Anti-sloughing supporting device for mining

Abstract

The utility model discloses an anti-sloughing supporting device for mining, which comprises a concentric-square-shaped bottom plate, a top plate is arranged above the concentric-square-shaped bottom plate, a rectangular hole is arranged on the left side of the front side of the top plate, a driving motor is fixedly arranged on the inner wall of the top of the rectangular hole, and a PLC (Programmable Logic Controller) is fixedly connected on the inner wall of the bottom of the rectangular hole; the left side of the bottom of the top plate is fixedly connected with an audible-visual alarm By arranging a series of structures, the single-drive four-point synchronous driving supporting plate is convenient to move upwards to carry out pressure control supporting on the top wall of the mine tunnel, the number of driving motors is reduced, the energy-saving effect is improved, and automatic alarm is convenient to remind personnel when the pressure is increased due to accidental collapse of the top wall of the mine tunnel; according to the technical scheme, personnel can conveniently know in time to carry out treatment and risk avoiding work, the use safety is improved, slag stopping on the two sides is facilitated, the slag stopping heights of the two sides are integrally increased when the supporting device is lifted, the phenomenon that soil slag on the side slides to the concentric-square-shaped bottom plate to affect passing of the personnel is reduced, and the use effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mining support, in particular to an anti-collapse support device for mining. Background Art

[0002] In the process of mineral mining, for deeply buried mineral deposits, it is necessary to dig mine holes for mining, so it is necessary to support the mine tunnels connecting the mine holes to prevent them from collapsing; in this regard, after searching, announcement number CN215718847U discloses an anti-collapse support device for mining, including a base plate, a servo motor and a switch, a base is placed on the upper end of the base plate, and a support column is fixedly connected to the upper end of the base, a battery is embedded in the center of the base, the support column is divided into a motor room and a lifting room, and the motor room is placed below the lifting room, a servo motor is fixedly connected to the bottom end of the motor room, and the servo motor shaft is connected to one end of a threaded rod, the other end of the threaded rod passes through the lifting room and is threadedly connected to a limit plate and a support rod, and the limit plate is fixedly connected to the bottom end of the support rod, the upper end of the support rod passes through the lifting room and is fixedly connected to the bottom end of the mounting seat, and a support plate is placed on the upper end of the mounting seat; it is provided with a lifting device, which is conducive to adjusting the height of the device and is convenient for coping with mining at various heights.

[0003] The above-mentioned prior art realizes driving the support plate to rise and support the top wall of the mine tunnel through four servo motors in conjunction with four screws and other structures, thereby achieving a supporting and anti-collapse effect. However, there are the following deficiencies when in use: 1. The method of using four servo motors to perform four-point independent lifting and lowering control consumes a lot of energy and the energy saving performance is not ideal; 2. When the top wall of the mine tunnel collapses unexpectedly during support, it cannot automatically remind personnel in time, which makes it inconvenient for personnel to know in time to deal with and avoid risks, and the safety of use is not ideal; 3. There is a lack of a structure for integrally shielding the side soil and debris, and the side soil and debris are easy to slide onto the base plate and affect the passage of personnel; in view of this, the present application proposes an anti-collapse support device for mining. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-collapse support device for mining, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-collapse support device for mining, comprising a circular bottom plate, a top plate is arranged above the circular bottom plate, a rectangular hole is opened on the left side of the front side of the top plate, a driving motor is fixedly installed on the top inner wall of the rectangular hole, a PLC controller is fixedly connected to the bottom inner wall of the rectangular hole, an audible and visual alarm is fixedly connected to the left side of the bottom of the top plate, and the audible and visual alarm and the driving motor are both electrically connected to the PLC controller;

