A self-moving tunnel advance support bracket device and its migration method

Abstract

The present invention relates to the technical field of tunnel advance support, specifically a self-moving tunnel advance support support device and its migration method, including two advance support units, the advance support unit including a base, a column, a top beam, a hydraulic control system and a bottom lifting mechanism, the advance support unit is provided with an anti-fall mechanism, the anti-fall mechanism includes an anti-fall seat hinged to the base and an anti-fall jack hinged to the anti-fall seat and the advance support unit; the moving frame mechanism includes an upper moving frame assembly and a lower moving frame assembly located in the upper and lower middle parts of the advance support unit; when the bottom lifting mechanism or the moving frame mechanism of one advance support unit is working, the anti-fall mechanism of the other advance support unit is stretched out and supported on the ground outside the base. The present application greatly reduces the possibility of tilting through the joint support function of the anti-fall mechanism and the moving frame mechanism, effectively ensures the smooth and safe movement of the support device during migration and the support effect of the fixed advance support unit on the tunnel roof, and has high safety.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel advance support, in particular to a self-moving tunnel advance support bracket device and a migration method thereof. Background Art

[0002] Hydraulic supports are key equipment in comprehensive mechanized coal mining. They have a long history of development in my country and have been widely adopted in many large and medium-sized coal mines, achieving significant technical, economic, and social benefits. With the advancement of coal mining technology, the use of advanced hydraulic supports in mine roadways, replacing single hydraulic props and other devices for roadway support, has begun to be applied in my country and has achieved certain results. However, due to the long length of the advanced supports along the roadway and the continuous extension and change of the coal mining face, the advanced supports must be relocated and repeatedly supported, which is not conducive to maintaining the roadway roof. Furthermore, their use is difficult in coal seam geological conditions with poor geological conditions.

[0003] Conventional tunnel advance support brackets are mainly composed of a top beam, a base, columns, and a hydraulic control system. During operation, the hydraulic control system controls the column to rise so that the top beam of the bracket contacts the tunnel roof for support. When adjusting the position and moving the layout, the hydraulic control system is used to lower the column so that the top beam of the bracket is separated from the tunnel roof. Then, a hand hoist, monorail crane and other lifting devices, as well as single pillars and winch auxiliary traction devices are used to move the bracket body to a new support position and then re-support it. When the geological conditions of the tunnel coal seam deteriorate, the following problems will occur, resulting in the inability to relocate and use the bracket normally:

[0004] 1. The tunnel floor, roof and tunnel wall are severely deformed due to the influence of mine pressure. The height and width of the tunnel working space are severely squeezed and reduced. Auxiliary lifting and traction devices are difficult to be installed and used normally. It is difficult to exert force during the transportation and removal of the support, resulting in extremely low work efficiency.

[0005] 2. When the coal seam on the tunnel floor is relatively soft, the support body will "sink" into the tunnel floor to varying degrees during the support operation because the downward pressure exceeds the bearing capacity of the tunnel floor. Before it can be moved again, a large amount of manpower must be invested to carry out a more thorough undercover cleaning operation and try to make the bottom surface of the support higher than the movable support ground before it can continue to be transported and moved, which seriously affects the succession of coal mining operations.

[0006] In order to solve the above technical problems, the Chinese invention patent application with publication number CN113339026A discloses a method for advanced support of special-shaped tunnels and an advanced hydraulic support, which controls the frame moving jack and the bottom lifting jack to repeatedly support and move the two front and rear advanced hydraulic supports in the tunnel, so as to realize the self-movement of the supports, and then realize the layout, installation and adjustment of the advanced supports in the mine tunnel site. However, during the movement of the advanced hydraulic supports in the above scheme, one of the supports is fixed in the tunnel to support the tunnel roof, and the other support is moved by lifting the bottom lifting jack and pushing and pulling the frame moving jack. Since the support pushes and pulls the support it relies on when it moves, it is easy to cause the support fixed in the tunnel to tilt, resulting in poor stability during movement; there is even a situation where the support function fails, which poses a great safety hazard. Summary of the Invention

[0007] The technical problem to be solved by the present invention is how to provide a self-moving tunnel advance support bracket device and its migration method, so that the bracket device can move smoothly and safely during repeated support and movement in the tunnel, while ensuring the supporting effect of the fixed advance bracket unit on the tunnel roof, thereby improving the safety of the layout, installation and adjustment of the advance support bracket at the mine and tunnel site.

[0008] The present invention solves the above technical problems through the following technical means:

[0009] A self-moving tunnel advance support support device includes two advance support units connected by a frame moving mechanism, the advance support units including a base, a column, a top beam, a hydraulic control system and a bottom lifting mechanism, the column is fixedly mounted on the base, the top beam is lifted and lowered at the top of the column, and both advance support units are further provided with an anti-fall mechanism, the anti-fall mechanism including an anti-fall seat and an anti-fall jack, the anti-fall seat is hinged to the base, one end of the anti-fall jack is hinged to the anti-fall seat, and the other end is hinged to the advance support unit;

[0010] The frame moving mechanism includes an upper frame moving assembly located in the upper middle part of the advance bracket unit and a lower frame moving assembly located in the lower middle part of the advance bracket unit; when the bottom lifting mechanism or frame moving mechanism of one advance bracket unit is working, the anti-falling mechanism of the other advance bracket unit is opened and supported on the ground outside the base.

[0011] Beneficial effect: when in use, the two advance support units are fixed in the tunnel, the top beam supports the tunnel roof, and the anti-fall jack supports the anti-fall seat on the ground, that is, the anti-fall mechanism is in the expanded state, thereby forming a stable support for the advance support unit; when the support device needs to be moved, the anti-fall mechanism of one of the advance support units is first retracted to make the anti-fall seat leave the ground, and then the hydraulic control system is used to control the column of the advance support unit to descend, so that its top beam is separated from the tunnel roof; then the bottom lifting mechanism of the advance support unit is operated to lift one side of it, and after padding the suspended part under the base, the upper moving frame assembly is started to push the advance support unit back to the center, and after continuing to pad the suspended part under the base, the upper moving frame assembly and the lower moving frame assembly are started at the same time. The advance bracket unit can be pushed to move horizontally. At this time, the other advance bracket unit is stably fixed in the tunnel by the support of its anti-fall mechanism, and forms a stable support for the tunnel roof. In addition, since the upper moving frame assembly and the lower moving frame assembly are respectively located in the upper and lower middle parts of the advance bracket unit, when one of the advance bracket units is lifted and returned to the center, the bottom, middle and top of the other advance bracket unit are all under stress, which greatly reduces the possibility of tilting. It can be seen that the present application effectively ensures the smooth and safe movement of the bracket device during the migration process and the supporting effect of the advance bracket unit fixed in the tunnel on the tunnel roof through the joint support effect of the anti-fall mechanism and the moving frame mechanism, and has high safety.

