Grouting equipment for mine vein microfissures

Abstract

The invention belongs to the field of mine water inrush crack treatment equipment, and provides mine vein micro-crack grouting equipment which comprises a ground grouting station, a movable traction device and an in-roadway supporting device, the movable traction device is used for rotatably retracting and releasing a grouting pipe, and the in-roadway supporting device comprises a telescopic assembly. The telescopic assembly is provided with a pair of penetrating holes used for penetrating a grouting pipe in the telescopic direction of the telescopic assembly, the front end of the telescopic assembly is provided with a pull-type righting assembly and a self-adaptive balance frame, and the pull-type righting assembly is used for righting the front end of the grouting pipe and enabling the grouting pipe to be inserted into a water inrush point. The grouting pipe is collected and released by adopting the movable traction device, the collecting and releasing efficiency of the grouting pipe in a roadway can be improved, the supporting device in the roadway can rapidly support the grouting pipe, a worker can conveniently insert the grouting pipe into a water inrush node on the ground in the roadway through the traction type centralizing assembly and the self-adaptive balancing frame, the working efficiency is improved, and the labor intensity of the worker is lowered. And the treatment period of the temporary water inrush crack can be shortened.

Description

Technical Field

[0001] This invention belongs to the field of mine water inrush crack treatment equipment, and relates to a grouting device for micro-cracks in mine veins. Background Technology

[0002] The management of water inrush cracks in mines includes both proactive prevention and temporary rescue measures. For unexcavated haulage roadways, which are crucial for underground mine operations, precision directional drilling technology is highly mature and widely used in petroleum, coal, municipal, and mine rescue fields. Therefore, proactive directional drilling along the roadways for effective water inrush detection and grouting in unexcavated roadways plays a vital role in ensuring mine construction safety and accelerating the construction process. However, resolving temporary water inrush problems during mine construction and roadway excavation requires on-site rescue measures; otherwise, it will significantly hinder mine construction and severely impact the construction schedule and safe production.

[0003] For comprehensive treatment after a water inrush, drainage measures must be combined with the introduction of grouting materials prepared by ground grouting stations or mobile grouting stations into the water inrush point. Grouting gradually reduces the area of ​​the water inrush, ultimately stopping the water flow. Currently, grouting operations after a water inrush require dragging long grouting pipes through the tunnel. Due to the uncertainty of the water inrush point / grouting point, dragging and moving the grouting pipes often results in a large workload and low efficiency, especially when the grouting pipes need to be turned back between the preceding and following water inrush points. Furthermore, for higher grouting points, workers need to temporarily erect scaffolding and insert the end of the grouting pipe into a temporary grouting hole drilled by a drilling machine. The grouting pipe also requires prolonged manual holding and support, resulting in high labor intensity and a long construction period. Summary of the Invention

[0004] This invention addresses the technical problems existing in the grouting operation of mine fissures in water inrush, and proposes a grouting device for micro-fissures in mine veins that is reasonably designed, easy to deploy and transfer grouting pipes, and conducive to reducing labor intensity and improving work efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a grouting device for micro-fractures in mine veins, including a ground grouting station. The ground grouting station includes a central control room and a cement silo. The output side of the cement silo is equipped with a screw conveyor, a slurry mixer, and a grouting pump. The supply side of the grouting pump is equipped with a grouting pipe. The grouting pipe is wound around a mobile traction device. The mobile traction device includes a rotating and retracting frame for rotating and retracting the grouting pipe. The pull-out side of the mobile traction device is equipped with a roadway support device that is relatively independent of it. The roadway support device includes a telescopic component. The telescopic component is equipped with a pair of through holes for guiding the grouting pipe along the telescopic direction of the telescopic component. The front end of the telescopic component is equipped with a traction-type straightening component. The traction-type straightening component is used to straighten the front end of the grouting pipe and insert the grouting pipe into the water inrush point. Below the traction-type straightening component is an adaptive balancing frame connected to the telescopic component. The adaptive balancing frame is used to support the device near the water inrush point.

