Coal seam shield support pushing device

Abstract

The utility model provides a coal seam shield support pushing device. The coal seam shield support pushing device comprises a first pulling beam, a connecting rod, a pulling chain, at least three supports to be removed, a second pulling beam, at least two shield supports and a controller. The first pulling beam is connected with the second pulling beam, and the support to be withdrawn and the shield support are each provided with a first telescopic assembly and a second telescopic assembly. The first telescopic rod of the to-be-withdrawn support close to the shield support is connected with the first pulling beam through a pulling chain, and the first telescopic rods of the other two to-be-withdrawn supports are connected with the first pulling beam through connecting rods; the shield support is connected with the second pulling beam. A distance sensor is arranged on the support to be withdrawn, and a pressure sensor is arranged on the top face of the shield support. The first telescopic assembly, the second telescopic assembly, the distance sensor and the pressure sensor are connected with the controller. The controller can control the first telescopic rods of the to-be-withdrawn support and the shield support to be withdrawn, and then the to-be-withdrawn support and the shield support can be pulled and moved so that the support in the roadway can be conveniently withdrawn.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine roadway auxiliary device, and particularly relates to a coal seam shield support pushing device. BACKGROUND

[0002] After the coal mining face stops production, the equipment such as the working face support needs to be removed, especially the removal of the hydraulic shield support of the coal seam fully mechanized working face is an important link of the removal of the whole equipment. At present, the removal of the shield support mostly adopts the method of replacing the lifting shed support with the shield support to maintain the roof of the removed space. After each hydraulic support is removed, the shield support is pulled forward once. This method has high safety and reliability in maintaining the roof, and is widely used.

[0003] However, when the hydraulic support is removed by using this method, the pulling out of the removed support and the forward movement of the shield support are both pulled by the winch and the guide pulley. Because the support is heavy, the roof pressure and the floor resistance are large, the load of the winch is too high, and when the roadway environment is complex, the wire rope of the winch is inevitably broken, which has high risk coefficient. Moreover, the personnel who pull the wire rope of the winch and hang the guide pulley consume a lot of physical strength, and it is time-consuming and laborious, so that the removal of the shield support in the coal mine roadway is difficult. CONTENT OF THE INVENTION

[0004] The present application provides a coal seam shield support pushing device to solve the problem of difficult removal of the shield support in the coal mine roadway.

[0005] The present application provides a coal seam shield support pushing device, which comprises a first pulling beam, a connecting rod, a pulling chain, at least three supports to be removed, a second pulling beam, at least two shield supports and a controller.

[0006] One end of the first pulling beam is detachably connected with one end of the second pulling beam, and the first pulling beam and the second pulling beam are cross-connected. The first pulling beam is perpendicular to the support to be removed, and the second pulling beam is perpendicular to the shield support.

[0007] The support to be removed and the shield support are both provided with a first telescopic component and a second telescopic component. The first telescopic component comprises a first telescopic rod, and the second telescopic component comprises a second telescopic rod.

[0008] The first telescopic rod of the support to be removed close to the shield support is connected with the first pulling beam through the pulling chain, and the first telescopic rods of the other two supports to be removed are connected with the first pulling beam through the connecting rod. The shield support is connected with the second pulling beam through the first telescopic rod.

[0009] The distance sensor is arranged on the support to be removed, and the top surface of the shield support is provided with a pressure sensor; the first telescopic component, the second telescopic component, the distance sensor and the pressure sensor are in communication connection with the controller.

[0010] Optionally, the support to be removed is perpendicular to the side surface of the coal wall, and the shield support is parallel to the side surface of the coal wall.

[0011] Optionally, the push-pull rod is further included, one end of the push-pull rod is hinged to the first telescopic rod of the shield support, and the other end of the push-pull rod is detachably connected to the top surface of the second pull-out beam; the controller is further configured to:

[0012] acquire the pressure value of the shield support and the top surface of the coal wall, and send a recovery signal to the push-pull rod when the pressure value is less than a pressure threshold value, so as to control the pull rod of the push-pull rod to be retracted.

[0013] Optionally, the length of the first pull-out beam is greater than three times the width of the support to be removed; and the length of the second pull-out beam is greater than three times the width of the shield support.

[0014] Optionally, the connecting seat is further included, the connecting seat is detachably connected to the top surface of the first pull-out beam; the first telescopic rod of the support to be removed close to the shield support is connected to one of the connecting seats through the pull-out chain, and the first telescopic rods of the other two supports to be removed are connected to the other two connecting seats through the connecting rod.