[0012] Preferably, the base includes a bottom plate, side plates, a cover plate and an arc-shaped edging, and the bottom plate, side plates and cover plate are fixedly connected in sequence to form a box-type structure, and the arc-shaped edging is fixedly covered on the outer side of the side plates.

[0013] Beneficial effects: The base is a box-type structure, and its periphery adopts a double-layer structure formed by side panels and arc-shaped edging. On the one hand, the structural strength of the base is effectively improved; on the other hand, the arc-shaped edging not only eliminates the sharp corners of the grounding part of the base, avoiding the base from cutting into and scraping the ground during the initial installation and lifting and transportation, reducing the difficulty of on-site handling, but also when the advance bracket unit is lifted, the base rotates stably along the arc-shaped edging, which has the dual effects of improving stability during lifting and saving effort.

[0014] Preferably, a bottom bracket is fixedly placed in the box-shaped structure of the base, a recess is provided on the top surface of the bottom bracket that cooperates with the bottom of the column, and the column is fixedly connected to the bottom bracket; the base includes a support member that is also fixedly installed in the box-shaped structure and extends above the cover plate, and the column is fixedly connected to the support member.

[0015] Beneficial effects: The bottom of the column is fixedly installed in the box structure of the base through the bottom bracket. The recessed restriction prevents the column from moving in the box structure. The upper part of the column is fixedly connected to the support member, which improves the firmness of the connection between the column and the base and reduces the possibility of the column tilting, thereby further enhancing the overall stability of the bracket device.

[0016] Preferably, the outer upper side of the arc-shaped edging is fixedly connected to a hinged ear seat, and the anti-fall seat is hinged to the hinged ear seat through a pin hole and a pin shaft; the upper part of the base is fixedly connected to an anti-fall ear seat, and the anti-fall ear seat is located directly above the cover plate, and the end of the anti-fall jack away from the anti-fall seat is hinged to the anti-fall ear seat.

[0017] Beneficial effects: the anti-backward seat is hinged to the base through the hinged ear seat, and the anti-backward jack is hinged to the base through the anti-backward ear seat. When the anti-backward jack is extended, it supports the anti-backward seat on the ground, and the anti-backward mechanism is in the expanded state. Similarly, when the anti-backward jack is retracted, the anti-backward mechanism is in the retracted state. Since the hinged ear seat is fixedly connected to the outer upper side of the arc-shaped edging, the integrity of the high-strength box-type structure at the lower part of the base is maintained as much as possible, and the anti-backward seat is hinged to the hinged ear seat through the pin hole and the pin shaft, which has the advantages of convenient and quick assembly and disassembly. In addition, the anti-backward ear seat is located directly above the cover plate. When the anti-backward mechanism is retracted, the anti-backward seat and the anti-backward jack can be as close to the bracket body as possible, thereby reducing the external dimensions of the advance bracket unit and facilitating the overall movement, transportation, and placement of the bracket.

[0018] Preferably, a longitudinal guide strip is fixedly connected to the bottom surface of the base, and both ends of the guide strip are chamfered or have arc transitions; a longitudinal anti-slip strip is fixedly connected to the bottom surface of the anti-fall seat.

[0019] Beneficial effects: The guide strips set up can naturally cut into the bottom surface of the tunnel, thereby reducing the lateral displacement and deviation of the bracket during movement; the chamfers or arc transitions at both ends of the guide strips solve the problem of the bracket rotation being affected by the setting of the guide strips; the anti-slip strips set on the bottom surface of the anti-back seat enhance the grip of the bottom of the anti-back seat, making the support of the anti-back mechanism more stable and reliable, and further improving the smoothness and safety of the movement during the migration process.

[0020] Preferably, the upper moving frame assembly includes an upper moving frame jack installed between two advance bracket units, and the columns of the two advance bracket units are provided with inner clamps and outer clamps hinged to each other, the inner clamp is fixed to the base, and the outer clamp and the inner clamp are engaged with each other on the column and fixed by bolts; the outer clamp is fixedly connected to the upper ear seat, and the upper moving frame jack is hinged to the upper ear seats of the two advance bracket units.

[0021] Beneficial effects: Since the inner clamp is fixed to the base, the upper frame jack is hinged to the outer clamp through the upper ear seat. When the inner clamp and the outer clamp are fixed to the column, on the one hand, they have the effect of clamping and fixing the column, so that the column and the base are firmly connected; on the other hand, the upper frame jack and the two advance bracket units are hinged. When the upper frame jack is working, the column and the base can jointly share the push and pull loads borne by the bracket, thereby improving the stability of the overall structure of the bracket device, and also has the advantages of simple structure and easy installation.

[0022] Preferably, the lower moving frame assembly includes a lower moving frame jack installed between two advance bracket units, and the bases of the two advance bracket units are fixed with moving frame ear seats, and the moving frame ear seats extend upward from the base, and the lower moving frame jack is hinged at the top ends of the two advance bracket unit moving frame ear seats.

[0023] Beneficial effect: The lower moving frame jack is hinged to the two advance bracket units through the moving frame ear seat. Since the bracket is prone to sinking in the tunnel with a soft bottom plate, this application sets the lower moving frame jack at the top of the moving frame ear seat. This heightened design raises the position of the lower moving frame jack, thereby increasing the safety distance to avoid being buried, and thus improving the overall applicability of the bracket device.

[0024] Preferably, the bottom lifting mechanism includes a bottom lifting fixed cylinder, a bottom lifting jack and a support seat. The bottom lifting fixed cylinder is fixedly connected to the base, the top end of the bottom lifting jack is fixedly installed in the bottom lifting fixed cylinder, and the bottom end extends out of the bottom lifting fixed cylinder and is fixedly connected to the support seat.

[0025] Beneficial effect: Since the bottom lifting fixing cylinder is fixedly connected to the base, the bottom lifting jack is fixedly installed in the bottom lifting fixing cylinder. When the bottom lifting mechanism is working, the bottom lifting jack extends and pushes the support seat downward to support it on the ground, so that one side of the advance bracket unit can be lifted. Similarly, when the suspended part under the base is padded, the bottom lifting jack can be operated to retract it, which is convenient for the subsequent correction of the bracket.