[0006] Preferably, the mobile traction device includes a square chassis frame with four evenly distributed casters at the bottom. Each side edge of the chassis frame is equipped with a first anti-collision wheel. The chassis frame has an annular mounting frame, and the rotating and retracting frame is located on the outside of the mounting frame. A support frame is located on the inside of the mounting frame. A handrail is located on the top of the support frame, parallel to the chassis frame. The height distance between the handrail and the chassis frame is less than the length and width of the chassis frame, and at least one pair of reinforcing bars are provided. Second anti-collision wheels are provided at both ends of the handrail, and the wheel tangents of the second and first anti-collision wheels are located in the same vertical plane.

[0007] Preferably, the rotating rack includes a rotating cylinder, the inner wall of which is provided with a rotating support groove for the top support of the mounting frame, the top of the rotating cylinder is provided with a plurality of evenly distributed hinges, the hinges are provided with downward flipping plate buckles, the bottom of the plate buckles is provided with locking teeth, the locking teeth are engaged with annular locking protrusions provided on the bottom edge of the rotating cylinder, and the top of the rotating cylinder is provided with four arc-shaped handles spaced apart from the hinges.

[0008] Preferably, the support frame includes a support cylinder with reinforcing ribs on its side. The reinforcing ribs are located on the top surface of the rotating and unfolding frame. The top surface of the support cylinder is inclined, and the highest horizontal part of the inclined surface is used to connect the handrail frame. The bottom of the support cylinder is supported and cooperates with a limiting plate provided on the inner wall of the mounting frame. The inside of the support cylinder is provided with a connecting cylinder that is connected to the bottom of the mounting frame by vertical bolts. The bottom of the connecting cylinder and the bottom of the mounting frame are both open.

[0009] Preferably, the handrail includes a U-shaped section, a round rod is provided in the middle of the U-shaped section, a rotating block is provided on the round rod to rotate with it, a Z-shaped handle is provided on the rotating block, and the support frame is provided with a groove for cooperating with the Z-shaped handle near the handrail.

[0010] Preferably, the telescopic assembly includes a main board and an adjusting plate. The adjusting plate includes a sliding section, the bottom of which is provided with a braking bolt for connecting to the main board. Slide sections are provided on both sides of the sliding section. At the end of the slide section away from the sliding section, a first support plate section and a second support plate section of different lengths are provided. The adjusting plate is provided with two grips that are staggered vertically on the surface of the main board. The grips are in contact with the surface of the grouting pipe.

[0011] Preferably, the main board has a plurality of anti-deformation rods spaced apart along its length near its front end. The anti-deformation rods are U-shaped with the U-shaped opening facing the grouting pipe's insertion path, and a friction sleeve is provided in the middle of the anti-deformation rod.

[0012] Preferably, the traction-type straightening assembly includes a support bearing fixedly disposed at the end of the telescopic assembly. A rotating shaft is disposed at the center of the support bearing. A swing arm is disposed at one end of the rotating shaft and engages therethrough. Two straightening rods are disposed at both ends of the swing arm in a V-shape. A spring is disposed between the support bearing and the swing arm. The two ends of the rotating shaft extend at least 15 cm beyond the support bearing and the swing arm, respectively. A top bolt and a tail bolt are disposed on the rotating shaft to limit its axial position. An end cap is disposed at the tail end of the rotating shaft. A traction rope is disposed through the end cap. The portion of the traction rope inside the end cap is spirally wound with the rotating shaft. The traction rope has a loop-shaped structure.

