Supporting equipment for preventing roof fall in dynamic pressure influence area of gob-side entry retaining of underground mine

Abstract

The invention relates to the technical field of coal mine underground supporting, and particularly discloses underground mine gob-side entry retaining dynamic pressure affected zone roof fall prevention supporting equipment which comprises a support assembly, a splicing assembly is installed at the front end of the support assembly, a hydraulic supporting assembly is installed at the rear end of the support assembly, and a telescopic supporting assembly is installed below the support assembly. By arranging the hydraulic supporting assembly and the telescopic supporting assembly, limitation of longitudinal movement is achieved by means of a gear and a hydraulic mechanism, the risk of collapse of the device is reduced, and the device has the advantages of being convenient to use, high in practicability and high in practicability. The problem that a traditional support cannot relieve top impact force is solved, meanwhile, through the arrangement of the water filtering assembly and the material stacking assembly, broken objects falling into a roadway and spraying water can be collected and utilized in a centralized mode through the gravity action and the difference of spring compression amount, and the use effect is improved. The problem that the top caving objects of the dynamic pressure influence area need to be cleaned repeatedly and are not easy to centrally utilize is solved.

Description

Technical Field

[0001] The invention relates to the technical field of underground coal mine support, and more specifically to a support device for preventing roof collapse in a dynamic pressure influence zone along a gob-retained lane in an underground mine. Background Art

[0002] Roof fall is the collapse of the upper ore rock layer during the mining process. Roof fall accidents are essentially caused by the loss of support of the damaged roof. Since the previously balanced mine pressure is destroyed after mining, it often occurs in the roof, that is, during the period of pressure from the rock layer above the coal seam. Roof fall accidents are one of the five major disasters in coal mines, accounting for more than 60% of all accidents and about 40% of casualties. Therefore, support for tunnel roof fall is particularly important.

[0003] The existing traditional support device support method is as follows: a support method of unit support and single hydraulic support with hinged top beam is adopted, wherein the support unit is arranged on the top cutting side, and two single support pillars are arranged on the non-mining side, with hinged top beam. The unit support of the chute and the two hydraulic support are parallel to the direction of the tunnel and perpendicular to the top and bottom plates. The top plate support anchor plate and anchor cap in the tunnel are firmly fixed with wire. When the top beam cannot be connected to the top, it is necessary to use a board shed or road timber to make a "tic-tac-toe" wood pile to connect the top to ensure that the single support under the top beam does not deform. This method has the advantages of easy erection, high degree of freedom, and good adaptability to tunnels, but lacks measures to protect against roof collapse accidents.

[0004] In the analysis of existing support devices, it can be found that traditional tunnel supports have the following problems: First, when the tunnel is under periodic pressure, the rocks from the collapsed roof may rush into the tunnel or cause the initial roof sinking of the tunnel. Traditional supports have no countermeasures for this. Under excessive roof impact force, the device is at risk of collapse. The device as a whole is too dependent on the stiffness of the support body, so optimization measures need to be considered; in addition, since the tunnels in the advance support area and the temporary support area after the support have not yet stabilized, they are greatly affected by mining. The top of the tunnel is far away from the side of the tunnel, so small pieces of broken rocks are prone to fall. At the same time, water drips from the rocks on the top, causing damage to the tunnel environment, thereby increasing the workload of underground personnel. The support device can be optimized for these problems. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a support device for preventing roof falls in the dynamic pressure influence zone of the gob-side tunnel retaining in an underground mine, so as to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a support device for preventing roof falls in a dynamic pressure-affected zone of a gob-side tunnel in an underground mine, comprising a support assembly, a splicing assembly is installed at the front end of the support assembly, a hydraulic support assembly is installed at the rear end of the support assembly, a telescopic support assembly is installed below the support assembly, a water filter assembly is installed at the rear side of the hydraulic support assembly, and a stockpiling assembly is installed at the rear side of the water filter assembly;

[0007] Furthermore, the support assembly includes a main column, which includes a column core and a column outer wall. A piston column is installed at the upper end of the column core, and two one-way valves are opened on both sides of the upper end of the piston column. A hydraulic flow chamber is installed on the outer side of the piston column, and two liquid inlets are opened at the bottom end of the hydraulic flow chamber, and a liquid outlet is opened at the top of the hydraulic flow chamber. An upper push-up block is installed at the upper end of the column outer wall, and a pushing chamber is opened between the upper push-up block and the hydraulic flow chamber.

