Anti-impact device for underground reservoir coal pillar dam body

Abstract

The invention relates to an anti-impact device for an underground reservoir coal pillar dam body, which comprises a support frame and a buffer plate, the top of the support frame is used for propping against the top wall of a roadway, the bottom of the support frame is used for propping against the bottom wall of the roadway, and the side part of the support frame is used for propping against the coal pillar dam body positioned in the roadway; the buffer plate is located on the side, away from the coal pillar dam body, of the supporting frame and installed on the supporting frame, the buffer plate and the side portion of the supporting frame are arranged in a spaced mode, a plurality of flow channels are formed in the buffer plate, each flow channel is provided with a water inlet hole and a water outlet hole, and the water inlet holes and the water outlet holes are located in the side, away from the side portion of the supporting frame, of the buffer plate. The flow channel is constructed to enable the water flow pressure of the water outlet hole to be larger than the water flow pressure of the water inlet hole. According to the technical scheme, water waves cannot directly impact the coal pillar dam body and can be blocked by the buffer plate, in addition, water flow with large pressure flowing out of the water outlet holes can counteract water waves of underground water, the energy of the water waves can be consumed, and the impact acting force of the water waves on the coal pillar dam body is further reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of coal pillar dam reinforcement, and in particular to an anti-impact device for a coal pillar dam of an underground reservoir. Background Art

[0002] During the mining process, huge cavities are formed underground. In order to maintain the stability of the soil, some unmined areas are retained in the soil. The coal pillars in these areas extend from the bottom of the cavity to the top, thus supporting the soil.

[0003] In order to make full use of the goaf and groundwater generated during mining, dams are usually built between these coal pillars to form an underground reservoir to store and utilize groundwater during coal mining. However, due to factors such as water wave impact, cracks are prone to appear in the coal pillar dam. Summary of the invention

[0004] The purpose of the present disclosure is to provide an anti-impact device for a coal pillar dam of an underground reservoir to solve the technical problems existing in the related art.

[0005] In order to achieve the above-mentioned object, the present disclosure provides an anti-impact device for a coal pillar dam of an underground reservoir, comprising: A support frame, wherein the top of the support frame is used to abut against the top wall of the tunnel, the bottom of the support frame is used to abut against the bottom wall of the tunnel, and the side of the support frame is used to abut against the coal pillar dam located in the tunnel; A buffer plate is located on a side of the support frame away from the coal pillar dam body and is installed on the support frame. The buffer plate is spaced apart from the side of the support frame. The buffer plate has a plurality of flow channels inside. Each of the flow channels has a water inlet and a water outlet. The water inlet and the water outlet are both located on a side of the buffer plate away from the support frame. The flow channel is constructed so that the water flow pressure of the water outlet is greater than the water flow pressure of the water inlet.

[0006] Optionally, each of the flow channels has at least two water outlet holes, and the water inlet hole is located between the at least two water outlet holes.

[0007] Optionally, the flow channel includes a first boosting section, a connecting section and a second boosting section, the first boosting section is connected between the water inlet and the first end of the connecting section, the second boosting section is connected between the second end of the connecting section and the water outlet, and the flow area of ​​the first boosting section gradually decreases along the direction from the water inlet to the connecting section, and the flow area of ​​the second boosting section gradually decreases along the direction from the connecting section to the water outlet.

[0008] Optionally, the buffer plate includes a plate body and a plurality of buffer strips. An installation groove is formed on the plate body, and the plurality of buffer strips are all installed in the installation groove. A plurality of flow channel grooves are formed on two opposite side walls of each buffer strip, and the flow channel grooves on one buffer strip of every two adjacent buffer strips are combined with the flow channel grooves on the other buffer strip to form the flow channel.

[0009] Optionally, the shockproof device includes a first mounting shaft, a second mounting shaft, and two mounting brackets. The first mounting shaft is mounted at the bottom of the support frame, the second mounting shaft is mounted at the side of the support frame, the bottom of the buffer plate is rotatably connected to the first mounting shaft, the two mounting brackets are arranged at intervals along the axial direction of the second mounting shaft, the first end of each mounting bracket is hinged to the buffer plate, and the second end of each mounting bracket is hinged to the second mounting shaft.

[0010] Optionally, the second mounting shaft includes a fixed sleeve and two moving rods. The fixed sleeve is mounted on the side of the support frame, the first end of each moving rod is movably inserted into the fixed sleeve, the second end of each moving rod is hinged to the second end of the corresponding mounting bracket, and the two mounting brackets are in an "eight" shape, so that the two mounting brackets can drive the two moving rods to move away from the fixed sleeve when the buffer plate rotates towards the direction close to the support frame; A spring is sleeved on each moving rod. One end of the spring is connected to the first end of the moving rod, and the second end of the spring is connected to the inner wall of the fixed sleeve.

[0011] Optionally, the shockproof device further includes two air bags, and the two air bags are mounted on the support frame and located on both sides of the buffer plate; A baffle is arranged on each moving rod, and the baffle can abut against the air bag during the process of the moving rod moving away from the fixed sleeve.

