti-falling support for removing the support in the goaf in the above embodiment is as follows: first, place the anti-falling support described in the embodiment in the goaf formed by the vertical connection of the working face support 10 and the shield support 7, and form an effective support. Then, drive the second hydraulic column 23 to descend and the push cylinder 31 to extend by controlling the hydraulic system, and the push cylinder 31 drives the second support 2 to move forward to the position where it is connected with the working face support 10. During this process, the inner roof adjusting jack 4 extends a certain length to limit the movement direction of the inner roof beam 21 and prevent it from swinging. When the second support 2 is in place, the second hydraulic column 23 is raised until the inner roof beam 21 is tightly pressed against the roadway roof, at which time the inner roof adjusting jack 4 continuously presses the inner roof beam 21 to ensure the stability of the overall structure and prevent the support from falling due to the collapse of the roof. Then, drive the first hydraulic column 14 to descend by controlling the hydraulic system, and the push cylinder 31 is retracted, and the inner roof adjusting jack 4 is appropriately loosened, and the second support 2 pulls the first support 1 to move forward, and after the first support 1 is moved into place, the first hydraulic column 14 is raised until the left and right roof beams 11 are tightly pressed against the roadway roof, and the inner roof adjusting jack 4 continues to press the inner roof beam 21. At the same time, the outer roof adjusting jack 5 extends and tightly presses the roof beam of the shield support 7. Ensure the stability of the entire support. At this time, the working face support 10 to be removed can be removed. Then repeat the above steps until all the working face supports 10 are removed.

[0054] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative positional relationship and movement between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0055] In addition, the descriptions such as "first", "second", etc. in the present embodiment are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0056] In the present embodiment, unless otherwise explicitly specified and limited, the terms "connection", "fixation", etc. should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0057] It should be understood that the above description of the specific embodiments of the present application is only for the purpose of illustrating the technical route and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, but the present application is not limited to the above specific implementation. Any changes or modifications made within the scope of the claims of the present application should be covered within the protection scope of the present application.

Claims

1. A split type anti-collapse support for withdrawing the support of a top zone of a roof, characterized in that, include: The first support (1) has a right top beam (11) and a left top beam (12) arranged in parallel, and an inner top adjusting jack (4) is provided on the inner side of the right top beam (11) and the left top beam (12); The second support (2) is nested inside the first support (1) and includes an inner top beam (21) located between the right top beam (11) and the left top beam (12). The inner top adjusting jack (4) can push the inner top beam (21) inward. The pushing device (3) connects the first bracket (1) and the second bracket (2) and is capable of pushing the second bracket (2) out of the first bracket (1) to drive the inner top beam (21) to move between the right top beam (11) and the left top beam (12).

2. The split-type anti-tipping support for the unsupported area during scaffold removal as described in claim 1, characterized in that, The right top beam (11) and the left top beam (12) are connected by a dumbbell box (6). A protective plate is provided on the top of the dumbbell box (6). An external top adjustment jack (5) is provided on the outside of the right top beam (11) and the left top beam (12). The external top adjustment jack (5) can extend outward and abut against the shield support (7) on the non-mining area side.

3. The split-type anti-tipping support for the unsupported roof area during scaffold removal as described in claim 2, characterized in that, The first support (1) also includes a first base (13) and four first hydraulic columns (14); The first base (13) has a U-shaped box structure, and the open end is set towards the second bracket (2); One end of each of the first hydraulic columns (14) is connected to the top of the first base (13), and the other end is connected to the bottom of the right top beam (11) or the left top beam (12); The pushing device (3) is provided in the opening. The pushing device (3) is connected to the second bracket (2) and is used to realize the pushing action of the first bracket (1) to the second bracket (2) and the pulling action of the second bracket (2) to the first bracket (1).

4. The split-type anti-tipping support for the unsupported area during scaffold removal as described in claim 3, characterized in that, The second bracket (2) also includes a second base (22) and a second hydraulic column (23); The second base (22) has an I-beam structure. A limiting hole is provided at the upper horizontal beam of the I-beam through the assembly structure. The second hydraulic column (23) passes through the limiting hole and is connected at one end to the top of the second base (22) and at the other end to the bottom of the inner top beam (21). The pushing device (3) can drive the second base (22) to move back and forth, and drive the inner top beam (21) to move back and forth between the right top beam (11) and the left top beam (12).

5. The split-type anti-tipping support for the unsupported area during scaffold removal as described in claim 4, characterized in that: The pushing device (3) includes a pushing cylinder (31) and a pushing rod disposed at the output end of the pushing cylinder (31); The push cylinder (31) is fixedly installed at the bottom of the opening of the U-shaped box, and the end of the push rod away from the push cylinder (31) is hinged to the second base (22) of the second bracket (2).

6. The split-type anti-tipping support for the unsupported area during scaffold removal as described in claim 1, characterized in that, As the pushing device (3) drives the second support (2) to move forward to the maximum position, the inner top beam (21) always overlaps with the right top beam (11) and the left top beam (12), and can be pushed against the inner top adjusting jack (4).

7. The split-type anti-tipping support for the unsupported roof area during scaffold removal as described in claim 1, characterized in that, The top of both the right top beam (11) and the left top beam (12) has a wedge-shaped top (8).

8. The split-type anti-tipping support for the unsupported roof area during scaffold removal as described in claim 1, characterized in that, A support mechanism (9) is provided on the front side of the inner top beam (21) for temporary support when the internal support moves forward. A protective plate is provided on the right side of the right top beam (11) and an anti-scratching plate is provided on the left side of the left top beam (12).

9. The split-type anti-tipping support for the unsupported area during scaffold removal as described in claim 1, characterized in that, It also includes a protective beam (15), which is connected to the side of the first support (1) away from the second support (2) by a linkage mechanism and can adjust the angle with the horizontal plane.

10. The split-type anti-tipping support for the unsupported roof area during scaffold removal as described in claim 5, characterized in that, It also includes a hydraulic system for driving the first hydraulic column (14), the second hydraulic column (23), the push cylinder (31), the inner top adjusting jack (4) and the outer top adjusting jack (5).

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