[0015] Optionally, the connecting seat includes a bottom plate and a vertical plate, the vertical plate is in L-shaped structure, one end of the vertical plate is connected to the bottom plate, and the other end of the vertical plate exceeds the side surface of the first pull-out beam.

[0016] Optionally, the connecting hole is arranged on the top surface of the first pull-out beam, the connecting seat is detachably connected to the first pull-out beam through the connecting hole, and the connecting hole is a long slot.

[0017] Optionally, the end of the vertical plate away from the bottom plate is provided with a pin shaft, and the connecting rod is hinged to the connecting seat through the pin shaft.

[0018] Optionally, the pin shaft includes a baffle, a shaft body and a limiting block, the shaft body is arranged on the side surface of the baffle, the end of the shaft body away from the baffle is provided with a groove, the limiting block is arranged in the groove, and the limiting block is hinged to the shaft body.

[0019] The application provides a coal seam shield support pushing device, which comprises a first pulling beam, a connecting rod, a pulling chain, at least three support to be removed, a second pulling beam, at least two shield supports and a controller. One end of the first pulling beam is connected with one end of the second pulling beam, the support to be removed and the shield support are provided with a first telescopic assembly and a second telescopic assembly, the first telescopic assembly comprises a first telescopic rod, and the second telescopic assembly comprises a second telescopic rod. The first telescopic rod of the support to be removed close to the shield support is connected with the first pulling beam through the pulling chain, and the first telescopic rods of the other two supports to be removed are connected with the first pulling beam through the connecting rod; the shield support is connected with the second pulling beam through the first telescopic rod. A distance sensor is arranged on the support to be removed, and a pressure sensor is arranged on the top surface of the shield support; the first telescopic assembly, the second telescopic assembly, the distance sensor and the pressure sensor are respectively in communication connection with the controller. The controller can control the first telescopic rods of the support to be removed and the shield support to be withdrawn, the device fixes the first pulling beam through two supports to be removed, and then pulls the other support to be removed by means of the first pulling beam, the support to be removed in the roadway is ingeniously used to pull the support to be removed adjacent to the support to be removed, the support to be removed in the roadway can be conveniently removed, and the problem that the shield support in the coal mine roadway is difficult to remove is solved. Meanwhile, the shield support is arranged, effective support can be provided for the coal wall top surface in the removal process, the coal wall top surface does not need to be supported by the top plate of the support to be removed, the support to be removed can be conveniently removed, and the safety in the operation process can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0021] Figure 1 A top view structural schematic diagram of the coal seam shield support pushing device is provided for the embodiments of the application.

[0022] Figure 2 A first pulling beam and a second pulling beam connection structural schematic diagram is provided for the embodiments of the application.

[0023] Figure 3 A connecting seat structural schematic diagram is provided for the embodiments of the application.

[0024] Figure 4 A pin shaft structural schematic diagram is provided for the embodiments of the application.

[0025] ILLUSTRATION:

[0026] Wherein, 1-first pull beam; 2-connecting rod; 3-pull chain; 4-to-be-removed support; 5-second pull beam; 6-pull rod; 7-shield support; 8-connecting seat; 9-pivot; 91-shaft body; 92-limiting block; 11#, 12#, 13#-to-be-removed support; 21#, 22#, 23-shield support. DETAILED DESCRIPTION

[0027] The embodiments will be described in detail below with reference to examples thereof as illustrated in the accompanying drawings. In the following description, same numbers in different drawings represent same or similar elements unless otherwise represented. The embodiments described in the following examples do not represent all the implementations consistent with the present application. They are merely examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0028] When the hydraulic shield support of the fully mechanized coal mining face is removed, the pull-out of the to-be-removed support and the forward movement of the shield support are both performed by the winch plus the guide pulley. Because the support is heavy, the roof pressure and the floor resistance are large, the load bearing of the winch is too high, and when the roadway environment is complex, the wire rope of the winch is inevitably broken, the risk coefficient is relatively high; and the personnel who pull the wire rope of the winch, hang the guide pulley and the like consume a lot of physical strength, and it is time-consuming and laborious, so that the removal of the shield support in the coal mine roadway is difficult.

