A comprehensive mechanized coal mining face crossheading advanced section roadway support system

Abstract

The application discloses a kind of comprehensive mechanization coal face crossheading advance section roadway support systems, including underground working face crossheading, working face crossheading advance section roadway is divided into deformation intense area, deformation serious area and deformation alleviation area from inside to outside in sequence;Multiple advance frame groups connected by push-pull oil cylinder are arranged in deformation intense area, multiple unit supports connected by connecting oil cylinder are arranged in the middle empty top of each advance frame group, and middle section unit support connected with side unit support by connecting oil cylinder is arranged between two advance frame groups;The application significantly reduces the dynamic damage caused by repeated lifting of advance frame group moving frame to roof, the internal unit support remains supporting state during advance frame group moving frame lowering and lifting, the advance frame group remains supporting state during unit support moving frame, the advance frame group keeps supporting state during moving frame, and the internal stress does not change obviously, so the roof will not be damaged by repeated support of advance frame group moving frame.

Description

Technical Field

[0001] This invention relates to the field of advanced support in fully mechanized coal mining, specifically to an advanced roadway support system for the roadway of a fully mechanized coal mining face. Background Technology

[0002] Currently, the development of fully mechanized longwall retreat mining is relatively rapid. Its main feature is that it mines the entire height in one go and treats the roof of the goaf by the caving method. In order to prevent the roof of the working face from sinking during underground mining, it is necessary to carry out advance support in the working face roadway. In the existing technology, advance supports are used for support. The advance support support consists of two sets of ZCZ15000 / 25 / 42D type advance support groups. The maximum support height of the advance support is 4200mm, the total width is 3560mm, and the support length is 21.5m. The advance support retreats as the working face moves.

[0003] However, when mining is carried out under the following special underground conditions (such as...) Figure 11 (as shown);

[0004] 1. During the mining process, due to changes in geological conditions, 24106 is located in an scour zone, which is unfavorable for controlling the surrounding rock and easily leads to roof subsidence and floor heave deformation; 2. Due to the superposition of the advance support pressure of the 24106 working face and the lateral support pressure of the 24107 goaf, the advance influence range and stress value of the 24106 working face increase; 3. Affected by the mining activity of the 24106 working face, the roof delamination area of ​​the roadway is activated and subsided. During the overall subsidence of the roof, the pressure is transmitted from the two sides to the floor, causing large deformation of the floor heave.

[0005] Specifically, the mining pressure is most intense within 20m of the advance face, with large roof subsidence (up to 200mm) and severe floor heave (over 600mm). Within 20m to 50m of the advance face, the mining pressure is relatively severe, with floor heave reaching 300mm and some roof subsidence. Within 50m to 80m of the advance face, the mining pressure tends to ease, with smaller roof subsidence but still some floor heave (up to 150mm). Beyond 80m of the advance face, the overall deformation of the roadway is small and almost unaffected by mining activities.

[0006] For the aforementioned large-scale deformation area in the underground working face roadway (the affected area of ​​the 24106 working face roadway is approximately 50m ahead), the existing advance support (advance frame group support distance 21.6m) is insufficient to provide support and protection. Moreover, the advance support of the working face roadway moves forward in a step-by-step manner from the inside out as the working face is pushed forward. During the movement of the advance support, the roof is repeatedly supported, which can easily damage the integrity and stability of the roadway roof. In addition, the large-scale deformation area also leads to insufficient height at the end of the working face, resulting in insufficient safety clearance between the end frame and the conveyor, causing the problem of manual bottoming. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a roadway support system for the advanced section of the roadway in a fully mechanized coal mining face.

[0008] This invention is achieved through the following technical solution:

[0009] A comprehensive mechanized coal mining face roadway advance section support system includes an underground working face roadway, and the working face roadway advance section is divided into a severe deformation zone, a serious deformation zone and a mild deformation zone from the inside to the outside.