[0013] Preferably, the adaptive balancing frame includes a rotary joint disposed on the bottom front end of the telescopic component. The bottom of the rotary joint is provided with a guide cone, which includes a cylindrical section and a conical section. The side of the cylindrical section is provided with at least four radially distributed connection holes. A balance bar is disposed in each connection hole. The length of the balance bar in all connection holes is different, and the length of the smallest balance bar is at least greater than the distance between the center of the rotary joint and the front end of the traction-type straightening component.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows: This invention provides a grouting device for micro-fractures in mine veins. By employing a mobile traction device to deploy and retrieve the grouting pipe, the efficiency of pipe deployment and retrieval within the roadway is improved, and interference with other equipment is reduced. The grouting pipe can be quickly supported using an in-road support device, and the traction-type straightening component and self-adaptive balancing frame facilitate insertion of the grouting pipe into the water inrush point by workers on the roadway surface, thus improving work efficiency and shortening the rescue cycle for temporary water inrush fractures. This invention is rationally designed, facilitates the deployment and transfer of the grouting pipe, reduces workload, and increases efficiency, making it suitable for large-scale deployment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a grouting device for microfractures in a mine vein, provided as an example; Figure 2 A plan view of the ground grouting station provided for the embodiment; Figure 3 A perspective view of the mobile traction device and the tunnel support device provided in the embodiment; Figure 4 for Figure 3 Enlarged schematic diagram of the support device at point A in the middle lane; Figure 5 A front view of the mobile traction device provided in the embodiment; Figure 6 for Figure 5 A cross-sectional view of the mobile traction device along the GG direction; Figure 7 for Figure 6 Enlarged schematic diagram of the mobile traction device at point B; Figure 8 A schematic diagram of the bottom structure of the mobile traction device and the in-tunnel support device; Figure 9 for Figure 8 A cross-sectional view of the support device in the middle lane along the FF direction; Figure 10 for Figure 9 Enlarged schematic diagram of the support device at point C in the middle lane; Figure 11 A schematic diagram showing the first and second anti-collision wheels as temporary running wheels; In the above figures: 1. Central control room; 2. Cement silo; 3. Screw conveyor; 4. Pulping machine; 5. Grouting pump; 6. Grouting pipe; 7. Mobile traction device; 71. Rotating take-up and take-down frame; 711. Rotating cylinder; 712. Rotating support groove; 713. Hinge; 714. Plate buckle; 715. Clamping tooth; 716. Annular clasp; 717. Arc-shaped handle; 72. Chassis frame; 73. Casters; 74. First anti-collision wheel; 75. Mounting frame; 751. Limiting plate; 752. Opening; 76. Support frame; 761. Support cylinder; 762. Inclined surface; 763. Vertical bolt; 764. Connecting cylinder; 765. Clamping groove; 766. Reinforcing rib; 77. Handrail frame; 771. U-shaped section; 772. Round rod; 773. Rotating block; 77 4. Z-shaped handle; 78. Reinforcing bar; 79. Second anti-collision wheel; 8. Lane support device; 81. Telescopic assembly; 811. Main board; 812. Adjusting plate; 8121. Sliding buckle section; 8122. Sliding plate section; 8123. First support plate section; 8124. Second support plate section; 8125. Handle; 813. Brake bolt; 82. Perforation; 83. Traction-type straightening assembly; 831. Support bearing; 832. Rotary shaft; 833. Swing arm; 834. Straightening bar; 835. Spring; 836. Top bolt; 837. Tail bolt; 838. Traction rope; 839. End cap; 84. Adaptive balance frame; 841. Rotary joint; 842. Guide cone; 843. Balance bar; 85. Anti-deformation bar; 86. Friction sleeve. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0018] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0019] Examples, such as Figures 1-11As shown, the present invention provides a grouting device for micro-fractures in mine veins. The ground grouting station includes a central control room 1 and a cement silo 2. The output side of the cement silo 2 is equipped with a screw conveyor 3, a slurry mixer 4, and a grouting pump 5. The supply side of the grouting pump 5 is equipped with a grouting pipe 6. The grouting pipe 6 is wound around a mobile traction device 7. The mobile traction device 7 includes a rotating and retracting frame 71 for rotating and retracting the grouting pipe 6. The pull-out side of the mobile traction device 7 is equipped with a roadway support device 8 that is independent of it. The roadway support device 8 includes a telescopic component 81. The telescopic component 81 is equipped with a pair of through holes 82 for guiding the grouting pipe 6 along the telescopic direction of the telescopic component 81. The front end of the telescopic component 81 is equipped with a traction-type straightening component 83. The traction-type straightening component 83 is used to straighten the front end of the grouting pipe 6 and insert the grouting pipe 6 into the water inrush point. Below the traction-type straightening component 83 is an adaptive balancing frame 84 connected to the telescopic component 81. The adaptive balancing frame 84 is used to support the position near the water inrush point.