[0008] Furthermore, a slow flow port is installed at the lower end of the push chamber, a liquid buffer chamber is opened below the hydraulic flow chamber, a lower circulation port is opened at the bottom of the liquid buffer chamber, a lower circulation pipe is installed at the lower end of the lower circulation port, and a hydraulic pump is installed at the bottom end of the lower circulation pipe.

[0009] Furthermore, a descent buffer assembly is installed on the outside of the column core, and the descent buffer assembly is connected to the inner wall of the main column. The descent buffer assembly includes a blocking ratchet, a locking contact is installed on the outside of the blocking ratchet, a limiting rotary arm is installed on the upper end of the blocking ratchet, and a buffer spring is installed inside the limiting rotary arm.

[0010] Furthermore, the support assembly includes a top crossbeam, a secondary support is installed below the top crossbeam, a tooth groove is opened in the middle position of the secondary support, a driven gear is installed in the middle position of the secondary support, the driven gear is meshed with the tooth groove of the secondary support, a transverse saw blade is installed above the driven gear, the transverse saw blade is meshed with the driven gear, a moving center axis is installed at the end of the transverse saw blade away from the driven gear, support rockers are hinged above and below the moving center axis, the support rocker above the moving center axis is connected to the top crossbeam, a bottom rotating shaft is installed at the lower end of the other support rocker, a support base is installed below the bottom rotating shaft, a support spring is installed at the upper end of the bottom rotating shaft, and the upper end of the support spring is connected to the top crossbeam.

[0011] Furthermore, a falling object slide rail is installed at the front end of the top crossbeam, a water filter port is installed at the rear end of the falling object slide rail, a gathering funnel is installed at the lower end of the water filter port, a drainage channel is installed at the lower end of the gathering funnel, the lower end of the drainage channel is connected to the hydraulic pump, and a water filter shell is installed outside the drainage channel.

[0012] Furthermore, a blanking support plate is installed at the rear end of the water filter housing, and a blanking connecting plate is installed at the upper end of the blanking support plate. A slide groove is opened on the blanking support plate, and the blanking connecting plate can slide up and down on the surface of the blanking support plate. The position of the blanking connecting plate is lower than the water filter outlet, and a blanking spring is installed below the blanking connecting plate. A discharge flap is installed at the end of the blanking connecting plate away from the water filter assembly, and a return spring is installed below the discharge flap, and the other end of the return spring is connected to the lower end of the blanking connecting plate.

[0013] Furthermore, the splicing assembly includes a splicing outer shell and a splicing middle column, a limiting slider is installed on the periphery of the splicing middle column, and the limiting slider can slide left and right on the periphery of the splicing middle column, and a locking round block is installed on the end of the splicing middle column away from the bracket assembly. The device located at the opposite position also has a splicing assembly installed at the front end of the bracket assembly, and a telescopic spring and a spring baffle are installed inside the splicing outer shell, a locking bolt block is installed on the inner side of the telescopic spring, and an unlocking spring is installed on the side of the spring baffle close to the bracket assembly.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The present invention is provided with a hydraulic support assembly and a telescopic support assembly, which is conducive to using gears and hydraulic mechanisms to achieve buffering and restriction of longitudinal movement, thereby reducing the risk of collapse of the device due to top fall, and solving the problem that traditional supports cannot alleviate top impact force.

[0016] 2. The present invention is provided with a water filtering component and a material piling component, which is beneficial to utilizing the natural sliding of objects under the action of gravity and the difference in compression of springs when they are subjected to pressures of different sizes, so that the broken objects that fall when the tunnel is affected by dynamic pressure and the water generated when the tunnel is built can be collected and utilized in a centralized manner, thereby solving the problem that the fallen objects at the top of the dynamic pressure affected area need to be repeatedly cleaned and are difficult to be utilized in a centralized manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a cross-sectional view of the hydraulic support assembly of the present invention.

[0019] Figure 3 This is a schematic diagram of installing the descent buffer assembly of the present invention.

[0020] Figure 4 It is a schematic diagram of the structure of the descent buffer assembly of the present invention.

[0021] Figure 5 It is a schematic diagram of the structure of the telescopic support assembly of the present invention.

[0022] Figure 6 It is a schematic diagram of the water filter structure of the present invention.

[0023] Figure 7 It is a schematic diagram of the interior of the water filtration component of the present invention.

[0024] Figure 8 It is a schematic diagram of the structure of the stacking assembly of the present invention.

[0025] Fig. 9 It is a schematic diagram of the structure of the splicing assembly of the present invention.