[0010] Multiple advanced frame groups are set up in the area of ​​severe deformation, which are connected by push-pull hydraulic cylinders. Multiple unit supports are set up in the middle of the open top of each advanced frame group, which are connected by connecting hydraulic cylinders. Between two advanced frame groups, there is a middle unit support connected to the side unit support by connecting hydraulic cylinders. The backward shifting frame of the advanced frame group, unit support, and middle unit support in the area of ​​severe deformation always maintains the support of the advanced section top plate.

[0011] In the severely deformed area, a row of multiple independent unit supports is installed along the advanced section of the roadway in the mild deformation area, directly facing the center of the advanced support group.

[0012] Alternatively, the advanced frame assembly includes multiple hinged base frames on both sides of the bottom, with the upper part of the base frames connected and supported by multiple hydraulic columns to the corresponding top beams. The two base frames and the outer ends of the top beams are connected laterally by adjusting cylinders.

[0013] Alternatively, the unit support inside the advance frame assembly is also equipped with a stabilizing support device, which provides stable support on the base frame of the advance frame assembly when the unit support is moved.

[0014] Further optional, the stabilizing support device includes two support arms hinged to both sides of the unit bracket base, the lower part of each support arm being hinged to the unit bracket base via a support cylinder, and the outer end of the support arm being connected to a support block supported on the inner edge of the base frame.

[0015] Alternatively, the support arm can be a telescopic arm and fixed by a pin. The upper inner side of the base frame of the advanced frame assembly is provided with several rotating slots, and each rotating slot is provided with a supporting rolling element.

[0016] Alternatively, the side of the independent unit support is provided with an anti-tipping device, which includes anti-tipping chains connected to both sides of the top beam of the independent unit support. The outer end of the anti-tipping chain is connected and fixed to the anchor cap of the anchor bolt installed on the roof of the roadway.

[0017] Alternatively, the anti-reverse chain is equipped with an adjusting bolt to adjust its tension.

[0018] Optionally, a displacement warning device for lateral displacement alarm of independent unit support is provided at the connection between the anchor cap and the anti-tipping chain. The displacement warning device includes a frame connected to the lower part of the anchor cap. A mounting sleeve is screwed to the bottom opening of the frame. A gas cylinder extending to the inside of the frame is provided inside the mounting sleeve. A rupture disc is installed on the exhaust pipe at the bottom of the gas cylinder. An alarm whistle connected to the exhaust pipe outlet is provided at the lower part of the rupture disc.

[0019] Alternatively, a stirrup buckle is provided inside the frame and connected to the outer end of the anti-tipping chain, with the inner side of the stirrup buckle fitted against the side wall of the gas cylinder.

[0020] Further optional, the cylinder columns of the unit supports and the middle unit supports within the advanced frame assembly are connected to the hydraulic directional valves of the advanced frame assembly itself via hydraulic pipelines. The hydraulic directional valves are electrically connected to the hydraulic valve actuators, and the hydraulic valve actuators are electrically connected to the support controllers.

[0021] Compared with existing technologies, the beneficial effects of this invention are:

[0022] 1. The implementation of this scheme can significantly reduce the dynamic damage to the top plate caused by repeated lifting and lowering during the movement of the advance frame group. During the movement, lowering and raising of the advance frame group, the internal unit support remains in a supported state. During the movement of the unit support, the advance frame group remains in a supported state. During the movement, the top plate of the advance section remains in a supported state, and the internal stress does not change significantly. The top plate will not be damaged by the repeated support of the advance frame group during the movement.

[0023] 2. The alternating shifting of the advanced frame group and the unit support ensures that the advanced section at the end of the working face has no weak links for support, reducing the subsidence that occurs when the top plate is in a state of no passive support during the shifting process, and avoiding the problem of insufficient safety clearance between the end frame and the transport machine due to insufficient end height, requiring manual lowering.

[0024] 3. The multiple unit supports within the scope of the advanced support group are transformed into step-type self-moving supports. The hydraulic system of the unit support is connected to the electro-hydraulic control of the advanced support group to realize automatic control of one support, which reduces the workload of moving the support and improves safety.

