Coal seam shield support pushing device and method

Abstract

The invention provides a coal seam shield support pushing device and method. 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 The first pulling beam is connected with the second pulling beam, and the support to be withdrawn and the shield support are each provided with a first telescopic assembly and a second telescopic assembly. The first telescopic rod of the to-be-withdrawn support close to the shield support is connected with the first pulling beam through a pulling chain, and the first telescopic rods of the other two to-be-withdrawn supports are connected with the first pulling beam through connecting rods; the shield support is connected with the second pulling beam. A distance sensor is arranged on the support to be withdrawn, and a pressure sensor is arranged on the top face of the shield support.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 The controller can control the first telescopic rods of the to-be-withdrawn support and the shield support to be withdrawn, and then the to-be-withdrawn support and the shield support can be pulled and moved so that the support in the roadway can be conveniently withdrawn.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 tunnel auxiliary devices, and in particular to a coal seam shield support pushing device and method. Background Art

[0002] After the coal mining face is shut down, the face support and other equipment need to be removed, especially the removal of the hydraulic shield support of the coal seam fully mechanized mining face, which is an important part of the overall equipment removal. At present, the removal of shield supports mostly adopts the method of using shield supports to replace the lifting support to maintain the roof of the space to be removed. After each hydraulic support is removed, the shield support is pulled forward. This method has a high degree of safety and reliability in maintaining the roof, so it is widely used.

[0003] However, when this method is used to remove the hydraulic support, the support to be removed and the shield support to be moved forward are both pulled and moved by winch plus guide pulley. Since the support is heavy, the roof pressure and floor resistance are large, and the winch load is too high, when the tunnel environment is complex, the winch wire rope will inevitably break, which is a high risk factor; and the personnel who drag the winch wire rope and hang the guide pulley consume a lot of physical energy, which is time-consuming and labor-intensive, making it difficult to remove the shield support in the coal mine tunnel. Summary of the invention

[0004] The present application provides a coal seam shield support pushing device and method to solve the problem of difficulty in removing the shield support in a coal mine tunnel.

[0005] The first aspect of the present application provides a coal seam shield support pushing device, comprising: 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 to one end of the second pulling beam, and the first pulling beam is cross-connected to the second pulling beam; the first pulling beam is perpendicular to the support to be removed, and the second pulling beam is perpendicular to the shielding support;

[0007] The stand to be withdrawn and the shielding stand are both provided with a first telescopic assembly and a second telescopic assembly, wherein the first telescopic assembly includes a first telescopic rod, and the second telescopic assembly includes a second telescopic rod;

[0008] The first telescopic rod of the bracket to be removed close to the shielding bracket is connected to the first pulling beam through the pulling chain, and the first telescopic rods of the other two brackets to be removed are connected to the first pulling beam through the connecting rod; the shielding bracket is connected to the second pulling beam through the first telescopic rod;

[0009] The support to be withdrawn is provided with a distance sensor, 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 respectively connected to the controller for communication;

[0010] The controller is configured to:

[0011] Sending a retraction signal to the first telescopic assembly of the support to be withdrawn close to the shielding support to control the retraction of the first telescopic rod of the same support to be withdrawn;

[0012] Obtaining the distance value between the same support to be removed and the side of the coal wall;

[0013] When the distance value is less than a distance threshold, sending a recovery signal to the second telescopic assembly of the same support to be withdrawn, so as to control the retraction of the second telescopic rod;

[0014] Acquire a local area network signal of the support to be withdrawn, and when the local area network signal is not in the working area, send a recovery signal to the first telescopic component of the shielding support to control the first telescopic rod of the shielding support to be retracted;

[0015] The pressure value between the shielding support and the top surface of the coal wall is obtained, and when the pressure value is less than a pressure threshold, a start signal is sent to the first telescopic component of the next support to be removed after a preset time.

[0016] Optionally, the support to be removed is perpendicular to the side surface of the coal wall, and the shielding support is parallel to the side surface of the coal wall.

[0017] Optionally, it further includes a push-pull rod, one end of which is hinged to the first telescopic rod of the shielding bracket, and the other end of which is detachably connected to the top surface of the second pulling beam; the controller is further configured as follows:

[0018] The pressure value between the shield support and the top surface of the coal wall is obtained, and when the pressure value is less than a pressure threshold, a recovery signal is sent to the push-pull rod to control the pull rod of the push-pull rod to be retracted.

