Aiming at grouting device and grouting method

Abstract

The present application relates to the technical fields of grouting reinforcement, in particular to a fixed-point grouting device and a grouting method, which comprises a reinforcement layer and a grouting equipment, the inside of the reinforcement layer is provided with the grouting equipment, the top of the grouting equipment is communicated with a grouting pipe, the other end of the grouting pipe is provided with a grouting mechanism, the upper side of an adjusting assembly is close to the inner wall of the reinforcement layer; one end of a hollow anchor rod is fixedly connected with a drill bit, the inside of the hollow anchor rod is provided with an inner pipe, one end of the inner pipe is fixedly connected with a connector, the outer side of the connector is connected with the grouting pipe, and the outer side of the connector is fixedly connected with a driven gear; after the drilling is completed by the hollow anchor rod, the inner pipe is installed in the hollow anchor rod, one end of the inner pipe is connected with the grouting pipe through the connector, the connector is arranged on the outer side of a support frame through the external driven gear, the support frame is extruded and fixed, the grouting equipment is started, at this time, the slurry can be pumped out and injected into the inner pipe through the grouting equipment, and then the rock area is grouted and reinforced through the drill bit.

Description

Technical Field

[0001] This invention relates to the field of grouting reinforcement technology, specifically to a fixed-point grouting device and grouting method. Background Technology

[0002] Many coal mines encounter problems during coal mining, such as thin interlayer spacing, difficulty in roof management, coal-rock separation and collapse, and easy borehole collapse during anchor drilling. These problems severely restrict mine safety and production efficiency. The common solution is to use hollow grouting anchors to transform passive support into active support. By grouting in advance, the rock mass is reinforced and stabilized, and the grout can penetrate into the rock fissures for further reinforcement. However, the existing grouting method discharges the grout through the other end of the hollow anchor to reinforce the rock layer. During grouting, it is impossible to inject the grout into the rock mass area on the side of the hollow anchor. Therefore, this grouting reinforcement technology needs further improvement. To address the above problems, a fixed-point grouting device and grouting method are proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a fixed-point grouting device and grouting method to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] As an optional embodiment of the fixed-point grouting device and grouting method described in this invention, the fixed-point grouting device and grouting method include a reinforcement layer and grouting equipment.

[0006] The reinforcement layer is equipped with a grouting device. The top of the grouting device is connected to a grouting pipe, and the other end of the grouting pipe is equipped with a grouting mechanism, which is inserted into the reinforcement layer.

[0007] A support mechanism is also fixedly connected to one side of the grouting equipment. An adjustment component is provided on the top of the support mechanism, and the upper part of the adjustment component is in close contact with the inner wall of the reinforcement layer.

[0008] The grouting mechanism includes a hollow anchor rod, a drill bit, and a baffle plate. One end of the hollow anchor rod is fixedly connected to the drill bit. The hollow anchor rod has an inner tube inside. One end of the inner tube is fixedly connected to a connector. The outside of the connector is connected to the grouting pipe. A driven gear is fixedly connected to the outside of the connector.

[0009] As an optional embodiment of the fixed-point grouting device and grouting method described in this invention, a sealing gasket is fixedly connected to the outer side of the driven gear.

[0010] As an optional embodiment of the fixed-point grouting device and grouting method described in this invention, the hollow anchor rod is internally fixedly connected to a baffle plate, and the baffle plate has a through hole in the center.

[0011] As an optional embodiment of the fixed-point grouting device and grouting method described in this invention, the hollow anchor rod and the outer side of the inner tube are both provided with discharge holes.

[0012] As an optional embodiment of the fixed-point grouting device and grouting method described in this invention, a pressure sensor for detecting mud pressure is also installed on the outside of the output end of the grouting equipment.

