Coal mine roof reinforcing structure

Abstract

The invention discloses a coal mine roof reinforcing structure and belongs to the field of coal mine reinforcing. Comprising a box body, two supporting plates and two arc-shaped plates, placing grooves are formed in the upper ends of the supporting plates, clamping blocks are installed at the lower ends of the arc-shaped plates, hinge blocks are installed at the ends, close to each other, of the two arc-shaped plates, cavities are formed in the arc-shaped plates, and the interiors of the cavities are used for being filled with quick-hardening water stop cement; according to the device, the cavity can be filled with quick-hardening water-stopping cement through the arranged arc-shaped plate, when the arc-shaped plate is impacted and cracks occur, the quick-hardening water-stopping cement can be discharged out of the cracks in time and makes contact with water in a coal mine, the cracks are filled after hardening, and in addition, the service life of the quick-hardening water-stopping cement is prolonged. Under the action of air pressure in the corrugated pipe, part of the quick-hardening water-stopping cement can permeate into surrounding coal mines or soil, and the coal mines or the soil can be reinforced after the quick-hardening water-stopping cement is hardened.

Description

Technical Field

[0001] This invention relates to the field of coal mine reinforcement, and more specifically, to a coal mine roof reinforcement structure. Background Technology

[0002] Hydraulic fracturing technology refers to the use of high-pressure pumps to inject high-pressure fluid (usually water, plus proppant and some chemical additives) into the target rock strata, causing cracks or widening existing cracks, thereby changing the physical properties of the rock strata. During this process, reinforcement equipment is used to support the top of the mine to prevent collapse. This can prevent high-pressure water or other fluids from backflowing into the working face or other areas, causing casualties, equipment damage or other safety accidents.

[0003] Traditional roof anti-backlash reinforcement structures are prone to cracking and damage when subjected to impacts from coal mines or rocks, resulting in reduced support effectiveness. They cannot be repaired in time during use to compensate for the lost strength and ensure safety during construction. Summary of the Invention

[0004] In view of the problem that existing technologies cannot be repaired in a timely manner during use, the purpose of this invention is to provide a coal mine roof reinforcement structure.

[0005] To solve the above problems, the present invention adopts the following technical solution: A coal mine roof reinforcement structure includes: Two support plates and two arc-shaped plates are provided. Each support plate has a placement groove at its upper end. A locking block is slidably installed at the lower end of the arc-shaped plate near the support plate. The size of the placement groove is larger than the size of the locking block. Two curved plates are fixedly installed with hinge blocks at their close ends. Each hinge block has a through hole in its center, and a rod is inserted into the hole. The arc-shaped plate has a cavity inside, the inner wall of which is coated with a waterproof layer and is used to fill the cavity with quick-hardening waterproof cement. There is a gap between the locking block and the arc-shaped plate, and multiple corrugated pipes and buffer springs are installed inside the gap between the locking block and the arc-shaped plate. The end of the corrugated pipe near the cavity extends through the arc-shaped plate into the cavity. Multiple first anchor rods are installed through the upper side of the arc-shaped plate. The first anchor rods have a water storage cavity inside and a filter mesh structure on the upper side of the first anchor rod. The buffer springs compress the arc-shaped plate.

[0006] Optionally, a water inlet groove is provided on the inner wall of the cavity near the first anchor rod. The end of the water inlet groove away from the cavity is connected to the interior of the water storage cavity. A first sealing component is provided at the end of the water inlet groove near the cavity. The first sealing component is used to seal the water inlet groove.

[0007] Optionally, the first sealing assembly includes a first sealing gasket, the size of which is larger than the size of the water inlet tank. A plurality of first guide rods are fixedly installed on one end of the first sealing gasket near the water inlet tank. A guide groove is provided on the arc plate at the position corresponding to the first guide rod. The first guide rod is slidably connected to the guide groove, and a tension spring is fixedly installed on the end of the first guide rod. The end of the tension spring away from the first guide rod is fixedly connected to the inner wall of the guide groove.

[0008] Optionally, a switch is fixedly installed on the inner wall of the guide groove away from the tension spring, an alarm is fixedly installed on the end of the support plate near the hinge block, and the end of the guide rod away from the tension spring is pressed into contact with the switch. The switch is used to control the alarm to work.

[0009] Optionally, the upper part of the first anchor bolt corresponding to the filter mesh is filled with multiple sponges, which are used to absorb moisture from the surrounding soil.