[0019] Optionally, the length of the first pulling beam is greater than three times the width of the support to be removed; the length of the second pulling beam is greater than three times the width of the shielding support.

[0020] Optionally, it also includes a connecting seat, which is detachably connected to the top surface of the first pulling beam; the first telescopic rod of the bracket to be removed close to the shielding bracket is connected to one of the connecting seats through the pulling chain, and the first telescopic rods of the other two brackets to be removed are connected to the other two connecting seats through the connecting rod.

[0021] Optionally, the connecting seat includes a bottom plate and a vertical plate, the vertical plate is an L-shaped structure, one end of the vertical plate is connected to the bottom plate, and the other end of the vertical plate extends beyond the side of the first tension beam.

[0022] Optionally, a connection hole is provided on the top surface of the first pulling beam, the connection seat is detachably connected to the first pulling beam via the connection hole, and the connection hole is an elongated hole.

[0023] Optionally, a pin is provided at one end of the vertical plate away from the bottom plate, and the connecting rod is hinged to the connecting seat via the pin.

[0024] Optionally, the pin shaft includes a baffle, an axle body and a limit block, the axle body is arranged on the side of the baffle, a groove is arranged at one end of the axle body away from the baffle, the limit block is arranged in the groove, and the limit block is hinged to the axle body.

[0025] The second aspect of the present application provides a method for moving a coal seam shield support, which is applied to the coal seam shield support moving device provided in the first aspect, wherein the 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 method comprises:

[0026] Sending a retraction signal to the first telescopic assembly of the support to be withdrawn close to the shielding support to control the retraction of the first telescopic rod of the same support to be withdrawn;

[0027] Obtaining the distance value between the same support to be removed and the side of the coal wall;

[0028] When the distance value is less than a distance threshold, sending a recovery signal to the second telescopic assembly of the same support to be withdrawn, so as to control the retraction of the second telescopic rod;

[0029] Acquire a local area network signal of the support to be withdrawn, and when the local area network signal is not in the working area, send a recovery signal to the first telescopic component of the shielding support to control the first telescopic rod of the shielding support to be retracted;

[0030] The pressure value between the shielding support and the top surface of the coal wall is obtained, and when the pressure value is less than a pressure threshold, a recovery signal is sent to the first telescopic component of the next support to be removed after a preset time.

[0031] The present application provides a coal seam shield support pushing device and method, the device includes: 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. One end of the first pulling beam is connected to one end of the second pulling beam, and the support to be removed and the shield support 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 rod of the support to be removed close to the shield support is connected to the first pulling beam through a pulling chain, and the first telescopic rods of the other two supports to be removed are connected to the first pulling beam through a connecting rod; the shield support is connected to the second pulling beam through the first telescopic rod. A distance sensor is provided on the support to be removed, and a pressure sensor is provided 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 connected to the controller for communication. The controller can control the first telescopic rod of the support to be removed and the shielding support to be retracted. The device fixes the first pulling beam through two of the supports to be removed, and then uses the first pulling beam to pull the other support to be removed. The support to be removed in the tunnel is cleverly used to pull the adjacent support to be removed, which can facilitate the removal of the support in the tunnel and solve the problem of difficult removal of the shielding support in the coal mine tunnel. At the same time, by setting the shielding support, effective support can be provided for the top surface of the coal wall during the removal process, without the need to support the top surface of the coal wall through the top plate of the support to be removed, which not only facilitates the removal of the support to be removed, but also improves the safety during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 A schematic diagram of the top view of the structure of the coal seam shield support pushing device is provided for the embodiment of the present application;

[0034] Figure 2 A schematic diagram of a connection structure between a first pulling beam and a second pulling beam is provided for an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the connection socket structure provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of the pin structure provided in an embodiment of the present application.

