Grouting device for mine geological disaster control

Abstract

The utility model relates to the technical field of grouting devices, in particular to a grouting device for mine geological disaster control, which comprises a moving box, a stirring tank, an overturning component, a main pipe and grouting branch pipes. Through cooperative work of the multiple sets of grouting branch pipes and the liquid flowing pipe, segmented grouting of fractures of different depths is achieved, the problem of uneven slurry distribution caused by a traditional single-pipe single-cavity structure is solved, and the reinforcing uniformity is improved; a detection module and a hydraulic sensor are integrated, the slurry diffusion range and rock mass stress changes are monitored in real time, data are transmitted in combination with a wireless module, grouting parameters are dynamically adjusted, and blind areas or overfilling is reduced; a rotating rod and a crushing blade are arranged in the stirring tank to ensure uniform mixing of the slurry; a spring rubber damper is arranged in the elastic conveying pipe, high-pressure grouting impact is buffered, the pipeline stability is guaranteed, and the overturning assembly adjusts the angle of the main pipe and the grouting branch pipe through a driving motor to adapt to cracks with different inclination angles; and the impact resistance in a complex stratum is enhanced through the design of the anti-collision rod and the spraying ball.

Description

TECHNICAL FIELD

[0001] The utility model relates to grouting device technical field especially for mine geological disaster management's grouting device. BACKGROUND

[0002] Mine geological disaster management refers to geological disasters caused in the process of mining, using geological engineering technology (such as filling reclamation, support method, closure method, etc.), changing the disaster occurrence process, preventing or reducing the disaster impact, by injecting specific slurry (such as cement slurry, chemical slurry, etc.) into mine rock-soil mass (such as fissure, fracture zone, goaf, etc.), using the filling, cementation and hardening effect of slurry to improve the mechanical properties of rock-soil mass, thereby preventing and controlling landslide, collapse, water inrush and other geological disasters.

[0003] The traditional grouting device injects slurry into mine rock fissure or goaf through a high-pressure pump, fills the gap and solidifies to enhance the stability of rock mass, and one-time grouting of the whole drill hole is realized by single-pipe single-cavity structure, which cannot realize accurate layered grouting for different depth fissures, causes uneven distribution of slurry, relies on manual experience to judge slurry diffusion range, and is prone to grouting blind area or overfilling, thereby reducing the overall grouting effect. UTILITY MODEL CONTENT

[0004] In order to overcome the problem that the grouting device cannot realize accurate layered grouting for different depth fissures by one-time grouting of the whole drill hole through single-pipe single-cavity structure, causes uneven distribution of slurry, relies on manual experience to judge slurry diffusion range, and is prone to grouting blind area or overfilling, the utility model provides a grouting device for mine geological disaster management.

[0005] The technical scheme is as follows: a grouting device for mine geological disaster management, comprising a moving box, a stirring tank, a turnover assembly, a main pipe and a grouting branch pipe; the moving box is used to drive the whole stable movement operation, the moving box is internally provided with a stirring tank used to store slurry for batching and stirring, the moving box is provided with a turnover assembly used to drive the main pipe and the grouting branch pipe to turn over at an angle suitable for grouting of geological fissures, the turnover assembly is provided with a main pipe connected with the grouting branch pipe to keep stable communication with the stirring tank for conveying slurry, and the outer end of the main pipe is annularly connected with a plurality of groups of grouting branch pipes used for segmented grouting.

[0006] Further, two groups of connecting shafts are linearly arranged at the bottom of the moving box, rollers are sleeved at both ends of the connecting shafts, an observation screen is arranged at the middle part of the moving box, a temperature insulation sleeve is wrapped on the moving box, and a storage space for storing the stirring tank is formed in the center of the moving box.

[0007] Further, an electromagnetic valve is connected to the side end of the stirring tank, an elastic conveying pipe extending to the main pipe is arranged at the center of the electromagnetic valve, a spring rubber damper is arranged in the elastic conveying pipe, a cover plate is detachably arranged on the stirring tank, and a filling pipe is fixedly connected to the cover plate.

[0008] Further, the center of the cover plate is provided with a rotating rod, the outer end of the rotating rod is provided with a plurality of groups of stirring rods from bottom to top in a ring shape, one end of the rotating rod is connected with a first driving motor, and the first driving motor drives the rotating rod to drive the stirring rods to rotate.

