A tunnel gushing mud disaster source drilling and grouting integrated device and method

Abstract

The application discloses a tunnel gushing water and mud burst disaster source drilling and injection integrated device and method, and overcomes the technical bottleneck of long-distance treatment of the tunnel gushing water and mud burst disaster source.The tunnel gushing water and mud burst disaster source drilling and injection integrated device and method have the obvious advantage of long detection distance, and effectively detect and treat a farther distance based on directional long drilling for disaster source advanced treatment.The tunnel gushing water and mud burst disaster source drilling and injection integrated device and method complete directional drilling construction, disaster source while-drilling detection, disaster source while-drilling treatment and grouting effect evaluation in the directional drilling process, realize drilling, detection, grouting and evaluation in one drilling, significantly improve the tunnel gushing water and mud burst disaster source treatment efficiency, and are suitable for large-scale use and popularization in industry.

Description

Technical Field

[0001] This invention belongs to the field of tunnel disaster management, specifically relating to an integrated drilling and injection device and method for tunnel water inrush and mudslide disaster sources. Background Technology

[0002] Tunnel water inrush and mud inrush refer to the phenomenon where, during the construction of tunnels and underground engineering projects, the excavation activities disrupt the original geological structure and hydraulic balance, resulting in a sudden influx of large amounts of groundwater or muddy water mixtures into the tunnel. It is characterized by its suddenness and high destructiveness, posing a significant threat to tunnel construction, operation, and personnel. Currently, the main methods for controlling tunnel water inrush and mud inrush disasters are geophysical exploration first, drilling verification, and grouting treatment.

[0003] Among them, "geophysical exploration first" usually uses transient electromagnetic, ground-penetrating radar or high-density electrical resistivity tomography methods to predict geological anomalies in the tunnel; "drilling verification" is to explore and verify the geological anomalies predicted by geophysical exploration methods in the tunnel; "grouting treatment" is to withdraw the drill after drilling verification and lower a special grouting drill set to grout and seal the disaster source.

[0004] The above methods have some problems. Existing technologies and devices for controlling water inrush and mud inrush disasters in tunnels mainly rely on in-tunnel detection and short-bore drilling, which have short detection distances. In addition, the drilling, detection and grouting processes are separated, making it impossible to detect and control water inrush and mud inrush disasters in tunnels in one trip, resulting in low operational efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated drilling and injection device and method for tunnel water inrush and mudslide disaster source control, so as to solve the problems of short detection distance and low operation efficiency in the existing technology for tunnel water inrush and mudslide disaster source control.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An integrated drilling and grouting device for tunnel water inrush and mudslide disaster sources includes a pump truck and a directional drilling rig. The pump truck is equipped with a grouting device and a controller. The drilling power unit is connected to the rear of the drill rod, and the output end of the grouting device is connected to the rear end of the drill rod.

[0008] The drill rod is mounted on the directional drilling rig in the middle; the front part of the drill rod is provided with, from back to front, a grouting packer, a drilling grouting switching sub, a drilling detection sub, and a forced directional screw drill bit; the front end of the drill rod is provided with a directional drill bit.

[0009] The grouting packer includes a packer sleeve mounted on the drill pipe. A through grouting packer groove is formed in the wall of the packer sleeve. An elastic packer is fixedly fitted on the outside of the packer sleeve, and the elastic packer covers the grouting packer groove. A servo electric cylinder is installed inside the shell of the packer sleeve. The output shaft of the servo electric cylinder is coaxially and fixedly connected to the valve stem. The servo electric cylinder can drive the valve stem to extend or retract from the side of the grouting packer groove, thereby causing the valve stem to block or leave the grouting packer groove.

[0010] The packer sleeve is also equipped with a pressure sensor and a pull wire sensor inside the housing; the pressure sensor is used to detect the liquid pressure inside the packer sleeve, and the pull wire sensor is used to detect the displacement of the elastic packer.

[0011] The drilling and grouting dual-purpose pump truck, directional drilling rig, pressure sensor, wire sensor, drilling and grouting switching sub, drilling and detection sub, and forced directional screw drill bit are all electrically connected to the controller.