[0010] Optionally, the lower end of the first anchor rod is provided with a second sealing assembly, which is used to seal the lower end of the water storage chamber. The second sealing assembly includes a second sealing gasket, and a plurality of second guide rods are fixedly installed on the upper end of the second sealing gasket. The second guide rods pass through the protruding part of the end of the first anchor rod and are slidably connected to it. A compression spring is sleeved on the outer side of the middle part of the second guide rod. The upper end of the compression spring is fixedly connected to the second guide rod, and the lower end of the compression spring is fixedly connected to the first anchor rod.

[0011] Optionally, multiple second anchor rods are installed on both the arc-shaped plate and the support plate. The second anchor rods are inclined through the arc-shaped plate and the support plate and extend to the other side. The end of the second anchor rod near the hinge block is lower than the other end. The second anchor rods are all in the form of a filter mesh structure. A water guide groove is opened inside the second anchor rod, and the water guide groove is also filled with sponge.

[0012] Optionally, multiple contraction grooves are provided at the ends of the two arc-shaped plates that are close to each other. An extension block is slidably installed inside the contraction groove. A threaded rod is rotatably connected inside the contraction groove. The outer side of the threaded rod is threadedly connected to the extension block. A rubber wheel is fixedly connected to the inner side of the threaded rod. The outer wall of the rubber wheel is in frictional contact with the outer wall of the first anchor rod.

[0013] Optionally, protrusions are fixedly installed on the upper side of the two arc-shaped plates at their adjacent ends, with a gap between the two protrusions. The protrusions are used to prevent the lower side of the arc-shaped plates from rotating upward around the insert rod.

[0014] Compared with the prior art, the technical solution provided by this invention has at least the following beneficial effects: In the above scheme, the arc-shaped plate can fill the cavity with quick-hardening water-stop cement. When the arc-shaped plate is impacted and cracks appear, the quick-hardening water-stop cement can be discharged from the cracks in time, come into contact with the moisture in the coal mine, and fill the cracks after hardening. Furthermore, under the air pressure in the corrugated pipe, some of the quick-hardening water-stop cement can also penetrate into the surrounding coal mine or soil, which can reinforce the coal mine or soil after hardening, effectively ensuring safety during use. Through the arched bearing of the arc-shaped plate and the anchoring effect of the first anchor rod, it can resist the back pressure of hydraulic fracturing, avoiding dangerous situations such as roof collapse and fluid leakage caused by back pressure.

[0015] The locking blocks and support plates can disperse the impact force to the horizontal and vertical directions when recoil occurs. Combined with the buffer springs, this reduces the probability of damage to the curved plate and extends its lifespan.

[0016] The sponge can absorb the surrounding moisture and drain it through the water storage chamber, preventing excessive moisture accumulation in the coal mine from causing collapse. It can also store some water, and when cracks appear in the curved plate, the water in the storage chamber can be introduced into the cavity to come into contact with the quick-hardening water-stop cement, allowing it to harden more quickly and preventing insufficient moisture in the coal mine from reacting with the quick-hardening water-stop cement. Attached Figure Description

[0017] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the hinge block and insert rod of the present invention; Figure 3 This is a schematic diagram of the shrinkage groove structure of the present invention; Figure 4 This is a schematic diagram of the water inlet tank and cavity portion of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic diagram of the buffer spring portion of the present invention; Figure 7 This is a schematic diagram of the internal structure of the first anchor rod of the present invention; Figure 8 This is a schematic diagram of the second sealing gasket portion of the present invention; Figure 9This is a schematic diagram of the internal structure of the second anchor rod of the present invention.

[0019] [Figure Labels]

[0020] 1. Support plate; 101. Placement groove; 102. Alarm; 103. Second anchor bolt; 104. Water guide channel; 2. Curved plate; 201. Engaging block; 202. Hinge block; 203. Insertion hole; 204. Insert rod; 205. Cavity; 206. Waterproof layer; 207. Corrugated pipe; 208. Buffer spring; 209. Water inlet groove; 210. Guide groove; 211. Switch; 212. Contraction groove; 213. Extension block; 214. Threaded rod; 215. Rubber wheel; 216. Protrusion; 3. First anchor bolt; 301. Water storage cavity; 302. Sponge; 4. First sealing assembly; 401. First sealing gasket; 402. First guide rod; 403. Tension spring; 5. Second sealing assembly; 501. Second sealing gasket; 502. Second guide rod; 503. Compression spring.