[0012] Optionally, a plurality of receiving grooves and a plurality of telescopic support components are formed on the side of the support frame. Each telescopic support component is mounted in the receiving groove and can be received in the receiving groove. The telescopic support component includes a rotating shaft, a telescopic rod, and a connecting seat. The rotating shaft is rotatably mounted on the groove wall of the receiving groove, one end of the telescopic rod is connected to the rotating shaft, and the other end of the telescopic rod is connected to the connecting seat. The connecting seat is used for connecting with the coal pillar dam body.

[0013] Optionally, the support frame has a accommodating space for accommodating an expansion filling medium, and a delivery pipe is also embedded in the support frame, the inlet of the delivery pipe is connected to the accommodating space, and the outlet of the delivery pipe is located on the side of the support frame, so that the delivery pipe can deliver the expansion filling medium to the gap between the side of the support frame and the coal pillar dam.

[0014] Optionally, the support frame includes a first support frame and a second support frame, the first support frame includes a top plate and a first vertical plate, the top plate and the first vertical plate form an L shape, the second support frame includes a bottom plate and a second vertical plate, the bottom plate and the second vertical plate form an L shape, the top plate is used to abut against the top wall of the tunnel, the bottom plate is used to abut against the bottom wall of the tunnel, the first vertical plate and the second vertical plate are stacked on each other, and the first vertical plate or the second vertical plate is used to abut against the coal pillar dam; The first vertical plate is formed with a plurality of first through holes spaced apart in the up-down direction, the second vertical plate is formed with a plurality of second through holes spaced apart in the up-down direction, and a locking pin can pass through any of the first through holes and any of the second through holes to lock the first vertical plate to the second vertical plate.

[0015] Through the above technical scheme, since the top, bottom and sides of the support frame of the anti-impact device are used to respectively support the top wall, bottom wall and coal pillar dam of the coal mine tunnel, the support frame can support and reinforce the coal pillar dam, effectively improving the structural strength and stability of the underground reservoir formed by the coal pillar dam, avoiding the coal pillar dam from being broken due to the influence of rock fracture as much as possible, and extending the service life of the coal pillar dam.

[0016] In addition, since a buffer plate is arranged at intervals on the side of the support frame away from the coal pillar dam body, during use, even if the groundwater stored in the underground reservoir is affected by natural activities (such as crustal movement) and / or coal mining factors, causing fluctuations in the groundwater in the underground reservoir, the groundwater waves will not directly impact the coal pillar dam body, but will be blocked by the buffer plate, so that the coal pillar dam body is less impacted and is less likely to produce cracks or breaks.

[0017] Furthermore, since a plurality of flow channels are arranged on the buffer plate, and the flow channels are constructed so as to make the water flow pressure of the water outlet holes greater than the water flow pressure of the water inlet holes, when the groundwater flow hits the buffer plate, the water flow can flow out of the buffer plate from the water inlet holes and flow out from the water outlet holes with a greater pressure. The water flow with a greater pressure flowing out of the water outlet holes can offset the water waves of the groundwater. In this way, the energy of the water waves can be consumed, and the impact force of the water waves on the coal pillar dam body can be further reduced.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. Brief Description of the Drawings

[0019] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings: Figure 1 is a schematic perspective view of an impact prevention device for a coal pillar dam of an underground reservoir provided by an exemplary embodiment of the present disclosure.

[0020] Figure 2 is a schematic rear view of an impact prevention device for a coal pillar dam of an underground reservoir provided by an exemplary embodiment of the present disclosure.

[0021] Figure 3 is a schematic top view of an impact prevention device for a coal pillar dam of an underground reservoir provided by an exemplary embodiment of the present disclosure.

[0022] Figure 4 is a schematic rear view of an impact prevention device for a coal pillar dam of an underground reservoir provided by an exemplary embodiment of the present disclosure, in which a telescopic support assembly and a delivery pipe are also shown.

[0023] Figure 5 is a schematic view of a second mounting shaft after partial sectioning provided by an exemplary embodiment of the present disclosure.

[0024] Figure 6 is a schematic perspective view of a buffer strip provided by an exemplary embodiment of the present disclosure.

[0025] Figure 7 is Figure 6 an enlarged view of part A in

[0026] Description of Reference Numerals 100 - Impact prevention device; 1 - Support frame; 11 - Mounting lug; 12 - Accommodating groove; 13 - Telescopic support assembly; 131 - Rotating shaft; 132 - Telescopic rod; 133 - Connecting seat; 14 - Delivery pipe; 15 - First support frame; 151 - Top plate; 152 - First vertical plate; 153 - First through hole; 16 - Second support frame; 161 - Bottom plate; 162 - Second vertical plate; 163 - Second through hole; 17 - Claw; 18 - Card slot; 2 - Buffer plate; 21 - Flow channel; 22 - Water inlet hole; 23 - Water outlet hole; 24 - First pressurizing section; 25 - Connecting section; 26 - Second pressurizing section; 27 - Plate body; 28 - Buffer strip; 281 - Flow channel groove; 3 - First mounting shaft; 4 - Second mounting shaft; 41 - Fixed sleeve; 411 - Limiting projection; 42 - Moving rod; 421 - Limiting flange; 422 - Baffle; 43 - Spring; 44 - Friction sleeve; 5 - Mounting bracket; 6 - Airbag. Detailed Description of the Invention