[0020] Specifically, the cement silo 2 transports the slurry raw materials to the slurry machine 4 via the screw conveyor 3. The slurry machine 4 prepares the raw materials into grouting material through stirring and centrifugation. The grouting material is then injected into the water inrush cracks via the grouting pump 5 and the grouting pipe 6. Based on this, the present invention uses a mobile traction device 7 to move within the roadway to pull the grouting pipe 6. The grouting pipe 6 is extended and retracted according to its actual usage length. Furthermore, the grouting pipe 6, spirally wound on the rotating retraction frame 71, has a sufficient spiral radius, preventing pipe blockage. This method of rationally managing the grouting pipe 6 within the roadway improves the efficiency of its deployment and retraction, avoids excessive pipe laying on the roadway track, and reduces interference from the grouting pipe 6 to other equipment within the roadway, especially in situations where the grouting pipe 6 needs to be turned back at the preceding or following water inrush points.

[0021] Furthermore, the in-tunnel support device 8 provided by this invention can be mounted on the mobile traction device 7 for transfer. Most importantly, the in-tunnel support device 8 has both support and guiding functions, and can serve as a temporary holding structure for the grouting pipe 6 under a water inrush node. For example, the grouting pipe 6 passes through the expansion joint 81 along the perforation 82. The expansion joint 81 can be quickly adjusted on-site according to the actual length of the water inrush node. After adjustment, the expansion joint 81 contacts the tunnel wall to form a triangular support system. Workers can manually operate the traction-type straightening component 83 on the tunnel floor to guide the grouting pipe 6 through the perforation 82 at the top. The grouting pipe 6 is finely adjusted so that its head is aligned as closely as possible with the grouting hole temporarily drilled by the drilling equipment. After alignment, the grouting pipe 6 is pushed upwards along the insertion direction for a certain distance, so that the grouting pipe 6 is inserted relatively stably inside the water inrush node. At the same time, the head of the roadway support device 8 can be supported on the roadway wall by the adaptive balance frame 84. The staff only need to observe the grout overflow on the roadway ground, without the need to set up scaffolding or bring in a hoist for corresponding operations. This is conducive to improving work efficiency and shortening the rescue cycle of temporary water inrush cracks.

[0022] like Figure 3 , Figure 5 , Figure 8 and Figure 11As shown, the mobile traction device 7 provided by the present invention includes a square chassis frame 72. The bottom of the chassis frame 72 is provided with four evenly distributed casters 73. Each side edge of the chassis frame 72 is provided with a first anti-collision wheel 74. The chassis frame 72 is provided with an annular mounting frame 75. A rotating and unfolding frame 71 is provided on the outside of the mounting frame 75. A support frame 76 is provided on the inside of the mounting frame 75. The top of the support frame 76 is provided with a handrail frame 77 that is parallel to the chassis frame 72. The height distance between the handrail frame 77 and the chassis frame 72 is less than the length and width of the chassis frame 72 and is provided with at least one pair of reinforcing rods 78. Both ends of the handrail frame 77 are provided with second anti-collision wheels 79. The wheel tangents of the second anti-collision wheels 79 and the first anti-collision wheels 74 are located in the same vertical plane. Among them, the second anti-collision wheel 79 has a smaller protective span than the first anti-collision wheel 74, making it suitable for tunnels with arched inner walls, thus providing secondary anti-collision protection. The chassis frame 72 has its actual ground clearance increased by casters 73, which improves its maneuverability within the tunnel. The casters 73 are swivel casters and serve as the primary travel wheels. Manually pushing the handrail frame 77 allows the mobile traction device 7 to carry the grouting pipe 6 for flexible movement within the tunnel. The injection section of the grouting pipe 6 is connected to the pump outlet of the grouting pump 5, and the winding length of the grouting pipe 6 varies with the movement. The traction device 7 and the grouting pump 5 are retracted and extended according to the actual distance between them. The retraction and extension action is realized by the rotating retraction and extension frame 71. The rotating retraction and extension frame 71, the mounting frame 75 and the support base can rotate and move relative to each other. The excess grouting pipe 6 can be retrieved by the rotating retraction and extension frame 71. By flexibly traction and extending the grouting pipe 6, the labor intensity of workers in moving the grouting pipe 6 can be reduced. On the other hand, it avoids the grouting pipe 6 from being laid on the track in the roadway and affecting the operation of other equipment. It also reduces the friction and wear of the grouting pipe 6, which is conducive to extending the actual service life of the grouting pipe 6.