[0037] Illustration Description:

[0038] Among them, 1-the first pulling and shifting beam; 2-connecting rod; 3-pulling chain; 4-bracket to be removed; 5-the second pulling and shifting beam; 6-push-pull rod; 7-shielding bracket; 8-connecting seat; 9-pin shaft; 91-axis body; 92-limiting block; 11#, 12#, 13#-bracket to be removed; 21#, 22#, 23#-shielding bracket. DETAILED DESCRIPTION

[0039] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0040] When removing the hydraulic shield support of the fully mechanized coal mining face, the support to be removed and the shield support are moved forward by winch plus guide pulley. Because the support is heavy, the roof pressure and floor resistance are large, the winch load is too high, and when the tunnel environment is complex, the winch wire rope is inevitably broken, which is a high risk factor; and the personnel who drag the winch wire rope and hang the guide pulley consume a lot of physical energy, which is time-consuming and labor-intensive, making it difficult to remove the shield support in the coal mine tunnel.

[0041] In order to solve the problem of difficulty in removing the shield support in the coal mine tunnel, some embodiments of the present application first provide a coal seam shield support pushing device, see Figure 1 The device includes: a first pulling beam 1, a connecting rod 2, a pulling chain 3, at least three to-be-removed brackets 4, a second pulling beam 5, at least two shielding brackets 7 and a controller. Since the controller can be installed at other positions except the first pulling beam 1 and the second pulling beam 5, the controller is not shown. Figure 1 The serial numbers 11#, 12#, and 13# in the figure are the supports 4 to be removed, and the serial numbers 21#, 22#, and 23# are the shielding supports 7. The supports 4 to be removed and the shielding supports 7 need to be explained separately here. When the hydraulic supports are removed, in order to maintain the top surface of the coal wall and prevent the coal seam on the top surface from falling off and causing danger, the top surface of the coal wall needs to be supported. In the embodiment of the present application, before the hydraulic supports are removed, the supports 4 to be removed are first turned by steel wire ropes so that the supports 4 to be removed are parallel to the length direction of the tunnel, so as to support the top surface of the coal wall at the innermost side of the tunnel. At this time, the turned supports 4 to be removed are shielding supports 7.

[0042] See also Figure 2In some embodiments, the first pulling beam 1 and the second pulling beam 5 can be modified from standard channel steel, and one end of the first pulling beam 1 and one end of the second pulling beam 5 can be detachably connected, for example, by bolts. The first pulling beam 1 and the second pulling beam 5 are cross-connected. In some embodiments, in order to facilitate assembly, the first pulling beam 1 and the second pulling beam 5 can be vertically arranged, so that the first pulling beam 1 is perpendicular to the support 4 to be removed, and the second pulling beam 5 is perpendicular to the shielding support 7, that is, the first pulling beam 1 is arranged along the length direction of the roadway, parallel to the side of the coal wall, and the second pulling beam 5 is arranged along the width direction of the roadway, perpendicular to the side of the coal wall.

[0043] The support to be removed 4 and the shielding support 7 are both provided with a first telescopic assembly and a second telescopic assembly, wherein 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 top plate in the horizontal direction, i.e., to change the length of the top plate, and the second telescopic assembly is used to lift and lower the top plate in the height direction, i.e., to change the height of the top plate. The support to be removed 4, the shielding support 7, the first telescopic assembly and the second telescopic assembly can all be obtained through the prior art, and are not described in detail in this application.

[0044] The first telescopic rod of the support 4 to be removed near the shielding support 7 is connected to the first pulling beam 1 through the pulling chain 3, and the first telescopic rods of the other two supports 4 to be removed are connected to the first pulling beam 1 through the connecting rod 2. Figure 1 For example, the device includes at least three brackets to be removed, namely, bracket 11# to be removed, bracket 12# to be removed and bracket 13# to be removed, wherein bracket 11# to be removed is connected to the first pulling beam 1 through a pulling chain 3, and brackets 12# to be removed and brackets 13# to be removed are connected to the first pulling beam 1 through two connecting rods 2 respectively.

[0045] When the first telescopic rod of the first telescopic assembly is extended, the first pulling beam 1 is fixed by the 12# bracket to be removed and the 13# bracket to be removed through the connecting rod 2 and the first telescopic rod. At this time, the first telescopic rod of the 11# bracket to be removed is controlled to be retracted, so that the 11# bracket to be removed can be pulled toward the first pulling beam 1, so that the bracket to be removed 4 is withdrawn from the original position, and then the 11# bracket to be removed is turned by the wire rope, and the connection between the pulling chain 3 and the 11# bracket to be removed is removed, and the connection between the connecting rod 2 and the 12# bracket to be removed and the 13# bracket to be removed is removed, so that the 11# bracket to be removed can be removed. It can be understood that since the first pulling beam 1 is fixed by only one bracket to be removed 4, the bracket to be removed 4 connected to the pulling chain 3 may not be effectively pulled, so there are at least three brackets to be removed 4 connected to the first pulling beam 1.