[0026] Fig.10 It is a schematic diagram of the splicing use of the present invention.

[0027] The accompanying drawings are marked as follows: 1. bracket assembly; 101. top crossbeam; 102. main column; 1021. column core; 1022. column outer wall; 1023. slow flow port; 103. bracket base; 104. falling object slide rail; 2. hydraulic support assembly; 201. upper push block; 202. piston column; 2021. one-way valve; 203. hydraulic flow chamber; 2031. liquid inlet; 2032. liquid outlet; 204. push chamber; 205. liquid buffer chamber; 2051. lower circulation port; 2052. lower circulation pipeline; 206. hydraulic pump; 3. descending buffer assembly; 301. blocking ratchet; 302. limit swing arm; 303. buffer spring; 304. positioning contact; 4. extension Retractable support assembly; 401, auxiliary support; 402, driven gear; 403, horizontal saw blade; 404, supporting rocker; 405, moving center axis; 406, bottom rotating shaft; 407, supporting spring; 5, water filter assembly; 501, water filter outlet; 502, gathering funnel; 503, drainage channel; 504, water filter housing; 6, stacking assembly; 601, blanking connection plate; 602, blanking spring; 603, discharge flap; 604, reset spring; 605, blanking support plate; 7, splicing assembly; 701, splicing housing; 702, splicing center column; 703, limit slider; 704, locking round block; 705, locking bolt block; 706, telescopic spring; 707, unlocking spring; 708, spring baffle. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The support equipment for preventing roof falls in the dynamic pressure influence zone along the goaf of an underground mine involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] Reference Figure 1The present invention provides a support device for preventing roof falls in the dynamic pressure influence zone of the gob-side tunnel retaining in an underground mine, comprising a support assembly 1, a splicing assembly 7 is installed at the front end of the support assembly 1, a hydraulic support assembly 2 is installed at the rear end of the support assembly 1, a telescopic support assembly 4 is installed below the support assembly 1, a water filter assembly 5 is installed at the rear side of the hydraulic support assembly 2, and a stockpiling assembly 6 is installed at the rear side of the water filter assembly 5;

[0030] In this embodiment, it is necessary to specifically explain that: the support assembly 1 contacts the top of the tunnel to resist falling, the position of the splicing assembly 7 is close to the central axis of the tunnel, the splicing assembly 7 can make the device spliced ​​and combined with the opposite device, the hydraulic support assembly 2 uses the buffering effect of the hydraulic pressure to alleviate the impact force when the top falls, the telescopic support assembly 4 plays the role of auxiliary support, and when the impact force of the top falling presses the device and causes the device to tend to collapse, the telescopic support assembly 4 can change the support height to resist the top collapse, the water filter assembly 5 can collect liquid water mixed with the top debris, and the stacking assembly 6 can make the debris fall to the rear of the device according to the weight, so as to facilitate collection and centralized transportation or use for tunnel construction.

[0031] The main difference between this embodiment and the prior art is that, in view of the characteristics of the dynamic pressure influence zone of the gob-side tunnel retaining, this embodiment receives and transfers the debris generated by periodic falling at the central axis of the tunnel while ensuring the support function, which is conducive to cleaning the fallen objects and establishing a stable zone of the tunnel, specifically, the water filter component 5 and the material stacking component 6;

[0032] The above structure is the main structure of this embodiment, which solves the problem that traditional supports lack dynamic protection when the roof collapses. Secondly, it also solves the problem that the fallen objects on the top of the dynamic pressure influence area need to be cleaned repeatedly and are not easy to be used in a centralized manner.

[0033] Reference Figure 2 The support assembly 1 includes a main column 102, the main column 102 includes a column core 1021 and a column outer wall 1022, a piston column 202 is installed on the upper end of the column core 1021, two one-way valves 2021 are provided on both sides of the upper end of the piston column 202, a hydraulic flow chamber 203 is installed on the outer side of the piston column 202, two liquid inlet ports 2031 are provided at the bottom end of the hydraulic flow chamber 203, a liquid outlet port 2032 is provided at the top end of the hydraulic flow chamber 203, and a piston column outer wall 1022 is provided. An upper push block 201 is installed at the upper end of the wall 1022, a pushing chamber 204 is opened between the upper push block 201 and the hydraulic flow chamber 203, a slow flow port 1023 is installed at the lower end of the pushing chamber 204, a liquid buffer chamber 205 is opened below the hydraulic flow chamber 203, a lower circulation port 2051 is opened at the bottom of the liquid buffer chamber 205, a lower circulation pipe 2052 is installed at the lower end of the lower circulation port 2051, and a hydraulic pump 206 is installed at the bottom end of the lower circulation pipe 2052.