[0023] Furthermore, the first anti-collision wheel 74 can play a collision-prevention role when the caster 73 is used as the first traveling wheel, which helps to ensure the equipment's passability and safety in the roadway. In narrower locations in the roadway, such as roadways that are half-excavated or where locomotives occupy the roadway, the mobile traction device 7 can be changed by 90 degrees, that is, the first anti-collision wheel 74 and the second anti-collision wheel 79 can be used as the second traveling wheels, and the reinforcing rod 78 can be used as the reinforcing structure of the new chassis. In this mode, the equipment's footprint is significantly reduced and the center of gravity is lowered, which helps to improve its passability and balance in the current environment, thereby improving the equipment's efficiency in transferring the grouting pipe 6 in the roadway.

[0024] like Figure 6 and Figure 7As shown, the rotating rack 71 provided by the present invention includes a rotating cylinder 711. The inner wall of the rotating cylinder 711 is provided with a rotating support groove 712 that cooperates with the top support of the mounting frame 75. The top of the rotating cylinder 711 is provided with a plurality of evenly distributed hinges 713. The hinges 713 are provided with downward flipping plate buckles 714. The bottom of the plate buckles 714 is provided with a locking tooth 715. The locking tooth 715 cooperates with an annular locking protrusion 716 provided on the bottom edge of the rotating cylinder 711. The top of the rotating cylinder 711 is provided with four arc-shaped handles 717 that are spaced apart from the hinges 713. The rotating cylinder 711 has an I-shaped structure. Each plate buckle 714 can be locked onto the edge of the annular buckle 716 by flipping, forming a winding space for the grouting pipe 6 with the waist of the rotating cylinder 711. The unit cross-sectional width of the winding space is no more than twice the diameter of the grouting pipe 6. This prevents the grouting pipe 6 from collapsing due to gravity, reducing the probability of pipe blockage and ensuring a longer pre-filled length for grouting. This also helps the grouting material to be effectively injected into the water-bursting cracks under the pressure of the grouting pump 5. The arc-shaped handle 717 serves as a holding structure for driving the rotating cylinder 711 to retract and extend. Its non-electric design reduces the power load of grouting operations in the tunnel and lowers the hardware requirements of the equipment. The rotating support groove 712, which mates with the top surface of the mounting frame 75, serves as one rotating support pair for the rotating cylinder 711. The other rotating support pair is provided by the support frame 76. This prevents the rotating cylinder 711 from experiencing significant end jumps and improves the performance of retracting and extending the grouting pipe 6.

[0025] like Figure 5 , Figure 6 and Figure 7As shown, the support frame 76 provided by the present invention includes a support cylinder 761. The side of the support cylinder 761 is provided with a reinforcing rib 766, which is located on the top surface of the rotating and unfolding frame 71. The top surface of the support cylinder 761 is an inclined surface 762, and the highest level of the inclined surface 762 is used to connect the handrail frame 77. The bottom of the support cylinder 761 is supported and cooperates with the limiting plate 751 provided on the inner wall of the mounting frame 75. The inside of the support cylinder 761 is provided with a connecting cylinder 764 that is connected to the bottom of the mounting frame 75 by vertical bolts. The bottom of the connecting cylinder 764 and the bottom of the mounting frame 75 are both open 752 to avoid cement accumulation in the hollow position of the equipment. Among them, the reinforcing rib 766 can serve as a rotating support pair on the top surface of the rotating take-up and take-down frame 71, forming a clamping effect on the rotating take-up and take-down frame 71 from different directions with the mounting frame 75, which has a stable rotational level and helps to ensure the stability of the grouting pipe 6; the limiting plate 751 is used to provide surface support for the bottom surface of the support cylinder 761, forming a stepped support design with the connecting cylinder 764, which can effectively improve the overall stability and balance of the support frame 76 at the center of the mounting frame 75. Moreover, the support frame 76, the mounting frame 75 and the rotating take-up and take-down frame 71 are all cylindrical designs, which can achieve high... The structure is strong and allows for easy storage of the grouting pipe 6 when not in operation inside the support frame 76, providing temporary storage space. The top surface of the support cylinder 761 is designed with a slope 762, which facilitates the placement of the roadway support device 8 and raises the holding level of the handrail 77, thus improving the efficiency of workers in transferring the equipment. Furthermore, it can lower the overall center of gravity of the equipment when the first anti-collision wheel 74 and the second anti-collision wheel 79 are used as the second traveling wheels, while also providing sufficient wheelbase, which helps to improve the mobility, balance and safety of the equipment in this mode.