[0013] Many coal mines encounter problems during coal mining, such as thin interlayer spacing, difficulty in roof management, coal-rock separation and collapse, and easy borehole collapse during anchor drilling. These problems severely restrict mine safety and production efficiency. A common solution is to use hollow grouting anchors, transforming passive support into active support. Pre-grouting reinforces the rock mass, and the grout can penetrate into rock fissures for further reinforcement. However, current grouting methods discharge grout through the other end of the hollow anchor for rock reinforcement. This method cannot inject grout into the rock mass area on the side of the hollow anchor. Therefore, this grouting reinforcement technology needs further improvement. After drilling with hollow anchors, an inner tube is installed inside the hollow anchor. One end of the inner tube is connected to the grouting pipe via a connector. The connector is mounted on the outside of a support frame via an external driven gear and secured by the support mechanism and frame. By activating the grouting equipment, the grout can be extracted and injected into the inner tube. The grouting process involves inserting the drill bit into the inner tube and then injecting grout through the drainage holes on the drill bit surface to reinforce the deep rock layers. A sealing gasket is fixedly connected to the outside of the driven gear to ensure tight contact with the reinforcement layer and prevent grout leakage. A baffle plate ensures the inner sleeve is precisely positioned at the designated location on the hollow anchor rod, and a through-hole in the center of the baffle plate ensures stable grout discharge. Both the hollow anchor rod and the inner tube have discharge holes on their outer sides. After grouting, when the pressure sensor detects a certain grout pressure, the driven gear rotates via an adjusting component, causing the inner tube to rotate. At this point, a portion of the discharge holes on the outer sides of the hollow anchor rod and the inner tube overlap, allowing grout to drain through these overlapping holes and fill and reinforce the cracks in the rock layer. When the pressure sensor detects a certain grout pressure, the above steps are repeated to ensure that a portion of the discharge holes on the outer sides of the hollow anchor rod and the inner tube continue to overlap, ensuring the filling and reinforcement of the rock layer around the hollow anchor rod and contributing to rock layer stability.

[0014] As an optional embodiment of the fixed-point grouting device and grouting method described in this invention, the supporting mechanism includes a fixed frame, a first motor, and a threaded shaft. The bottom of the fixed frame is fixedly connected to the grouting equipment. The first motor is fixedly connected inside the fixed frame. The threaded shaft is fixedly connected to the end of the main shaft of the first motor. A threaded sleeve is spirally connected to the outside of the threaded shaft. A sliding plate is fixedly connected to the top of the threaded sleeve. A central support rod is fixedly connected to the top of the sliding plate.

[0015] As an optional embodiment of the fixed-point grouting device and grouting method described in this invention, the central support rod is rotatably connected to both sides of the central support rod, and both the central support rod and the side support rods have placement grooves at their tops.

[0016] When fixing the adjustment component, the first motor is started to drive the threaded shaft to rotate, which in turn drives the threaded sleeve to move. The threaded shaft then drives the sliding plate to move, and the sliding plate causes the central support rod above to separate from the fixed frame. At this time, the side support rods on both sides of the central support rod rotate, and the adjustment component can be supported by the placement slots above the central support rod and the side support rods to ensure stable support of the adjustment component.

[0017] As an optional embodiment of the fixed-point grouting device and grouting method described in this invention, the adjusting component includes a support frame, a sliding block, and a connecting plate. The sliding block is slidably connected inside the support frame, and the connecting plate is fixedly connected to the front and rear sides of the sliding block. The connecting plate is provided with a fixing screw inside, and the fixing screw passes through the connecting plate and is spirally connected to the support frame. A protective frame is also fixedly connected to the outside of the sliding block. A second motor is connected inside the sliding block, and the main shaft of the second motor is fixedly connected to a drive gear.

[0018] After the support frame is in close contact with the inner wall of the rock stratum, the sliding block causes the driving gear of the second motor spindle inside to engage with the driven gear. Then, the connecting plate can be fixed inside the support frame by fixing screws to ensure that the driven gear is driven to rotate and adjust the rotation of the inner sleeve.