[0012] The present invention also has the following features:

[0013] Furthermore, the drilling grouting switching sub includes a sub housing, multiple grouting nozzles, and a sealing assembly;

[0014] The inner wall of the short section housing has multiple grouting nozzle mounting holes, and the bottom of each grouting nozzle mounting hole has a through groove. Each grouting nozzle is installed inside a corresponding grouting nozzle mounting hole. A first compression spring is fitted onto each grouting nozzle. One end of the first compression spring is fixedly connected to the bottom of the grouting nozzle mounting hole, and the other end is fixedly connected to the grouting nozzle. When the first compression spring is compressed, the grouting nozzle can extend out of the short section housing through the through groove.

[0015] The sealing assembly includes a piston, which is coaxially and fixedly connected to a piston rod. A second compression spring is sleeved on the piston rod, and one end of the second compression spring is fixedly connected to the piston.

[0016] The inner diameter of the front part of the short section housing increases from front to back, forming two annular first and second sealing platforms; the other end of the second compression spring is fixedly connected to the first sealing platform.

[0017] When the second compression spring is in its natural state, the piston does not contact the second sealing platform; when the second compression spring is compressed, the piston can seal the annular zone in the middle of the second sealing platform.

[0018] Furthermore, the aforementioned detection-while-drilling sub includes a transmission module, a power supply module, an electromagnetic detection module, and a trajectory measurement module;

[0019] The transmission module is used to transmit the current drilling detection data of the drilling detection section to the borehole opening via wireless mud pulses or electromagnetic waves.

[0020] The power supply module is equipped with a rechargeable battery pack to power the transmission module, electromagnetic detection module and trajectory measurement module;

[0021] The electromagnetic detection module includes a transmitting coil and a receiving coil. The transmitting coil is used to transmit a primary pulse magnetic field into the surrounding strata in the borehole, thereby generating induced eddy currents. The receiving coil is used to receive the secondary magnetic field of the eddy currents.

[0022] The trajectory measurement module includes a gyroscope sensor and an accelerometer sensor, used to measure the borehole inclination angle, azimuth angle, and tool face angle.

[0023] Furthermore, the elastic packer is a rubber packer.

[0024] A method for drilling and grouting to detect water inrush and mudslide hazards in tunnels, comprising the aforementioned integrated drilling and grouting device for detecting water inrush and mudslide hazards in tunnels, including the following steps:

[0025] Step 1: Design the directional drilling trajectory based on the actual requirements of the construction site;

[0026] Set the working pressure threshold of the servo electric cylinder and the expansion threshold of the elastic packer;

[0027] Step 2: The drilling power unit instructs the drill rod to drill along the directional drilling trajectory until a directional borehole is formed;

[0028] Step 3: The grouting device injects grout into the drill pipe. When the grout pressure inside the grouting packer exceeds the working threshold of the servo cylinder, the output shaft of the servo cylinder drives the valve rod to retract, causing the elastic packer to expand and seal the annular area between the drill pipe and the borehole. After the expansion threshold is reached, the output shaft of the servo cylinder drives the valve rod to extend and reseal the grouting packer groove.

[0029] Step 4: Grouting is performed using multiple grouting nozzles, and the grouting effect is simultaneously detected using a drilling probe sub. If the effect meets the standard, the grouting is completed.

[0030] If the effect is not satisfactory, continue grouting until the grouting effect meets the requirements.

[0031] Furthermore, in step 4, the grouting effect is judged using the following method:

[0032] Step a: The transmitting coil of the electromagnetic detection module transmits a pulsed magnetic field to the strata surrounding the borehole, thereby generating induced eddy currents in the surrounding strata.

[0033] Step b involves receiving electromagnetic signals in the horizontal, vertical, and longitudinal directions within the borehole using a receiving coil to determine the area of ​​the low-resistivity anomaly zone that is the source of water inrush and mudslide disasters. This area is denoted as […]. S 1;

[0034] Step c: After the slurry has solidified and stopped flowing, the receiving coil re-detects the electromagnetic signals in the horizontal, vertical, and longitudinal directions within the borehole to determine the area of ​​the low-resistivity anomaly zone at the source of water inrush and mudslide, denoted as . S 2;

[0035] when If the grouting effect is ≤10%, the grouting effect meets the standard.