[0027] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0028] In the present disclosure, it is necessary to understand that the directional words used, such as "upper" and "lower", etc., are defined by the drawing directions of the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. For example, the up and down directions may be the up and down directions of the exhaust steam heat recovery device. The terms "inside and outside" refer to the inside and outside of the corresponding structural contours. In addition, it should be noted that the terms used, such as "first", "second", etc., are used to distinguish one element from another, and do not have order and importance. In addition, in the description of the reference drawings, the same marks in different drawings represent the same elements.

[0029] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0030] like Figures 1 to 7 As shown, the present disclosure provides an anti-impact device 100 for a coal pillar dam of an underground reservoir, comprising a support frame 1 and a buffer plate 2, wherein the top of the support frame 1 is used to abut against the top wall of the tunnel, the bottom of the support frame 1 is used to abut against the bottom wall of the tunnel, the side of the support frame 1 is used to abut against the coal pillar dam located in the tunnel, the buffer plate 2 is located on the side of the support frame 1 away from the coal pillar dam and is installed on the support frame 1, the buffer plate 2 is spaced apart from the side of the support frame 1, the buffer plate 2 has a plurality of flow channels 21 inside, each flow channel 21 has a water inlet 22 and a water outlet 23, the water inlet 22 and the water outlet 23 are both located on the side of the buffer plate 2 away from the support frame 1, and the flow channel 21 is constructed so that the water flow pressure of the water outlet 23 is greater than the water flow pressure of the water inlet 22.

[0031] Through the above technical scheme, since the top, bottom and side of the support frame 1 of the anti-impact device 100 are respectively used to abut against the top wall, bottom wall and coal pillar dam of the coal mine tunnel, the support frame 1 can support and reinforce the coal pillar dam, effectively improving the structural strength and stability of the underground reservoir formed by the coal pillar dam, avoiding the coal pillar dam from being broken due to the influence of rock fracture as much as possible, and extending the service life of the coal pillar dam.

[0032] In addition, since a buffer plate 2 is also arranged at intervals on the side of the support frame 1 away from the coal pillar dam body, during use, even if the groundwater stored in the underground reservoir fluctuates due to natural activities (such as crustal movements) and / or coal mining factors, the water waves of the groundwater will not directly impact the coal pillar dam body, but will be blocked by the buffer plate 2, so that the impact on the coal pillar dam body is small and cracks or fractures are not likely to occur.

[0033] Moreover, since a plurality of flow channels 21 are arranged on the buffer plate 2, and the flow channels 21 are configured such that the water flow pressure at the water outlet holes 23 is greater than the water flow pressure at the water inlet holes 22, when the water flow of the groundwater impacts the buffer plate 2, the water flow can flow out of the buffer plate 2 from the water inlet holes 22 and flow out from the water outlet holes 23 with a greater pressure. The water flow with a greater pressure flowing out from the water outlet holes 23 can cancel out the water waves of the groundwater. Thus, the energy of the water waves can be consumed, and the impact force of the water waves on the coal pillar dam body can be further reduced.

[0034] Here, it can be understood that in the shock-proof device 100 provided by the present disclosure, the support frame 1 itself can also block the water flow of the groundwater. Even if the groundwater fluctuates due to natural activities (such as crustal movements) and / or coal mining factors, the fluctuating water flow will not directly impact the coal pillar dam body, effectively avoiding the situation where the water flow directly scours the coal pillar dam body, resulting in cracks or even collapses in the sandstone layer of the coal pillar dam body.

[0035] It should be noted that the present disclosure does not limit the specific arrangement manner of the above-mentioned plurality of flow channels 21 on the buffer plate 2, as long as the flow channels 21 can cancel out the energy of the water waves of the groundwater. As an implementation manner of the present disclosure, as Figure 1 and Figure 3 shown, the above-mentioned plurality of flow channels 21 are arranged in an array on the buffer plate 2. In other words, the plurality of flow channels 21 are respectively arranged at intervals along the height direction and the width direction of the underground coal pillar dam body.

[0036] In this way, on the one hand, the plurality of flow channels 21 arranged at intervals along the width direction of the coal pillar dam body can all cancel out the water waves of the groundwater, and the force on the buffer plate 2 is relatively uniform, effectively avoiding the phenomenon that the buffer plate 2 is locally stressed greatly and prone to stress concentration.

[0037] On the other hand, the plurality of flow channels 21 arranged at intervals along the height direction of the coal pillar dam body can also cancel out the water waves of the groundwater. Thus, even if the water level of the groundwater changes, for example, when the water level of the groundwater is relatively low, the flow channels 21 arranged at the lower part of the buffer plate 2 can still cancel out the water waves to a certain extent, and the practicability and versatility of the buffer plate 2 are relatively high.