[0034] In this embodiment, it is necessary to explain in detail that: liquid is stored inside the hydraulic pump 206, and the hydraulic pump 206 can make the internal liquid reach the position of the one-way valve 2021 along the channel inside the column core 1021. The one-way valve 2021 allows the liquid to flow only from the inside of the piston column 202 to the hydraulic flow chamber 203 without backflow. Therefore, the space between the piston column 202 and the hydraulic flow chamber 203 will be filled with liquid. When the top is subjected to downward pressure, the piston column 202 descends, so that the space between the piston column 202 and the hydraulic flow chamber 203 is compressed, and the liquid therein enters the liquid inlet 2031 under pressure. The liquid in the hydraulic flow chamber 203 is subjected to pressure and rises to the liquid outlet 2032. The liquid at the liquid outlet 2032 will push the top block 20 The upward impact force makes the upper push block 201 slide relative to the outer wall 1022 of the column, and the upper push block 201 contacts the top of the tunnel to relieve the top pressure. At the same time, the slow flow port 1023 prevents the liquid between the upper push block 201 and the one-way valve 2021 from losing quickly, and maintains the supporting effect of the upper push block 201. When the liquid between the piston column 202 and the hydraulic flow chamber 203 is filled again and the space returns to its initial size, the piston column 202 contacts the top of the tunnel, and the liquid between the upper push block 201 and the one-way valve 2021 flows into the liquid buffer chamber 205 from the slow flow port 1023. After being buffered in the liquid buffer chamber 205, the liquid flows into the lower circulation pipe 2052 through the lower circulation port 2051, and then flows into the hydraulic pump 206 from the lower circulation pipe 2052 for recycling.

[0035] The hydraulic support assembly 2 achieves buffering by utilizing the incompressible property of liquid. The damping capacity of the liquid flow can slow down the movement speed of the upper end, thereby reducing the impact force from the top.

[0036] Reference Figure 3 and Figure 4 A descent buffer assembly 3 is installed on the outside of the column core 1021, and the descent buffer assembly 3 is connected to the inner wall of the main column 102. The descent buffer assembly 3 includes a blocking ratchet 301, a locking contact 304 is installed on the outside of the blocking ratchet 301, a limiting rotary arm 302 is installed on the upper end of the blocking ratchet 301, and a buffer spring 303 is installed inside the limiting rotary arm 302.

[0037] In this embodiment, it is necessary to specifically explain that: when the column core 1021 is subjected to pressure and is caused to descend, the limiting arm 302 drives the blocking ratchet 301 to rotate clockwise, and the locking contact 304 engages with the blocking ratchet 301 in the opposite direction of the ratchet teeth of the blocking ratchet 301. The locking contact 304 blocks the rotation of the blocking ratchet 301, and the two ends of the limiting arm 302 are straightened, and the length of the limiting arm 302 is longer than the distance between the column core 1021 and the column outer wall 1022. At the same time, the buffer spring 303 is stretched and tends to recover inward, thereby playing the effect of preventing the device from descending and buffering the impact force from above.

[0038] Reference Figure 5 The support assembly 1 includes a top crossbeam 101, a sub-support 401 is installed below the top crossbeam 101, a tooth groove is provided in the middle of the sub-support 401, a driven gear 402 is installed in the middle of the sub-support 401, the driven gear 402 is meshed with the tooth groove of the sub-support 401, a transverse saw blade 403 is installed above the driven gear 402, the transverse saw blade 403 is meshed with the driven gear 402, and the transverse saw blade 403 is away from the driven gear 402. A moving central axis 405 is installed at the end, and support rockers 404 are hinged above and below the moving central axis 405. The support rocker 404 above the moving central axis 405 is connected to the top crossbeam 101, and a bottom rotating shaft 406 is installed at the lower end of the other support rocker 404, and a bracket base 103 is installed below the bottom rotating shaft 406. A support spring 407 is installed at the upper end of the bottom rotating shaft 406, and the upper end of the support spring 407 is connected to the top crossbeam 101.