[0036] Furthermore, in step 1, the pressure threshold for the servo electric cylinder to start working is less than 8 MPa;

[0037] The pressure threshold for the grouting nozzle to start working is greater than 8 MPa.

[0038] Compared with the prior art, the present invention has the following technical effects:

[0039] The integrated drilling and grouting device and method for tunnel water inrush and mudslide disaster sources of this invention overcomes the technical bottleneck of long-distance treatment of such disasters. Based on directional long boreholes, this integrated device and method enables advanced disaster source treatment, effectively detecting and treating over longer distances, demonstrating a significant advantage in long detection range. Furthermore, this integrated device and method completes directional drilling construction, disaster source detection during drilling, disaster source treatment during drilling, and grouting effect evaluation during the directional drilling process. Drilling, detection, grouting, and evaluation are all achieved in a single drilling run, significantly improving the efficiency of tunnel water inrush and mudslide disaster source treatment and making it suitable for large-scale industrial use and promotion. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the integrated drilling and injection device for tunnel water inrush and mudslide disaster sources of the present invention;

[0041] Figure 2 This is a schematic cross-sectional view of the grouting packer during drilling in one embodiment of the present invention;

[0042] Figure 3 This is a schematic cross-sectional view of the grouting packer during grouting in one embodiment of the present invention;

[0043] Figure 4 This is a cross-sectional structural diagram of the drilling grouting switching short section in one embodiment of the present invention;

[0044] Figure 5 This is a cross-sectional structural diagram of the drilling and grouting switching short section during grouting in one embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the drilling detection sub structure in this invention.

[0046] The meanings of the labels in the diagram are as follows:

[0047] 1. Pump truck; 2. Drill pipe; 3. Directional drilling rig; 4. Grouting packer; 5. Drilling grouting switching sub; 6. Detection while drilling sub; 7. Forced slant screw drill bit; 8. Directional drill bit;

[0048] 401. Packer sleeve; 402. Grouting packer groove; 403. Elastic packer; 404. Servo electric cylinder; 405. Valve stem; 406. Pressure sensor; 407. Pull wire sensor;

[0049] 501. Short section housing; 502. Grouting nozzle; 503. Grouting nozzle mounting hole; 504. Through groove; 505. First compression spring; 506. Piston; 507. Piston rod; 508. Second compression spring;

[0050] 601. Transmission module; 602. Power supply module; 603. Electromagnetic detection module; 604. Trajectory measurement module. Detailed Implementation

[0051] It should be noted that, unless otherwise specified, all components in this invention are known in the prior art. For example, the forced-build slant screw drill bit uses a commonly known forced-build slant screw drill bit.

[0052] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0053] like Figure 1 As shown, an integrated drilling and grouting device for tunnel water inrush and mudslide disaster sources includes a pump truck 1, which is equipped with a drilling power unit, a grouting device and a controller; the drilling power unit is connected to the rear of the drill rod 2, and the output end of the grouting device is connected to the rear end of the drill rod.

[0054] The drill rod 2 is mounted on the directional drilling rig 3 in the middle; from back to front, the drill rod 2 is equipped with a grouting packer 4, a drilling grouting switching sub 5, a drilling detection sub 6, and a forced slant screw drill bit 7; the drill rod 2 is equipped with a directional drill bit 8 at the front end.

[0055] According to conventional choices in the art, an orifice device is installed at the borehole opening, which is connected to the orifice casing, for collecting and transporting drill cuttings generated during drilling.

[0056] The grouting packer 4 includes a packer sleeve 401 mounted on the drill pipe 2. A through grouting packer groove 402 is provided on the packer sleeve 401. An elastic packer 403 is fixedly mounted on the packer sleeve 401, covering the grouting packer groove 402. A servo cylinder 404 is provided inside the housing of the packer sleeve 401. The output shaft of the servo cylinder 404 is coaxially and fixedly connected to the valve stem 405. The servo cylinder 404 can drive the valve stem 405 to extend from the side of the grouting packer groove 402, thereby causing the valve stem 405 to block the grouting packer groove 402.