[0006] A dustproof linkage type threaded lifting assembly is installed between the bottom inner wall of the circular bottom plate and the bottom of the top plate, a square rotating rod fixedly connected to the bottom end of the output shaft of the driving motor is rotatably installed on the left side of the bottom of the top plate, and the dustproof linkage type threaded lifting assembly is slidably sleeved on the square rotating rod, and a mine tunnel top wall pressure measuring support assembly electrically connected to the PLC controller is fixedly connected to the top of the top plate, and telescopic slag blocking assemblies are fixedly connected between the two sides of the circular bottom plate and the bottom of the top plate. The dustproof linkage type threaded lifting assembly is used to rotate the square rotating rod at four points when the driving motor starts to drive the square rotating rod to rotate. The roof is driven synchronously to move up and down stably. The pressure measuring and supporting assembly of the mine tunnel roof is used to prevent the mine tunnel roof from collapsing and detect the supporting pressure when the roof moves up, and transmit the pressure value to the PLC controller. The PLC controller controls the automatic shutdown of the driving motor according to the supporting pressure value. When the mine tunnel roof collapses and sinks, the downward squeezing force will be greatly increased. When the pressure value exceeds the preset alarm pressure value, the PLC controller controls the sound and light alarm to automatically turn on for alarm reminder. The telescopic slag blocking assembly is used to increase the side slag blocking height when the roof moves up.

[0007] Preferably, the dust-proof linkage threaded lifting assembly includes four screws rotatably connected to the bottom inner wall of the circular bottom plate in a rectangular shape, sprockets are fixedly sleeved on the four screws, and the same chain is transmission-connected to the four sprockets, the top of the screw extends to the top of the circular bottom plate, and the threaded sleeve on the screw is provided with an internal threaded sleeve, the tops of the four internal threaded sleeves are fixedly connected to the bottom of the top plate, and an outer edge is integrally provided at the outer bottom of the internal threaded sleeve, a telescopic dust-proof rubber sleeve is fixedly connected between the bottom of the outer edge and the top of the circular bottom plate, the screw is located in the corresponding telescopic dust-proof rubber sleeve, and the screw sliding sleeve located on the left front side is provided on the square rotating rod.

[0008] Preferably, the mine tunnel top wall pressure measurement support assembly includes four pressure sensors fixedly connected to the top of the top plate in a rectangular shape, the tops of the four pressure sensors are fixedly connected to the same support plate, and the four pressure sensors are all electrically connected to the PLC controller.

[0009] Preferably, the telescopic slag blocking assembly includes an L-shaped baffle, and the two L-shaped baffles are symmetrically arranged. The bottom of the adjacent side of the two L-shaped baffles is respectively fixedly connected to the two sides of the circular bottom plate, and the inner wall of the adjacent side of the two L-shaped baffles is in sliding contact with a vertical baffle, and the top of the two vertical baffles is fixedly connected to the bottom of the top plate.

[0010] Preferably, a battery is fixedly installed on the left side of the bottom of the top plate, and the drive motor, PLC controller and sound and light alarm are all electrically connected to the battery.

[0011] Preferably, a square sliding hole is provided at the top end of the screw rod located at the left front side, and the inner wall of the square sliding hole is slidably fitted with the outer side of the square rotating rod.

[0012] Preferably, the sliding sleeve on the internal threaded sleeve is provided with a guide sleeve, and the adjacent sides of the two L-shaped baffles are respectively fixedly connected to the outer sides of the corresponding two guide sleeves.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. This anti-collapse support device for mining is coordinated with the set circular bottom plate, top plate, PLC controller, dust-proof linkage type threaded lifting assembly and mine tunnel top wall pressure measurement support assembly. After the PLC controller is used to pre-set the closing pressure value of the control driving motor according to the support requirements, when the driving motor is started, the top plate and the support plate can be driven upward by a single drive at four points to control the pressure of the mine tunnel top wall. The automatic pressure control support can reduce the number of driving motors while automatically and stably supporting and preventing collapse, thereby improving the energy saving effect.

[0015] 2. This anti-collapse support device for mining, through the cooperation of the PLC controller, the top plate of the mine tunnel top wall pressure measurement support assembly and the sound and light alarm, can monitor the support pressure in real time after the pressure value for controlling the sound and light alarm to be turned on is preset by the PLC controller according to the support requirements, and this pressure value is greater than the pressure value for controlling the driving motor to be turned off, and automatically alarms to remind personnel when the mine tunnel top wall collapses unexpectedly and the pressure increases, so that personnel can be informed in time to handle and avoid risks, thereby improving the safety of use;

[0016] 3. This anti-collapse support device for mining, through the cooperation of the set top plate and the telescopic slag blocking assembly, can increase the slag blocking height on both sides as the support is raised, can stably block the soil and debris on the sides, reduce the phenomenon of soil and debris on the sides sliding onto the circular bottom plate to affect the passage of people, and improve the use effect.