[0039] In this embodiment, it should be specifically explained that: when the top beam 101 is subjected to too much top falling pressure, the top beam 101 is pressed downward, causing the secondary support 401 to tend to decline, and the decline of the secondary support 401 will drive the driven gear 402 meshing with it to rotate clockwise, and the rotation of the driven gear 402 drives the transverse saw blade 403 to move right, thereby causing the transverse saw blade 403 to pull the moving center axis 405 to move right, and the rightward movement of the moving center axis 405 causes the support rocker 404 hinged thereto to rotate respectively, and the support rocker 404 generates support force on the upper and lower ends, and at the same time the support spring 407 is stretched, so that the collapse of the top beam 101 is supported.

[0040] Reference Figure 6 and Figure 7 A falling object slide rail 104 is installed at the front end of the top crossbeam 101, a water filter port 501 is installed at the rear end of the falling object slide rail 104, a gathering funnel 502 is installed at the lower end of the water filter port 501, a drainage channel 503 is installed at the lower end of the gathering funnel 502, the lower end of the drainage channel 503 is connected to the hydraulic pump 206, and a water filter housing 504 is installed outside the drainage channel 503.

[0041] In this embodiment, it is necessary to specifically explain that: the tunnel in the dynamic pressure influence zone is in an unstable stage. Under the influence of periodic stress, the axial position of the tunnel is far away from the tunnel wall and lacks support, so it is easier for small broken objects to fall off. When the top falling objects and the top rock water fall on the falling object slide 104 at the same time, the mixture will slide along the falling object slide 104 to the end of the falling object slide 104 close to the tunnel wall. When the mixed objects pass through the water filter outlet 501, the liquid water will flow into the water filter outlet 501 and enter the gathering funnel 502 for gathering, and then flow into the hydraulic pump 206 along the drainage channel 503 for collection, which is convenient for taking out or using the water for recycling inside the hydraulic support assembly 2.

[0042] Reference Figure 8 A blanking support plate 605 is installed at the rear end of the water filter housing 504, and a blanking connecting plate 601 is installed at the upper end of the blanking support plate 605. A sliding groove is opened on the blanking support plate 605, so that the blanking connecting plate 601 can slide up and down on the surface of the blanking support plate 605. The position of the blanking connecting plate 601 is lower than the water filter outlet 501, and a blanking spring 602 is installed below the blanking connecting plate 601. A discharge flap 603 is installed at the end of the blanking connecting plate 601 away from the water filter component 5, and a return spring 604 is installed below the discharge flap 603, and the other end of the return spring 604 is connected to the lower end of the blanking connecting plate 601.

[0043] In this embodiment, it should be specifically explained that: when the falling debris slides through the water filtration component 5 to the stacking component 6, it first falls on the material receiving plate 601. The weight of the object causes the material receiving plate 601 to be pressed down, and the material receiving spring 602 is compressed. Under the action of gravity and its own inertia, the object slides from the material receiving plate 601 to the discharging flap 603, and the discharging flap 603 is pressed down, the return spring 604 is compressed, and the object is thrown to the side close to the side of the lane. The heavy object will press the material receiving plate 601 to a lower height, and the object will fall to a position closer to the device, while the light object will fall to a position farther away from the device. Therefore, a distinction is made between the sizes of the falling objects, which is beneficial to the subsequent consolidation of the lane or the centralized transfer of these objects.

[0044] Reference Fig. 9 and Fig.10 The splicing component 7 includes a splicing shell 701 and a splicing center column 702. A limit slider 703 is installed on the periphery of the splicing center column 702. The limit slider 703 can slide left and right on the periphery of the splicing center column 702. A locking round block 704 is installed at the end of the splicing center column 702 away from the bracket component 1. The device located at the opposite position is also installed with a splicing component 7 at the front end of the bracket component 1. A telescopic spring 706 and a spring baffle 708 are installed inside the splicing shell 701. A locking bolt block 705 is installed on the inner side of the telescopic spring 706, and an unlocking spring 707 is installed on the side of the spring baffle 708 close to the bracket component 1.

[0045] In this embodiment, it is necessary to specifically explain that: when the opposite splicing shell 701 moves toward the splicing shell 701 at this end, the telescopic spring 706 drives the locking bolt block 705 to move toward the splicing shell 701 at this end, and the locking bolt block 705 contacts the locking circle 704 and slides on the surface of the locking circle 704. As the locking bolt block 705 continues to move forward, the locking bolt block 705 will reach the back of the locking circle 704 under the push of the telescopic spring 706 to form a locking position. At this time, the splicing shell 701 stops moving, and the two sections of the splicing assembly 7 are spliced ​​together, thereby strengthening the integrity of the support device and enhancing the stability of the tunnel.