[0025] 4. The length and strength of the advance support have been increased, which effectively controls the bottom heave caused by pressure transmission in the goaf and avoids the situation where the roof pressure exceeds the design range when the working face is pushed to a special geological structure area, resulting in insufficient strength of the advance support and causing the roof pressure at both ends of the working face to crush the advance support or cause roof collapse.

[0026] 5. The support of independent unit supports is safer and more reliable, ensuring the safety of the operating space around the independent unit supports and greatly reducing the safety risks caused by the tilting of the independent unit supports. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the system layout of the present invention;

[0028] Figure 2 It is a three-dimensional structural diagram of the advanced frame assembly and unit support;

[0029] Figure 3 This is a schematic diagram of another state of the advanced frame assembly and unit support;

[0030] Figure 4 yes Figure 3 Enlarged schematic diagram of a local structure;

[0031] Figure 5 This is a structural diagram of the support arm of the unit bracket;

[0032] Figure 6 This is a schematic diagram of the independent unit support structure in use according to the present invention;

[0033] Figure 7 yes Figure 6 A three-dimensional structural diagram of the alarm device;

[0034] Figure 8 yes Figure 7 Schematic diagram of the installation structure of the rupture disc;

[0035] Figure 9 This is a schematic diagram of the independent unit support frame relocation of the present invention;

[0036] Figure 10 This is a diagram of the hydraulic control system for the advanced frame assembly and unit support of this invention;

[0037] Figure 11 This is a schematic diagram of the prior art of this invention;

[0038] In the diagram: 1. Working face roadway; 2. Advance frame assembly; 201. Base frame; 202. Hydraulic column; 203. Top beam; 204. Adjusting cylinder; 205. Rolling element; 3. Push-pull cylinder; 4. Unit support; 5. Middle section unit support; 5. Support arm; 501. Support cylinder; 502. Support block; 503. Pin; 504. Connecting cylinder; 6. Independent unit support; 7. Anti-tipping chain; 8. Adjusting bolt; 9. Anchor bolt; 10. Offset warning device; 11. Frame frame; 12. Mounting sleeve; 13. Gas cylinder; 14. Exhaust pipe; 15. Rupture disc; 16. Alarm whistle; 17. Air inlet; 18. Stirrup buckle; 19. Anchor bolt cap; 20. Hydraulic directional valve; 21. Hydraulic valve actuator; 22. Support controller; 23. Pipeline; 24. Wire rope; 25. Pneumatic winch; 26. Equipment train; 27. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0040] like Figure 1 As shown, a comprehensive mechanized coal mining face roadway advance section support system includes an underground working face roadway 1. The advance section of the working face roadway 1 is divided into three zones from the inside out: a severe deformation zone, a serious deformation zone, and a moderate deformation zone. The severe deformation zone is characterized by large roof subsidence (up to 200 mm) and severe floor heave (over 600 mm). The serious deformation zone is located within 20 m to 50 m of the advance working face, where mine pressure is relatively severe, floor heave reaches 300 mm, and the roof shows a certain degree of subsidence. The moderate deformation zone is located within 50 m to 80 m of the advance working face, where mine pressure tends to be moderate, characterized by smaller roof subsidence, but still some degree of floor heave (maximum floor heave reaches 150 mm).

[0041] The above division of areas can be adjusted according to the actual situation on site. In this way, different support combinations can be used to support the deformation zones divided according to different deformation amounts. Under the premise of ensuring support stability, the use of advanced supports should be minimized (advanced supports are bulky, occupy a large space, and are difficult to move). Different areas can better adapt to different combinations of supports and supports.

[0042] Example 1:

[0043] like Figure 1 and 2As shown, multiple advanced frame groups 2 connected by push-pull cylinders 3 are set in the area of ​​severe deformation. The two advanced frame groups 2 can move by stepping through the connection of the push-pull cylinders 3. The total length of the two advanced frame groups and the push-pull cylinders 3 is 21.6m, which can completely cover the entire area of ​​severe deformation. Multiple unit supports 4 connected by connecting cylinders 6 are set in the middle of the inner cavity of each advanced frame group 2. Two supports can be set in the middle of the left and right support parts of each advanced frame group. The bases of two unit supports 4 within the same advanced frame group are connected by push-pull cylinders 3 with a length of 1.2m, so that they can move by stepping.