[0017] The utility model is provided with a series of structures, which is convenient for a single-drive four-point synchronously driving the support plate to move up to control the pressure and support the top wall of the mine tunnel, thereby reducing the number of driving motors and improving the energy saving effect. It is convenient for automatic alarm to remind personnel when the top wall of the mine tunnel collapses unexpectedly and the pressure increases, so that personnel can be informed in time to take measures and avoid risks, thereby improving safety in use. It is also convenient for slag blocking on both sides and the slag blocking height on both sides can be increased when the support is raised, thereby reducing the phenomenon that the side soil residue slides onto the circular bottom plate and affects the passage of personnel, thereby improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a mine collapse prevention support device proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of a mine collapse prevention support device proposed by the utility model;

[0020] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of part A in the figure.

[0021] In the figure: 1. circular bottom plate; 2. L-shaped baffle; 3. vertical baffle; 4. top plate; 5. guide sleeve; 6. internal thread sleeve; 7. screw; 8. chain; 9. sprocket; 10. telescopic dustproof rubber sleeve; 11. square sliding hole; 12. square rotating rod; 13. driving motor; 14. PLC controller; 15. sound and light alarm; 16. support plate; 17. pressure sensor. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 3 As shown, the present embodiment proposes an anti-collapse support device for mining, comprising a circular bottom plate 1, a top plate 4 is arranged above the circular bottom plate 1, a rectangular hole is opened on the left side of the front side of the top plate 4, a driving motor 13 is fixedly installed on the top inner wall of the rectangular hole, a PLC controller 14 is fixedly connected to the bottom inner wall of the rectangular hole, a sound and light alarm 15 is fixedly connected to the left side of the bottom of the top plate 4, the sound and light alarm 15 and the driving motor 13 are electrically connected to the PLC controller 14, a battery is fixedly installed on the left side of the bottom of the top plate 4, the driving motor 13, the PLC controller 14 and the sound and light alarm 15 are electrically connected to the battery, so as to provide power to the driving motor 13, the PLC controller 14 and the sound and light alarm 15;

[0024] A dustproof linkage type threaded lifting assembly is installed between the bottom inner wall of the circular bottom plate 1 and the bottom of the top plate 4, and a square rotating rod 12 fixedly connected to the bottom end of the output shaft of the driving motor 13 is rotatably installed on the left side of the bottom of the top plate 4, wherein a round through hole connected to the rectangular hole is opened on the left side of the bottom of the top plate 4, and a first bearing is fixedly sleeved in the round through hole, and the inner side of the inner ring of the first bearing is fixedly connected to the outer side of the square rotating rod 12, which plays the effect of rotatably installing the square rotating rod 12, and the dustproof linkage type threaded lifting assembly is slidably sleeved on the square rotating rod 12, and the top of the top plate 4 is fixedly connected to a mine tunnel top wall pressure measuring support assembly electrically connected to the PLC controller 14, and both sides of the circular bottom plate 1 are fixedly connected to the bottom of the top plate 4 with telescopic The slag blocking assembly and the dust-proof linkage threaded lifting assembly are used to synchronously drive the top plate 4 to move up and down stably at four points when the driving motor 13 starts to drive the rotating rod 12 to rotate. The mine tunnel top wall pressure measurement and support assembly is used to prevent the mine tunnel top wall from collapsing and detect the support pressure when the top plate 4 moves up, and transmit the pressure value to the PLC controller 14. The PLC controller 14 is used to control the drive motor 13 to automatically shut down according to the support pressure value. When the mine tunnel top wall collapses and sinks, the downward squeezing force will be greatly increased. When the pressure value exceeds the preset alarm pressure value, the PLC controller 14 is used to control the sound and light alarm 15 to automatically start an alarm reminder. The telescopic slag blocking assembly is used to increase the side slag blocking height when the top plate 4 moves up.