[0057] The packer sleeve 401 is also equipped with a pressure sensor 406 and a pull wire sensor 407 inside the housing. The pressure sensor 406 is used to detect the liquid pressure inside the packer sleeve 401, and the pull wire sensor 407 is used to detect the displacement of the elastic packer 403.

[0058] The drilling and grouting dual-purpose pump truck 1, directional drilling rig 3, pressure sensor 406, wire sensor 407, drilling and grouting switching sub 5, drilling and detection sub 6, and forced slant screw drill bit 8 are all electrically connected to the controller.

[0059] When this device is in use, the drilling power unit provides drilling power to the drill rod 2, and the grouting device injects grout into the drill rod 2.

[0060] The directional drilling rig 3 is a well-known device in the field, which has the function of automatically loading and unloading drill rods and provides power for drilling operations.

[0061] The forced directional drilling tool 7 is also a known device in the art. Specifically, in this embodiment, the forced directional drilling tool 7 has a directional drilling capacity of more than 2° / 3m in complex and fractured strata.

[0062] The directional drill bit 8 is a known device in the art and has the function of preventing drill cuttings from flowing back into the forced directional screw drill bit 7.

[0063] During drilling, the cross-sectional structure diagram of the grouting packer 4 is shown below. Figure 2 As shown, during the drilling process, the grouting packer 4 does not work. At this time, the elastic packer 403 covers the grouting packer groove 402, and the valve stem 507 blocks the grouting packer groove 402.

[0064] During grouting, the cross-sectional structure diagram of the grouting packer 4 is shown below. Figure 3As shown, the grout enters the drill pipe 2 and then the grouting packer 4. The pressure sensor 406 is used to detect the liquid pressure inside the packer sleeve 401. When the liquid pressure reaches the preset threshold, the valve stem 405 retracts, releasing the seal on the grouting packer groove 402. At this time, the grout can enter the grouting packer groove 402. Under the action of liquid pressure, the elastic packer 403 expands, thereby sealing the annular area between the borehole and the drill pipe 2, laying the foundation for subsequent grouting.

[0065] It should be noted that the communication methods between the pressure sensor 406, the pull wire sensor 407, and the controller in this embodiment all adopt commonly known methods in the prior art.

[0066] As a preferred embodiment, the drilling grouting switching sub 5 includes a sub housing 501, multiple grouting nozzles 502, and a sealing assembly;

[0067] Multiple grouting nozzle mounting holes 503 are provided on the inner wall of the short section housing 501. A through groove 504 is provided at the bottom of the grouting nozzle mounting hole 503. The grouting nozzles 502 are installed in the grouting nozzle mounting holes 503 one by one. A first compression spring 505 is sleeved on the grouting nozzle 502. One end of the first compression spring 505 is fixedly connected to the bottom of the grouting nozzle mounting hole 503, and the other end is fixedly connected to the grouting nozzle 502. When the first compression spring 505 is compressed, the grouting nozzle 502 can extend out of the short section housing 501 through the through groove 504.

[0068] The sealing assembly includes a piston 506, which is coaxially and fixedly connected to a piston rod 507. A second compression spring 508 is sleeved on the piston rod 507, and one end of the second compression spring 508 is fixedly connected to the piston 506.

[0069] The inner diameter of the front part of the short section housing 501 increases from front to back, forming two annular first and second sealing platforms; the other end of the second compression spring 508 is fixedly connected to the first sealing platform;

[0070] When the second compression spring 508 is in its natural state, the piston 506 does not contact the second sealing platform; when the second compression spring 508 is compressed, the piston 506 can seal the annular zone in the middle of the second sealing platform.

[0071] During drilling, the cross-sectional structure diagram of drilling grouting switching section 5 is shown below. Figure 4As shown, during the drilling process, the drilling grouting switching section 5 pumps low-pressure flushing fluid. The low-pressure flushing fluid is insufficient to compress the first compression spring 505 and the second compression spring 508. At this time, both the first compression spring 505 and the second compression spring 508 are in their natural state. The piston 506 does not block the annulus in the middle of the second sealing platform. Even if there is a small amount of grout, it can pass through the annulus.