[0046] It should also be noted that due to the different widths of the lanes, the lengths of the connecting rods 2 are also different. When the length of the connecting rods 2 is long, the 11# bracket to be removed may not be fully pulled to a steerable position by pulling it once. By setting the pulling chain 3, after the first pulling is completed, the length of the pulling chain 3 is adjusted, and the 11# bracket to be removed can be pulled again. And the use of a soft connection method can adapt to complex lane environments and uneven floor conditions. During the pulling process, even if the lane is partially deformed or the floor is undulating, the pulling chain 3 can still maintain a stable connection to avoid bracket damage or pulling failure caused by a hard connection.

[0047] The shielding bracket 7 is connected to the second pulling beam 5 through the first telescopic rod. The number of shielding brackets 7 is at least two. In some embodiments, the number of shielding brackets 7 can be three to better support the top surface of the coal wall. Figure 1 For example, when removing the shielding support 7, since the second pulling beam 5 has been fixed by the first pulling beam 1, the first telescopic rod of the shielding support 7 is controlled to be retracted, and the shielding support 21#, the shielding support 22# and the shielding support 23# can be pulled outward. In some embodiments, the shielding support 21# can be pulled outward first, and then the shielding support 22# and the shielding support 23# can be pulled outward.

[0048] The support 4 to be withdrawn is provided with a distance sensor, the top surface of the shielding support 7 is provided with a pressure sensor, and the first telescopic component, the second telescopic component, the distance sensor, and the pressure sensor are respectively connected to the controller for communication. The controller is configured as follows:

[0049] A recovery signal is sent to the first telescopic component of the support to be removed 4 close to the shielding support 7 to control the retraction of the first telescopic rod of the support to be removed 4; the distance value between the same support to be removed 4 and the side of the coal wall is obtained; when the distance value is less than the distance threshold, a recovery signal is sent to the second telescopic component of the same support to be removed 4 to control the retraction of the second telescopic rod; the local area network signal of the support to be removed 4 is obtained, and when the local area network signal is not in the working area, a recovery signal is sent to the first telescopic component of the shielding support 7 to control the retraction of the first telescopic rod of the shielding support 7; the pressure value between the shielding support 7 and the top surface of the coal wall is obtained, and when the pressure value is less than the pressure threshold, a recovery signal is sent to the first telescopic component of the next support to be removed 4 after a preset time.

[0050] During operation, the initial state of the first telescopic rod of the first telescopic assembly of the support 4 to be removed in the coal mine tunnel is the extended state. Therefore, the controller sends a recovery signal to the first telescopic assembly of the support 4 to be removed near the shielding support 7. After the first telescopic rod is recovered, the support 4 to be removed is pulled toward the side of the coal wall. If the distance between the support 4 to be removed and the side of the coal wall is less than the distance threshold, the support 4 to be removed can be turned by a wire rope and withdrawn from the tunnel. At this time, since the shielding support 7 is provided in the tunnel, the second telescopic rod of the support 4 to be removed can be retracted, and the top plate of the support 4 to be removed is separated from the top surface of the coal wall, so that the support 4 to be removed can be removed conveniently. When the local area network signal of the removed support 4 to be removed is not in the working area, it means that the support 4 to be removed has been completely removed, and the shielding support 7 can be pulled. After the shielding support 7 is pulled, in order to prevent the environment of the top surface of the coal wall from changing, it is necessary to detect the pressure value between the shielding support 7 and the top surface of the coal wall. When the pressure value is less than the pressure threshold, it means that there is no collapse on the top surface of the coal wall or the coal seam has fallen off, and the next support 4 to be removed can be removed at this time. Before removing the next bracket 4 to be removed, it is necessary to connect the pull chain 3 with the next bracket 4 to be removed, and connect the connecting rod 2 with the other two brackets 4 to be removed. Therefore, the controller sends a recovery signal to the first telescopic component of the next bracket 4 to be removed after a preset time.