[0044] A middle section unit support 5 is installed between the two advanced frame groups 2 and connected to the side unit support 4 via a connecting cylinder 6. The base of the middle section unit support 5 is connected to the outer unit support 4 by a 1.4m cylinder, which realizes the support of the open roof area at the connection of the advanced frame group 2. When the advanced frame group 2, unit support 4, and middle section unit support 5 in the area of ​​severe deformation move backward, one of the supports will always remain supported with the roof of the advanced section. This can significantly reduce the dynamic damage to the roof caused by repeated lifting and lowering when the advanced frame group 2 moves. During the movement, lowering, and raising of the advanced frame group 2, the internal unit support remains in a supported state. During the movement of the unit support, the advanced frame group 2 remains in a supported state. During the movement, the roof of the advanced section roadway remains in a supported state, and the internal stress does not change significantly. The roof will not be damaged by the repeated support of the advanced frame group during the movement.

[0045] In the severely deformed area, a series of independent unit supports 7 are installed along the advanced section of the roadway in the deformation-mitigated area, directly opposite the center of the advanced support group. The independent unit supports 7 are installed between the advanced support group 2 and the equipment train 27 in the deformation-mitigated area, with a total of 16 supports. The center distance between the supports is 2.5m, and the overall support length is 40m. They are installed along the roadway direction directly opposite the center of the advanced support group 2, and the distance from the edge of the base to the production side is not less than 1600mm. This increases the length of the advanced support, effectively controls the floor heave caused by the pressure transmission in the goaf, reduces the amount of manual ground work, and prevents the advanced support from tilting due to the floor heave.

[0046] The advanced frame assembly 2 includes multiple hinged base frames 201 on both sides of the bottom. The upper part of the base frame 201 is connected and supported to the corresponding top beam 203 by multiple hydraulic columns 202. The outer ends of the two base frames 201 and the top beam 203 are connected laterally by adjusting cylinders 204. When the adjusting cylinders 204 at the top and bottom of the advanced frame assembly 2 are retracted to their shortest length, the distance between the bases of the left and right support parts of the advanced frame assembly 2 is no more than 1.2m. This allows the five unit supports 5 and the middle unit support 5 within the advanced range to be supported as a whole, which helps to prevent the middle unit support 5 from tilting (the unit support 5 is arranged separately without support).

[0047] Example 2:

[0048] like Figure 3, 4 As shown, the unit support 4 inside the advanced frame group 2 is also equipped with a stabilizing support device. When the unit support 4 is moved, it is supported on the base frame 201 of the advanced frame group 2 for stable support. In this way, the unit support 4 is not easy to tilt when it is not supported by the roadway roof (in a free state).

[0049] The stabilizing support device includes two support arms 501 hinged to both sides of the base of the unit bracket 4. The lower part of each support arm 501 is hinged and fixed to the base of the unit bracket 4 via a support cylinder 502. The outer end of the support arm 501 is connected to a support block 503 supported on the inner edge of the base frame 201. When the unit bracket 4 is used to support the top plate, the support cylinder 502 is activated to lift the support arm 501 and make it fit against the side of the unit bracket 4 to avoid occupying space. When the unit bracket 4 is moved, the support cylinder 502 unfolds the support arm 501 to support the side edge of the advanced frame group 2, thereby achieving stable support for the unit bracket 4. This not only eliminates the need to narrow the width of the advanced frame group 2, but also greatly increases the range of the area of ​​the advanced frame group 2 that supports the top plate. Moreover, it can always keep the unit bracket in the center position of the advanced frame group 2, making the overall support force on the top plate more uniform, without the need for additional position adjustment of the hydraulic support column.

[0050] like Figure 4 , 5 As shown, the support arm 501 is a telescopic arm and is fixed by a pin 504. The length of the support arm 501 can be adjusted by the pin 504 to adapt to the different widths of the front frame group 2. The upper inner side of the base frame 201 of the front frame group 2 is provided with several rotating grooves. Each rotating groove is provided with a supporting rolling element 205. The rolling element 205 facilitates the rapid movement of the unit support 4.