[0026] like Figure 5 , Figure 6 and Figure 11 As shown, to improve the space efficiency of this device after switching walking modes, the handrail 77 provided by this invention includes a U-shaped section 771, with a round rod 772 in the middle of the U-shaped section 771. A rotating block 773 is mounted on the round rod 772 and rotates therewith. A Z-shaped handle 774 is mounted on the rotating block 773. A slot 765 is provided near the handrail 77 to engage with the Z-shaped handle 774. In this way, the Z-shaped handle 774 can be rotated 180 degrees around the center of engagement between the round rod 772 and the rotating block 773 and then flipped into the interior of the support cylinder 761. This provides reasonable space for the new chassis, ensuring the device's passability when using the first anti-collision wheel 74 and the second anti-collision wheel 79 as walking wheels. When the Z-shaped handle 774 is extended, its actual height is higher than the maximum height of the support cylinder 761, reaching a level suitable for most people, thereby improving the practicality and utilization rate of this device.

[0027] like Figure 3 and Figure 4 As shown, the telescopic assembly 81 provided by the present invention includes a main board 811 and an adjusting plate 812. The adjusting plate 812 includes a sliding section 8121. The bottom of the sliding section 8121 is provided with a braking bolt 813 connected to the main board 811. Slide sections 8122 are provided on both sides of the sliding section 8121. At the end of the slide section 8122 away from the sliding section 8121, a first support plate section 8123 and a second support plate section 8124 of different lengths are provided. The adjusting plate 812 is provided with two grips 8125 that are staggered vertically with respect to the plate surface of the main board 811. The grips 8125 are in contact with the pipe surface of the grouting pipe 6. The brake bolt 813 includes a bolt body and a rocker arm welded to the end of the bolt head. The clamping degree between the adjusting plate 812 and the main plate 811 can be changed by operating the rocker arm. The adjusting plate 812 can obtain different combination lengths by sliding the sliding section 8121 with the main plate 811. The adjusting plate 812 ensures that the telescopic component 81 has sufficient lateral span through the sliding plate section 8122. At the same time, due to the different specific support points of the first support plate section 8123 and the second support plate section 8124 on the ground in the tunnel, a set of telescopic components 81 has a total of 4 support points, and at least two of them can be supported by the ground in the tunnel. When encountering a structure with stepped positions in the tunnel, such as the step formed by the track and the ground, the first support plate section 8123 and the second support plate section 8124 can be used for support. By building more triangular systems, the stability and reliability of the telescopic component 81 as the main support and guide of the grouting pipe 6 are improved. The handle 8125 serves two purposes: firstly, it can be used as a handhold for adjusting the device and as a handhold for maintaining a stable angle of the auxiliary telescopic component 81 on the ground in the tunnel; secondly, it can protect the grouting pipe 6 passing over the telescopic component 81, preventing the grouting pipe 6 from significantly regressing under non-grouting pressure.

[0028] Since the grouting pipe 6 experiences a certain amount of gravity during the grouting process, to prevent significant backward movement after being lifted to the water inrush node, the main board 811 provided by this invention has multiple anti-deformation rods 85 spaced apart along its length near its front end. The anti-deformation rods 85 are U-shaped with the U-shaped opening facing the insertion path of the grouting pipe 6, and a friction sleeve 86 is provided in the middle of each anti-deformation rod 85. By employing multiple anti-deformation rods 85, multiple limiting protections are provided for the body of the grouting pipe 6, and the friction sleeve 86 increases the resistance to automatic backward movement of the grouting pipe 6, thereby improving the grouting efficiency for water inrush cracks.