[0026] The present invention also provides a migration method for a self-moving tunnel advance support bracket device, wherein the advance bracket unit includes a head bracket located in front of a frame moving mechanism and a tail bracket located behind the frame moving mechanism, and the bottom lifting mechanisms of the head bracket and the tail bracket are both located in the front of the advance bracket unit;

[0027] The method for migrating the self-moving tunnel advance support bracket device in a soft tunnel floor working condition comprises the following steps:

[0028] S1, push head frame

[0029] 1.1 Lowering the headframe columns and extending and lifting the bottom: Keep the tailframe top beam supporting the tunnel roof, and the anti-fall mechanism supporting the tailframe, and operate the headframe columns to descend through the hydraulic control system, so that the headframe top beam leaves the tunnel roof, and the anti-fall mechanism of the headframe is retracted; then operate the bottom-lifting mechanism of the headframe to lift the front of the headframe so that the headframe as a whole tilts backward, and then backfill the suspended part under the headframe base with pads and compact it, so that the headframe as a whole lands firmly on the ground;

[0030] 1.2 Straighten the head frame: Operate the hydraulic control system to extend the upper frame assembly, thereby pushing the head frame to rotate and straighten it; similarly, fill the exposed suspended part below the head frame base with pads and compact it, so that the head frame as a whole lands firmly on the ground (the ground support is firmly implemented), and then retract the bottom lifting mechanism;

[0031] 1.3 Push the head frame: Extend the upper frame assembly and the lower frame assembly at the same time, and push the head frame as a whole to slide along the ground to the set position;

[0032] 1.4 Restore the head frame support: Use the hydraulic control system to extend the head frame column, thereby lifting the head frame top beam to contact and solidify with the tunnel roof.

[0033] S2, tail rack

[0034] 2.1 Lowering the tailstock column and extending and lifting the bottom: Keep the headstock supporting the tunnel roof and the anti-fall mechanism supporting the headstock, and operate the hydraulic control system to lower the tailstock column so that the tailstock top beam leaves the tunnel roof and retract the anti-fall mechanism of the tailstock; then operate the tailstock bottom lifting mechanism to lift the front part of the tailstock so that the tailstock as a whole tilts backward, and then backfill the suspended part under the tailstock base with pads and compact it so that the headstock as a whole lands firmly on the ground;

[0035] 2.2 Righting the tailstock: Operate the hydraulic control system to retract the upper frame assembly, thereby pulling the tailstock to rotate and righting it; similarly, fill the exposed overhanging part below the tailstock base with pads and compact it, so that the tailstock as a whole lands firmly on the ground, and then retract the bottom lifting mechanism;

[0036] 2.3 Pull the tailstock: retract the upper and lower frame assemblies at the same time, and pull the tailstock as a whole to slide along the ground to the set position;

[0037] 2.4 Restore tailstock support: Use the hydraulic control system to extend the tailstock column, thereby lifting the tailstock top beam to contact and solidify with the roadway roof;

[0038] S3. Repeat the above operations to enable the bracket to continuously move by itself.

[0039] Beneficial effects: The self-moving advance support bracket device designed and developed in the present application tilts the frame backward through the lifting action of the bottom lifting mechanism, and after the suspended part is backfilled and padded, the frame is straightened by pushing the head frame or pulling the tail frame through the upper frame assembly to achieve posture adjustment operation; the head frame is pushed or the tail frame is pulled by pushing and pulling the upper frame assembly and the lower frame assembly together, so that the head frame and the tail frame are repeatedly tilted backward, straightened, pushed and pulled to achieve self-movement of the bracket; in this process, the coordinated cooperation of the bottom lifting mechanism, the upper frame assembly, the lower frame assembly and the anti-fall mechanism ensures the smooth and safe movement of the bracket during movement, and is well adapted to the repeated support, movement and layout conditions of the advance support bracket in narrow and long tunnels, which greatly facilitates the layout, installation and adjustment of the advance support bracket on site in the mine and tunnel, has practical significance for better maintenance of the tunnel roof, and enriches the structural form of the tunnel advance support bracket products.

[0040] Preferably, the overall backward tilt angle of the head frame in step S1-1.1 and the overall backward tilt angle of the tail frame in step S2-2.1 are set according to the total height of the bracket. When the total height of the bracket is ≤4 meters, the backward tilt angle is ≤10°; when the total height of the bracket is ≤2.6 meters, the backward tilt angle is ≤15°; when the total height of the bracket is ≤2 meters, the backward tilt angle is ≤20°.

[0041] Beneficial effects: If the height of the single advance bracket is high and the backward angle is large, the center of gravity may become unstable and tip over; if the height of the single advance bracket is low and the backward angle is small, there is a problem of too short a single movement distance, which reduces the migration efficiency; when the total height of the bracket used in this application is ≤4 meters, the backward angle is ≤10°; when the total height of the bracket is ≤2.6 meters, the backward angle is ≤15°; when the total height of the bracket is ≤2 meters, the backward angle is ≤20°, which ensures the stability of the movement and the migration efficiency.

[0042] Preferably, the backfill pads in steps S1 and S2 are made of coal slag, gangue and sleeper blocks, which can be obtained locally and are simple and convenient.

[0043] Preferably, in the process of straightening the head frame in steps S1-1.2 and straightening the tail frame in steps S2-2.2, the weight of the entire frame is completely supported by the bottom support seat. If the support seat is unstable and has an obvious tendency to slide back and forth, the extension speed of the upper frame assembly should be slowed down, and the lower frame assembly should be slightly extended and retracted to make the bracket posture stable.

[0044] A migration method of a self-moving tunnel advance support bracket device, characterized in that: the advance bracket unit includes a head bracket located in front of a bracket moving mechanism and a tail bracket located in the rear of the bracket moving mechanism;

[0045] The method for migrating the self-moving tunnel advance support bracket device under hard tunnel floor working conditions comprises the following steps:

[0046] S1, push head frame

[0047] 1-1. Headframe lowering column: Maintain the support of the tailframe top beam on the roadway roof, and the support of the anti-fall mechanism on the tailframe. Use the hydraulic control system to control the headframe column to descend, so that the headframe top beam leaves the roadway roof, and retract the headframe anti-fall mechanism.

[0048] 1-2 Push the head frame: Extend the upper frame assembly and the lower frame assembly at the same time, and push the head frame as a whole to slide along the ground to the set position;

[0049] 1-3 Restore the head frame support: Use the hydraulic control system to extend the head frame columns, thereby lifting the head frame top beam to contact and solidify with the roadway roof;

[0050] S2, tail rack

[0051] 2-1 Tailstock lowering column: Maintain the support of the headstock on the tunnel roof and the support of the anti-fall mechanism on the headstock, operate the tailstock column to descend through the hydraulic control system, make the tailstock top beam leave the tunnel roof, and retract the tailstock anti-fall mechanism;

[0052] 2-2 Pull the tailstock: retract the upper and lower frame assemblies at the same time, and pull the tailstock as a whole to slide along the ground to the set position;

[0053] 2-3 Restore tailstock support: Use the hydraulic control system to extend the tailstock column, thereby lifting the tailstock top beam to contact and solidify with the roadway roof;

[0054] S3. Repeat the above operations to enable the bracket to continuously move by itself.