[0046] When it is necessary to dismantle the splicing shell 701 on the opposite side, the splicing shell 701 is moved towards the splicing shell 701 on this end, driving the telescopic spring 706 to move forward, so that the locking bolt block 705 contacts the limit slider 703 and slides on the surface of the limit slider 703. As the locking bolt block 705 continues to move forward, the locking bolt block 705 will reach the other side of the limit slider 703, and the unlocking spring 707 is stretched. At this time, the opposite splicing shell 701 is released, and the unlocking spring 707 pulls the opposite splicing shell 701 back to the direction of the opposite device, and the locking bolt block 705 will pull the limit slider 703 to slide on the splicing middle column 702, so that the splicing middle column 702 contacts the locking round block 704, and then the locking bolt block 705 continues to move in the direction of the reciprocating stroke, and the locking bolt block 705 first slides on the surface of the limit slider 703, and then passes through the surface of the locking round block 704, so that the opposite splicing component 7 and the splicing component 7 on this end are separated.

[0047] Working principle of the present invention:

[0048] The main problem solved by this embodiment is that the device realizes buffering and restriction of longitudinal movement by providing a hydraulic support assembly 2 and a telescopic support assembly 4, using gears and hydraulic mechanisms, so that the risk of collapse of the device due to top fall is reduced, and the problem that the traditional support cannot alleviate the top impact force is solved;

[0049] Secondly, by providing a water filter component 5 and a material stacking component 6, the natural sliding of objects under the action of gravity and the difference in compression of springs when subjected to gravity of different magnitudes are utilized, so that the debris that falls when the tunnel is affected by dynamic pressure and the water generated when the tunnel is constructed can be collected and utilized in a centralized manner, thereby solving the problem that the fallen objects at the top of the dynamic pressure affected area need to be repeatedly cleaned and are difficult to be utilized in a centralized manner.

[0050] The specific steps are as follows: first, place the two opposite sets of the device symmetrically in the middle section of the dynamic pressure influence zone of the tunnel, so that the position of the splicing component 7 is close to the central axis of the tunnel, the position of the stacking component 6 is close to the tunnel walls on both sides of the tunnel, the top crossbeam 101 is close to the top, and the bracket base 103 is firmly in contact with the ground, then slide the splicing shell 701, the telescopic spring 706 will drive the locking bolt block 705 to move toward the opposite splicing shell 701, the locking bolt block 705 contacts the locking round block 704 and slides on the surface of the locking round block 704, as the locking bolt block 705 continues to move forward, the locking bolt block 705 will reach the back of the locking round block 704 under the push of the telescopic spring 706 to form a card position, at this time the splicing shell 701 stops moving, and the two sets of devices are spliced ​​through the splicing component 7;

[0051] When downward compressive stress occurs on the top direct top, the top crossbeam 101 and the top of the hydraulic support assembly 2 are first subjected to pressure. If the compressive stress is too large, the piston column 202 will drop. The drop of the piston column 202 will compress the space between the piston column 202 and the hydraulic flow chamber 203. The liquid in the space is pressed into the liquid inlet 2031 by the pressure. The liquid surges to the liquid outlet 2032 under the action of the pressure inside the hydraulic flow chamber 203. The liquid at the liquid outlet 2032 will give an upward impact force to the upper push block 201, causing the upper push block 201 to slide relative to the outer wall 1022 of the column. The upper push block 201 applies a supporting force to the top of the tunnel to relieve the pressure on the top of the tunnel. At the same time, the slow flow port 1023 slows down the loss of liquid between the upper push block 201 and the one-way valve 2021 to maintain the supporting effect of the upper push block 201.

[0052] When the impact force at the top is too large, causing the hydraulic support assembly 2 to continue to sink, the hydraulic support assembly 2 presses the column core 1021 to descend, and at this time the limit swing arm 302 drives the blocking ratchet 301 to rotate clockwise. Since the blocking contact 304 engages with the blocking ratchet 301 in the opposite direction of the ratchet teeth of the blocking ratchet 301, the blocking contact 304 blocks the rotation of the blocking ratchet 301, and the two ends of the limit swing arm 302 are straightened, and the length of the limit swing arm 302 is longer than the distance between the column core 1021 and the column outer wall 1022, the buffer spring 303 is stretched and has a tendency to recover inward, thereby preventing the column core 1021 from continuing to descend;

[0053] Since the top crossbeam 101 is pressed downward, the auxiliary support 401 tends to fall. The fall of the auxiliary support 401 will drive the driven gear 402 meshing with it to rotate clockwise. The rotation of the driven gear 402 drives the transverse saw blade 403 to move rightward, so that the transverse saw blade 403 pulls the moving middle shaft 405 to move rightward. The rightward movement of the moving middle shaft 405 causes the upper and lower support rockers 404 hinged thereto to rotate respectively. The support rockers 404 generate support forces on the upper and lower ends. At the same time, the support spring 407 is stretched, so that the top crossbeam 101 obtains additional support force.