[0021] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more comprehensive, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0023] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0024] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0025] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0026] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0027] like Figures 1 to 9 As shown, an embodiment of the present invention provides a coal mine roof reinforcement structure, comprising: Two support plates 1 and two arc-shaped plates 2. Each support plate 1 has a placement groove 101 at its upper end. The lower end of the arc-shaped plate 2, near the support plate 1, is slidably fitted with a locking block 201. The size of the placement groove 101 is larger than the size of the locking block 201. Two curved plates 2 are fixedly installed with hinge blocks 202 at their close ends. Each hinge block 202 has a through hole 203 in the middle, and a rod 204 is inserted into the hole 203. The curved plate 2 has a cavity 205 inside, and the inner wall of the cavity 205 is coated with a waterproof layer 206. The waterproof layer 206 can isolate external moisture from contact with the quick-hardening water-stop cement inside the cavity 205. The cavity 205 is used to fill the quick-hardening water-stop cement. There is a gap between the locking block 201 and the curved plate 2. Multiple corrugated pipes 207 and buffer springs 208 are provided in the gap between the locking block 201 and the curved plate 2. One end of the corrugated pipe 207 near the cavity 205 extends through the curved plate 2 into the cavity 205. Multiple first anchor rods 3 are provided through the upper side of the curved plate 2. The first anchor rod 3 has a water storage cavity 301 inside, and the upper side of the first anchor rod 3 has a filter mesh structure. The buffer springs 208 compress the curved plate 2 in the vertical direction.

[0028] Among them, the quick-hardening water-stopping cement can be sulfoaluminate type quick-hardening water-stopping cement.

[0029] In use, when excessive moisture inside the mine causes rocks to crumble and fall from the upper side, the arc-shaped plate 2 can block the falling rocks. When a rock hits the arc-shaped plate 2, the hinge blocks 202 on the two arc-shaped plates 2 can rotate around the insert rod 204. Furthermore, since the locking block 201 is located inside the placement groove 101, when the arc-shaped plate 2 is compressed, the lower sides of the two arc-shaped plates 2 can press against the locking block 201, causing the locking block 201 to press against the inner wall of the placement groove 101, thereby transmitting the pressure on the arc-shaped plate 2. When the support plate 1 is applied, since the arc plate 2 has an arc structure and the two arc plates 2 can rotate relative to each other, the arc plate 2 can be pressed by the locking block 201 to squeeze the placement groove 101 and convert the pressure into vertical pressure and horizontal pressure. The vertical pressure is transmitted to the ground by the support plate 1, and the horizontal pressure is transmitted to the mine side wall by the support plate 1, increasing the friction between the support plate 1 and the mine side wall and making the support plate 1 fit tightly against the mine side wall. When the curved plate 2 cracks due to prolonged use or strong impact, the waterproof layer 206 will crack, connecting the outside of the curved plate 2 with the inside of the cavity 205. The air in the corrugated pipe 207 will contract and enter the cavity 205 under the pressure of the locking block 201 and the curved plate 2, thereby squeezing the quick-hardening water-stop cement inside the cavity 205. This will cause the quick-hardening water-stop cement to be squeezed out of the crack to the outside of the curved plate 2, and come into contact with the moisture in the external soil or coal mine, thus hardening quickly. This can not only repair the crack, but also penetrate into the surrounding soil cracks during the diffusion process, and play a temporary reinforcement role after hardening.

[0030] The upper part of the first anchor rod 3, corresponding to the filter mesh, is filled with multiple sponges 302. The sponges 302 are used to absorb water from the surrounding soil. The lower end of the first anchor rod 3 is provided with a second sealing component 5, which is used to seal the lower end of the water storage cavity 301. The second sealing assembly 5 includes a second sealing gasket 501. A plurality of second guide rods 502 are fixedly installed on the upper end of the second sealing gasket 501. The second guide rods 502 pass through the protruding part of the end of the first anchor rod 3 and are slidably connected thereto, which is used to limit the movement direction of the second guide rods 502. A compression spring 503 is sleeved on the outer side of the middle part of the second guide rod 502. The upper end of the compression spring 503 is fixedly connected to the second guide rod 502, and the lower end of the compression spring 503 is fixedly connected to the first anchor rod 3.