[0038] It should be noted that the present disclosure does not limit the specific structure of the above-mentioned flow channel 21. For example, the above-mentioned flow channel 21 may have a water inlet hole 22 and a water outlet hole 23, or the above-mentioned flow channel 21 may also have a plurality of water inlet holes 22 and a plurality of water outlet holes 23 at the same time, as long as the above-mentioned flow channel 21 can consume part of the energy of the water wave. As an implementation manner of the present disclosure, as Figure 1 , Figure 3 , Figure 6 and Figure 7 shown, each of the above-mentioned flow channels 21 has at least two water outlet holes 23, and the water inlet hole 22 is located between at least two water outlet holes 23. In this way, the water flow flowing in through the water inlet hole 22 can flow out from the water outlet holes 23 at multiple different positions with a relatively large pressure, and the water flows flowing out from the two water outlet holes 23 can simultaneously counteract the water waves of the groundwater, which is beneficial to improving the effect of the flow channel 21 on reducing the impact force on the coal pillar dam.

[0039] Here, it should be noted that the present disclosure does not limit the specific positional relationship between the above-mentioned plurality of water outlet holes 23 and the water inlet hole 22, as long as the water flow flowing in through the water inlet hole 22 can flow out from the plurality of water outlet holes 23 at the same time. For example, as Figure 1 , Figure 3 , Figure 6 and Figure 7 shown, the above-mentioned plurality of water outlet holes 23 may be arranged at intervals in the vertical direction, that is, they may be arranged at intervals along the length direction of the buffer plate 2, or the above-mentioned plurality of water outlet holes 23 may also be arranged at intervals in the horizontal direction, that is, they may also be arranged at intervals along the width direction of the buffer plate 2. The present disclosure does not limit this.

[0040] It should be noted that the present disclosure does not limit the specific structure of the above-mentioned flow channel 21. As an implementation manner of the present disclosure, as Figure 7 shown, the above-mentioned flow channel 21 may include a first pressure increasing section 24, a connecting section 25 and a second pressure increasing section 26. The first pressure increasing section 24 is connected between the water inlet hole 22 and the first end of the connecting section 25, and the second pressure increasing section 26 is connected between the second end of the connecting section 25 and the water outlet hole 23. Along the direction from the water inlet hole 22 to the connecting section 25, the flow-through area of the first pressure increasing section 24 gradually decreases, and along the direction from the connecting section 25 to the water outlet hole 23, the flow-through area of the second pressure increasing section 26 gradually decreases. In other words, along the direction of the water flow from the water inlet hole 22 to the water outlet hole 23, the flow-through areas of the first pressure increasing section 24 and the second pressure increasing section 26 both gradually decrease. The first pressure increasing section 24 and the second pressure increasing section 26 with gradually decreasing flow-through areas can both play the role of a speed increasing cavity, and the water flow flowing in through the water inlet hole 22 can be pressurized twice successively, so that the pressure of the water flow flowing out through the water outlet hole 23 is greater than the water pressure of the water inlet hole 22 and can counteract the water waves of the groundwater.

[0041] In addition, the flow area of ​​the water inlet 22 is larger than that of the water outlet 23 , which enables groundwater to easily flow from the water inlet 22 into the flow channel 21 , thereby preventing groundwater from flowing from the water outlet 23 into the flow channel 21 .

[0042] Here, it can be understood that, for the embodiment in which the flow channel 21 includes a plurality of water outlet holes 23, the flow channel 21 can have a plurality of connecting sections 25 and a plurality of second pressurizing sections 26, one end of each of the plurality of connecting sections 25 is connected to the first pressurizing section 24, and the other ends of the plurality of connecting sections 25 are respectively connected to the corresponding second pressurizing sections 26. In this way, the water flowing in through the water inlet hole 22 can flow out through the first pressurizing section 24, the plurality of connecting sections 25 and the plurality of second pressurizing sections 26.

[0043] In the present disclosure, the buffer plate 2 can have any appropriate structure. For example, the buffer plate 2 can be constructed as an integral plate-like structure, on which the above-mentioned flow channel 21 is integrally formed. Alternatively, the buffer plate 2 can also be formed by splicing multiple parts, and the above-mentioned flow channel 21 is formed in the process of splicing. The present disclosure does not limit how to specifically form the flow channel 21.

[0044] As an embodiment of the present disclosure, Figure 1 , Figure 3 , Figure 6 as well as Figure 7 As shown, the above-mentioned buffer plate 2 may include a plate body 27 and a plurality of buffer strips 28, a mounting groove is formed on the plate body 27, and the plurality of buffer strips 28 are installed in the mounting groove, and a plurality of flow channel grooves 281 are formed on the two opposite side walls of each buffer strip 28, and the flow channel groove 281 on one buffer strip 28 of each two adjacent buffer strips 28 is combined with the flow channel groove 281 on the other buffer strip 28 to form a flow channel 21.