[0009] Further, the overturning assembly comprises a fixing rod, a rotating sleeve and a sleeve plate, the outer end of the fixing rod is sleeved with the rotating sleeve, the end of the sleeve plate is symmetrically connected with extension guards, a turning shaft sleeve is arranged between the two groups of extension guards, the turning shaft sleeve is provided with a sleeve for mounting the main pipe in the center, one end of the turning shaft sleeve is connected with a third driving motor, and the third driving motor drives the turning shaft sleeve to drive the main pipe to turn.

[0010] Further, the center of the rotating sleeve is fixedly connected with the sleeve plate, a second driving motor is arranged between the sleeve plate and the rotating sleeve, the second driving motor drives the sleeve plate to rotate through the rotating sleeve, the fixing rod is fixedly connected with a spring column, one end of the spring column away from the fixing rod is connected with a pressure bearing shaft, both ends of the pressure bearing shaft are sleeved with support wheels, and the inside of the spring column is provided with a spring rubber damper.

[0011] Further, the center of the main pipe is provided with a liquid flow pipe in communication with the elastic conveying pipe and the grouting branch pipe, one end of the main pipe is connected with a detection module, the end of the detection module is fixedly connected with a mounting clamp for mounting the protective cover and the drill bit, and the inside of the detection module is provided with a liquid injection pump, an ultrasonic transmitter, a wireless module, a lithium battery module and an ultrasonic receiver which are electrically connected with each other, and the other end of the main pipe is connected with a rotating ring, one end of the rotating ring away from the main pipe is connected with a fourth driving motor, and the fourth driving motor drives the rotating ring to drive the main pipe to turn.

[0012] Further, the center of the grouting branch pipe is provided with a stirring module, the stirring module comprises a lithium battery module, a mixing rod and a crushing blade, the outer end of the mixing rod is provided with a plurality of groups of crushing blades in a ring shape, the lithium battery module drives the mixing rod to drive the crushing blades to rotate, one end of the grouting branch pipe is provided with a hydraulic sensor, a plurality of groups of one-way conveying valves in communication with the liquid flow pipe are linearly connected on the grouting branch pipe, a sealing ring is arranged between the hydraulic sensor and the grouting branch pipe, a plurality of groups of anti-collision rods are arranged on the outer end of the grouting branch pipe in a ring shape, a plurality of groups of spray balls are linearly arranged between the two groups of anti-collision rods on the grouting branch pipe, a spray hole is formed in the spray ball, and a sprayer is arranged in the inside of the spray ball.

[0013] The beneficial effects are that the utility model realizes the collaborative work of the multiple groups of grouting branch pipes and liquid flow pipes, realizes the sectional grouting of different depth fissures, avoids the uneven distribution of slurry caused by the traditional single-pipe single-cavity structure, and improves the reinforcement uniformity.

[0014] The integrated detection module and hydraulic sensor can realize real-time monitoring of the slurry diffusion range and the rock mass stress change, the wireless module can transmit data, the grouting parameters can be dynamically adjusted, and the blind area or excessive filling can be reduced.

[0015] The stirring tank is provided with a rotating rod and a crushing blade to ensure uniform mixing of the slurry; the elastic conveying pipe is provided with spring rubber damping to buffer the impact of high-pressure grouting and ensure the stability of the pipeline; the turnover assembly adjusts the angle between the main pipe and the grouting branch pipe through a driving motor to adapt to cracks with different inclination angles; and the anti-collision rod and the spray ball are designed to enhance the impact resistance in complex strata. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic view of the grouting device for mine geological disaster control of the utility model;

[0017] Figure 2 It is a schematic view of the mobile box of the utility model;

[0018] Figure 3 It is an explosion schematic view of the stirring tank of the utility model;

[0019] Figure 4 It is a schematic view of the turnover assembly and the main pipe of the utility model;

[0020] Figure 5 It is a schematic view of the grouting branch pipe of the utility model.