[0055] The advantages of the present invention are:

[0056] 1. When the bottom lifting mechanism or the frame moving mechanism of an advance support unit of the present invention is working, the other advance support unit is stably fixed in the tunnel by the support action of its anti-fall mechanism, and forms a stable support for the tunnel roof; at the same time, the bottom, middle and upper parts of the advance support unit are respectively restricted by the anti-fall mechanism, the frame moving mechanism and the tunnel roof, so that the bottom, middle and top parts of the advance support unit are all under stress, which greatly reduces the possibility of tilting; it can be seen that the present application effectively ensures the smooth and safe movement of the support device during the migration process and the supporting effect of the advance support unit fixed in the tunnel on the tunnel roof through the joint support action of the anti-fall mechanism and the frame moving mechanism, thereby improving the safety of the layout, installation and adjustment of the advance support bracket at the mine and tunnel site.

[0057] 2. The base of the present invention is a box-type structure, and its periphery adopts a double-layer structure formed by side panels and arc-shaped edging. On the one hand, the structural strength of the base is effectively improved; on the other hand, the arc-shaped edging not only eliminates the sharp edges and corners of the grounding part of the base, avoiding the base from cutting into and scraping the ground during the initial installation and lifting and transportation, thereby reducing the difficulty of on-site handling, but also when the advance bracket unit is lifted, the base rotates stably along the arc-shaped edging, which has the dual effects of improving stability during lifting and saving effort.

[0058] 3. The self-moving advance support bracket device designed and developed by the present invention tilts the frame backward through the lifting action of the bottom lifting mechanism, and after the suspended part is backfilled and padded, the frame is straightened by pushing the head frame or pulling the tail frame through the upper frame assembly to achieve posture adjustment operation; the head frame is pushed or the tail frame is pulled by the joint pushing and pulling of the upper frame assembly and the lower frame assembly, so that the head frame and the tail frame are repeatedly tilted backward, straightened, pushed and pulled to achieve self-movement of the bracket; in this process, the coordinated cooperation of the bottom lifting mechanism, the upper frame assembly, the lower frame assembly and the anti-fall mechanism ensures the smooth and safe movement of the bracket during movement, and is well adapted to the repeated support, movement and layout conditions of the advance support bracket in narrow and long tunnels, which greatly facilitates the layout, installation and adjustment of the advance support bracket on site in the mine and tunnel, has practical significance for better maintenance of the tunnel roof, and enriches the structural form of the tunnel advance support bracket products. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0060] Figure 2 for Figure 1 A-direction view;

[0061] Figure 3 This is a structural diagram of the base in an embodiment of the present application;

[0062] Figure 4 for Figure 3 B-direction view;

[0063] Figure 5 This is a schematic structural diagram of the anti-fall mechanism in an embodiment of the present application;

[0064] Figure 6 This is a structural diagram of the bottom lifting mechanism in an embodiment of the present application;

[0065] Figure 7 This is a schematic structural diagram of the outer clamp and the inner clamp in the embodiment of the present application;

[0066] Figure 8 This is a structural diagram of the outer clamp and the inner clamp in the embodiment of the present application when they are engaged on the column;

[0067] Figure 9This is a structural diagram of the upper moving frame assembly in an embodiment of the present application;

[0068] Figure 10 This is a schematic diagram of the overall structure of the hidden frame moving mechanism according to an embodiment of the present application;

[0069] Figure 11 This is a structural diagram of the lower frame assembly in an embodiment of the present application.

[0070] Description of reference numerals: 1, base; 11, bottom plate; 111, bottom support; 112, guide bar; 113, chamfer transition; 12. Side panels; 13. Cover plates; 14. Arc-shaped edging; 15. Support members; 2. Upright columns; 3. Top beams; 4. Hydraulic control system; 5. Anti-fall mechanism; 51. Anti-fall seat; 511. Anti-slip strips; 52. Articulated ear seats; 53. Anti-fall jacks; 54. Anti-fall ear seats; 6. Bottom lifting mechanism; 61. Bottom lifting fixing tube; 62. Bottom lifting jacks; 63. Support seats; 7. Frame moving mechanism; 71. Upper frame assembly; 711. Upper frame jack; 712. Outer clamp; 713. Inner clamp; 714. Upper ear seats; 72. Lower frame assembly; 721. Lower frame jack; 722. Frame moving ear seats; 723. Heightening pin holes; 81. Head frame; 82. Tail frame. DETAILED DESCRIPTION

[0071] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0072] Example 1

[0073] The embodiment of the present application discloses a self-moving tunnel advance support bracket device. Figure 1 、 Figure 2 The self-moving tunnel advance support bracket device includes two advance bracket units, and the advance bracket units include a base 1, a column 2, a top beam 3, a hydraulic control system 4, a bottom lifting mechanism 6 and an anti-fall mechanism 5.

[0074] Reference Figure 1 、 Figure 3The base 1 comprises a bottom plate 11, side plates 12, a cover plate 13, an arcuate edging 14, and support members 15. The bottom plate 11, side plates 12, and cover plate 13 are fixedly connected in sequence to form a box-shaped structure. The arcuate edging 14 is a semi-circular tube, fixedly wrapped around the outside of the side plates 12, forming a double-layer structure around the perimeter of the box-shaped structure. This not only effectively improves the structural strength of the base 1, but also eliminates sharp edges and corners at the ground contact area of the base 1, preventing them from cutting into or scraping the ground during installation and transportation. It also facilitates the stable rotation of the base 1 along the arcuate edging 14.

[0075] Reference Figure 1 、 Figure 4 The front of the support member 15 is convex-shaped, and its bottom is fixedly installed in the box-type structure and extends above the cover plate 13. A bottom bracket 111 is fixedly placed on the inner bottom surface of the box-type structure, and a recess is provided on the top surface of the bottom bracket 111 to match the bottom of the column 2. There are two columns 2, and the two columns 2 are respectively located on both sides of the support member 15. The bottom ends of the two columns 2 are fixedly placed in the recess of the bottom bracket 111, and the upper and middle parts are fixedly connected to the upper part of the support member 15. The restriction of the recess prevents the column 2 from moving in the box-type structure. The supporting effect of the support member 15 reduces the possibility of the column 2 tilting and improves the stable connection between the column 2 and the base 1.

[0076] Reference Figure 1 The column 2 uses a column 2 jack, and the top beam 3 is fixedly installed on the top of the column 2. The hydraulic control system 4 is electrically connected to the column 2. By operating the hydraulic control system 4 to extend or retract the column 2, the top beam 3 can be raised and lowered. When the top beam 3 supports the roadway roof, it can provide support for the roadway and prevent it from being severely deformed by the mine pressure.