[0045] In this way, on the one hand, the processing difficulty of the buffer plate 2 can be reduced. There is no need to process the flow channel 21 inside the buffer plate 2 by drilling or the like. The flow channel 21 can be constructed by simply splicing a plurality of buffer strips 28 together. This is beneficial to reducing the manufacturing difficulty of setting the flow channel 21 in the buffer plate 2, and is also beneficial to reducing the manufacturing cost of the buffer plate 2.

[0046] On the other hand, if part of the flow channel 21 in the buffer plate 2 is blocked or damaged during use, it is only necessary to replace the two buffer strips 28 corresponding to the flow channel 21 without replacing the entire buffer plate 2, or the corresponding two buffer strips 28 can be removed for cleaning, which is also beneficial to reduce the use cost of the buffer plate 2.

[0047] In order to further reduce the impact of groundwater waves on the coal pillar dam, it is optional to Figure 1As shown, the above shock-proof device 100 further includes a first mounting shaft 3, a second mounting shaft 4 and two mounting brackets 5. The first mounting shaft 3 is mounted at the bottom of the support frame 1, the second mounting shaft 4 is mounted at the side of the support frame 1, and the bottom of the buffer plate 2 is rotatably connected to the first mounting shaft 3. The two mounting brackets 5 are arranged at intervals along the axial direction of the second mounting shaft 4. The first end of each mounting bracket 5 is hinged to the buffer plate 2, and the second end of each mounting bracket 5 is hinged to the second mounting shaft 4.

[0048] Since the bottom of the buffer plate 2 is rotatably connected to the first mounting shaft 3, and the first end of each mounting bracket 5 is hinged to the buffer plate 2, and the second end of each mounting bracket 5 is hinged to the second mounting shaft 4, the buffer plate 2 can deflect towards or away from the support frame 1. In this way, during use, if the buffer plate 2 is impacted by the water flow of groundwater, the buffer plate 2 can also move towards the side close to the support frame 1. During the process of the water flow pushing the buffer plate 2 to move, part of the impact force of the water flow will be converted into the force for pushing the buffer plate 2 to move, and the movable buffer plate 2 can also consume the energy of the water flow during its movement, thereby further reducing the impact force of the water wave on the coal pillar dam body.

[0049] Here, it should be noted that the present disclosure does not limit the specific connection manner between the buffer plate 2 and the first mounting shaft 3 and between the first mounting shaft 3 and the support frame 1. As an implementation manner of the present disclosure, the bottom of the above support frame 1 is provided with a mounting lug 11. An installation through hole is formed on one side of the buffer plate 2 close to the first mounting shaft 3. The first mounting shaft 3 can pass through the installation through hole and be inserted into the mounting lug 11, so as to rotatably mount the buffer plate 2 on the support frame 1.

[0050] It should be noted that the present disclosure does not limit the fixing manner of the above first mounting shaft 3 on the mounting lug 11. As an implementation manner of the present disclosure, the above shock-proof device 100 further includes a first bolt. External threads are formed on the first mounting shaft 3. The first bolt is used for thread connection with the first mounting shaft 3. In other words, the first mounting shaft 3 is fixed on the mounting lug 11 by the first bolt. The fixing of the buffer plate 2 on the support frame 1 is relatively reliable and is convenient for disassembly and assembly.

[0051] Optionally, as Figure 5As shown in the figure, the second mounting shaft 4 may include a fixed sleeve 41 and two moving rods 42. The fixed sleeve 41 is mounted on the side of the support frame 1. The first end of each moving rod 42 is movably inserted into the fixed sleeve 41, and the second end of each moving rod 42 is hinged to the second end of the corresponding mounting bracket 5. The two mounting brackets 5 are in an "eight" shape, so that when the buffer plate 2 rotates towards the direction close to the support frame 1, the two moving rods 42 can be driven to move away from the fixed sleeve 41. A spring 43 is sleeved on each moving rod 42. One end of the spring 43 is connected to the first end of the moving rod 42, and the second end of the spring 43 is connected to the inner wall of the fixed sleeve 41.

[0052] Since the mounting bracket 5 is used to drive the two moving rods 42 to move towards the fixed sleeve 41 when the buffer plate 2 rotates towards the direction close to the support frame 1, and springs 43 are sleeved on the two moving rods 42. In this way, if the buffer plate 2 is impacted by the water flow of groundwater, when the buffer plate 2 moves towards the direction close to the support frame 1, the two moving rods 42 will both compress the springs 43 under the action of the mounting bracket 5 and move away from the fixed sleeve 41. During this process, on the one hand, part of the impact force of the water flow of groundwater will be converted into the acting force to push the buffer plate 2 to move, thereby reducing the impact force of the water wave on the coal pillar dam body; on the other hand, the compressed spring 43 will also generate a reaction force on the moving rod 42, thereby generating a reaction force on the mounting bracket 5, the buffer plate 2 and the water flow of groundwater. Thus, during the compression process of the spring 43, the spring 43 can also consume the energy of the water wave, thereby being able to further reduce the impact force of the water wave on the coal pillar dam body.