[0021] In the drawing mark: 1, mobile box; 2, stirring tank; 3, turnover assembly; 4, main pipe; 5, grouting branch pipe; 101, observation screen; 102, connecting shaft; 103, roller; 104, temperature insulation sleeve; 201, cover plate; 202, electromagnetic valve; 203, elastic conveying pipe; 204, filling pipe; 205, first driving motor; 206, rotating rod; 207, stirring rod; 301, fixed rod; 302, rotating sleeve; 303, sleeve plate; 304, second driving motor; 305, spring column; 306, pressure bearing shaft; 307, supporting wheel; 308, extension guard plate; 309, sleeve; 310, steering shaft sleeve; 311, third driving motor; 401, detection module; 402, mounting clamping sleeve; 403, fourth driving motor; 501, one-way delivery valve; 502, stirring module; 503, sealing ring; 504, hydraulic sensor; 505, spray ball; 506, anti-collision rod; 507, spray hole. DETAILED DESCRIPTION

[0022] The utility model will be specifically introduced in combination with the drawings and specific embodiments.

[0023] Mine geological disaster refers to the disaster caused by the destruction of the balance of geological environment due to mining activities, mainly including ground subsidence, landslide, water inrush, ground fissure, etc. China has a long history of mineral resources development, but the early technology is backward, leading to the deterioration of mine geological environment and frequent disasters. For example, the goaf collapse is particularly serious in the northern coalfield area, and the roof thickness of some areas is less than 1 meter, which is prone to collapse due to blasting or vibration.

[0024] By construction stage:

[0025] Pre-grouting: Reinforce aquifers or fracture zones before excavation to prevent disasters like water inrush or collapse.

[0026] Post-grouting: Used for repair after disasters occur, such as goaf filling or crack sealing.

[0027] By grout type:

[0028] Cement grouting: Low cost, suitable for large fissures or loose formations.

[0029] Chemical grouting: Strong permeability, suitable for fine-grained formations or impermeable projects.

[0030] By process:

[0031] Static pressure grouting: Suitable for filling fissures or loose soil.

[0032] High-pressure jet grouting: Used to reinforce weak foundations or fractured rock mass.

[0033] Effects

[0034] Disaster prevention:

[0035] Control collapse: Fill goaf or rock mass fissure to prevent surface subsidence.

[0036] Water plugging: Seal groundwater channels to avoid water inrush accidents (such as mine water leakage).

[0037] Enhance stability:

[0038] Improve the shear strength of rock-soil mass and reduce landslide risk.

[0039] Strengthen the surrounding rock of the roadway to ensure the safety of underground operations.

[0040] Economic and environmental benefits:

[0041] Compared with demolition and reconstruction, grouting has lower cost and shorter construction period.

[0042] Prepare grout from waste (such as slag) to achieve resource utilization.

[0043] Synergistic governance:

[0044] Combine monitoring technology (such as ground penetrating radar) to adjust grouting parameters in real time and avoid secondary disasters.

[0045] Typical cases

[0046] Mountain slope protection and reinforcement: Repair landslide fissures through grouting to restore slope stability.

[0047] Mine water plugging: Pre-grouting to cut off aquifers to ensure safe tunneling (such as Shandong Feicheng Mine).

[0048] Note: Treatment needs to choose slurry and process according to geological conditions, and strictly monitor the grouting pressure and diffusion range to prevent excessive uplift or slurry loss

[0049] Traditional grouting treatment technology and limitations

[0050] Technical principle:

[0051] Through the grouting pump, the slurry (cement slurry, chemical slurry, etc.) is injected into the rock mass crack or goaf under high pressure, filling the gap and solidifying to enhance the stability of the rock mass. Traditional methods include:

[0052] Filling reclamation method: using coal gangue and other materials to backfill the collapse area, with the functions of waste treatment and ecological restoration.

[0053] Support method: supporting the goaf with pillars or supports to prevent roof collapse.

[0054] Sealing method: sealing and isolating small goafs to reduce the impact.

[0055] Technical defects:

[0056] Single tube single cavity structure: traditional grouting device can only fill the entire borehole at one time, and cannot perform layered grouting, resulting in uneven distribution of slurry.

[0057] Insufficient sealing: relying on rubber stopper, which is easy to fail in broken strata, causing slurry leakage.

[0058] Intelligent missing: grouting parameters rely on manual experience adjustment, which is easy to appear blind area or overfilling.

[0059] Technical evolution needs of grouting device

[0060] Layered grouting needs:

[0061] Different depths of cracks require differential grouting, and traditional devices are difficult to achieve precise control. For example, shallow cracks require low viscosity slurry for rapid penetration, and deep cracks require high strength slurry for long-term stability.