[0029] To solve the problem of difficult removal of the shield support in the coal mine roadway, the embodiment of the present application provides a shield support moving device for coal seam, referring to Figure 1 , the device comprises a first pull beam 1, a connecting rod 2, a pull chain 3, at least three to-be-removed supports 4, a second pull beam 5, at least two shield supports 7 and a controller, and the controller is not shown because it can be installed at other positions except the first pull beam 1 and the second pull beam 5. Wherein, Figure 1 The serial numbers 11#, 12#, 13# in the above formula are the to-be-removed supports 4, and the serial numbers 21#, 22#, 23# are the shield supports 7. Here, the to-be-removed supports 4 and the shield supports 7 need to be explained respectively. When the hydraulic support is removed, in order to maintain the coal wall top surface and prevent the coal seam of the top surface from falling off to cause danger, the coal wall top surface needs to be supported. In the embodiment of the present application, before the hydraulic support is removed, the to-be-removed support 4 is turned by the wire rope, so that the to-be-removed support 4 is parallel to the length direction of the roadway, to support the coal wall top surface at the innermost side of the roadway. At this time, the to-be-removed support 4 after turning is the shield support 7.

[0030] Referring to Figure 2In some embodiments, the first pull-out beam 1 and the second pull-out beam 5 can be modified from standard channel steel, and one end of the first pull-out beam 1 is detachably connected to one end of the second pull-out beam 5, for example, by bolts. The first pull-out beam 1 and the second pull-out beam 5 are cross-connected, and in some embodiments, for the convenience of assembly, the first pull-out beam 1 and the second pull-out beam 5 can be arranged vertically, so that the first pull-out beam 1 is perpendicular to the support 4 to be removed, and the second pull-out beam 5 is perpendicular to the shield support 7, that is, the first pull-out beam 1 is arranged along the length direction of the roadway and parallel to the side of the coal wall, and the second pull-out beam 5 is arranged along the width direction of the roadway and perpendicular to the side of the coal wall.

[0031] The support 4 to be removed and the shield support 7 are both provided with a first telescopic assembly and a second telescopic assembly, the first telescopic assembly includes a first telescopic rod, and the second telescopic assembly includes a second telescopic rod. The first telescopic assembly is used to extend or retract the roof in the horizontal direction, that is, to change the length of the roof, and the second telescopic assembly is used to lift the roof in the height direction, that is, to change the height of the roof. The support 4 to be removed, the shield support 7, the first telescopic assembly and the second telescopic assembly can all be obtained by the prior art, and the present application will not be described in detail.

[0032] The first telescopic rod of the support 4 to be removed close to the shield support 7 is connected to the first pull-out beam 1 through the pull-out chain 3, and the first telescopic rods of the other two supports 4 to be removed are connected to the first pull-out beam 1 through the connecting rods 2. Figure 1 For example, the device includes at least three supports 4 to be removed, 11# support to be removed, 12# support to be removed and 13# support to be removed, wherein the 11# support to be removed is connected to the first pull-out beam 1 through the pull-out chain 3, and the 12# support to be removed and the 13# support to be removed are connected to the first pull-out beam 1 through two connecting rods 2.

[0033] When the first telescopic rod of the first telescopic assembly is extended, the first pull-out beam 1 is fixed by the 12# support to be removed and the 13# support to be removed through the connecting rods 2 and the first telescopic rod, at this time, the first telescopic rod of the 11# support to be removed is retracted, that is, the 11# support to be removed is pulled towards the first pull-out beam 1, so that the support 4 to be removed is removed from the original position, and then the 11# support to be removed is turned through the steel wire rope, the connection between the pull-out chain 3 and the 11# support to be removed is removed, and the connection between the connecting rods 2 and the 12# support to be removed and the 13# support to be removed is removed, so that the 11# support to be removed is removed. It can be understood that since only one support 4 to be removed is used to fix the first pull-out beam 1, it is possible that the support 4 to be removed connected to the pull-out chain 3 cannot be effectively pulled out, therefore, the supports 4 to be removed connected to the first pull-out beam 1 are at least three.

[0034] It should be noted that, due to the different widths of the roadway, the length of the connecting rod 2 is also different, when the length of the connecting rod 2 is longer, it is possible that the 11# support to be removed cannot be completely pulled to the position where it can be turned by one time of pulling, by setting the pulling chain 3, after the first pulling is completed, the length of the pulling chain 3 is adjusted, and the 11# support to be removed can be pulled again. And the soft connection mode can adapt to the complex roadway environment and uneven floor conditions. During the pulling process, even if the local deformation of the roadway or the floor is encountered, the pulling chain 3 can still maintain stable connection, avoiding damage or pulling failure of the support caused by hard connection.