[0053] To facilitate improving the service life of the second mounting shaft 4, optionally, as Figure 5 shown, the second mounting shaft 4 further includes a friction sleeve 44. The friction sleeve 44 is arranged on the inner wall of the fixed sleeve 41 and is used to rub against the moving rod 42. Thus, on the one hand, the friction sleeve 44 can increase the friction force when the moving rod 42 moves, thereby being able to further improve the consumption of the energy of the water wave, improve the buffering effect of the buffer plate 2 on the water wave, and further reduce the impact force of the water wave on the coal pillar dam body. On the other hand, the friction sleeve 44 can also prevent the moving rod 42 and the fixed sleeve 41 from rubbing against each other, resulting in the situation that the moving rod 42 and the fixed sleeve 41 are easily worn, effectively improving the service life of the second mounting shaft 4.

[0054] In the above-mentioned second mounting shaft 4, to prevent the moving rod 42 from slipping out of the fixed sleeve 41, optionally, as Figure 5As shown, a limiting flange 421 is provided at the first end of the above-mentioned moving rod 42, and a limiting protrusion 411 is provided on one side of the fixed sleeve 41 close to the second end of the moving rod 42. The limiting protrusion 411 can stop the limiting flange 421. In this way, when the moving rod 42 is pressed and moves away from the fixed sleeve 41, the limiting protrusion 411 and the limiting flange 421 cooperate with each other to jointly limit the moving rod 42. Thus, on the one hand, it can prevent the moving rod 42 from disengaging from the fixed sleeve 41, resulting in the buffer plate 2 falling off the support frame 1. On the other hand, it can also limit the buffer plate 2, effectively preventing the buffer plate 2 from moving towards the support frame 1 under the impact of water waves, and the buffer plate 2 directly hitting the support frame 1, resulting in excessive forces on the buffer plate 2, the support frame 1, and the coal pillar dam body, which are prone to damage.

[0055] In order to further reduce the impact force of water waves on the coal pillar dam body, optionally, as Figure 1 shown, the above-mentioned shock-proof device 100 further includes two air bags 6. The two air bags 6 are installed on the support frame 1 and are located on both sides of the buffer plate 2. A baffle 422 is provided on each moving rod 42. The baffle 422 can abut against the air bag 6 during the process of the moving rod 42 moving away from the fixed sleeve 41.

[0056] In this way, when the buffer plate 2 is impacted by water waves and moves towards the support frame 1, the baffle 422 provided on the moving rod 42 will squeeze the air bag 6 under the action of the buffer plate 2. The compressed air bag 6 will also generate a reaction force on the baffle 422, thereby generating a reaction force on the mounting bracket 5, the buffer plate 2, and the groundwater flow. In other words, during the compression process of the air bag 6, the air bag 6 can also consume the energy of the water waves, thereby further reducing the impact force of the water waves on the coal pillar dam body.

[0057] In addition, the two air bags 6 provided on both sides of the buffer plate 2 can also limit the buffer plate 2 left and right. Even if the buffer plate 2 moves due to the water waves of the groundwater, the buffer plate 2 will not shake left and right, thereby effectively preventing the buffer plate 2 from shaking, and the buffer plates 2 provided on adjacent two shock-proof devices 100 from colliding, resulting in damage to the buffer plate 2.

[0058] Here, it should be noted that the present disclosure does not limit the material of the above-mentioned baffle 422 either. In order to prevent the baffle 422 from scratching or even puncturing the air bag 6, optionally, the above-mentioned baffle 422 is made of rubber material. The rubber material baffle 422 is relatively soft and not easy to scratch the air bag 6.

[0059] Optionally, a pressure sensor may also be provided inside the airbag 6. The pressure sensor is used to detect the pressure condition of the airbag 6, so as to be able to reflect the impact condition of the water wave on the buffer plate 2. For example, when the pressure sensor detects a large pressure, the controller electrically connected to the pressure sensor can control the telescopic support assembly 13 mentioned below to extend, so as to improve the support effect of the shockproof device 100 on the coal pillar dam body.

[0060] To improve the fixing effect of the shockproof device 100 on the coal pillar dam body, optionally, as Figure 4 shown, a plurality of receiving grooves 12 and a plurality of telescopic support assemblies 13 are formed on the side of the support frame 1. Each telescopic support assembly 13 is installed in the receiving groove 12 and can be received in the receiving groove 12. The telescopic support assembly 13 includes a rotating shaft 131, a telescopic rod 132 and a connecting seat 133. The rotating shaft 131 is rotatably installed on the groove wall of the receiving groove 12. One end of the telescopic rod 132 is connected to the rotating shaft 131, and the other end of the telescopic rod 132 is connected to the connecting seat 133. The connecting seat 133 is used to connect with the coal pillar dam body.