[0019] As an optional solution to the fixed-point grouting device and grouting method described in this invention, the usage steps are as follows;

[0020] Step 1: Drill holes in the reinforcement layer using a drilling device, and then install the grouting mechanism inside the drilled holes;

[0021] Step 2: Move the grouting equipment to a suitable position and activate the support mechanism to move the adjustment component so that the adjustment component is tightly attached to the inner wall of the reinforcement layer to fix the grouting mechanism;

[0022] Step 3: Connect the grouting pipe to the grouting mechanism and start the grouting equipment. At this time, the inner wall of the reinforcement layer can be fixed by grouting through the grouting mechanism.

[0023] Step 4: When the grouting pressure inside the reinforcement layer reaches a certain level, the grouting mechanism is rotated by starting the adjustment component. At this time, the grouting holes can be changed to disperse the grouting treatment on the inner wall of the reinforcement layer to ensure the reinforcement effect.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] This invention involves drilling with a hollow anchor rod, then installing an inner tube inside the hollow anchor rod. One end of the inner tube is connected to a grouting pipe via a connector. The connector is mounted on the outside of a support frame via an external driven gear and is secured by the support frame. By activating the grouting equipment, grout can be extracted and injected into the inner tube. The rock area is then reinforced through the grout discharge hole of the drill bit. Simultaneously, the grout can be discharged into the rock layer from the side to fill and reinforce cracks in the rock layer, further ensuring the reinforcement effect.

[0026] After grouting reinforcement, the pressure of the grout is detected by a pressure sensor. When the pressure reaches a certain value, it indicates that the rock mass grouting reinforcement is complete. Then, the support mechanism is activated to move the adjustment components. After the support frame is loosened to a certain extent, the second motor is activated to drive the drive gear to rotate. The drive gear drives the driven gear to rotate, and the driven gear drives the inner tube to rotate. At this time, the outer side of the inner tube and the outer side of the hollow anchor are aligned. At this time, the grout can be discharged through the hollow anchor and the side of the inner tube. At this time, the rock mass cracks can be filled with grout for further reinforcement work.

[0027] A sealing gasket is installed on the outside of the driven gear, which can then make close contact with the reinforcement layer to prevent grout leakage and ensure filling quality.

[0028] By sliding the sliding block inside the support frame and fixing the connecting plate to the outside of the support frame with fixing screws, it can be ensured that the driving gear and the driven gear are fully engaged to drive the driven gear to rotate.

[0029] When fixing the inner tube, the first motor is started to drive the threaded shaft to rotate, which in turn drives the threaded sleeve to move. The threaded sleeve then drives the sliding plate to move, which in turn drives the central support rod to move upward. At this time, the central support rod drives the support frame to move upward, and the side support rods on the side of the central support rod can be opened to support both sides of the support frame. Since the side support rods rotate at a certain angle, their bottoms contact the central support rod, which ensures that the side support rods cannot rotate excessively. This allows the side support rods and the central support rod to support and fix the support frame, ensuring the stability of the support frame and achieving fixation through the engagement of the driven gear. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a fixed-point grouting device and grouting method;

[0031] Figure 2 This is a schematic diagram of the grouting mechanism structure of a fixed-point grouting device and grouting method;

[0032] Figure 3 This is a schematic diagram of the support mechanism structure for a fixed-point grouting device and grouting method;

[0033] Figure 4 This is a schematic diagram of the adjustment component structure of a fixed-point grouting device and grouting method;

[0034] Figure 5 A fixed-point grouting device and grouting method Figure 4 A schematic diagram of the structure at point A;

[0035] Figure 6 This is a schematic diagram of the installation structure of the second motor in a fixed-point grouting device and grouting method.