[0051] The pulling and moving device provided in the embodiment of the present application uses two of the brackets 4 to be removed to fix the first pulling and moving beam 1, and then uses the first pulling and moving beam 1 to pull the other bracket 4 to be removed. The brackets 4 to be removed in the tunnel can be cleverly used to remove the brackets 4 adjacent to it, which can facilitate the removal of the brackets in the tunnel and solve the problem of difficult removal of the protective brackets in the coal mine tunnel. At the same time, by setting the protective bracket 7, effective support can be provided for the top surface of the coal wall during the removal process, without the need to support the top surface of the coal wall through the top plate of the bracket 4 to be removed, which not only facilitates the removal of the bracket 4 to be removed, but also improves the safety during the operation.

[0052] See again Figure 1 In some embodiments, the device further includes a push-pull rod 6, which may be an electric push-pull rod, one end of which is hinged to the first telescopic rod of the shielding support 7, and the other end of which is detachably connected to the top surface of the second pulling beam 5. By setting the push-pull rod 6, the pulling distance of the shielding support 7 can be increased. The controller is further configured to: obtain the pressure value between the shielding support 7 and the top surface of the coal wall, and when the pressure value is less than the pressure threshold, send a recovery signal to the push-pull rod 6 to control the pull rod of the push-pull rod 6 to be retracted.

[0053] In order to provide installation space, the length of the first pulling beam 1 is greater than three times the width of the support 4 to be removed; the length of the second pulling beam 5 is greater than three times the width of the shielding support 7.

[0054] In some embodiments, the device further comprises a connecting seat 8, which is detachably connected to the top surface of the first pulling beam 1, wherein the first telescopic rod of one of the brackets 4 to be removed is connected to one of the connecting seats 8 via the pulling chain 3, and the first telescopic rod of another bracket 4 to be removed is connected to another connecting seat 8 via the connecting rod 2. Figure 3 The connecting seat 8 includes a bottom plate and a vertical plate, the vertical plate is an 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 of the first pulling beam 1. By setting the other end of the vertical plate to exceed the side of the first pulling beam 1, when the connection between the connecting rod 2 and the first telescopic rod of the support 4 to be removed is removed, the connecting rod 2 can be retracted so that the connecting rod 2 is parallel to the side of the coal wall, providing a removal channel for the support 4 to be removed.

[0055] In some embodiments, when assembling the first pulling beam 1 and the second pulling beam 5, the opening of the first pulling beam 1 can be directed toward the bottom surface of the coal wall, so that the probability of deformation of the first pulling beam 1 can be reduced when the first pulling beam 1 is subjected to lateral external force. The opening of the second pulling beam 5 can be directed toward the side to provide height support for the first telescopic rod of the shielding bracket 7. At this time, the second pulling beam 5 is equivalent to the connecting seat 8, so that the first telescopic rod of the shielding bracket 7 and the first telescopic rod of the bracket to be removed 4 can be on the same installation surface.

[0056] A pin shaft 9 is provided at one end of the vertical plate away from the bottom plate, and the connecting rod 2 is hingedly connected to the connecting seat 8 via the pin shaft 9. Figure 4 The pin shaft 9 includes a baffle, a shaft body 91 and a stopper 92. The shaft body 91 is arranged on the side of the baffle. A groove is arranged at one end of the shaft body 91 away from the baffle. The stopper 92 is arranged in the groove. The stopper 92 is hinged to the shaft body 91. By setting the stopper 92, when the stopper 92 is parallel to the axis direction of the shaft body 91, the pin shaft 9 is passed through the vertical plate of the connecting seat 8 and one end of the connecting rod 2. Then, the stopper 92 is naturally rotated to be perpendicular to the ground under the action of gravity, so that the connecting seat 8 and the connecting rod 2 can be fixed, and the connecting seat 8 and the connecting rod 2 can be fixed conveniently.

[0057] A connecting hole is provided on the top surface of the first pulling beam 1, and the connecting seat 8 is detachably connected to the first pulling beam 1 through the connecting hole, and the connecting hole is a long hole. By setting the connecting hole as a long hole, 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 bracket 4 to be removed.