[0025] Specifically, the dustproof linkage threaded lifting assembly includes four screw rods 7 rotatably connected to the inner wall of the bottom of the circular bottom plate 1 in a rectangular shape, wherein the inner wall of the bottom of the circular bottom plate 1 is fixedly connected with four second bearings in a rectangular shape, and the top of the circular bottom plate 1 is provided with four round holes, and a third bearing is fixedly sleeved in the round holes, and the inner ring of the third bearing and the inner ring of the second bearing are fixedly sleeved with the outer side of the corresponding screw rod 7, so as to achieve the effect of rotating and installing the screw rod 7, and a sprocket 9 is fixedly sleeved on each of the four screw rods 7, and the four sprockets 9 are fixedly sleeved. The transmission connection is connected with the same chain 8. The top of the screw rod 7 extends to the top of the circular bottom plate 1. The screw rod 7 is provided with an internal threaded sleeve 6. The tops of the four internal threaded sleeves 6 are fixedly connected to the bottom of the top plate 4. The outer bottom of the internal threaded sleeve 6 is integrally provided with an outer edge. The bottom of the outer edge is fixedly connected with a telescopic dustproof rubber sleeve 10 between the top of the circular bottom plate 1. The screw rod 7 is located in the corresponding telescopic dustproof rubber sleeve 10. The screw rod 7 located on the left front side is slidably sleeved on the square rotating rod 12, wherein the screw rod located on the left front side A square sliding hole 11 is provided at the top of 7, and the inner wall of the square sliding hole 11 fits the sliding sleeve with the outer side of the square rotating rod 12, which facilitates the vertical sliding of the square rotating rod 12 in the square sliding hole 11. By utilizing the sliding sleeve connection of the square piece and its angular shape, when the square rotating rod 12 rotates, the corners of the square sliding hole 11 can be integrally broken to drive the left front screw 7 to rotate; the screw 7, sprocket 9, chain 8, internal threaded sleeve 6 and telescopic dustproof rubber sleeve 10 are arranged to cooperate, and when the square rotating rod 12 rotates, it will be integrally broken to drive The screw rod 7 on the left front side rotates, and the screw rod 7 on the left front side drives the sprocket wheel 9 on the left front side to rotate. The sprocket wheel 9 on the left front side drives the other three screw rods 7 to rotate synchronously through the chain 8 and the other three sprocket wheels 9 in turn. The synchronous rotation of the four screw rods 7 is used to drive the four internal threaded sleeves 6 to move up and down synchronously, and stretch or compress the telescopic dustproof rubber sleeves 10. The four internal threaded sleeves 6 move up and down synchronously to realize the four-point synchronous driving of the top plate 4 to move up and down stably, and the telescopic dustproof rubber sleeves 10 are used to shield the corresponding screw rods 7 for dust protection.

[0026] Furthermore, the mine tunnel top wall pressure measurement and support assembly includes four pressure sensors 17 fixedly connected to the top of the roof 4 in a rectangular shape, and the top of the four pressure sensors 17 is fixedly connected to the same support plate 16, and the four pressure sensors 17 are electrically connected to the PLC controller 14; the set pressure sensors 17 and the support plate 16 cooperate, and when the top plate 4 moves upward, the four pressure sensors 17 drive the support plate 16 to move upward, so as to prevent the mine tunnel top wall from collapsing, and the pressure sensors 17 are used to detect the applied support squeezing pressure, and transmit the pressure value to the PLC controller 14. When the preset support pressure is reached, the PLC controller 14 controls the drive motor 13 to automatically shut down, so as to achieve the effect of automatic stable pressure control support. When the mine tunnel top wall collapses and sinks, the downward squeezing force on the support plate 16 will be greatly increased, thereby increasing the squeezing force on the pressure sensor 17, so that the pressure value detected and transmitted by it is greatly increased.