[0035] The shield support 7 is connected with the second pulling beam 5 through the first telescopic rod, and the number of the shield support 7 is at least two, and in some embodiments, the number of the shield support 7 can be three, so as to better support the coal wall top surface. Figure 1 For example, when the shield support 7 is removed, since the second pulling beam 5 has been fixed by the first pulling beam 1, the first telescopic rod of the shield support 7 is controlled to retract, and the 21# shield support, the 22# shield support and the 23# shield support can be pulled out. In some embodiments, the 21# shield support can be first pulled out, and then the 22# shield support and the 23# shield support can be pulled out.

[0036] The support to be removed 4 is provided with a distance sensor, and the top surface of the shield support 7 is provided with a pressure sensor, and the first telescopic assembly, the second telescopic assembly, the distance sensor and the pressure sensor are respectively in communication connection with the controller. The controller is used for: sending a recovery signal to the first telescopic assembly of the support to be removed 4 close to the shield support 7, so as to control the first telescopic rod of the support to be removed 4 to retract; obtaining the distance value of the same support to be removed 4 and the coal wall side surface; when the distance value is less than the distance threshold value, sending a recovery signal to the second telescopic assembly of the same support to be removed 4, so as to control the second telescopic rod to retract; obtaining the local area network signal of the support to be removed 4, and when the local area network signal is not in the working area, sending a recovery signal to the first telescopic assembly of the shield support 7, so as to control the first telescopic rod of the shield support 7 to retract; obtaining the pressure value of the shield support 7 and the coal wall top surface, and when the pressure value is less than the pressure threshold value, sending a recovery signal to the first telescopic assembly of the next support to be removed 4 after a preset time.

[0037] In the working process, the first telescopic rod of the first telescopic assembly of the support to be removed 4 in the coal mine tunnel is in the initial state of extension, and thus the controller sends a recovery signal to the first telescopic assembly of the support to be removed 4 close to the shield support 7. After the first telescopic rod is recovered, the support to be removed 4 is pulled to the side of the coal wall. If the distance between the support to be removed 4 and the side of the coal wall is less than the distance threshold, the support to be removed 4 can be turned by a steel wire rope and removed from the tunnel. At this time, the second telescopic rod of the support to be removed 4 can be recovered because the shield support 7 is arranged in the tunnel, the roof of the support to be removed 4 is separated from the top surface of the coal wall, and the support to be removed 4 can be conveniently removed. When the local area network signal of the removed support to be removed 4 is not in the working area, it is indicated that the support to be removed 4 has been completely removed, and the shield support 7 can be pulled and moved. After the shield support 7 is pulled and moved, the environment of the top surface of the coal wall can be changed, and thus it is necessary to detect the pressure value of the shield support 7 and the top surface of the coal wall. When the pressure value is less than the pressure threshold, it is indicated that the top surface of the coal wall is not collapsed or the coal seam is not separated, and the next support to be removed 4 can be removed. Before the next support to be removed 4 is removed, the pulling and moving chain 3 needs to be connected with the next support to be removed 4, and the connecting rod 2 needs to be connected with the other two supports to be removed 4. Thus, the controller sends a recovery signal to the first telescopic assembly of the next support to be removed 4 after a preset time.

[0038] The pulling and moving device provided in the embodiment of the present application fixes the first pulling and moving beam 1 by two supports to be removed 4, pulls and moves the other support to be removed 4 by the first pulling and moving beam 1, ingeniously uses the support to be removed 4 in the tunnel to pull and move the support to be removed 4 adjacent to the support to be removed 4, conveniently removes the support in the tunnel, and solves the problem of difficulty in removing the shield support in the coal mine tunnel. Meanwhile, the shield support 7 is arranged, effective support is provided for the top surface of the coal wall in the removal process, the top surface of the coal wall is not supported by the roof of the support to be removed 4, the support to be removed 4 is conveniently removed, and the safety in the working process is improved.

[0039] Referring again to Figure 1 In some embodiments, the device further includes a push-pull rod 6. The push-pull rod 6 can be an electric push-pull rod. One end of the push-pull rod 6 is hinged to the first telescopic rod of the shield support 7, and the other end of the push-pull rod 6 is detachably connected to the top surface of the second pulling and moving beam 5. By arranging the push-pull rod 6, the pulling and moving distance of the shield support 7 can be increased. The controller is further configured to acquire the pressure value of the shield support 7 and the top surface of the coal wall, and send a recovery signal to the push-pull rod 6 when the pressure value is less than the pressure threshold, so as to control the pull rod of the push-pull rod 6 to be recovered.