[0036] In the diagram: 1. Reinforcement layer; 2. Grouting equipment; 3. Support mechanism; 301. Fixing frame; 302. First motor; 303. Threaded shaft; 304. Threaded sleeve; 305. Sliding plate; 306. Central support rod; 307. Side support rod; 4. Adjustment assembly; 401. Support frame; 402. Sliding block; 403. Connecting plate; 404. Fixing screw; 405. Protective frame; 406. Second motor; 407. Drive gear; 5. Grouting pipe; 6. Grouting mechanism; 601. Hollow anchor rod; 602. Drill bit; 603. Baffle plate; 604. Inner pipe; 605. Connector; 606. Driven gear; 607. Sealing gasket; 7. Pressure sensor. Detailed Implementation

[0037] Example 1:

[0038] Please see Figure 1 and Figure 2 The present invention provides a technical solution:

[0039] A fixed-point grouting device and grouting method, comprising a reinforcement layer 1 and grouting equipment 2,

[0040] The reinforcement layer 1 is equipped with a grouting device 2. The top of the grouting device 2 is connected to a grouting pipe 5. The other end of the grouting pipe 5 is equipped with a grouting mechanism 6. The grouting mechanism 6 is inserted into the reinforcement layer 1.

[0041] A support mechanism 3 is fixedly connected to one side of the grouting equipment 2. An adjustment component 4 is provided on the top of the support mechanism 3. The upper part of the adjustment component 4 is closely attached to the inner wall of the reinforcement layer 1.

[0042] The grouting mechanism 6 includes a hollow anchor rod 601, a drill bit 602, and a baffle plate 603. One end of the hollow anchor rod 601 is fixedly connected to the drill bit 602. The hollow anchor rod 601 has an inner tube 604 inside. One end of the inner tube 604 is fixedly connected to a connector 605. The outer side of the connector 605 is connected to the grouting pipe 5. A driven gear 606 is fixedly connected to the outer side of the connector 605.

[0043] A sealing gasket 607 is fixedly connected to the outer side of the driven gear 606.

[0044] The hollow anchor rod 601 is internally fixedly connected to a baffle plate 603, and the baffle plate 603 has a through hole in the center.

[0045] Both the hollow anchor rod 601 and the inner tube 604 have discharge holes on their outer sides.

[0046] A pressure sensor 7 for detecting mud pressure is also installed on the outside of the output end of the above-mentioned grouting equipment 2.

[0047] The usage steps are as follows;

[0048] Step 1: Drill holes in the reinforcement layer 1 using a drilling device, and then install the grouting mechanism 6 into the drilled holes.

[0049] Step 2: Move the grouting equipment 2 to a suitable position and start the support mechanism 3 to move the adjustment component 4 so that the adjustment component 4 is tightly attached to the inner wall of the reinforcement layer 1 to fix the grouting mechanism 6.

[0050] Step 3: Connect the grouting pipe 5 to the grouting mechanism 6 and start the grouting equipment 2. At this time, the inner wall of the reinforcement layer 1 can be fixed by grouting through the grouting mechanism 6.

[0051] Step 4: When the grouting pressure inside the reinforcement layer 1 reaches a certain level, the grouting mechanism 6 is rotated by starting the adjustment component 4. At this time, the grouting hole can be changed to perform dispersed grouting treatment on the inner wall of the reinforcement layer 1 to ensure the reinforcement effect.