[0027] Furthermore, the telescopic slag blocking assembly includes an L-shaped baffle 2, and two L-shaped baffles 2 are symmetrically arranged. The bottom of the adjacent side of the two L-shaped baffles 2 are respectively fixedly connected to the two sides of the circular bottom plate 1, and the inner wall of the adjacent side of the two L-shaped baffles 2 is in sliding contact with a vertical baffle 3. The tops of the two vertical baffles 3 are fixedly connected to the bottom of the top plate 4, and a guide sleeve 5 is provided on the sliding sleeve on the internal threaded sleeve 6. The adjacent sides of the two L-shaped baffles 2 are respectively fixedly connected to the outer sides of the corresponding two guide sleeves 5, which plays an effect of vertically guiding the internal threaded sleeve 6; the set L-shaped baffle 2 and the vertical baffle 3 cooperate to block slag at the side to prevent the side soil debris from sliding onto the circular bottom plate 1 and affecting the normal passing work, and the top plate 4 is used to move up to drive the two vertical baffles 3 to slide upward in the corresponding L-shaped baffle 2, so as to achieve the effect of increasing the side slag blocking height as a whole when the support is raised.

[0028] The method of using this embodiment is: pre-set the closing pressure value of the control drive motor 13 and the opening pressure value of the sound and light alarm 15 according to the support requirements using the PLC controller 14, wherein the opening pressure value of the sound and light alarm 15 is greater than the closing pressure value of the drive motor 13; during mining work, place the device at a position in the mine tunnel that needs support, and then start the drive motor 13 in the positive direction to drive the square rotating rod 12 to rotate; the square rotating rod 12 drives the left front screw 7 to rotate through the corners of the square sliding hole 11; the left front screw 7 drives the left front sprocket 9 to rotate; the left front sprocket 9 drives the other three sprockets 9 to rotate through the chain 8; the other three sprockets 9 drive the other three screws 7 to rotate synchronously as a whole; the synchronous rotation of the four screws 7 drives the four internal threaded sleeves 6 to move upward synchronously; the internal threaded sleeve 6 slides upward in the corresponding guide sleeve 5 and stretches the telescopic dustproof rubber sleeve 10, and the four internal threaded sleeves 6 are used to move upward synchronously The four-point synchronous driving top plate 4 is realized to move upward stably. The top plate 4 drives the support plate 16 to move upward through four pressure sensors 17 to support and prevent the top wall of the mine tunnel from collapsing. The pressure sensor 17 detects the applied support squeezing pressure and transmits the pressure value to the PLC controller 14. When the preset support pressure is reached, the PLC controller 14 controls the drive motor 13 to automatically shut down, so as to achieve the effect of automatic stable pressure control support. The single-drive four-point synchronous driving upward support method is used, and there is no need to set multiple drive motors 13, so as to improve the energy saving effect. In addition, when the top wall of the mine tunnel collapses and sinks, the downward squeezing pressure on the support plate 16 will be greatly increased, thereby increasing the squeezing pressure on the pressure sensor 17, so that the pressure value detected and transmitted by it is greatly increased. When the pressure value exceeds the preset value, the PLC controller 14 controls the sound and light alarm 15 to automatically start the alarm reminder work, so that the personnel can know in time to deal with and avoid risks, and improve the safety of use.

[0029] When the top plate 4 moves up, it also drives the two vertical baffles 3 to slide upward in the corresponding L-shaped baffles 2. The L-shaped baffles 2 and the corresponding vertical baffles 3 cooperate to achieve the effect of blocking slag on the sides. The two vertical baffles 3 follow the top plate 4 to move up as a whole, and can automatically increase and adjust the slag blocking height on the sides during support, thereby achieving stable shielding of the sides, reducing the phenomenon of soil debris on the sides sliding onto the circular bottom plate 1 and affecting the passage of people, and improving the use effect.