[0072] During grouting, the cross-sectional structure diagram of grouting switching section 5 is shown below. Figure 5 As shown, during the grouting process, the grout enters the grouting switching section 5. The high-pressure grout then compresses the first compression spring 505 and the second compression spring 508 through hydraulic pressure. At this time, the piston 506 blocks the annular zone in the middle of the second sealing platform, and the grouting nozzle 502 extends.

[0073] It should be noted that, according to the conventional selection in this field, since the grouting packer 4 needs to complete the sealing first and the grouting switching section 5 needs to be grouted, it is only necessary to adjust the working threshold of the grouting nozzle 502, that is, the working hydraulic pressure of the grouting nozzle 502 is set higher. This ensures that as the grouting pressure increases, the grouting packer 4 completes the sealing first and then the grouting nozzle 502 starts to work.

[0074] As a preferred option, such as Figure 6 As shown, the drilling detection sub 6 includes a transmission module 601, a power supply module 602, an electromagnetic detection module 603, and a trajectory measurement module 604;

[0075] Transmission module 601 is used to transmit the current drilling detection data of drilling detection sub 6 to the wellhead via wireless mud pulses or electromagnetic waves.

[0076] The power supply module 602 is equipped with a rechargeable battery pack to power the transmission module 601, the electromagnetic detection module 603 and the trajectory measurement module 604.

[0077] The electromagnetic detection module 603 includes a transmitting coil and a receiving coil. The transmitting coil is used to transmit a primary pulse magnetic field into the surrounding strata in the borehole, thereby generating induced eddy currents; the receiving coil is used to receive the secondary magnetic field of the eddy currents.

[0078] The trajectory measurement module 604 includes a gyroscope sensor and an accelerometer sensor for measuring borehole inclination angle, azimuth angle, and tool face angle.

[0079] Specifically, the resilient packer 403 uses a rubber packer.

[0080] A method for drilling and grouting to detect water inrush and mudslide hazards in tunnels, based on the aforementioned integrated drilling and grouting device for detecting water inrush and mudslide hazards in tunnels, includes the following steps:

[0081] Step 1: Design the directional drilling trajectory based on the actual requirements of the construction site;

[0082] Set the working pressure threshold of the servo electric cylinder 404 and the expansion threshold of the elastic packer 403;

[0083] Step 2: The drilling power device instructs the drill rod 2 to drill along the directional drilling trajectory until a directional borehole is formed;

[0084] Step 3: The grouting device injects grout into the drill rod 2. When the grout pressure inside the grouting packer 4 exceeds the working threshold of the servo cylinder 404, the output shaft of the servo cylinder 404 drives the valve rod 405 to retract, causing the elastic packer 403 to expand and seal the annular area between the drill rod 2 and the borehole. Until the expansion threshold is reached, the output shaft of the servo cylinder 404 drives the valve rod 405 to extend, resealing the grouting packer groove 402.

[0085] Step 4: Grout the area to be grouted and use the 6-section drilling probe sub to check the grouting effect. If the effect meets the standard, the grouting is completed.

[0086] If the effect is not satisfactory, grouting should be repeated until the grouting effect meets the requirements.

[0087] Specifically, in step 4, the following method is used to determine the grouting effect:

[0088] Step a: The transmitting coil of the electromagnetic detection module 603 transmits a pulsed magnetic field to the strata surrounding the borehole, thereby generating induced eddy currents in the surrounding strata.

[0089] The transmitting coil transmits a pulsed magnetic field to the surrounding strata in the borehole. When the magnetic field changes, induced eddy currents are generated in the surrounding low-resistivity body. Due to the presence of water, the water inrush and mudslide disaster source is a low-resistivity anomaly relative to the surrounding stable strata. The receiving coil receives the secondary magnetic field of the eddy current generated by the low-resistivity anomaly of the water inrush and mudslide disaster source. The secondary field signal has a large amplitude and slow attenuation, which shows obvious low-resistivity anomaly.