[0054] The hydraulic pump 206 allows the internal liquid to reach the one-way valve 2021 along the channel inside the column core 1021, so that the liquid between the piston column 202 and the hydraulic flow chamber 203 is filled again, and the space between the piston column 202 and the hydraulic flow chamber 203 is restored to its original size. The piston column 202 contacts the top of the tunnel again, and the liquid between the upper push-up block 201 and the one-way valve 2021 flows from the slow flow port 1023 into the liquid buffer chamber 205. After being buffered inside the liquid buffer chamber 205, the liquid flows into the lower circulation pipe 2052 through the lower circulation port 2051, and flows from the lower circulation pipe 2052 into the hydraulic pump 206 for recycling;

[0055] When the tunnel is subjected to periodic disturbance of dynamic pressure, small pieces of broken objects and water will fall from the top of the tunnel at any time, and the mixture of these objects will fall above the falling object slide rail 104 and slide down under the action of gravity. When the mixed objects pass through the water filter port 501, the liquid water will flow into the water filter port 501, enter the gathering funnel 502 for gathering, and then flow into the hydraulic pump 206 along the drainage channel 503 for collection, so as to be conveniently taken out or recycled inside the hydraulic support assembly 2;

[0056] When the falling debris passes through the filter water inlet 501, it first falls on the material receiving plate 601. The weight of the object causes the material receiving plate 601 to be pressed down, and the material spring 602 is compressed. Under the action of gravity and its own inertia, the object slides from the material receiving plate 601 to the discharge flap 603. The discharge flap 603 is pressed down, and the return spring 604 is compressed. The object is thrown to the side close to the lane wall, and the heavy object will press the material receiving plate 601 to a lower height, and the object will fall to a position closer to the device, while the light object will fall to a position farther away from the device, and then it will be transferred together or used to build and consolidate the lane wall.

[0057] When the device needs to be dismantled, the splicing shell 701 is slid to make the locking bolt block 705 approach the limit slider 703 of the opposite device. Then, the locking bolt block 705 will gradually contact the limit slider 703 and slide on the surface of the limit slider 703. As the locking bolt block 705 continues to move forward, the locking bolt block 705 will reach the other side of the limit slider 703, and the unlocking spring 707 will be stretched. At this time, the opposite splicing shell 701 is released, and the unlocking spring 707 pulls the opposite splicing shell 701 back to the direction of the opposite device. The locking bolt block 705 will pull the limit slider 703 to slide on the splicing middle column 702, so that the splicing middle column 702 contacts the locking round block 704, and then the locking bolt block 705 continues to move in the direction of the round trip. The locking bolt block 705 first slides on the surface of the limit slider 703, and then passes through the surface of the locking round block 704, and the two sets of support devices are separated.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A support device for preventing roof falls in the dynamic pressure-affected zone of a gob-side entry in an underground mine, comprising a support assembly (1), characterized in that: A splicing assembly (7) is installed at the front end of the support assembly (1), a hydraulic support assembly (2) is installed at the rear end of the support assembly (1), a telescopic support assembly (4) is installed below the support assembly (1), a water filter assembly (5) is installed at the rear side of the hydraulic support assembly (2), and a stacking assembly (6) is installed at the rear side of the water filter assembly (5).

2. The support equipment for preventing roof falls in the dynamic pressure influence zone of gob-side entry retaining in underground mines according to claim 1, characterized in that: The support assembly (1) comprises a main column (102), the main column (102) comprising a column core (1021) and a column outer wall (1022), a piston column (202) is installed at the upper end of the column core (1021), two one-way valves (2021) are provided on both sides of the upper end of the piston column (202), a hydraulic flow chamber (203) is installed on the outer side of the piston column (202), two liquid inlets (2031) are provided at the bottom end of the hydraulic flow chamber (203), a liquid outlet (2032) is provided at the top end of the hydraulic flow chamber (203), an upper push-up block (201) is installed at the upper end of the column outer wall (1022), and a push chamber (204) is provided between the upper push-up block (201) and the hydraulic flow chamber (203).