[0062] Dynamic monitoring needs:

[0063] Complex mine geological conditions (such as water inrush, rock burst), need to monitor the slurry diffusion range and rock mass stress change in real time.

[0064] Balance between environmental protection and efficiency:

[0065] Traditional slurry (such as pure cement slurry) has high cost and pollutes groundwater, and needs to develop environmentally friendly materials (such as slag-based slurry).

[0066] Application of environmentally friendly materials:

[0067] Slag-MICP slurry: Using the technology of microbial-induced carbonate precipitation, solidify waste slag into high-strength slurry, reduce environmental load.

[0068] Technical application and benefits

[0069] Typical cases:

[0070] Deep water plugging project: A coal mine uses intelligent grouting device, segmented plugging water channel, slurry utilization rate increased to 90%.

[0071] Slope reinforcement: Repair landslide fissure by high-pressure grouting, rock mass compressive strength increased by 30%.

[0072] Comprehensive benefits:

[0073] Economic: Slag slurry reduces material cost by more than 20%.

[0074] Safety: Intelligent monitoring reduces grouting blind area by 70%.

[0075] Future development direction

[0076] Intelligent deep integration: Develop 5G remote control system to realize unmanned grouting operation.

[0077] Green technology promotion: Promote microbial solidification, nano material grouting and other low-carbon technologies.

[0078] As shown in Figures 1-5 , a grouting device for mine geological disaster control, comprising a mobile box 1, a stirring tank 2, a turnover assembly 3, a main pipe 4 and a grouting branch pipe 5; the mobile box 1 is used to drive the overall stable movement operation, the mobile box 1 is internally provided with the stirring tank 2 used for storing slurry for batching and stirring, the mobile box 1 is provided with the turnover assembly 3 used for driving the main pipe 4 and the grouting branch pipe 5 to turn over the angle to adapt to the geological cracks for grouting, the turnover assembly 3 is provided with the main pipe 4 connected with the grouting branch pipe 5 to keep stable communication with the stirring tank 2 for conveying slurry, and the outer end of the main pipe 4 is circumferentially communicated with a plurality of groups of grouting branch pipes 5 for sectional grouting.

[0079] Please refer to Figures 2-4 , in this embodiment, the bottom of the mobile box 1 is linearly provided with two groups of connecting shafts 102, both ends of the connecting shaft 102 are sleeved with rollers 103, the middle part of the mobile box 1 is provided with an observation screen 101, the mobile box 1 is covered with a temperature insulation sleeve 104, a storage space for storing the stirring tank 2 is formed in the center of the mobile box 1, the side end of the stirring tank 2 is connected with an electromagnetic valve 202, the center of the electromagnetic valve 202 is provided with an elastic conveying pipe 203 extending and communicating with the main pipe 4, the inside of the elastic conveying pipe 203 is provided with a spring rubber damper, the stirring tank 2 is provided with a cover plate 201, and the cover plate 201 is provided with a filling pipe 204.

[0080] Please refer toFigures 3-4 In the embodiment, the center of the cover plate 201 is provided with a rotating rod 206, the outer end of the rotating rod 206 is provided with a plurality of groups of stirring rods 207 from bottom to top, one end of the rotating rod 206 is connected with a first driving motor 205, the first driving motor 205 drives the rotating rod 206 to drive the stirring rod 207 to rotate, the overturning assembly 3 comprises a fixed rod 301, a rotating sleeve 302 and a sleeve plate 303, the outer end of the fixed rod 301 is sleeved with the rotating sleeve 302, the end of the sleeve plate 303 is symmetrically connected with an extension guard plate 308, a steering shaft sleeve 310 is provided between the two groups of extension guard plates 308, the center of the steering shaft sleeve 310 is provided with a sleeve 309 for mounting the main pipe 4, one end of the steering shaft sleeve 310 is connected with a third driving motor 311, the third driving motor 311 drives the steering shaft sleeve 310 to drive the main pipe 4 to steer.