[0090] Step b involves receiving electromagnetic signals in the X, Y, and Z directions within the borehole using a receiving coil to determine the area of ​​the low-resistivity anomaly zone that is the source of water inrush and mudslide disasters. This area is denoted as […]. S 1;

[0091] The receiving coil can receive electromagnetic signals in the X, Y, and Z directions of the borehole. The Z component reflects the intensity of the low-resistivity anomaly along the borehole axis, while the X and Y components are used to determine the radial orientation of the anomaly relative to the borehole. Therefore, it is possible to achieve advanced detection and precise location of water inrush and mud inrush disaster sources, and determine the area of ​​the low-resistivity anomaly zone of the water inrush and mud inrush disaster source. S 1.

[0092] Step c: After the slurry has solidified and stopped flowing, the receiving coil re-detects the electromagnetic signals in the X, Y, and Z directions within the borehole to determine the area of ​​the low-resistivity abnormal zone of the water inrush and mudslide disaster source, denoted as [missing information]. S 2;

[0093] when If the grouting effect is ≤10%, the grouting effect meets the standard.

[0094] The principle of evaluating grouting effect using electromagnetic detection modules: After completing the grouting while drilling at the source of water inrush and mud inrush, a certain amount of time is allowed for the cement grout to solidify and stop flowing. The area of ​​the low-resistivity anomaly zone at the source of water inrush and mud inrush after grouting treatment is then detected using an electromagnetic detection module. S 2.

[0095] Among them, the electromagnetic detection module 603 in the drilling detection section 6 uses transient electromagnetic method to detect the location of water inrush and mudslide disaster sources in the tunnel. After detecting the disaster source location, the drilling direction can be adjusted in time to make the borehole trajectory as close as possible to the disaster source, so as to ensure the grouting treatment effect.

[0096] Specifically, in step 1, the working pressure threshold of the servo electric cylinder 404 is less than 8 MPa;

[0097] The working pressure threshold of grouting nozzle 502 is greater than 8 MPa.

Claims

1. A tunnel water gushing cementation disaster source drilling and grouting integrated device, characterized in that, It includes a pump truck (1) and a directional drilling rig (3). The pump truck (1) is equipped with a grouting device and a controller. The drilling power unit is connected to the rear of the drill rod (2). The output end of the grouting device is connected to the rear end of the drill rod. The drill rod (2) is mounted on the directional drilling rig (3) in the middle; the front part of the drill rod (2) is provided with a grouting packer (4), a drilling grouting switching sub (5), a drilling detection sub (6), and a forced slant screw drill bit (7) in sequence from back to front; the front end of the drill rod (2) is provided with a directional drill bit (8); The grouting packer (4) includes a packer sleeve (401) installed on the drill rod (2). A through grouting packer groove (402) is opened on the wall of the packer sleeve (401). An elastic packer (403) is fixedly sleeved on the outside of the packer sleeve (401). The elastic packer (403) covers the grouting packer groove (402). A servo cylinder (404) is installed inside the shell of the packer sleeve (401). The output shaft of the servo cylinder (404) is coaxially fixedly connected to the valve stem (405). The servo cylinder (404) can drive the valve stem (405) to extend or retract from the side of the grouting packer groove (402), thereby causing the valve stem (405) to block or leave the grouting packer groove (402). The packer sleeve (401) is also equipped with a pressure sensor (406) and a pull wire sensor (407) inside the housing; the pressure sensor (406) is used to detect the liquid pressure inside the packer sleeve (401), and the pull wire sensor (407) is used to detect the displacement of the elastic packer (403). The pump truck (1), directional drilling rig (3), pressure sensor (406), wire sensor (407), drilling and grouting switching sub (5), drilling and detection sub (6), and forced slant screw drill bit are all electrically connected to the controller. The drilling grouting switching sub (5) includes a sub housing (501), multiple grouting nozzles (502), and a sealing assembly; The inner wall of the short section housing (501) is provided with a plurality of grouting nozzle mounting holes (503), and a through groove (504) is provided at the bottom of the grouting nozzle mounting holes (503). The grouting nozzles (502) are installed in the grouting nozzle mounting holes (503) one by one. A first compression spring (505) is sleeved on the grouting nozzle (502). One end of the first compression spring (505) is fixedly connected to the bottom of the grouting nozzle mounting hole (503), and the other end is fixedly connected to the grouting nozzle (502). When the first compression spring (505) is compressed, the grouting nozzle (502) can extend out of the short section housing (501) through the through groove (504). The sealing assembly includes a piston (506), which is coaxially and fixedly connected to a piston rod (507). A second compression spring (508) is sleeved on the piston rod (507), and one end of the second compression spring (508) is fixedly connected to the piston (506). The inner diameter of the front part of the short section housing (501) increases from front to back, forming two annular first sealing platforms and second sealing platforms; the other end of the second compression spring (508) is fixedly connected to the first sealing platform; When the second compression spring (508) is in its natural state, the piston (506) does not contact the second sealing platform; when the second compression spring (508) is compressed, the piston (506) can seal the annular zone in the middle of the second sealing platform.