[0031] By adopting the above technical solution, since the upper part of the first anchor rod 3 has a filter mesh structure, water from the external soil or coal mine can enter the water storage cavity 301 inside the first anchor rod 3. Furthermore, the sponge 302 can absorb the surrounding water, continuously drawing external water into the first anchor rod 3 using capillary action. Under gravity, the water gradually detaches from the sponge 302 and flows into the water storage cavity 301. As the water level in the water storage cavity 301 rises, the pressure on the second sealing gasket 501 also gradually increases. The second sealing gasket 501, under the pressure of the water in the water storage cavity 301, can... Rod 502 tends to move downwards and compresses spring 503 through the second guide rod 502, causing spring 503 to contract. When the second sealing gasket 501 descends to a certain position, it no longer obstructs the water storage cavity 301. At this time, the water in the water storage cavity 301 can flow out. When the water level in the water storage cavity 301 drops, spring 503 can compress the guide rod under its own elasticity, causing the guide rod to rise. After the guide rod rises, it can drive the second sealing gasket 501 to rise. After the second sealing gasket 501 rises, it can seal the water storage cavity 301 again. At this time, there is still water in the water storage cavity 301. Since the water storage cavity 301 always contains water, when the first sealing gasket 401 is not under pressure in the cavity 205, the water in the water storage cavity 301 can squeeze the first sealing gasket 401 through the water inlet groove 209, thereby causing the first sealing gasket 401 to move along the direction of the first guide rod 402. After the first sealing gasket 401 moves, it no longer blocks the water inlet groove 209. At this time, the water in the water storage cavity 301 can enter the cavity 205 through the water inlet groove 209 and come into contact with the quick-hardening water-stop cement, so that the quick-hardening water-stop cement can be fused with enough water and thus harden quickly.

[0032] A water inlet groove 209 is provided on the inner wall of the cavity 205 near the first anchor rod 3. The end of the water inlet groove 209 away from the cavity 205 is connected to the interior of the water storage cavity 301. A first sealing component 4 is provided at the end of the water inlet groove 209 near the cavity 205. The first sealing component 4 is used to seal the water inlet groove 209. The first sealing assembly 4 includes a first sealing gasket 401, the size of which is larger than that of the water inlet trough 209. A plurality of first guide rods 402 are fixedly installed on one end of the first sealing gasket 401 near the water inlet trough 209. A guide groove 210 is provided on the arc plate 2 at the position corresponding to the first guide rods 402. The first guide rods 402 are slidably connected to the guide grooves 210, and a tension spring 403 is fixedly installed on the end of the first guide rod 402. The end of the tension spring 403 away from the first guide rod 402 is fixedly connected to the inner wall of the guide groove 210.

[0033] By adopting the above technical solution, when the arc plate 2 is installed on the upper side of the support plate 1, the arc plate 2 can cooperate with the locking block 201 to squeeze the bellows 207 under the action of gravity, thereby increasing the pressure in the bellows 207. As a result, the pressure in the cavity 205 also increases synchronously. After the pressure in the cavity 205 increases, it can exert pressure on the first sealing gasket 401, so that the first sealing gasket 401 is tightly attached to the end of the water inlet 209 to seal the water inlet 209. When the arc plate 2 cracks, the pressure in the cavity 205 decreases, and the end of the first sealing gasket 401 near the inside of the cavity 205 is no longer squeezed by the fast-hardening water-stop cement or air inside the cavity 205.

[0034] A switch 211 is fixedly installed on the inner wall of the guide groove 210 away from the tension spring 403. An alarm 102 is fixedly installed on the end of the support plate 1 near the hinge block 202. The end of the guide rod away from the tension spring 403 is pressed into contact with the switch 211. The switch 211 is used to control the alarm 102 to work.

[0035] By adopting the above technical solution, when the first sealing gasket 401 is pushed by the water in the water storage chamber 301, the first sealing gasket 401 drives the first guide rod 402 to move, which can cause the first guide rod 402 to squeeze the switch 211. After the switch 211 is squeezed, it can control the alarm 102 to sound an alarm, thereby reminding the staff that the arc plate 2 has been damaged and should be replaced in time.