[0040] In order to provide an installation space, the length of the first pulling and moving beam 1 is greater than three times the width of the support to be removed 4; and the length of the second pulling and moving beam 5 is greater than three times the width of the shield support 7.

[0041] In some embodiments, the device further comprises a connecting seat 8 which is detachably connected to the top surface of the first moving beam 1, wherein the first telescopic rod of one of the supports to be removed 4 is connected to one of the connecting seats 8 through the moving chain 3, and the first telescopic rod of the other support to be removed 4 is connected to the other connecting seat 8 through the connecting rod 2. See Figure 3 The connecting seat 8 comprises a bottom plate and a vertical plate, the vertical plate is in L-shaped structure, one end of the vertical plate is connected to the bottom plate, and the other end of the vertical plate exceeds the side surface of the first moving beam 1. By setting the other end of the vertical plate to exceed the side surface of the first moving beam 1, when the connecting rod 2 is disconnected from the first telescopic rod of the support to be removed 4, the connecting rod 2 can be retracted, and the connecting rod 2 is parallel to the side surface of the coal wall, thereby providing a removal channel for the support to be removed 4.

[0042] In some embodiments, when the first moving beam 1 and the second moving beam 5 are assembled, the opening of the first moving beam 1 can be directed towards the bottom surface of the coal wall, so that the first moving beam 1 can reduce the probability of deformation when subjected to lateral external force. The opening of the second moving beam 5 can be directed towards the side surface, thereby providing support for the first telescopic rod of the shield support 7 in the height direction, at this time, the second moving beam 5 is equivalent to the connecting seat 8, so that the first telescopic rod of the shield support 7 and the first telescopic rod of the support to be removed 4 can be on the same installation surface.

[0043] The end of the vertical plate away from the bottom plate is provided with a pin shaft 9, and the connecting rod 2 is hinged to the connecting seat 8 through the pin shaft 9. See Figure 4 The pin shaft 9 comprises a baffle, a shaft body 91 and a limiting block 92, the shaft body 91 is arranged on the side surface of the baffle, the end of the shaft body 91 away from the baffle is provided with a groove, and the limiting block 92 is arranged in the groove and hinged to the shaft body 91. By setting the limiting block 92, when the limiting block 92 is parallel to the axial direction of the shaft body 91, the pin shaft 9 is inserted through the vertical plate of the connecting seat 8 and one end of the connecting rod 2, and then the limiting block 92 is naturally rotated to be perpendicular to the ground under the action of gravity, thereby fixing the connecting seat 8 and the connecting rod 2, and the connecting seat 8 and the connecting rod 2 can be conveniently fixed.

[0044] The top surface of the first moving beam 1 is provided with a connecting hole, the connecting seat 8 is detachably connected to the first moving beam 1 through the connecting hole, and the connecting hole is a long slot. By setting the connecting hole as a long slot, the installation position of the connecting seat 8 can be conveniently adjusted, so that the connecting seat 8 is aligned with the first telescopic rod of the support to be removed 4.

[0045] According to the technical scheme, the coal seam shield support pushing device comprises a first pulling beam 1, a connecting rod 2, a pulling chain 3, at least three support frames 4 to be removed, a second pulling beam 5, at least two shield supports 7 and a controller. One end of the first pulling beam 1 is connected to one end of the second pulling beam 5. The support frames 4 to be removed and the shield supports 7 are provided with first telescopic assemblies and second telescopic assemblies. The first telescopic assemblies comprise first telescopic rods, and the second telescopic assemblies comprise second telescopic rods. The first telescopic rods of the support frames 4 to be removed close to the shield supports 7 are connected to the first pulling beam 1 through the pulling chain 3, and the first telescopic rods of the other two support frames 4 to be removed are connected to the first pulling beam 1 through the connecting rod 2. The shield supports 7 are connected to the second pulling beam 5 through the first telescopic rods. Distance sensors are arranged on the support frames 4 to be removed, and a pressure sensor is arranged on the top surface of the shield supports 7. The first telescopic assemblies, the second telescopic assemblies, the distance sensors and the pressure sensor are in communication connection with the controller. The controller can control the first telescopic rods of the support frames 4 to be removed and the shield supports 7 to be withdrawn. The device fixes the first pulling beam 1 through two support frames 4 to be removed, and then pulls the other support frame 4 to be removed by means of the first pulling beam 1. The support frames 4 to be removed in the roadway are ingeniously used to pull the support frames 4 to be removed adjacent to them, so that the support frames in the roadway can be conveniently removed, and the problem of difficulty in removing the shield supports in the coal mine roadway is solved. At the same time, the shield supports 7 are arranged, so that effective support can be provided for the coal wall top surface during the removal process, and the coal wall top surface does not need to be supported by the top plate of the support frames 4 to be removed, which not only facilitates the removal of the support frames 4 to be removed, but also improves the safety during the operation.