[0077] Reference Figure 4 、 Figure 5 The anti-fall mechanism 5 includes an anti-fall seat 51, an articulated ear seat 52, an anti-fall jack 53, and an anti-fall ear seat 54. The articulated ear seat 52 is fixedly connected to the outer upper side of the arc-shaped edging 14, and a pin hole is provided on the articulated ear seat 52. The anti-fall seat 51 is hinged to the articulated ear seat 52 through a pin shaft and a pin hole, thereby realizing an articulation with the base 1. The anti-fall ear seat 54 is fixedly connected to the upper part of the support member 15, and the anti-fall ear seat 54 is located directly above the cover plate 13. A pin hole is provided on the anti-fall ear seat 54, and the upper end of the anti-fall jack 53 is hinged to the support member 15 through a pin shaft and a pin hole, thereby realizing an articulation with the base 1; the lower end of the anti-fall jack 53 is hinged to the end of the anti-fall seat 51 away from the articulated ear seat 52.

[0078] Reference Figure 2 、 Figure 5, two anti-fall mechanisms 5 are provided on each advance bracket unit, and the two anti-fall mechanisms 5 are located on both sides of the base 1. The anti-fall jack 53 is electrically connected to the hydraulic control system 4. By operating the hydraulic control system 4 to extend the anti-fall jack 53, the anti-fall jack 53 will support the anti-fall seat 51 on the ground outside the base 1, thus forming a stable support for the advance bracket unit, effectively improving the stability of the advance bracket unit, and because the hinged ear seat 52 is fixedly connected to the outer upper side of the arc-shaped edging 14, the integrity of the high-strength box-type structure at the bottom of the base 1 is maintained as much as possible during support. When the hydraulic control system 4 is operated to retract the anti-fall jack 53, the anti-fall jack 53 pulls the base 1 to rotate upward until it is close to the bracket body, thereby reducing the external dimensions of the advance bracket unit and facilitating the movement, transportation, and placement of the entire bracket.

[0079] Reference Figure 6 The bottom lifting mechanism 6 includes a bottom lifting fixed cylinder 61, a bottom lifting jack 62 and a support seat 63. The opening of the bottom lifting fixed cylinder 61 is downward and fixedly connected to the bottom of the base 1. The top end of the bottom lifting jack 62 is fixedly installed in the bottom lifting fixed cylinder 61. After the bottom end extends out of the bottom lifting fixed cylinder 61, it is fixedly connected to the support seat 63 through a pin shaft. The bottom lifting jack 62 is electrically connected to the hydraulic control system 4. The hydraulic control system 4 is operated to extend the bottom lifting jack 62. The bottom lifting jack 62 pushes the support seat 63 downward to support it on the ground, thereby lifting one side of the advance support unit; similarly, when the bottom lifting jack 62 is retracted, the advance support unit can be restored to a horizontal state.

[0080] Reference Figure 1 A moving frame mechanism 7 is provided between the two leading support monomers. The moving frame mechanism 7 includes an upper moving frame assembly 71 and a lower moving frame assembly 72. The upper moving frame assembly 71 is located in the middle and upper part of the leading support monomer, and the lower moving frame assembly 72 is located in the middle and lower part of the leading support monomer. Figure 7 、 Figure 8 As shown, the upper frame assembly 71 includes an upper frame jack 711, an outer clamp 712, and an inner clamp 713. The outer clamp 712 and the inner clamp 713 are hinged to each other through a pin, and the inner clamp 713 is welded and fixed to the upper part of the support 15. The outer clamp 712 and the inner clamp 713 are engaged with the column 2 and fixed by bolts. Two sets of outer clamps 712 and inner clamps 713 are provided on a single advance bracket to achieve a fixed connection between the column 2 and the support 15. Figure 9As shown, the upper frame jack 711 is located between the two lead support units, and upper ear seats 714 are fixedly connected to the outer clamps 712 on the inner sides of the two lead support units. The upper frame jack 711 is hingedly connected to the upper ear seats 714, thereby achieving an articulated connection between the upper frame jack 711 and the lead support units. When the upper frame jack 711 is in operation, one lead support unit pushes and pulls the other lead support unit through the upper frame jack 711. At this time, the column 2 and the base 1 can share the push and pull load, improving the stability of the overall structure of the support device.

[0081] Reference Figure 10 、 Figure 11 The lower frame assembly 72 includes a lower frame jack 721 and a frame lug 722. The frame lug 722 is fixedly connected to the bottom of the base 1 and extends above the cover plate 13. The lower frame jack 721 is located between the two advanced support units. The top of the frame lug 722 is provided with a heightened pin hole 723. The center axis height of the heightened pin hole 723 is not less than 400 mm. The lower frame jack 721 is hinged to the frame lug 722 through the heightened pin hole 723 and the pin shaft. The heightened pin hole design on the frame lug 722 improves the position of the lower frame jack 721, preventing it from sinking and being buried in the lane of the soft bottom plate 11, thereby improving the overall applicability of the support device.

[0082] The upper frame jack 711 and the lower frame jack 721 are both electrically connected to the hydraulic control system 4. By operating the hydraulic control system 4 to extend and retract the upper frame jack 711 and / or the lower frame jack 721, one of the advance support units can push or pull the other advance support unit. When in use, the two advance support monomers are fixed in the tunnel, the top beams 3 support the tunnel roof, and the anti-fall jacks 53 support the anti-fall seat 51 on the ground; when the support device needs to be moved, the anti-fall mechanism 5 of one of the advance support monomers is folded up, and then the column 2 of the advance support monomer is controlled to descend through the hydraulic control system 4, so that the top beam 3 is separated from the tunnel roof; then the bottom lifting jack 62 of the advance support monomer is operated to lift one side of it. At this time, the base 1 below the advance support monomer is suspended, and coal slag, gangue and sleeper blocks are backfilled for padding; then the upper moving frame jack 711 is operated to push the advance support monomer back to the center, and after continuing to pad the suspended part below the base 1, the upper moving frame jack 711 and the lower moving frame jack 721 are operated at the same time, and the two work together to push the advance support monomer to move horizontally; when the advance support monomer moves to the set position, the other advance support monomer is pushed and pulled in the same way to move, and the self-moving walking of the bracket is achieved by repeatedly supporting and moving.

[0083] When one of the advance support units in the present application is being lifted or straightened, the other advance support unit is stably fixed in the tunnel by the support of its anti-fall mechanism 5, and forms a stable support for the tunnel roof; and since the upper moving frame assembly 71 and the lower moving frame assembly 72 are respectively located in the upper and lower middle parts of the advance support unit, the bottom, middle and top of the other advance support unit are all in a stressed state at this time, which greatly reduces the possibility of tilting; it can be seen that the joint support effect of the anti-fall mechanism 5 and the moving frame mechanism 7 effectively ensures the smooth and safe movement of the support device during the migration process and the supporting effect of the advance support unit fixed in the tunnel on the tunnel roof, and has high safety.