[0058] Based on the above-mentioned coal seam shield support pushing device, some embodiments of the present application also provide a coal seam shield support pushing method, which is applied to the coal seam shield support pushing device provided in some embodiments above, and the device includes a first pulling beam 1, a connecting rod 2, a pulling chain 3, at least three supports to be removed 4, a second pulling beam 5, at least two shield supports 7 and a controller. The method includes:

[0059] S1: Sending a retraction signal to the first telescopic assembly of the support 4 to be removed that is close to the shielding support 7, so as to control the retraction of the first telescopic rod of the same support 4 to be removed.

[0060] S2: Obtain the distance value between the same support 4 to be removed and the side surface of the coal wall.

[0061] S3: When the distance value is less than the distance threshold, a recovery signal is sent to the second telescopic assembly of the same support 4 to be withdrawn, so as to control the retraction of the second telescopic rod.

[0062] S4: Acquire the local area network signal of the support 4 to be withdrawn, and when the local area network signal is not in the working area, send a recovery signal to the first telescopic component of the shielding support 7 to control the first telescopic rod of the shielding support 7 to be retracted.

[0063] S5: Obtain the pressure value between the shielding support 7 and the top surface of the coal wall. When the pressure value is less than the pressure threshold, send a recovery signal to the first telescopic component of the next support 4 to be removed after a preset time.

[0064] It can be seen from the above technical scheme that the embodiment of the present application provides a coal seam shield support pushing device and method, the device includes: a first pulling beam 1, a connecting rod 2, a pulling chain 3, at least three supports to be removed 4, 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, and the support to be removed 4 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 rod of the support to be removed 4 close to the shield support 7 is connected to the first pulling beam 1 through the pulling chain 3, and the first telescopic rods of the other two supports to be removed 4 are connected to the first pulling beam 1 through the connecting rod 2; the shield support 7 is connected to the second pulling beam 5 through the first telescopic rod. A distance sensor is provided on the support to be removed 4, and a pressure sensor is provided on the top surface of the shield support 7; the first telescopic assembly, the second telescopic assembly, the distance sensor, and the pressure sensor are respectively connected to the controller for communication. The controller can control the first telescopic rods of the support 4 to be removed and the shielding support 7 to be retracted. The device fixes the first pulling beam 1 through two of the support 4 to be removed, and then uses the first pulling beam 1 to pull the other support 4 to be removed. The support 4 to be removed in the tunnel is cleverly used to pull the adjacent support 4 to be removed, which can facilitate the removal of the support in the tunnel and solve the problem of difficult removal of the shielding support in the coal mine tunnel. At the same time, by setting the shielding support 7, effective support can be provided for the top surface of the coal wall during the removal process, without the need to support the top surface of the coal wall through the top plate of the support 4 to be removed, which not only facilitates the removal of the support 4 to be removed, but also improves the safety during the operation.

[0065] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A coal seam protection support pushing device, characterized in that: include: A first pulling beam (1), a connecting rod (2), a pulling chain (3), at least three supports to be removed (4), a second pulling beam (5), at least two shielding supports (7) and a controller; One end of the first pulling beam (1) is detachably connected to one end of the second pulling beam (5), and the first pulling beam (1) and the second pulling beam (5) are cross-connected; the first pulling beam (1) is perpendicular to the support to be removed (4), and the second pulling beam (5) is perpendicular to the shielding support (7); The stand to be withdrawn (4) and the shielding stand (7) are both provided with a first telescopic assembly and a second telescopic assembly, wherein 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 bracket to be removed (4) close to the shielding bracket (7) is connected to the first pulling beam (1) via the pulling chain (3), and the first telescopic rods of the other two brackets to be removed (4) are connected to the first pulling beam (1) via the connecting rod (2); the shielding bracket (7) is connected to the second pulling beam (5) via the first telescopic rod; The stand to be withdrawn (4) is provided with a distance sensor, and the top surface of the shielding stand (7) is provided with a pressure sensor; the first telescopic assembly, the second telescopic assembly, the distance sensor, and the pressure sensor are respectively connected to the controller for communication; The controller is configured to: Sending a retraction signal to the first telescopic assembly of the support (4) to be withdrawn close to the shielding support (7) to control the retraction of the first telescopic rod of the same support (4) to be withdrawn; Obtaining the distance value between the same support (4) to be removed and the side surface of the coal wall; When the distance value is less than a distance threshold, a recovery signal is sent to the second telescopic assembly of the same support (4) to be withdrawn, so as to control the retraction of the second telescopic rod; Acquiring a local area network signal of the support (4) to be withdrawn, and when the local area network signal is not within the working area, sending a recovery signal to the first telescopic component of the shielding support (7) to control the retraction of the first telescopic rod of the shielding support (7); The pressure value between the shielding support (7) and the top surface of the coal wall is obtained, and when the pressure value is less than a pressure threshold, a recovery signal is sent to the first telescopic component of the next support (4) to be removed after a preset time.