[0046] The specific embodiments provided above are only a few examples of the general concept of the present application, and do not limit the protection scope of the present application. Any other embodiments extended according to the present application scheme without creative labor are within the protection scope of the present application.

Claims

1. A coal seam support shield pushing device, characterized in that, The utility model relates to a kind of coal face support removal device, including: First pull beam (1), connecting rod (2), pull chain (3), at least three to be removed support (4), second pull beam (5), at least two shield support (7) and controller; One end of the first pull beam (1) is detachably connected to one end of the second pull beam (5), and the first pull beam (1) is cross-connected with the second pull beam (5);The first pull beam (1) is perpendicular to the support (4) to be removed, and the second pull beam (5) is perpendicular to the shield support (7); The support (4) to be removed and the shield support (7) are provided with first telescopic assembly and second telescopic assembly, the first telescopic assembly includes first telescopic rod, and the second telescopic assembly includes second telescopic rod; The first telescopic rod of the support (4) to be removed close to the shield support (7) is connected with the first pull beam (1) through the pull chain (3), and the first telescopic rod of the other two support (4) to be removed is connected with the first pull beam (1) through the connecting rod (2);The shield support (7) is connected with the second pull beam (5) through the first telescopic rod; Distance sensor is provided on the support (4) to be removed, and the top surface of the shield support (7) is provided with pressure sensor;The first telescopic assembly, the second telescopic assembly, the distance sensor, the pressure sensor are respectively connected with the controller in communication.

2. The coal seam support roof support advancing device of claim 1, wherein, The support (4) to be removed is perpendicular to the side surface of coal wall, and the shield support (7) is parallel to the side surface of coal wall.

3. The coal seam support roof support advancing device of claim 1, wherein, It further includes push-pull rod (6), one end of the push-pull rod (6) is hinged with the first telescopic rod of the shield support (7), and the other end of the push-pull rod (6) is detachably connected with the top surface of the second pull beam (5);The controller is further configured to: obtain the pressure value of the shield support (7) and the top surface of coal wall, when the pressure value is less than pressure threshold value, send recovery signal to the push-pull rod (6), to control the pull rod of the push-pull rod (6) to be withdrawn.

4. The coal seam support roof support advancing device of claim 1, wherein, The length of the first pull beam (1) is greater than three times the width of the support (4) to be removed;The length of the second pull beam (5) is greater than three times the width of the shield support (7).

5. The coal seam support canopy pusher apparatus of claim 1, wherein, It further includes connecting seat (8), the connecting seat (8) is detachably connected to the top surface of the first pull beam (1);The first telescopic rod of the support (4) to be removed close to the shield support (7) is connected with one of the connecting seat (8) through the pull chain (3), and the first telescopic rod of the other two support (4) to be removed is connected with the other two connecting seat (8) through the connecting rod (2).

6. The coal seam support canopy advancing device according to claim 5, wherein, The connecting seat (8) includes bottom plate and stand, the stand is L-shaped structure, one end of the stand is connected with the bottom plate, and the other end of the stand exceeds the side surface of the first pull beam (1).

7. The coal seam support canopy advancing device of claim 5, wherein, The top surface of the first pull beam (1) is provided with connecting hole, the connecting seat (8) is detachably connected with the first pull beam (1) through the connecting hole, and the connecting hole is long strip hole.

8. The coal seam support canopy advancing device of claim 6, wherein, The pin shaft (9) is provided with a baffle, a shaft body (91) and a limiting block (92), the shaft body (91) is arranged on the side of the baffle, one end of the shaft body (91) away from the baffle is provided with a groove, the limiting block (92) is arranged in the groove, and the limiting block (92) is hinged with the shaft body (91).

9. The coal seam support canopy pusher apparatus of claim 8, wherein, The pin shaft (9) is provided with a baffle, a shaft body (91) and a limiting block (92), the shaft body (91) is arranged on the side of the baffle, one end of the shaft body (91) away from the baffle is provided with a groove, the limiting block (92) is arranged in the groove, and the limiting block (92) is hinged with the shaft body (91).

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