[0081] Please refer to Figures 4-5 In the embodiment, the center of the rotating sleeve 302 is fixedly connected with the sleeve plate 303, the second driving motor 304 is arranged between the sleeve plate 303 and the rotating sleeve 302, the second driving motor 304 drives the sleeve plate 303 to rotate through the rotating sleeve 302, the fixed rod 301 is fixedly connected with a spring column 305, one end of the spring column 305 away from the fixed rod 301 is connected with a pressure bearing shaft 306, both ends of the pressure bearing shaft 306 are sleeved with support wheels 307, the inside of the spring column 305 is provided with a spring rubber damper, the center of the main pipe 4 is provided with a flow pipe in communication with the elastic conveying pipe 203 and the grouting branch pipe 5, one end of the main pipe 4 is connected with a detection module 401, the end of the detection module 401 is fixedly connected with a mounting clamp sleeve 402 for mounting a protective cover and a drill bit, the inside of the detection module 401 is provided with a liquid injection pump, an ultrasonic transmitter, a wireless module, a lithium battery module and an ultrasonic receiver which are electrically connected with each other, the other end of the main pipe 4 is connected with a rotating ring, one end of the rotating ring away from the main pipe 4 is connected with a fourth driving motor 403, the fourth driving motor 403 drives the rotating ring to drive the main pipe 4 to steer, the center of the grouting branch pipe 5 is provided with a stirring module 502, the stirring module 502 comprises a lithium battery module, a mixing rod and a crushing blade, the outer end of the mixing rod is circumferentially provided with a plurality of groups of crushing blades, the lithium battery module drives the mixing rod to drive the crushing blades to rotate, one end of the grouting branch pipe 5 is provided with a hydraulic sensor 504, a plurality of groups of one-way conveying valves 501 in communication with the flow pipe are linearly connected on the grouting branch pipe 5, a sealing ring 503 is arranged between the hydraulic sensor 504 and the grouting branch pipe 5, a plurality of groups of anti-collision rods 506 are circumferentially arranged on the outer end of the grouting branch pipe 5, a plurality of groups of spray balls 505 are linearly arranged on the grouting branch pipe 5 between the two groups of anti-collision rods 506, a spray hole 507 is formed on the spray ball 505, and a sprayer is arranged in the inside of the spray ball 505.

[0082] The first driving motor 205 drives the rotating rod 206 and the stirring rod 207 to rotate, and the raw materials (such as cement, slag) input by the filling pipe 204 are mixed into uniform slurry in the stirring tank 2;

[0083] The electromagnetic valve 202 adjusts the opening and closing of the elastic delivery pipe 203 according to the grouting demand, the slurry is distributed to each grouting branch pipe 5 through the liquid flow pipe, and the one-way delivery valve 501 prevents backflow;

[0084] The spray ball 505 at the end of the grouting branch pipe 5 sprays the slurry through the spray hole 507, the crushing blade of the stirring module 502 further crushes the slurry particles, and the permeability is improved; the hydraulic sensor 504 (model PTJ500) feeds back pressure data in real time, adjusts the grouting speed, the ultrasonic transmitter (model US-100) and the receiver of the detection module 401 scan the rock mass crack, the wireless module (model HC-12) transmits data to the control terminal, generates a grouting path three-dimensional model, the third driving motor 311 adjusts the inclination angle of the main pipe 4 through the steering shaft sleeve 310 to adapt to the crack trend; the spring column 305 and the pressure bearing shaft 306 buffer the drilling vibration, the supporting wheel 307 enhances the moving stability, the sealing ring 503 and the anti-collision rod 506 reduce the wear of the grouting branch pipe 5, the temperature insulation sleeve 104 maintains the temperature of the stirring tank 2, and premature solidification of the slurry is avoided.

[0085] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A grouting device for mine geological disaster treatment, comprising a moving box (1), characterized in that: Also include the stirring tank (2), turnover assembly (3), main pipe (4) and grouting branch pipe (5); for driving the whole stable movement operation of mobile box (1), mobile box (1) inside is equipped with for storing slurry for dosing stirring tank (2), mobile box (1) is equipped with for driving main pipe (4) and grouting branch pipe (5) turnover angle adaptation geologic fracture grouting turnover assembly (3), turnover assembly (3) is equipped with connecting grouting branch pipe (5) keeps stable communication stirring tank (2) main pipe (4) for conveying slurry, main pipe (4) outer end annular communication has several groups of grouting branch pipe (5) for sectional grouting.