2. The tunnel water gushing cementation disaster source drilling and grouting integrated device of claim 1, wherein, The drilling detection sub (6) includes a transmission module (601), a power supply module (602), an electromagnetic detection module (603), and a trajectory measurement module (604). The transmission module (601) is used to transmit the current drilling detection data of the drilling detection sub (6) to the borehole opening via wireless mud pulses or electromagnetic waves; The power supply module (602) is equipped with a rechargeable battery pack for powering the transmission module (601), the electromagnetic detection module (603), and the trajectory measurement module (604); The electromagnetic detection module (603) includes a transmitting coil and a receiving coil. The transmitting coil is used to transmit a primary pulse magnetic field to the surrounding strata in the borehole, thereby generating induced eddy currents. The receiving coil is used to receive the secondary magnetic field of the eddy currents. The trajectory measurement module (604) includes a gyroscope sensor and an accelerometer sensor for measuring the borehole inclination angle, azimuth angle and tool face angle.

3. The integrated drilling and grouting device for tunnel water gushing and disaster source according to claim 1, characterized in that, The elastic packer (403) is a rubber packer.

4. A tunnel water gushing and mud bursting disaster source drilling and grouting method, which is based on the integrated tunnel water gushing and mud bursting disaster source drilling and grouting device of claim 2, characterized in that, Includes the following steps: Step 1: Design the directional drilling trajectory based on the actual requirements of the construction site; Set the working pressure threshold of the servo electric cylinder (404) and the expansion threshold of the elastic packer (403); Step 2: The drilling power device causes the drill rod (2) to drill along the directional drilling trajectory until a directional borehole is formed; Step 3: The grouting device injects grout into the drill rod (2). When the grout pressure inside the grouting packer (4) exceeds the working threshold of the servo cylinder (404), the output shaft of the servo cylinder (404) drives the valve rod (405) to retract, causing the elastic packer (403) to expand and seal the annular area between the drill rod (2) and the borehole. Until the expansion threshold is reached, the output shaft of the servo cylinder (404) drives the valve rod (405) to extend, resealing the grouting packer groove (402). Step 4: Grouting is performed using multiple grouting nozzles (502), and the grouting effect is simultaneously detected using a drilling probe sub (6). If the effect meets the standard, the grouting is completed. If the effect is not satisfactory, continue grouting until the grouting effect meets the requirements.

5. The method according to claim 4, wherein the method is characterized by, In step 4, the following method is used to determine the grouting effect: Step a, the transmitting coil of the electromagnetic detection module (603) transmits a pulsed magnetic field to the strata surrounding the borehole, thereby generating induced eddy currents in the surrounding strata; Step b, the receiving coil detects the electromagnetic signals in the transverse, longitudinal and vertical directions in the borehole, and further determines the low-resistance anomaly area of the water inrush and mud burst disaster source, denoted as S 1; Step c: After the slurry has solidified and stopped flowing, the receiving coil re-detects the electromagnetic signals in the horizontal, vertical, and longitudinal directions within the borehole to determine the area of ​​the low-resistivity anomaly zone at the source of water inrush and mudslide, denoted as . S 2; When ≤ 10%, then the grouting effect is up to standard.

6. The method according to claim 5, wherein the drilling and grouting of the tunnel water gushing disaster source is performed by using a drill rig. In step 1, the pressure threshold for the servo electric cylinder (404) to start working is less than 8 MPa; The pressure threshold for the grouting nozzle (502) to start working is greater than 8 MPa.

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