[0030] In addition, when the mine tunnel is long, multiple devices of the present invention can be used in loose positions in the mine tunnel to arrange and support to prevent collapse, or multiple devices of the present invention can be used to arrange and support at equal intervals according to the usage; the PLC controller 14, drive motor 13, sound and light alarm 15 and pressure sensor 17 in the utility model are well known to those skilled in the art, and are all conventional means or common knowledge. In addition, the PLC controller 14 receives the pressure value transmitted by the pressure sensor 17 and controls the drive motor 13 to turn off and the sound and light alarm 15 to turn on according to the preset pressure value. This is a programmable controller parameter control method well known to those skilled in the art, which is a conventional means or common knowledge and will not be repeated here.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A mine anti-collapse support device, comprising a circular bottom plate (1), characterized in that: A top plate (4) is arranged above the circular bottom plate (1), a rectangular hole is opened on the left front side of the top plate (4), a driving motor (13) is fixedly mounted on the top inner wall of the rectangular hole, a PLC controller (14) is fixedly connected to the bottom inner wall of the rectangular hole, an audible and visual alarm (15) is fixedly connected to the left bottom side of the top plate (4), and the audible and visual alarm (15) and the driving motor (13) are both electrically connected to the PLC controller (14); A dustproof linkage type threaded lifting assembly is installed between the bottom inner wall of the circular bottom plate (1) and the bottom of the top plate (4); a square rotating rod (12) fixedly connected to the bottom end of the output shaft of the driving motor (13) is rotatably installed on the left side of the bottom of the top plate (4); the dustproof linkage type threaded lifting assembly is slidably sleeved on the square rotating rod (12); a mine tunnel top wall pressure measuring support assembly electrically connected to the PLC controller (14) is fixedly connected to the top of the top plate (4); and telescopic slag blocking assemblies are fixedly connected between the two sides of the circular bottom plate (1) and the bottom of the top plate (4).

2. The anti-collapse support device for mining according to claim 1, characterized in that: The dustproof linkage threaded lifting assembly comprises four screw rods (7) rotatably connected to the inner wall of the bottom of the circular bottom plate (1) in a rectangular shape, sprockets (9) are fixedly sleeved on the four screw rods (7), and the four sprockets (9) are transmission-connected with the same chain (8), the top end of the screw rod (7) extends to the top of the circular bottom plate (1), the screw rod (7) is threadedly sleeved with an internal thread sleeve (6), the top ends of the four internal thread sleeves (6) are fixedly connected to the bottom of the top plate (4), the outer bottom of the internal thread sleeve (6) is integrally provided with an outer edge, and a telescopic dustproof rubber sleeve (10) is fixedly connected between the bottom of the outer edge and the top of the circular bottom plate (1), the screw rod (7) is located in the corresponding telescopic dustproof rubber sleeve (10), and the screw rod (7) located on the left front side is slidingly sleeved on the square rotating rod (12).

3. The anti-collapse support device for mining according to claim 2, characterized in that: The mine tunnel top wall pressure measurement support assembly comprises four pressure sensors (17) fixedly connected to the top of the top plate (4) in a rectangular shape, the tops of the four pressure sensors (17) are fixedly connected to the same support plate (16), and the four pressure sensors (17) are all electrically connected to the PLC controller (14).

4. The anti-collapse support device for mining according to claim 3, characterized in that: The telescopic slag blocking assembly comprises an L-shaped baffle (2), wherein two L-shaped baffles (2) are symmetrically arranged, and the bottoms of the adjacent sides of the two L-shaped baffles (2) are respectively fixedly connected to the two sides of the circular bottom plate (1), and the inner walls of the adjacent sides of the two L-shaped baffles (2) are both in sliding contact with vertical baffles (3), and the tops of the two vertical baffles (3) are both fixedly connected to the bottom of the top plate (4).

5. The anti-collapse support device for mining according to claim 1, characterized in that: A storage battery is fixedly installed on the left side of the bottom of the top plate (4), and the drive motor (13), the PLC controller (14) and the sound and light alarm (15) are all electrically connected to the storage battery.

6. The anti-collapse support device for mining according to claim 2, characterized in that: A square sliding hole (11) is provided at the top end of the screw rod (7) located at the left front side, and the inner wall of the square sliding hole (11) is slidably fitted with the outer side of the square rotating rod (12).

7. The anti-collapse support device for mining according to claim 4, characterized in that: The sliding sleeve on the internal threaded sleeve (6) is provided with a guide sleeve (5), and the adjacent sides of the two L-shaped baffles (2) are respectively fixedly connected to the outer sides of the corresponding two guide sleeves (5).

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