2. The grouting device for mine geological disaster treatment according to claim 1, characterized in that, The bottom of the mobile box (1) is linearly provided with two groups of connecting shafts (102), both ends of the connecting shaft (102) are sleeved with rollers (103), the middle of the mobile box (1) is provided with an observation screen (101), the mobile box (1) is covered with a temperature insulation sleeve (104), and the center of the mobile box (1) is provided with a storage space for storing the stirring tank (2).

3. The grouting device for mine geological disaster treatment according to claim 1, characterized in that, The side end of the stirring tank (2) is connected with a solenoid valve (202), the center of the solenoid valve (202) is provided with an elastic conveying pipe (203) extending and communicating to the main pipe (4), the inside of the elastic conveying pipe (203) is provided with a spring rubber damper, the stirring tank (2) is provided with a cover plate (201) buckled thereon, and the cover plate (201) is fixedly connected with a filling pipe (204).

4. The grouting device for mine geological disaster treatment according to claim 3, characterized in that, The center of the cover plate (201) is provided with a rotating rod (206), the outer end of the rotating rod (206) is annularly provided with a plurality of stirring rods (207) from bottom to top, one end of the rotating rod (206) is connected with a first driving motor (205), and the first driving motor (205) drives the rotating rod (206) to rotate the stirring rod (207).

5. The grouting device for mine geological disaster treatment according to claim 1, characterized in that, The turnover assembly (3) comprises a fixed rod (301), a rotating sleeve (302) and a sleeve plate (303), the outer end of the fixed rod (301) is sleeved with the rotating sleeve (302), the end portion of the sleeve plate (303) is symmetrically connected with an extension guard plate (308), the extension guard plates (308) are provided with a steering shaft sleeve (310) penetrating therebetween, the steering shaft sleeve (310) is provided with a sleeve (309) for mounting the main pipe (4) in the center, one end of the steering shaft sleeve (310) is connected with a third driving motor (311), and the third driving motor (311) drives the steering shaft sleeve (310) to drive the main pipe (4) to steer.

6. The grouting device for mine geological disaster treatment according to claim 5, characterized in that, The center of the rotating sleeve (302) is fixedly connected with the sleeve plate (303), the second driving motor (304) is arranged between the sleeve plate (303) and the rotating sleeve (302), the second driving motor (304) drives the sleeve plate (303) to rotate through the rotating sleeve (302), the fixed rod (301) is fixedly connected with a spring column (305), one end of the spring column (305) away from the fixed rod (301) is connected with a pressure bearing shaft (306), both ends of the pressure bearing shaft (306) are sleeved with support wheels (307), and the inside of the spring column (305) is provided with a spring rubber damper.

7. The grouting device for mine geological disaster treatment according to claim 3, characterized in that, The center of the main pipe (4) is provided with a flow pipe in communication with the elastic conveying pipe (203) and the grouting branch pipe (5), one end of the main pipe (4) is connected with a detection module (401), the end of the detection module (401) is fixedly connected with a mounting sleeve (402) provided with a mounting protective cover and a drill bit, the inside of the detection module (401) is provided with a liquid injection pump, an ultrasonic transmitter, a wireless module, a lithium battery module and an ultrasonic receiver which are electrically connected with each other, the other end of the main pipe (4) is connected with a rotating ring, the end of the rotating ring away from the main pipe (4) is connected with a fourth driving motor (403), the fourth driving motor (403) drives the rotating ring to drive the main pipe (4) to turn.

8. The grouting device for mine geological disaster treatment according to claim 7, characterized in that, The center of the grouting branch pipe (5) is provided with a stirring module (502), the stirring module (502) comprises a lithium battery module, a mixing rod and a crushing blade, a plurality of groups of crushing blades are arranged on the outer end of the mixing rod in a ring shape, the lithium battery module drives the mixing rod to rotate the crushing blades, one end of the grouting branch pipe (5) is provided with a hydraulic sensor (504), a plurality of groups of one-way conveying valves (501) in communication with the flow pipe are linearly connected on the grouting branch pipe (5), a sealing ring (503) is arranged between the hydraulic sensor (504) and the grouting branch pipe (5), a plurality of groups of anti-collision rods (506) are arranged on the outer end of the grouting branch pipe (5) in a ring shape, a plurality of groups of spray balls (505) are linearly arranged between two groups of anti-collision rods (506) on the grouting branch pipe (5), a spray hole (507) is formed in the spray ball (505), and a sprayer is arranged in the spray ball (505).

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