[0052] Many coal mines encounter problems during coal mining, such as thin interlayer spacing, difficulty in roof management, coal-rock separation and collapse, and easy borehole collapse during anchor drilling. These problems severely restrict mine safety and production efficiency. A common solution is to use hollow grouting anchors, transforming passive support into active support. Pre-grouting reinforces and stabilizes the rock mass, and the grout can penetrate into rock fissures for further reinforcement. However, existing grouting methods discharge grout through the other end of the hollow anchor for rock reinforcement, but this method cannot inject grout into the hollow core during grouting. The rock mass area on the side of the anchor bolt is a critical area, therefore, this grouting reinforcement technology needs further improvement. After drilling through the hollow anchor bolt 601, an inner tube 604 is installed inside the hollow anchor bolt 601, and one end of the inner tube 604 is connected to the grouting pipe 5 through a connector 605. The connector 5 is mounted on the outside of the support frame 401 through an external driven gear 606, and is squeezed and fixed by the cooperation of the support mechanism 3 and the support frame 401. By starting the grouting equipment 2, the grout can be extracted and injected into the inner tube 604 through the grouting equipment 2, and then through the drill bit 6. The grout drainage holes on the surface of 02 are used for grouting reinforcement of the deep rock layer. A sealing gasket 607 is fixedly connected to the outside of the driven gear 606. The sealing gasket 607 ensures tight contact with the reinforcement layer 1, preventing grout leakage. Simultaneously, the baffle plate 603 ensures that the inner sleeve 604 is precisely positioned at the designated location of the hollow anchor rod 601. A through hole in the center of the baffle plate 603 ensures stable grout discharge. Both the hollow anchor rod 601 and the inner tube 604 have discharge holes on their outer sides. After grouting is completed, when the pressure sensor 7 detects the grout pressure... After reaching a certain value, the driven gear 606 is rotated by the adjusting component 4, which in turn causes the inner tube 604 to rotate. At this time, a portion of the discharge hole on the outside of the hollow anchor rod 601 and the inner tube 604 overlaps. The grout can then be discharged through the overlapping discharge hole to fill and reinforce the cracks in the rock strata. When the pressure sensor 7 detects that the grout pressure is at a certain value, the above steps are repeated to ensure that a portion of the discharge hole on the outside of the hollow anchor rod 601 and the inner tube 604 continues to overlap. This ensures that the rock strata around the hollow anchor rod 601 are filled and reinforced, which helps to ensure the stability of the rock strata.

[0053] Example 2

[0054] This embodiment is an improvement made to Implementation 1. Please refer to [link / reference]. Figure 3Specifically, the aforementioned support mechanism 3 includes a fixed frame 301, a first motor 302, and a threaded shaft 303. The bottom of the fixed frame 301 is fixedly connected to the grouting equipment 2. The first motor 302 is fixedly connected inside the fixed frame 301. The threaded shaft 303 is fixedly connected to the end of the main shaft of the first motor 302. A threaded sleeve 304 is screwed to the outside of the threaded shaft 303. A sliding plate 305 is fixedly connected to the top of the threaded sleeve 304. A central support rod 306 is fixedly connected to the top of the sliding plate 305.

[0055] The central support rod 306 is rotatably connected to the two sides of the central support rod 306, and the top of both the central support rod 306 and the side support rod 307 are provided with placement grooves.

[0056] When fixing the adjustment component 4, the first motor 302 is started to drive the threaded shaft 303 to rotate, and the threaded shaft 303 drives the threaded sleeve 304 to move. The threaded shaft 304 drives the sliding plate 305 to move, and the sliding plate 305 drives the central support rod 306 above to separate from the fixed frame 301. At this time, the side support rods 307 on both sides of the central support rod 306 rotate. Then, the adjustment component 4 can be supported by the placement groove above the central support rod 306 and the side support rods 307 to ensure stable support of the adjustment component 4.

[0057] Example 3

[0058] This embodiment is an improvement upon the two implementation examples. Please refer to [link / reference]. Figure 4 , Figure 5 and Figure 6 Specifically, the aforementioned adjustment component 4 includes a support frame 401, a sliding block 402, and a connecting plate 403. The sliding block 402 is slidably connected inside the support frame 401. The connecting plate 403 is fixedly connected to the front and rear sides of the sliding block 402. The connecting plate 403 is provided with a fixing screw 404 inside. The fixing screw 404 passes through the connecting plate 403 and is spirally connected to the support frame 401. A protective frame 405 is also fixedly connected to the outside of the sliding block 402. A second motor 406 is connected inside the sliding block 402. The main shaft of the second motor 406 is fixedly connected to a drive gear 407.

[0059] After the support frame 401 is in close contact with the inner wall of the rock stratum, the sliding block 402 causes the drive gear 407 of the main shaft of the second motor 406 inside to engage with the driven gear 606. Then, the connecting plate 403 can be fixed inside the support frame 401 by the fixing screw 404 to ensure that the driven gear 606 is driven to rotate and the inner sleeve 604 is adjusted to rotate.