3. The supporting equipment for preventing roof fall in the dynamic pressure influence zone of gob-side entry retaining in underground mines according to claim 2 is characterized in that: The lower end of the push chamber (204) is provided with a slow flow port (1023), a liquid buffer chamber (205) is provided below the hydraulic flow chamber (203), a lower circulation port (2051) is provided at the bottom of the liquid buffer chamber (205), a lower circulation pipe (2052) is provided at the lower end of the lower circulation port (2051), and a hydraulic pump (206) is provided at the bottom end of the lower circulation pipe (2052).

4. The support equipment for preventing roof falls in the dynamic pressure influence zone of gob-side entry retaining in underground mines according to claim 2, characterized in that: A descent buffer assembly (3) is installed on the outside of the column core (1021), and the descent buffer assembly (3) is connected to the inner wall of the main column (102). The descent buffer assembly (3) comprises a blocking ratchet (301), a locking contact (304) is installed on the outside of the blocking ratchet (301), a limiting rotary arm (302) is installed on the upper end of the blocking ratchet (301), and a buffer spring (303) is installed inside the limiting rotary arm (302).

5. The supporting equipment for preventing roof falls in the dynamic pressure-affected zone of gob-side entry retaining in underground mines according to claim 1, characterized in that: The support assembly (1) comprises a top crossbeam (101), a sub-support (401) is installed below the top crossbeam (101), a tooth groove is provided in the middle of the sub-support (401), a driven gear (402) is installed in the middle of the sub-support (401), the driven gear (402) is meshed with the tooth groove of the sub-support (401), a transverse saw blade (403) is installed above the driven gear (402), the transverse saw blade (403) is meshed with the driven gear (402), and the transverse saw blade (403) is away from the driven gear (402). A moving middle shaft (405) is installed at one end, and support rockers (404) are hinged above and below the moving middle shaft (405), and the support rocker (404) above the moving middle shaft (405) is connected to the top crossbeam (101), and a bottom rotating shaft (406) is installed at the lower end of the other support rocker (404), and a bracket base (103) is installed below the bottom rotating shaft (406), and a support spring (407) is installed at the upper end of the bottom rotating shaft (406), and the upper end of the support spring (407) is connected to the top crossbeam (101).

6. The supporting equipment for preventing roof falls in the dynamic pressure-affected zone of gob-side entry retaining in an underground mine according to claim 5, characterized in that: The front end of the top crossbeam (101) is equipped with a falling object slide rail (104), the rear end of the falling object slide rail (104) is equipped with a water filter port (501), the lower end of the water filter port (501) is equipped with a gathering funnel (502), the lower end of the gathering funnel (502) is equipped with a drainage channel (503), the lower end of the drainage channel (503) is connected to the hydraulic pump (206), and the outside of the drainage channel (503) is equipped with a water filter housing (504).

7. The supporting equipment for preventing roof fall in the dynamic pressure influence zone of gob-side entry retaining in underground mines according to claim 6, characterized in that: A material drop support plate (605) is installed at the rear end of the water filter housing (504), and a material drop connection plate (601) is installed at the upper end of the material drop support plate (605). A sliding groove is provided on the material drop support plate (605), and the material drop connection plate (601) can slide up and down on the surface of the material drop support plate (605). The position of the material drop connection plate (601) is lower than the water filter outlet (501), and a material drop spring (602) is installed below the material drop connection plate (601). A discharge flap (603) is installed at one end of the material drop connection plate (601) away from the water filter assembly (5), and a return spring (604) is installed below the discharge flap (603), and the other end of the return spring (604) is connected to the lower end of the material drop connection plate (601).

8. The support equipment for preventing roof fall in the dynamic pressure influence zone of gob-side entry retaining in underground mines according to claim 1, characterized in that: The splicing assembly (7) comprises a splicing shell (701) and a splicing center column (702); a limit slider (703) is installed on the periphery of the splicing center column (702); the limit slider (703) can slide left and right on the periphery of the splicing center column (702); a locking round block (704) is installed on the end of the splicing center column (702) away from the bracket assembly (1); the device located at the opposite position is also installed with a splicing assembly (7) at the front end of the bracket assembly (1); a telescopic spring (706) and a spring baffle (708) are installed inside the splicing shell (701); a locking bolt block (705) is installed on the inner side of the telescopic spring (706); and an unlocking spring (707) is installed on the side of the spring baffle (708) close to the bracket assembly (1).

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