[0051] Example 3:

[0052] like Figure 6 As shown, the side of the independent unit support 7 is equipped with an anti-tilting device. The anti-tilting device includes anti-tilting chains 8 connected to both sides of the upper top beam of the independent unit support 7. The anti-tilting chains 8 are made of 5t anchor chains. The outer end of the anti-tilting chains 8 is connected and fixed to the anchor cap 20 at the end of the anchor bolt 10 set on the roadway roof. Adjusting bolts 9 are installed on the anti-tilting chains 8 to adjust their tension. In this way, the anti-tilting chains 8 on both sides of the independent unit support 7 prevent tilting and improve the stability of the independent unit support 7 in the severely deformed area without the cooperation of the advanced frame group 2.

[0053] like Figure 6 , 7As shown, a offset warning device 11 for lateral displacement alarm of independent unit bracket 7 is provided at the connection between anchor cap 20 and anti-tipping chain 8. The offset warning device 11 includes a frame 12 connected to the lower part of anchor cap 20. A mounting sleeve 13 is screwed to the bottom opening of frame 12. A gas cylinder 14 extending to the inside of frame 12 is provided inside mounting sleeve 13. A rupture disc 16 is installed on the exhaust pipe 15 at the bottom of gas cylinder 14. Figure 8 As shown), the lower part of the rupture disc 16 is provided with an alarm whistle 17 connected to the outlet of the exhaust pipe 15.

[0054] When the independent unit support 7 experiences partial tilting, the anti-tipping chain 8 on the other side of the tilt direction will be pulled by the stirrup buckle 19 to squeeze the gas cylinder 14 of the offset warning device 11. The gas cylinder 14 deforms under the force, and its internal gas pressure rises sharply. After reaching the burst pressure set by the rupture disc 16, the rupture disc 16 bursts open, causing the exhaust pipe 15 to open. In this way, the gas in the gas cylinder 14 rushes down to the alarm whistle 17, causing the alarm whistle 17 to sound an alarm, thereby reminding the surrounding personnel to quickly move away from the area and readjust the support of the independent unit support 7, ensuring the safety of the surrounding operating space and greatly reducing the safety risks caused by the tilting of the independent unit support 7. In addition, the gas cylinder 14 can also buffer the direct impact of the stirrup buckle 19 on the anchor cap 20, preventing direct impact damage to the end of the anchor 10.

[0055] Depending on the site conditions, the pressure of the rupture disc 16 can be set to 2 bar, and the gas volume in the cylinder 14 can be 1.5-1.8 bar, ensuring that the rupture disc 16 will be ruptured after the cylinder 14 is deformed under stress. At the same time, the gas in the cylinder 14 is nitrogen, which has a high safety profile. The cylinder 14 can be made of metal or polytetrafluoroethylene (PTFE). PTFE cylinders can be recycled and reused after being refilled through the filling port 18.

[0056] The frame 12 is equipped with a stirrup buckle 19 that is connected to the outer end of the anti-tipping chain 8. The inner side of the stirrup buckle 19 is fitted against the side wall of the gas cylinder 14. The adjusting bolt 9 on the anti-tipping chain 8 can always keep it taut to ensure the fit between the stirrup buckle 19 and the side wall of the gas cylinder 14.

[0057] like Figure 10 As shown, the hydraulic cylinder columns of the unit support 4 and the middle unit support 5 within the advanced frame group 2 are connected to the hydraulic directional valve 21 of the advanced frame group 2 itself through hydraulic pipeline 24. The hydraulic directional valve 21 is electrically connected to the hydraulic valve actuator 22, and the hydraulic valve actuator 22 is electrically connected to the support controller 23. The hydraulic systems of multiple frame unit supports within the scope of the advanced frame group 2 are connected to the hydraulic control system of the advanced frame group, realizing automatic control of one frame, reducing the workload of moving the frame, and improving safety.