[0060] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A fixed-point grouting device, characterized in that: It includes a reinforcement layer (1) and grouting equipment (2). The reinforcement layer (1) is provided with a grouting device (2), the top of the grouting device (2) is connected to a grouting pipe (5), and the other end of the grouting pipe (5) is equipped with a grouting mechanism (6), which is inserted into the reinforcement layer (1). A support mechanism (3) is fixedly connected to one side of the grouting equipment (2). An adjustment component (4) is provided on the top of the support mechanism (3). The upper part of the adjustment component (4) is close to the inner wall of the reinforcement layer (1). The adjustment component (4) includes a support frame (401), a sliding block (402) and a connecting plate (403). The sliding block (402) is slidably connected inside the support frame (401). The front and rear sides of the sliding block (402) are fixedly connected to the connecting plate (403). The connecting plate (403) is provided with a fixing screw (404). The fixing screw (404) passes through the connecting plate (403) and is spirally connected to the support frame (401). A protective frame (405) is fixedly connected to the outside of the sliding block (402). A second motor (406) is connected inside the sliding block (402). The main shaft of the second motor (406) is fixedly connected to a drive gear (407). The drive gear (407) cooperates with the driven gear (606). The grouting mechanism (6) includes a hollow anchor rod (601), a drill bit (602), and a baffle plate (603). One end of the hollow anchor rod (601) is fixedly connected to the drill bit (602). Grouting and reinforcement work is carried out on the deep rock layer through the grout discharge hole on the surface of the drill bit (602). The hollow anchor rod (601) is provided with an inner tube (604). The hollow anchor rod (601) and the inner tube (604) are both provided with discharge holes on the outside. One end of the inner tube (604) is fixedly connected to a connector (605). The outside of the connector (605) is connected to the grouting pipe (5). The outside of the connector (605) is fixedly connected to a driven gear (606).

2. The fixed-point grouting device according to claim 1, characterized in that: A sealing gasket (607) is fixedly connected to the outer side of the driven gear (606).

3. The fixed-point grouting device according to claim 1, characterized in that: The hollow anchor rod (601) is internally fixedly connected to a baffle plate (603), and the baffle plate (603) has a through hole in the center.

4. A fixed-point grouting device according to claim 1, characterized in that: The grouting equipment (2) is also equipped with a pressure sensor (7) for detecting mud pressure on the outside of the output end.

5. A fixed-point grouting device according to claim 1, characterized in that: The support mechanism (3) includes a fixed frame (301), a first motor (302) and a threaded shaft (303). The bottom of the fixed frame (301) is fixedly connected to the grouting equipment (2). The first motor (302) is fixedly connected inside the fixed frame (301). The threaded shaft (303) is fixedly connected to the end of the main shaft of the first motor (302). The threaded sleeve (304) is spirally connected to the outside of the threaded shaft (303). The sliding plate (305) is fixedly connected to the top of the threaded sleeve (304). The central support rod (306) is fixedly connected to the top of the sliding plate (305).

6. A fixed-point grouting device according to claim 5, characterized in that: The central support rod (306) is rotatably connected to the two sides of the side support rod (307), and the top of both the central support rod (306) and the side support rod (307) is provided with a placement groove.

7. A grouting method for a fixed-point grouting device according to any one of claims 1-6, characterized in that: The usage steps are as follows; Step 1: Drill holes in the reinforcement layer (1) using a drilling device, and then install the grouting mechanism (6) into the hole. Step 2: Move the grouting equipment (2) to a suitable position and start the support mechanism (3) to drive the adjustment component (4) to move so that the adjustment component (4) is in close contact with the inner wall of the reinforcement layer (1) to fix the grouting mechanism (6). Step 3: Connect the grouting pipe (5) to the grouting mechanism (6) and start the grouting equipment (2). At this time, the inner wall of the reinforcement layer (1) can be grouted and fixed by the grouting mechanism (6). Step 4: When the grouting pressure inside the reinforcement layer (1) reaches a certain level, the grouting mechanism (6) is rotated by starting the adjustment component (4). At this time, the grouting hole can be changed to disperse the grouting treatment on the inner wall of the reinforcement layer (1) to ensure the reinforcement effect.

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