[0061] The above-mentioned telescopic support assembly 13 can improve the fixing effect of the shockproof device 100 on the coal pillar dam body. For example, when the surface quality of the coal pillar dam body is good and the support frame 1 can be directly and closely attached to the surface of the coal pillar dam body, the above-mentioned plurality of telescopic support assemblies 13 can be received in the receiving grooves 12, and the support frame 1 can be directly attached to the surface of the coal pillar dam body for installation, so as to realize the installation of the shockproof device 100 on the coal pillar dam body.

[0062] When the surface of the coal pillar dam body is uneven, the support frame 1 cannot be well attached to the surface of the coal pillar dam body. The operator can extend the telescopic support assembly 13 from the receiving groove 12 and adjust the telescopic lengths of different telescopic support assemblies 13 so that the connecting seat 133 of each telescopic support assembly 13 can be connected to the coal pillar dam body. In this way, the installation of the shockproof device 100 on the coal pillar dam body can also be realized. The shockproof device 100 has good versatility and can be applied to coal pillar dam bodies under different conditions.

[0063] Here, it should be noted that in the shock-proof device 100 provided in the present disclosure, the telescopic support assembly 13 is not limited to the above-mentioned usage mode. For example, during normal use, the plurality of telescopic support assemblies 13 can be accommodated in the accommodation groove 12, and the support frame 1 is directly installed by fitting to the surface of the coal pillar dam. When the water wave action received by the shock-proof device 100 is too large, the driving member connected to the rotating shaft 131 can be controlled by the controller, so that the driving member drives the rotating shaft 131 to rotate, the telescopic rod 132 extends out of the accommodation groove 12, and the length of the telescopic rod 132 is adjusted by the controller, so that the connecting seat 133 of each telescopic support assembly 13 can be connected to the coal pillar dam, thereby improving the fixing effect of the shock-proof device 100 on the coal pillar dam to cope with the relatively large fluctuations of the groundwater.

[0064] Optionally, the support frame 1 may further have an accommodation space for accommodating an expansion filling medium. A delivery pipe 14 is also embedded in the support frame 1. The inlet of the delivery pipe 14 communicates with the accommodation space, and the outlet of the delivery pipe 14 is located on the side of the support frame 1, so that the delivery pipe 14 can deliver the expansion filling medium to the gap between the side of the support frame 1 and the coal pillar dam.

[0065] In this way, when the water wave action received by the shock-proof device 100 is too large, by controlling the delivery pipe 14, the expansion filling medium can flow into the gap between the side of the support frame 1 and the coal pillar dam, and the expansion filling medium can expand in this gap, thereby improving the support effect of the shock-proof device 100 on the coal pillar dam.

[0066] To improve the versatility of the shock-proof device 100, optionally, as Figures 1 to 4 shown, the support frame 1 includes a first support frame 15 and a second support frame 16. The first support frame 15 includes a top plate 151 and a first vertical plate 152, and the top plate 151 and the first vertical plate 152 form an L shape. The second support frame 16 includes a bottom plate 161 and a second vertical plate 162, and the bottom plate 161 and the second vertical plate 162 form an L shape. The top plate 151 is used to abut against the top wall of the roadway, the bottom plate 161 is used to abut against the bottom wall of the roadway, the first vertical plate 152 and the second vertical plate 162 are stacked on each other, and the first vertical plate 152 or the second vertical plate 162 is used to abut against the coal pillar dam. A plurality of first through holes 153 are formed on the first vertical plate 152 at intervals in the up and down direction, and a plurality of second through holes 163 are formed on the second vertical plate 162 at intervals in the up and down direction. The locking pin can pass through any one of the first through holes 153 and any one of the second through holes 163 to lock the first vertical plate 152 to the second vertical plate 162.

[0067] In this way, by adjusting the relative positions between the first vertical plate 152 and the second vertical plate 162, the top plate 151 and the bottom plate 161 of the support frame 1 can be respectively abutted against the top wall and the bottom wall of the roadway, so that the shockproof device 100 applying the support frame 1 can be used for coal pillar dams with different heights, and the shockproof device 100 has high versatility.

[0068] In addition, by sequentially inserting the locking pins into the first through hole 153 and the second through hole 163, the locking between the first vertical plate 152 and the second vertical plate 162 can be realized, and no relative displacement will occur between the first vertical plate 152 and the second vertical plate 162, which can meet the use requirements of the shockproof device 100.

[0069] To facilitate the connection of multiple adjacent shockproof devices 100, optionally, as Figures 1 to 4 shown, the above shockproof device 100 further includes a cooperating foot 17 and a slot 18, and the foot 17 and the slot 18 are respectively arranged on both sides of the support frame 1 in the width direction. In this way, by simply inserting the foot 17 of one shockproof device 100 into the slot 18 of the adjacent shockproof device 100, the connection between two adjacent shockproof devices 100 can be realized, and the connection between multiple shockproof devices 100 is relatively reliable and not prone to shaking due to the influence of water waves.