[0084] Reference Figure 2 , a guide bar 112 is fixedly connected to the bottom surface of the base 1, and multiple guide bars 112 are arranged longitudinally. In this embodiment, three are taken, which naturally cut into the bottom plate 11 of the tunnel to reduce the lateral displacement and deviation of the bracket during movement. Both ends of the guide bar 112 are chamfered or arc-shaped to prevent the guide bar 112 from affecting the rotation of the bracket, thereby ensuring the movement effect of the bracket. An anti-slip bar 511 is fixedly connected to the bottom surface of the anti-fall seat 51, and multiple anti-slip bars 511 are arranged longitudinally. In this embodiment, two are taken. The anti-slip bar 511 enhances the grip of the bottom of the anti-fall seat 51, making the support of the anti-fall mechanism 5 more stable and reliable, and further improving the smoothness and safety of the movement of the bracket device during migration.

[0085] Example 2

[0086] The present embodiment discloses a method for relocating a self-moving tunnel advance support support device, specifically a method for relocating a self-moving tunnel advance support support device in a soft tunnel floor 11. This method utilizes the advance support unit described in Example 1, wherein the two advance support units are a head frame 81 and a tail frame 82, respectively. The head frame 81 is located in front of the frame moving mechanism 7, and the tail frame 82 is located in the rear of the frame moving mechanism 7. The bottom lifting mechanisms 6 of the head frame 81 and the tail frame 82 are both located in front of the advance support units.

[0087] The migration method of the self-moving tunnel advance support bracket device includes the following steps:

[0088] S1, push head frame 81

[0089] 1.1 Lower the column 2 of the head frame 81 and extend and lift the bottom: maintain the support of the tail frame 82 top beam 3 on the tunnel roof, and the support of the anti-fall mechanism 5 on the tail frame 82, control the column 2 of the head frame 81 to be lowered through the hydraulic control system 4, so that the head frame 81 top beam 3 leaves the tunnel roof, and retract the anti-fall mechanism 5 of the head frame 81.

[0090] Then operate the bottom lifting mechanism 6 of the head frame 81 to extend the bottom lifting jack 62. At this time, the support seat 63 is supported on the ground to lift the front part of the head frame 81, so that the head frame 81 as a whole leans back. It should be noted that the leaning angle is controlled: when the total height of the bracket is ≤4 meters, the leaning angle is ≤10°; when the total height of the bracket is ≤2.6 meters, the leaning angle is ≤15°; when the total height of the bracket is ≤2 meters, the leaning angle is ≤20° to prevent the center of gravity from becoming unstable and tipping over.

[0091] Then, the suspended portion below the base 1 of the head frame 81 is backfilled with coal slag, gangue, sleeper blocks, and other padding and compacted. The padding can be compacted by trial lowering the bottom lifting jack 62 until the head frame 81 is firmly supported on the ground. Among them, coal slag, gangue, and sleeper blocks are used as the backfill padding, which can be obtained locally and is simple and convenient.

[0092] 1.2 Straighten the head frame 81: operate the hydraulic control system 4 to extend the upper frame jack 711, thereby pushing the head frame 81 to rotate and straighten it; note that when straightening, the leading bracket unit is completely supported by the support seat 63 to support the weight of the entire frame. If the support seat 63 is unstable and has an obvious tendency to slide back and forth, the extension speed of the upper frame jack 711 should be slowed down, and the lower frame jack 721 should be slightly extended and retracted to make the bracket posture stable.

[0093] Similarly, the exposed suspended portion below the base 1 of the head frame 81 is backfilled with coal slag, gangue, sleeper blocks, etc. and compacted, so that the head frame 81 is firmly placed on the ground as a whole, and then the bottom lifting jack 62 and the support seat 63 are retracted.

[0094] 1.3 Pushing the head frame 81: Extend the upper frame jack 711 and the lower frame jack 721 at the same time, and the two together push the head frame 81 so that the whole head frame slides along the ground until it moves to the set position.

[0095] 1.4 Restore the support of the head frame 81: Use the hydraulic control system 4 to control the extension of the head frame 81 column 2, thereby lifting the head frame 81 top beam 3 to contact and solidify with the tunnel roof.

[0096] S2, tailstock 82

[0097] 2.1 Lowering the tail frame 82 column 2 and extending and lifting the bottom: Keep the head frame 81 supporting the tunnel roof and the anti-fall mechanism 5 supporting the head frame 81, control the tail frame 82 column 2 to descend through the hydraulic control system 4, so that the tail frame 82 top beam 3 leaves the tunnel roof, and retract the anti-fall mechanism 5 of the tail frame 82.

[0098] Then operate the bottom lifting mechanism 6 of the tail frame 82 to extend the bottom lifting jack 62. At this time, the support seat 63 is supported on the ground to lift the front part of the tail frame 82, so that the tail frame 82 can be tilted back as a whole. It should also be noted that the tilting angle is controlled: when the total height of the bracket is ≤4 meters, the tilting angle is ≤10°; when the total height of the bracket is ≤2.6 meters, the tilting angle is ≤15°; when the total height of the bracket is ≤2 meters, the tilting angle is ≤20° to prevent the center of gravity from losing stability and tipping over.

[0099] Then, the suspended portion below the base 1 of the tail frame 82 is backfilled with coal slag, gangue, sleeper blocks and other pads and compacted. The pads can be compacted by trial lowering the bottom lifting jack 62 until the tail frame 82 is firmly supported on the ground.

[0100] 2.2 Straighten the tail frame 82: operate the hydraulic control system 4 to retract the upper frame jack 711, thereby pulling the tail frame 82 to rotate and straighten it; note that when straightening, the leading bracket unit is completely supported by the support seat 63 to bear the weight of the entire frame. If the support seat 63 is unstable and has an obvious tendency to slide back and forth, the speed of retracting the upper frame jack 711 should be slowed down, and the lower frame jack 721 should be slightly extended and retracted to make the bracket posture stable.

[0101] Similarly, the exposed suspended portion below the base 1 of the tail frame 82 is backfilled with coal slag, gangue, sleeper blocks, etc. and compacted, so that the tail frame 82 is firmly placed on the ground as a whole, and then the bottom lifting jack 62 and the support seat 63 are retracted.

[0102] 2.3 Pulling and moving the tail frame 82: Retract the upper frame jack 711 and the lower frame jack 721 at the same time, and the two together pull the tail frame 82 so that the entire tail frame slides along the ground until it moves to the set position.

[0103] 2.4 Restore the support of the tailstock 82: The hydraulic control system 4 is used to control the extension of the tailstock 82 column 2, thereby lifting the tailstock 82 top beam 3 to contact and solidify with the tunnel roof.

[0104] S3. Repeat the above operations to enable the bracket to continuously move by itself.

[0105] Example 3

[0106] The present embodiment discloses a method for relocating a self-propelled tunnel advance support support device, specifically a method for relocating the self-propelled tunnel advance support support device in a hard tunnel floor 11. This method utilizes the advance support unit described in Example 1, wherein the two advance support units are a head frame 81 and a tail frame 82, respectively. The head frame 81 is located in front of the frame moving mechanism 7, and the tail frame 82 is located in the rear of the frame moving mechanism 7.