[0029] like Figure 4 , Figure 8 and Figure 10As shown, the traction-type straightening assembly 83 provided by the present invention includes a support bearing 831 fixedly disposed at the end of the telescopic assembly 81. A rotating shaft 832 is disposed at the center of the support bearing 831. A swing arm 833 is disposed at one end of the rotating shaft 832 and engages therethrough. Two straightening rods 834 distributed in a V-shape are disposed at both ends of the swing arm 833. A spring 835 is disposed between the support bearing 831 and the swing arm 833. The two ends of the rotating shaft 832 extend at least 15 cm beyond the support bearing 831 and the swing arm 833, respectively. A top bolt 836 and a tail bolt 837 are disposed on the rotating shaft 832 to limit its axial position. An end cap 839 is disposed at the tail end of the rotating shaft 832. A traction rope 838 is disposed through the end cap 839. The portion of the traction rope 838 located inside the end cap 839 is spirally wound with the rotating shaft 832. The traction rope 838 has a spiral structure. Among them, the support bearing 831 is used to reduce the rotational resistance of the rotating shaft 832; the end cap 839 and the rotating shaft 832 can rotate relative to each other within a certain angle, such as by using a rotary joint design; the rotation of the rotating shaft 832 is achieved by the relative change of the winding end and the winding end of the traction rope 838, thereby changing the swing angle of the swing arm 833, so that the actual direction of the grouting pipe 6 led out between the two straightening rods 834 is slightly adjusted, and the actual height of the head end of the grouting pipe 6 can be slightly adjusted by manually operating the traction rope 838 to drive the spring 835 to compress. With the adjustment of the angle of the grouting pipe 6, it is convenient for workers to insert the grouting pipe 6 into the water inrush point on the ground inside the tunnel, without the need to build scaffolding or use lifting equipment.

[0030] Furthermore, the swing arm 833 extending from the front end of the rotating shaft 832 can serve as another clamping structure for the grouting pipe 6, forming a three-dimensional clamping condition with the two straightening rods 834. This avoids the grouting pipe 6 from frequently tilting upwards due to the influence of sudden water before insertion, thereby improving the efficiency of inserting the grouting pipe 6 into the water-surge borehole.

[0031] Because the shape of the tunnel wall varies at different locations and construction stages, especially in the initial, relatively rudimentary and rough stages, in order to ensure that the tunnel support device 8 establishes a triangular support system with the tunnel, such as... Figure 4 , Figure 8 and Figure 10As shown, the adaptive balancing frame 84 provided by the present invention includes a rotary joint 841 disposed on the bottom front end of the telescopic component 81. A guide cone 842 is disposed at the bottom of the rotary joint 841. The guide cone 842 includes a cylindrical section and a conical section. At least four radially distributed connecting holes are disposed on the side of the cylindrical section. A balance bar 843 is disposed in the connecting holes. The lengths of the balance bars 843 in all the connecting holes are different, and the length of the smallest balance bar 843 is at least greater than the distance between the center of the rotary joint and the front end of the traction-type straightening component 83. The rotary joint 841 provides the hardware conditions for relative rotation between the adaptive balancing frame 84 and the telescopic component 81. When the roadway support device 8 is placed on the inner wall of the roadway, the balancing rods 843 that actually participate in the support can rotate and replace according to the on-site support environment until a more stable support foundation is obtained. For grouting operations carried out after a water inrush, the adaptive balancing frame 84 can float within a certain support range under the action of external forces to avoid the maximum pressure and impact. For the grouting pipe 6 inserted into the water inrush crack, it is only necessary to ensure sufficient insertion length to continue the operation. The guide cone 842 at the center of the adaptive balancing frame 84 can guide the water inrush and overflowing cement slurry, and provide guiding force for the replacement of the balancing rods 843, so that the adaptive balancing frame 84 can automatically avoid the position with greater impact. The entire roadway support device 8 and the roadway can establish a relatively stable support system.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A grouting device for micro-fractures in mine veins, comprising a ground grouting station, the ground grouting station including a central control room and a cement silo, wherein a screw conveyor, a slurry mixer, and a grouting pump are provided on the output side of the cement silo, and a grouting pipe is provided on the supply side of the grouting pump, characterized in that, The grouting pipe is wound around a mobile traction device, which includes a rotating and retracting frame for rotating and retracting the grouting pipe. An independent roadway support device is provided on the pull-out side of the mobile traction device. The roadway support device includes a telescopic assembly with a pair of through holes for guiding the grouting pipe along the telescopic direction. A traction-type straightening assembly is provided at the front end of the telescopic assembly to straighten the front end of the grouting pipe and insert it into the water inrush point. An adaptive balancing frame connected to the telescopic assembly is provided below the traction-type straightening assembly to provide support near the water inrush point.