[0070] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0071] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0072] Furthermore, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. An anti-impact device for a coal pillar dam of an underground reservoir, characterized in that: include: A support frame, wherein the top of the support frame is used to abut against the top wall of the tunnel, the bottom of the support frame is used to abut against the bottom wall of the tunnel, and the side of the support frame is used to abut against the coal pillar dam located in the tunnel; A buffer plate is located on a side of the support frame away from the coal pillar dam body and is installed on the support frame. The buffer plate is spaced apart from the side of the support frame. The buffer plate has a plurality of flow channels inside. Each of the flow channels has a water inlet and a water outlet. The water inlet and the water outlet are both located on a side of the buffer plate away from the support frame. The flow channel is constructed so that the water flow pressure of the water outlet is greater than the water flow pressure of the water inlet.

2. The anti-shock device according to claim 1, characterized in that: Each of the flow channels has at least two water outlet holes, and the water inlet hole is located between the at least two water outlet holes.

3. The anti-shock device according to claim 1, characterized in that: The flow channel includes a first boosting section, a connecting section and a second boosting section, the first boosting section is connected between the water inlet and the first end of the connecting section, the second boosting section is connected between the second end of the connecting section and the water outlet, and the flow area of ​​the first boosting section gradually decreases along the direction from the water inlet to the connecting section, and the flow area of ​​the second boosting section gradually decreases along the direction from the connecting section to the water outlet.

4. The anti-shock device according to claim 1, characterized in that: The buffer plate includes a plate body and a plurality of buffer strips, the plate body is formed with an installation groove, the plurality of buffer strips are installed in the installation groove, and the two opposite side walls of each buffer strip are formed with a plurality of flow channel grooves, and the flow channel groove on one buffer strip of each two adjacent buffer strips is combined with the flow channel groove on the other buffer strip to form the flow channel.

5. The anti-shock device according to claim 1, characterized in that: The anti-impact device includes a first mounting shaft, a second mounting shaft and two mounting brackets, the first mounting shaft is installed at the bottom of the support frame, the second mounting shaft is installed at the side of the support frame, the bottom of the buffer plate is rotatably connected to the first mounting shaft, the two mounting brackets are arranged at intervals along the axial direction of the second mounting shaft, the first end of each mounting bracket is hinged to the buffer plate, and the second end of each mounting bracket is hinged to the second mounting shaft.

6. The impact protection device according to claim 5, characterized in that: The second mounting shaft comprises a fixed sleeve and two moving rods, the fixed sleeve is mounted on the side of the support frame, the first end of each moving rod is movably extended into the fixed sleeve, the second end of each moving rod is hinged to the second end of the corresponding mounting bracket, and the two mounting brackets are in an "eight" shape, so that the two mounting brackets can drive the two moving rods to move in a direction away from the fixed sleeve when the buffer plate rotates in a direction close to the support frame; A spring is sleeved on each of the moving rods, one end of the spring is connected to the first end of the moving rod, and the second end of the spring is connected to the inner wall of the fixed sleeve.

7. The impact protection device according to claim 6, characterized in that: The anti-impact device further comprises two air bags, which are mounted on the support frame and located on both sides of the buffer plate; Each of the moving rods is provided with a baffle, and the baffle can abut against the airbag when the moving rod moves in a direction away from the fixed sleeve.

8. The anti-shock device according to any one of claims 1 to 7, characterized in that: A plurality of receiving grooves and a plurality of telescopic support assemblies are formed on the side of the support frame, each of the telescopic support assemblies is installed in the receiving groove and can be accommodated in the receiving groove, the telescopic support assembly includes a rotating shaft, a telescopic rod and a connecting seat, the rotating shaft is rotatably installed on the groove wall of the receiving groove, one end of the telescopic rod is connected to the rotating shaft, and the other end of the telescopic rod is connected to the connecting seat, and the connecting seat is used to connect to the coal pillar dam body.

9. The anti-shock device according to any one of claims 1 to 7, characterized in that: The support frame has a storage space for accommodating an expansion filling medium, and a delivery pipe is embedded in the support frame. The inlet of the delivery pipe is connected to the storage space, and the outlet of the delivery pipe is located on the side of the support frame, so that the delivery pipe can transport the expansion filling medium to the gap between the side of the support frame and the coal pillar dam.

10. The anti-shock device according to any one of claims 1 to 7, characterized in that: The support frame includes a first support frame and a second support frame, the first support frame includes a top plate and a first vertical plate, the top plate and the first vertical plate form an L shape, the second support frame includes a bottom plate and a second vertical plate, the bottom plate and the second vertical plate form an L shape, the top plate is used to abut against the top wall of the tunnel, the bottom plate is used to abut against the bottom wall of the tunnel, the first vertical plate and the second vertical plate are stacked on each other, and the first vertical plate or the second vertical plate is used to abut against the coal pillar dam; The first vertical plate is formed with a plurality of first through holes spaced apart in the up-down direction, the second vertical plate is formed with a plurality of second through holes spaced apart in the up-down direction, and a locking pin can pass through any of the first through holes and any of the second through holes to lock the first vertical plate to the second vertical plate.

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