[0107] The migration method of the self-moving tunnel advance support bracket device includes the following steps:

[0108] S1, push head frame 81

[0109] 1-1. Lower the column 2 of the head frame 81: maintain the support of the tail frame 82 top beam 3 on the tunnel roof, and the support of the anti-fall mechanism 5 on the tail frame 82, control the column 2 of the head frame 81 to be lowered through the hydraulic control system 4, so that the head frame 81 top beam 3 leaves the tunnel roof, and retract the anti-fall mechanism 5 of the head frame 81.

[0110] 1-2 Pushing the head frame 81: Extend the upper frame jack 711 and the lower frame jack 721 at the same time, and the two together push the head frame 81 so that the whole head frame slides along the ground until it moves to the set position.

[0111] 1-3 Restore the support of the head frame 81: Use the hydraulic control system 4 to control the extension of the head frame 81 column 2, thereby lifting the head frame 81 top beam 3 to contact and solidify with the tunnel roof.

[0112] S2, tailstock 82

[0113] 2-1 Lowering the tailstock 82 column 2: Maintaining the support of the headstock 81 on the tunnel roof and the anti-fall mechanism 5 on the headstock 81, the tailstock 82 column 2 is manipulated to descend through the hydraulic control system 4, so that the top beam 3 of the tailstock 82 leaves the tunnel roof, and the anti-fall mechanism 5 of the tailstock 82 is retracted.

[0114] 2-2 Pulling the tail frame 82: Retract the upper frame jack 711 and the lower frame jack 721 at the same time, and the two together pull the tail frame 82 so that the entire tail frame slides along the ground until it moves to the set position.

[0115] 2-3 Restore the support of the tailstock 82: Use the hydraulic control system 4 to control the extension of the tailstock 82 column 2, thereby lifting the tailstock 82 top beam 3 to contact and solidify with the tunnel roof.

[0116] S3. Repeat the above operations to enable the bracket to continuously move by itself.

[0117] Principle of use and advantages: The self-moving advance support bracket device designed and developed in this application tilts the frame backward through the lifting action of the bottom lifting mechanism 6, and after the suspended part is backfilled and padded, the upper moving frame assembly 71 pushes the head frame 81 or pulls the tail frame 82 to straighten the frame to achieve posture adjustment operation; through the joint pushing and pulling of the upper moving frame assembly 71 and the lower moving frame assembly 72, the head frame 81 is pushed or the tail frame 82 is pulled, so that the head frame 81 and the tail frame 82 are repeatedly tilted backward, straightened, pushed and pulled, and the bracket is self-moved; in this process, when one of the advance bracket monomers is in the process of lifting or straightening, the other advance bracket monomer is stably fixed in the tunnel by the support of its anti-fall mechanism 5, and forms a stable support for the supporting tunnel roof, and at the same time, the bottom, middle and top of the other advance bracket monomer are all under stress, which greatly reduces the possibility of tilting. It can be seen that the coordinated cooperation of the bottom lifting mechanism 6, the upper moving frame assembly 71, the lower moving frame assembly 72 and the anti-fall mechanism 5 effectively ensures the smooth and safe movement of the support device during the migration process and the supporting effect of the advance support unit fixed in the tunnel on the tunnel roof. It is well adapted to the repeated support, movement and layout conditions of the advance support support in narrow and long tunnels, greatly facilitates the layout, installation and adjustment of the advance support support at the mine and tunnel site, has practical significance for better maintenance of the tunnel roof, and enriches the structural form of the tunnel advance support support product.

[0118] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A self-moving tunnel advance support support device, comprising two advance support units connected by a frame moving mechanism (7), each of the advance support units comprising a base (1), a column (2), a top beam (3), a hydraulic control system (4) and a bottom lifting mechanism (6), wherein the column (2) is fixedly mounted on the base (1), and the top beam (3) is arranged to be lifted and lowered at the top of the column (2), characterized in that: The advanced support monomer comprises a head frame (81) located at the front side of the moving frame mechanism (7) and a tail frame (82) located at the rear side of the moving frame mechanism (7), and the bottom lifting mechanisms (6) of the head frame (81) and the tail frame (82) are both located at the front of the advanced support monomer. Each advanced support monomer is also provided with an anti-fall mechanism (5), and the anti-fall mechanism (5) comprises an anti-fall seat (51) and an anti-fall jack (53). The anti-fall seat (51) is hinged to the base (1), and one end of the anti-fall jack (53) is hinged to the anti-fall seat (51), and the other end is hinged to the advanced support monomer. The frame moving mechanism (7) includes an upper frame moving assembly (71) located in the upper middle portion of the advance support unit and a lower frame moving assembly (72) located in the lower middle portion of the advance support unit; when the bottom lifting mechanism (6) or the frame moving mechanism (7) of one advance support unit is working, the anti-falling mechanism (5) of the other advance support unit is opened and supported on the ground outside the base (1); The base (1) comprises a bottom plate (11), a side plate (12), a cover plate (13), an arc-shaped edging (14) and a support member (15). The bottom plate (11), the side plate (12) and the cover plate (13) are fixedly connected in sequence to form a box-shaped structure. The arc-shaped edging (14) is fixedly covered on the outer side of the side plate (12). The front of the support member is convex-shaped, and its bottom is fixedly installed in the box-shaped structure and extends above the cover plate. A bottom bracket is fixedly placed on the inner bottom surface of the box-shaped structure. A recess is provided on the top surface of the bottom bracket to match the bottom of the column. There are two columns, and the two columns are respectively located on both sides of the support member. The bottom ends of the two columns are fixedly placed in the recess of the bottom bracket, and the middle and upper parts are fixedly connected to the upper part of the support member. The outer upper side of the arc-shaped edging (14) is fixedly connected to a hinged ear seat (52), and the anti-fall seat (51) is hinged to the hinged ear seat (52) through a pin hole and a pin shaft; the upper part of the base (1) is fixedly connected to an anti-fall ear seat (54), the anti-fall ear seat (54) is located just above the cover plate (13), and the anti-fall jack (53) is hinged to the anti-fall ear seat (54) at one end away from the anti-fall seat (51); A longitudinally arranged guide strip (112) is fixedly connected to the bottom surface of the base (1), and both ends of the guide strip (112) are chamfered or arc-shaped; a longitudinally arranged anti-slip strip (511) is fixedly connected to the bottom surface of the anti-fall seat (51); The upper moving frame assembly (71) includes an upper moving frame jack (711) installed between two advance support monomers. The columns (2) of the two advance support monomers are both provided with an inner clamp (713) and an outer clamp (712) that are hinged to each other. The inner clamp (713) is fixed to the base (1). The outer clamp (712) and the inner clamp (713) are engaged with the column (2) and fixed by bolts. The outer clamp (712) is fixedly connected to the upper ear seat (714). The upper moving frame jack (711) and the upper ear seat (714) of the two advance support monomers are both hinged.