[0036] Multiple second anchor rods 103 are installed on both the arc plate 2 and the support plate 1. The second anchor rods 103 are inclined and penetrate through the arc plate 2 and the support plate 1 to extend to the other side. The end of the second anchor rod 103 near the hinge block 202 is lower than the other end. The second anchor rod 103 has a filter mesh structure. A water guide groove 104 is opened inside the second anchor rod 103. The water guide groove 104 is also filled with sponge 302.

[0037] By adopting the above technical solution, the sponge 302 inside the second anchor rod 103 can also absorb the surrounding water through capillary action, so that the water enters the water guide groove 104 inside the second anchor rod 103 and is discharged through the water guide groove 104.

[0038] Multiple contraction grooves 212 are provided at the ends of the two arc-shaped plates 2 that are close to each other. An extension block 213 is slidably installed inside the contraction groove 212. A threaded rod 214 is rotatably connected inside the contraction groove 212. The threaded rod 214 is rotatably connected to the contraction groove 212, and the outer side of the threaded rod 214 is threadedly connected to the extension block 213. A rubber wheel 215 is fixedly connected to the inner side of the threaded rod 214. The outer wall of the rubber wheel 215 is in frictional contact with the outer wall of the first anchor rod 3.

[0039] By adopting the above technical solution, when the first anchor rod 3 is inserted into the arc plate 2, the outer wall of the first anchor rod 3 can rub against the outer wall of the rubber wheel 215, thereby causing the rubber wheel 215 to rotate. When the rubber wheel 215 rotates, it can drive the threaded rod 214 fixedly connected to it to rotate. After the threaded rod 214 rotates, it can cause the protruding block 213 to move. Since the protruding block 213 is slidably connected to the contraction groove 212, the protruding block 213 will extend out from the inside of the contraction groove 212. When the ends of the protruding blocks 213 on the two arc plates 2 come into contact together, the threaded rod 214... The rotation will cease. At this point, the first anchor rod 3 continues to move. The rubber wheel 215 no longer rotates, but the first anchor rod 3 can still move relative to the rubber wheel 215. When the opposing protruding blocks 213 come into contact with each other, they can generate compressive force. When a collapse or landslide occurs on the side of the mine, the two support plates 1 tend to move closer to each other. The tendency of the support plates 1 to move can compress the locking block 201, thereby causing the lower ends of the two arc-shaped plates 2 to tend to move closer to each other. At this time, the protruding blocks 213 can act as a barrier to prevent the two arc-shaped plates 2 from rotating, thus maintaining their stability.

[0040] Both of the two arc-shaped plates 2 have protrusions 216 fixedly installed on the upper side of their close-to-each ends. There is a gap between the two protrusions 216. The protrusions 216 are used to prevent the lower side of the arc-shaped plates 2 from rotating upward around the insert rod 204.

[0041] By adopting the above technical solution, when falling rocks from the upper side of the mine shaft impact the arc-shaped plate 2, the arc-shaped plate 2 can play a buffering role under the action of the buffer spring 208. At the same time, the connection between the two arc-shaped plates 2 will move downward, and the lower ends of the two arc-shaped plates 2 are blocked by the support plate 1. Therefore, the two arc-shaped plates 2 will rotate relative to each other. The protrusion 216 can prevent the arc-shaped plates 2 from falling continuously, so that the arched part formed by the two arc-shaped plates 2 can still maintain stability and compressive strength after deformation.

[0042] The specific workflow of the technical solution provided by this invention is as follows: In use, first, fix the support plate 1 to the ground, ensuring it fits against the side of the mine shaft. Then, use the second anchor rod 103 to fix the support plate 1 to the side wall of the mine shaft for stability. Next, align the hinge blocks 202 of the arc-shaped plate 2 and insert the insertion rod 204 into the insertion hole 203. Adjust the angle of the two arc-shaped plates 2 so that the locking block 201 can be placed into the placement groove 101. Then, fix the arc-shaped plate 2 to the top of the mine shaft using the second anchor rod 103. After the second anchor rod 103 is installed, install the first anchor rod 3 on the arc-shaped plate 2. On plate 2, the first anchor rod 3 and the second anchor rod 103, after passing through the arc plate 2 and the support plate 1, can be fixed together with the arc plate 2 and the support plate 1 by bolts. After the first anchor rod 3 is installed, the soil that has seeped into the water storage cavity 301 and the water guide channel 104 is extracted. Then, a sponge 302 is placed inside the water storage cavity 301 and the water guide channel 104 to complete the installation. When it is necessary to dismantle the equipment, the first anchor rod 3 and the second anchor rod 103 can be removed from the arc plate 2 and the support plate 1.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A coal mine roof reinforcement structure, characterized in that, include: Two support plates and two arc-shaped plates: each support plate has a placement groove at its upper end, and a locking block is slidably installed at the lower end of the arc-shaped plate near the support plate. The size of the placement groove is larger than the size of the locking block. Two curved plates are fixedly installed with hinge blocks at their close ends. Each hinge block has a through hole in its center, and a rod is inserted into the hole. The arc-shaped plate has a cavity inside, the inner wall of which is coated with a waterproof layer and is used to fill the cavity with quick-hardening waterproof cement. There is a gap between the locking block and the arc-shaped plate, and multiple corrugated pipes and buffer springs are installed inside the gap between the locking block and the arc-shaped plate. The end of the corrugated pipe near the cavity extends through the arc-shaped plate into the cavity. Multiple first anchor rods are installed through the upper side of the arc-shaped plate. The first anchor rods have a water storage cavity inside and a filter mesh structure on the upper side of the first anchor rod. The buffer springs compress the arc-shaped plate.