[0058] Working principle:

[0059] When the working face retreats, the advance support of the roadway needs to be moved and retreated along with the working face;

[0060] 1. Unit support frame; 4. Middle section unit support frame; 5. Moving frame.

[0061] (1) First, lower the outer unit support 4 closest to the working face. When lowering unit support 4, the support worker should operate the electro-hydraulic control of the advanced support group to lower the support. During the lowering process, no one should stand within 5m. Note that personnel should not stand in the direction of the valve port to prevent the unit support from tipping over or the liquid from flowing back and injuring people during the lowering process.

[0062] (2) The frame should be lowered to the lowest height of the support. Once the frame is lowered to the lowest height, the frame lowering operation is complete.

[0063] (3) After the frame is lowered, the connecting cylinder 6, which connects the bases of the two unit supports 4, is used to move the support to the specified step distance (0.8m).

[0064] (4) Raise the top plate of the unit support 4. After the support is raised, the support should be tightly connected to the top. The initial support force of the unit support should reach more than 11.5MPa.

[0065] (5) Repeat the above steps, pull the rear unit support to the specified step distance, and move the middle unit support 5 and the connected unit support 4 according to the above steps.

[0066] 2. The independent unit support 7 in the severely deformed area is moved (e.g., Figure 9 (As shown)

[0067] After the equipment train is moved, the first independent unit support 7 closest to the working face is promptly moved to the outermost position and re-erected. The specific process flow is as follows:

[0068] (1) Before lowering the unit support, manually remove the anti-tipping chain 8 through the stirrup buckle 19. When lowering the support, the support worker operates the hydraulic manual valve handle to lower the support. Note that personnel must not stand in the direction of the valve to prevent the unit support from tipping over or backflowing fluid and injuring people during the lowering process.

[0069] (2) The frame should be lowered to the lowest height of the independent unit support 7. After it is lowered to the lowest height, the frame lowering operation is completed.

[0070] (3) After the frame is lowered, the independent unit support 7 is pushed and moved laterally to adjust its position by using the single hydraulic support and then adjusted to the side of the pedestrian walkway.

[0071] (4) A five-point rope (φ15.5) is suspended above the top plate of the independent unit support 7 towing route. During towing, the top beam of the independent unit support 7 is connected to the steel wire rope above through a special anti-tipping rope (both ends are stirrup buckles) to prevent it from tipping over.

[0072] (5) Use the JQHS-50X12 pneumatic winch 26 with the return pulley to connect the wire rope to the lifting rings on both sides of the unit bracket base, and drag the unit bracket to the vicinity of the equipment train, 2.5m away from the outermost unit bracket.

[0073] (6) Use the single hydraulic prop to adjust the independent unit support 7 to the predetermined support position.

[0074] (7) Raise the support frame to support the top plate. After the support frame is raised, the support frame should be tightly connected to the top. The initial support force of the unit support frame should reach more than 11.5MPa.

[0075] (8) After the support is raised, the anti-tipping chain 8 of the independent unit support 7 should be connected in time to prevent it from tipping over.

[0076] 3. Moving the advanced frame group: First, withdraw the independent unit support 7 in the severely deformed area and set it up to the outermost position closest to the equipment train. Then, pull the inner unit support and finally pull the advanced frame group one by one from front to back and from outside to inside.

[0077] (1) The operating support controller 23 lowers the column so that the top beam 203 of the advanced frame group 2 near the working surface is slightly removed from the top plate;

[0078] (2) When the advance frame group 2 is movable, immediately stop the lowering hydraulic column 202, operate the push-pull cylinder 3 to pull the advance frame group 2 close to the working surface forward along the working surface, and move the advance frame group 2 to the specified step distance;

[0079] (3) Raise the hydraulic column 202 so that the main top beam of the already moved advanced frame group 2 is in close contact with the top plate and continue to supply liquid for 3-5 seconds to ensure that the initial support force reaches 88.5KN (11.5MPa).

[0080] (4) Repeat the above steps to make the other advanced frame group 2 step movement.