2. The self-moving tunnel advance support bracket device according to claim 1, characterized in that: The lower moving frame assembly (72) includes a lower moving frame jack (721) installed between two advance support monomers, a moving frame ear seat (722) is fixed to the base (1) of the two advance support monomers, and the moving frame ear seat (722) extends above the base (1), and the lower moving frame jack (721) is hinged to the top of the moving frame ear seat (722) of the two advance support monomers.

3. The self-moving tunnel advance support bracket device according to claim 1, characterized in that: The bottom lifting mechanism (6) comprises a bottom lifting fixed cylinder (61), a bottom lifting jack (62) and a support seat (63); the bottom lifting fixed cylinder (61) is fixedly connected to the base (1); the top end of the bottom lifting jack (62) is fixedly installed in the bottom lifting fixed cylinder (61), and the bottom end extends out of the bottom lifting fixed cylinder (61) and is fixedly connected to the support seat (63).

4. A method for migrating a self-moving tunnel advance support bracket device, characterized in that: A method for migrating a self-moving tunnel advance support bracket device according to any one of claims 1 to 3 in a soft tunnel floor (11) working condition comprises the following steps: S1, Push head frame (81) 1.1 Lowering the upright column (2) of the head frame (81) and extending and lifting the bottom: Maintaining the support of the top beam (3) of the tail frame (82) on the tunnel roof and the support of the anti-fall mechanism (5) on the tail frame (82), the upright column (2) of the head frame (81) is manipulated to descend through the hydraulic control system (4), so that the top beam (3) of the head frame (81) leaves the tunnel roof, and the anti-fall mechanism (5) of the head frame (81) is folded up; then the bottom lifting mechanism (6) of the head frame (81) is manipulated to lift the front part of the head frame (81) so that the head frame (81) as a whole leans back, and then the suspended part below the base (1) of the head frame (81) is backfilled with pads and compacted, so that the head frame (81) as a whole lands firmly on the ground; 1.2 Straightening the head frame (81): Operate the hydraulic control system (4) to extend the upper frame assembly (71), thereby pushing the head frame (81) to rotate and straighten the head frame (81); similarly, fill the exposed suspended portion below the base (1) of the head frame (81) with pads and compact it, so that the head frame (81) as a whole lands firmly, and then retract the bottom lifting mechanism (6); 1.3 Pushing the head frame (81): Extending the upper frame assembly (71) and the lower frame assembly (72) at the same time, pushing the head frame (81) to slide along the ground to the set position; 1.4 Restoring the support of the head frame (81): The head frame (81) upright column (2) is extended by the hydraulic control system (4), thereby lifting the head frame (81) top beam (3) to contact and solidify with the roadway roof; S2, tail rack (82) 2.1 Lowering the upright column (2) and extending and lifting the bottom of the tail frame (82): Maintaining the support of the head frame (81) on the tunnel roof and the support of the anti-fall mechanism (5) on the head frame (81), the upright column (2) of the tail frame (82) is manipulated to descend through the hydraulic control system (4), so that the top beam (3) of the tail frame (82) leaves the tunnel roof, and the anti-fall mechanism (5) of the tail frame (82) is retracted; then the bottom lifting mechanism (6) of the tail frame (82) is manipulated to lift the front part of the tail frame (82) so that the tail frame (82) as a whole tilts backward, and then the suspended part below the base (1) of the tail frame (82) is backfilled with pads and compacted, so that the head frame (81) as a whole lands firmly on the ground; 2.2 Straightening the tailstock (82): Operate the hydraulic control system (4) to retract the upper frame assembly (71), thereby pulling the tailstock (82) to rotate and straighten the tailstock (82); similarly, fill the exposed suspended portion below the base (1) of the tailstock (82) with pads and compact it, so that the tailstock (82) lands firmly on the ground as a whole, and then retract the bottom lifting mechanism (6); 2.3 Pulling and moving the tail frame (82): retracting the upper frame assembly (71) and the lower frame assembly (72) at the same time, and pulling the tail frame (82) to slide along the ground to the set position; 2.4 Restoring the tailstock (82) support: Using the hydraulic control system (4), the tailstock (82) uprights (2) are extended, thereby lifting the tailstock (82) top beam (3) to contact and solidify with the roadway roof; S3. Repeat the above operations to enable the bracket to continuously move by itself.

5. The method for migrating a self-moving tunnel advance support bracket device according to claim 4, characterized in that: The overall tilt angle of the head frame (81) in step S1-1.1 and the overall tilt angle of the tail frame (82) in step S2-2.1 are set according to the total height of the bracket. When the total height of the bracket is ≤4 meters, the tilt angle is ≤10°; when the total height of the bracket is ≤2.6 meters, the tilt angle is ≤15°; when the total height of the bracket is ≤2 meters, the tilt angle is ≤20°.

6. A method for migrating a self-moving tunnel advance support bracket device, characterized in that: The method for migrating the self-moving tunnel advance support bracket device according to any one of claims 1 to 3 under the working condition of a hard tunnel floor (11) comprises the following steps: S1, Push head frame (81) 1-1. Lowering the column (2) of the head frame (81): maintaining the support of the top beam (3) of the tail frame (82) on the roadway roof, and the support of the anti-fall mechanism (5) on the tail frame (82), manipulating the column (2) of the head frame (81) to descend through the hydraulic control system (4), so that the top beam (3) of the head frame (81) leaves the roadway roof, and retracting the anti-fall mechanism (5) of the head frame (81); 1-2 Pushing the head frame (81): Extending the upper frame assembly (71) and the lower frame assembly (72) at the same time, pushing the head frame (81) to slide along the ground to the set position; 1-3 Restoring the support of the head frame (81): The head frame (81) upright column (2) is extended by the hydraulic control system (4), thereby lifting the head frame (81) top beam (3) to contact and solidify with the roadway roof; S2, tail rack (82) 2-1 Lowering the tail frame (82) column (2): Maintaining the support of the head frame (81) on the tunnel roof and the support of the anti-fall mechanism (5) on the head frame (81), the tail frame (82) column (2) is manipulated to descend through the hydraulic control system (4), so that the tail frame (82) top beam (3) leaves the tunnel roof, and the anti-fall mechanism (5) of the tail frame (82) is retracted; 2-2 Pulling the tail frame (82): retracting the upper frame assembly (71) and the lower frame assembly (72) at the same time, and pulling the tail frame (82) to slide along the ground to the set position; 2-3 Restoring the tailstock (82) support: Using the hydraulic control system (4), the tailstock (82) column (2) is extended, thereby lifting the tailstock (82) top beam (3) to contact and solidify with the roadway roof; S3. Repeat the above operations to enable the bracket to continuously move by itself.

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