2. The grouting equipment for micro-fractures in mine veins according to claim 1, characterized in that, The mobile traction device includes a square chassis frame with four evenly distributed casters at the bottom. Each side edge of the chassis frame is equipped with a first anti-collision wheel. A ring-shaped mounting frame is mounted on the chassis frame. A rotating and retractable frame is located on the outside of the mounting frame. A support frame is located on the inside of the mounting frame. A handrail is located on the top of the support frame, parallel to the chassis frame. The height distance between the handrail and the chassis frame is less than the length and width of the chassis frame, and at least one pair of reinforcing bars are provided. Second anti-collision wheels are provided at both ends of the handrail, and the wheel tangents of the second and first anti-collision wheels are located in the same vertical plane.

3. The grouting equipment for micro-fractures in mine veins according to claim 2, characterized in that, The rotating rack includes a rotating cylinder. The inner wall of the rotating cylinder is provided with a rotating support groove that cooperates with the top support of the mounting frame. The top of the rotating cylinder is provided with multiple evenly distributed hinges. The hinges are provided with downward-flipping plate buckles. The bottom of the plate buckles is provided with locking teeth. The locking teeth cooperate with the annular locking protrusions provided on the bottom edge of the rotating cylinder. The top of the rotating cylinder is provided with four arc-shaped handles that are spaced apart from the hinges.

4. The grouting equipment for micro-fractures in mine veins according to claim 3, characterized in that, The support frame includes a support cylinder with reinforcing ribs on its side. The reinforcing ribs are located on the top surface of the rotating and unfolding frame. The top surface of the support cylinder is inclined, and the highest horizontal part of the inclined surface is used to connect the handrail frame. The bottom of the support cylinder is supported and cooperates with a limiting plate provided on the inner wall of the mounting frame. The inside of the support cylinder is provided with a connecting cylinder that is connected to the bottom of the mounting frame by vertical bolts. The bottom of the connecting cylinder and the bottom of the mounting frame are both open.

5. A grouting device for micro-fractures in mine veins according to claim 4, characterized in that, The handrail includes a U-shaped section, with a round rod in the middle of the U-shaped section. A rotating block is provided on the round rod to rotate with it. A Z-shaped handle is provided on the rotating block. The support frame has a slot near the handrail to engage with the Z-shaped handle.

6. A grouting device for microfractures in mine veins according to any one of claims 1 to 5, characterized in that, The telescopic assembly includes a main board and an adjusting plate. The adjusting plate includes a sliding section, the bottom of which is provided with a braking bolt for connecting to the main board. Slide sections are provided on both sides of the sliding section. At the end of the slide section away from the sliding section, there are first and second support sections of different lengths. The adjusting plate is provided with two grips that are staggered vertically on the surface of the main board. The grips are in contact with the surface of the grouting pipe.

7. A grouting device for micro-fractures in mine veins according to claim 6, characterized in that, The main board has multiple anti-deformation rods spaced apart along its length near its front end. The anti-deformation rods are U-shaped with the U-shaped opening facing the grouting pipe's insertion path, and a friction sleeve is provided in the middle of the anti-deformation rod.

8. A grouting device for micro-fractures in mine veins according to claim 1, characterized in that, The traction-type straightening assembly includes a support bearing fixedly mounted at the end of the telescopic assembly. A rotating shaft is located at the center of the support bearing. A swing arm is mounted at one end of the rotating shaft and engages with it. Two straightening rods arranged in a V-shape are mounted at both ends of the swing arm. A spring is installed between the support bearing and the swing arm. Both ends of the rotating shaft extend at least 15 cm beyond the support bearing and the swing arm, respectively. A top bolt and a tail bolt are mounted on the rotating shaft to limit its axial position. An end cap is mounted at the tail end of the rotating shaft. A traction rope is threaded through the end cap. The portion of the traction rope inside the end cap is spirally wound with the rotating shaft. The traction rope has a loop-shaped structure.

9. A grouting device for micro-fractures in mine veins according to claim 1, characterized in that, The adaptive balancing frame includes a rotary joint disposed on the bottom front end of the telescopic assembly. A guide cone is disposed at the bottom of the rotary joint. The guide cone includes a cylindrical section and a conical section. At least four radially distributed connection holes are disposed on the side of the cylindrical section. A balance bar is disposed in each connection hole. The length of the balance bar in all connection holes is different, and the length of the smallest balance bar is at least greater than the distance between the center of the rotary joint and the front end of the traction-type straightening assembly.

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