[0081] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A roadway support system for the advanced section of a fully mechanized coal mining face, comprising an underground working face roadway (1), characterized in that: The working face roadway (1) advance section is divided into three zones from the inside out: a zone of intense deformation, a zone of severe deformation, and a zone of moderate deformation. Multiple advanced frame groups (2) connected by push-pull cylinders (3) are provided in the severely deformable zone. Multiple unit supports (4) connected by connecting cylinders (6) are provided in the middle of the open top of each advanced frame group (2). A middle unit support (5) connected to the side unit support (4) by connecting cylinders (6) is provided between two advanced frame groups (2). The backward movement of the advanced frame group (2), unit support (4), and middle unit support (5) in the severely deformable zone is always kept in contact with the top plate of the advanced section. The severely deformed area is supported by a row of multiple independent unit supports (7) facing the center of the advanced support group along the advanced section of the roadway in the mild deformation area; The side of the independent unit support (7) is provided with an anti-tipping device, which includes anti-tipping chains (8) connected to both sides of the top beam of the independent unit support (7). The outer end of the anti-tipping chain (8) is connected and fixed to the anchor cap (20) at the end of the anchor bolt (10) provided on the top plate of the roadway. The anchor cap (20) is connected to the anti-tipping chain (8) and a displacement warning device (11) is provided at the connection point to the independent unit support (7) for lateral displacement alarm. The displacement warning device (11) includes a frame (12) connected to the lower part of the anchor cap (20). A mounting sleeve (13) is screwed to the bottom opening of the frame (12). A gas cylinder (14) extending to the inside of the frame (12) is provided in the mounting sleeve (13). A rupture disc (16) is installed on the exhaust pipe (15) at the bottom of the gas cylinder (14). An alarm whistle (17) connected to the outlet of the exhaust pipe (15) is provided at the lower part of the rupture disc (16). The frame (12) is provided with a stirrup buckle (19) that is connected to the outer end of the anti-tipping chain (8), and the inner side of the stirrup buckle (19) is fitted to the side wall of the gas cylinder (14).

2. A roadway support system for the advanced section of a fully mechanized coal mining face according to claim 1, characterized in that: The advanced frame assembly (2) includes multiple hinged base frames (201) on both sides of the bottom. The upper part of the base frame (201) is connected and supported to the corresponding top beam (203) through multiple hydraulic columns (202). The outer ends of the two base frames (201) and top beams (203) are connected laterally through adjusting cylinders (204).

3. A roadway support system for the advanced section of a fully mechanized coal mining face according to claim 1, characterized in that: The unit support (4) inside the advanced frame group (2) is also provided with a stabilizing support device, which provides stable support on the base frame (201) of the advanced frame group (2) when the unit support (4) is moved.

4. A roadway support system for the advanced section of a fully mechanized coal mining face according to claim 3, characterized in that: The stabilizing support device includes two support arms (501) hinged on both sides of the base of the unit bracket (4). The lower part of each support arm (501) is hinged to the base of the unit bracket (4) via a support cylinder (502). The outer end of the support arm (501) is connected to a support block (503) supported on the inner edge of the base frame (201).

5. A roadway support system for the advanced section of a fully mechanized coal mining face according to claim 4, characterized in that: The support arm (501) is a telescopic arm and is fixed by a pin (504). The upper inner side of the base frame (201) of the advanced frame assembly (2) is provided with several rotating grooves, and each rotating groove is provided with a supporting rolling element (205).

6. A roadway support system for the advanced section of a fully mechanized coal mining face according to claim 1, characterized in that: The anti-tipping chain (8) is equipped with an adjusting bolt (9) to adjust its tension.

7. A roadway support system for the advanced section of a fully mechanized coal mining face according to claim 1, characterized in that: The cylinder columns of the unit support (4) and the middle unit support (5) inside the advanced frame group (2) are connected to the hydraulic reversing valve (21) of the advanced frame group (2) itself through hydraulic pipeline (24). The hydraulic reversing valve (21) is electrically connected to the hydraulic valve driver (22), and the hydraulic valve driver (22) is electrically connected to the support controller (23).

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