2. The coal seam protection support pushing device according to claim 1 is characterized in that: The support to be removed (4) is perpendicular to the side surface of the coal wall, and the shielding support (7) is parallel to the side surface of the coal wall.

3. The coal seam protection support pushing device according to claim 1 is characterized in that: It also includes a push-pull rod (6), one end of which is hinged to the first telescopic rod of the shielding bracket (7), and the other end of which is detachably connected to the top surface of the second pulling beam (5); the controller is also configured as follows: The pressure value between the shield support (7) and the top surface of the coal wall is obtained, and when the pressure value is less than a pressure threshold, a recovery signal is sent to the push-pull rod (6) to control the pull rod of the push-pull rod (6) to be retracted.

4. The coal seam protection support pushing device according to claim 1 is characterized in that: The length of the first pulling beam (1) is greater than three times the width of the support (4) to be removed; and the length of the second pulling beam (5) is greater than three times the width of the shielding support (7).

5. The coal seam protection support pushing device according to claim 1 is characterized in that: It also comprises a connecting seat (8), wherein the connecting seat (8) is detachably connected to the top surface of the first pulling beam (1); the first telescopic rod of the bracket to be removed (4) close to the shielding bracket (7) is connected to one of the connecting seats (8) through the pulling chain (3), and the first telescopic rods of the other two brackets to be removed (4) are connected to the other two connecting seats (8) through the connecting rod (2).

6. The coal seam protection support pushing device according to claim 5 is characterized in that: The connecting seat (8) comprises a bottom plate and a vertical plate, the vertical plate is an L-shaped structure, one end of the vertical plate is connected to the bottom plate, and the other end of the vertical plate extends beyond the side surface of the first pulling beam (1).

7. The coal seam protection support pushing device according to claim 5 is characterized in that: A connection hole is provided on the top surface of the first pulling beam (1), and the connection seat (8) is detachably connected to the first pulling beam (1) via the connection hole, and the connection hole is an elongated hole.

8. The coal seam protection support pushing device according to claim 6 is characterized in that: A pin shaft (9) is provided at one end of the vertical plate away from the bottom plate, and the connecting rod (2) is hingedly connected to the connecting seat (8) via the pin shaft (9).

9. The coal seam protection support pushing device according to claim 8, characterized in that: The pin shaft (9) comprises a baffle, an axle body (91) and a limit block (92); the axle body (91) is arranged on the side of the baffle; one end of the axle body (91) away from the baffle is provided with a groove; the limit block (92) is arranged in the groove; and the limit block (92) is hinged to the axle body (91).

10. A method for moving a coal seam protection support, characterized in that: The coal seam shield support pushing device applied to any one of claims 1 to 9 comprises a first pulling beam (1), a connecting rod (2), a pulling chain (3), at least three supports to be removed (4), a second pulling beam (5), at least two shield supports (7) and a controller; the method comprises: Sending a retraction signal to the first telescopic assembly of the support (4) to be withdrawn close to the shielding support (7) to control the retraction of the first telescopic rod of the same support (4) to be withdrawn; Obtaining the distance value between the same support (4) to be removed and the side surface of the coal wall; When the distance value is less than a distance threshold, a recovery signal is sent to the second telescopic assembly of the same support (4) to be withdrawn, so as to control the retraction of the second telescopic rod; Acquiring a local area network signal of the support (4) to be withdrawn, and when the local area network signal is not within the working area, sending a recovery signal to the first telescopic component of the shielding support (7) to control the retraction of the first telescopic rod of the shielding support (7); The pressure value between the shielding support (7) and the top surface of the coal wall is obtained, and when the pressure value is less than a pressure threshold, a recovery signal is sent to the first telescopic component of the next support (4) to be removed after a preset time.

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