2. The coal mine roof reinforcement structure according to claim 1, characterized in that, A water inlet groove is provided on the inner wall of the cavity near the first anchor rod. The end of the water inlet groove away from the cavity is connected to the interior of the water storage cavity. A first sealing component is provided at the end of the water inlet groove near the cavity. The first sealing component is used to seal the water inlet groove.

3. The coal mine roof reinforcement structure according to claim 2, characterized in that, The first sealing assembly includes a first sealing gasket, the size of which is larger than the size of the water inlet tank. A plurality of first guide rods are fixedly installed on the end of the first sealing gasket near the water inlet tank. A guide groove is provided on the arc plate at the position corresponding to the first guide rod. The first guide rod is slidably connected to the guide groove, and a tension spring is fixedly installed on the end of the first guide rod. The end of the tension spring away from the first guide rod is fixedly connected to the inner wall of the guide groove.

4. The coal mine roof reinforcement structure according to claim 3, characterized in that, A switch is fixedly installed on the inner wall of the guide groove away from the tension spring. An alarm is fixedly installed on the end of the support plate near the hinge block. The end of the guide rod away from the tension spring is pressed into contact with the switch. The switch is used to control the alarm to work.

5. The coal mine roof reinforcement structure according to claim 4, characterized in that, The upper part of the first anchor rod, corresponding to the filter mesh, is filled with multiple sponges, which are used to absorb moisture from the surrounding soil.

6. The coal mine roof reinforcement structure according to claim 5, characterized in that, The lower end of the first anchor bolt is provided with a second sealing assembly, which is used to seal the lower end of the water storage chamber; The second sealing assembly includes a second sealing gasket, and a plurality of second guide rods are fixedly installed on the upper end of the second sealing gasket. The second guide rods pass through the protruding part of the end of the first anchor rod and are slidably connected thereto. A compression spring is sleeved on the outer side of the middle part of the second guide rod. The upper end of the compression spring is fixedly connected to the second guide rod, and the lower end of the compression spring is fixedly connected to the first anchor rod.

7. The coal mine roof reinforcement structure according to claim 6, characterized in that, Multiple second anchor rods are installed on both the arc-shaped plate and the support plate. The second anchor rods are inclined and penetrate the arc-shaped plate and the support plate to extend to the other side. The end of the second anchor rod near the hinge block is lower than the other end. The second anchor rods are all in the form of a filter mesh structure. A water guide groove is opened inside the second anchor rod, and the water guide groove is also filled with sponge.

8. The coal mine roof reinforcement structure according to claim 7, characterized in that, Multiple contraction grooves are provided at the ends of the two arc-shaped plates that are close to each other. An extension block is slidably installed inside the contraction groove. A threaded rod is rotatably connected inside the contraction groove. The outer side of the threaded rod is threadedly connected to the extension block. A rubber wheel is fixedly connected to the inner side of the threaded rod. The outer wall of the rubber wheel is in frictional contact with the outer wall of the first anchor rod.

9. The coal mine roof reinforcement structure according to claim 8, characterized in that, Both of the two arc-shaped plates have protrusions fixedly installed on the upper side of their adjacent ends, with a gap between the two protrusions. The protrusions are used to prevent the lower side of the arc-shaped plates from rotating upward around the insert rod.

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