A multi - coal - seam gas drainage borehole grouting hole - sealing device and technology

Abstract

The present invention provides a multi-coal seam gas extraction drilling grouting and sealing device and process. The multi-coal seam gas extraction drilling grouting and sealing device comprises: a mixing barrel, a grouting pump and a sealing device for sealing the coal seam borehole. The sealing device comprises a sealing portion, and the sealing portion comprises a gas outlet pipe for outlet gas from the coal seam borehole. The multi-coal seam gas extraction drilling grouting and sealing device provided by the present invention provides a multi-coal seam gas extraction drilling grouting and sealing device. By arranging a vibrator and a vibrating rod on the connecting pipe, when injecting slurry into the grouting cavity, the vibrating rod is contacted with the slurry, and the vibrator drives the vibrating rod to vibrate, which can cause the slurry to vibrate synchronously inside, and then quickly discharge the air inside the slurry to the outside, making the inside of the slurry more substantial, avoiding the formation of more pores after solidification, and ensuring the subsequent sealing of the slurry for sealing the borehole and the stability of the support.

Description

Technical Field

[0001] The present invention relates to the field of coal mining, and in particular to a multi-coal seam gas extraction drilling grouting and sealing device and process. Background Art

[0002] During the coal mining process, there is a large amount of gas in the coal seam. In order to avoid gas explosion during the mining process, it is generally necessary to extract the gas in the coal seam. The specific process of coal mine gas extraction is: first drill into the coal seam and gas concentration area, then use grouting and sealing equipment to seal the borehole, and then use extraction equipment to extract the gas in the coal seam and goaf and collect it for utilization.

[0003] However, the existing grouting and sealing equipment is generally composed of a grouting pump, a mixing barrel and a sealing component, wherein the sealing component includes a gas extraction pipe, a sealing bag, a grouting pipe and a return pipe. When the sealing component seals the borehole, the grouting pipe and the return pipe are first wrapped around the upper and lower ends of the surface of the gas extraction pipe respectively, and then the two sealing bags are wrapped around the two ends of the extraction pipe respectively. Then, the entire sealing component is installed in the borehole, and the two sealing bags are squeezed to make the sealing bags begin to expand inside the borehole, and then a grouting pump is used to add slurry from the grouting pipe to the two sealing bags to fill the space between the two sealing bags.

[0004] The above-mentioned plugging equipment still has the following deficiencies in actual use: (1) When the slurry enters the grouting space between the two sealing bags from the grouting pipe, there is a certain amount of air in the grouting space. After the slurry enters the grouting space, there will be a certain amount of air in the slurry. After the slurry cools, it is easy to form more pores inside it, thereby affecting its overall sealing.

[0005] (2) Since the grouting pipe is set below the grouting space, when the slurry reaches a position higher than the grouting pipe, it will produce a certain resistance to the grouting pipe, making the slurry discharge speed of the grouting pipe relatively slow, and when the grouting is stopped, the problem of slurry backflow is likely to occur. Summary of the Invention

[0006] The present invention provides a multi-coal seam gas extraction drilling grouting and sealing device, which solves the problem of excessive air in the grouting space after the slurry enters the grouting space.

[0007] In order to solve the above technical problems, the present invention provides a multi-coal seam gas extraction drilling grouting and sealing equipment, including: a mixing barrel, a grouting pump and a sealing device for sealing the coal seam borehole, the sealing device includes a sealing part, the sealing part includes a gas outlet pipe for guiding the gas in the coal seam borehole, the two ends of the outer side of the gas outlet pipe are respectively provided with a first sealing bag and a second sealing bag, a grouting inner cavity is formed between the first sealing bag and the second sealing bag and the inner wall of the coal seam borehole, the sealing device also includes a device for injecting gas into the grouting inner cavity The grouting part injects slurry into the cavity; the grouting part includes a connecting pipe connected to the grouting pump and a vibration component for uniformly vibrating the slurry inside the grouting cavity, the vibration component is arranged on the end of the connecting pipe away from the grouting pump, and the end of the connecting pipe away from the grouting pump is detachably connected to a guide pipe with a function of synchronously changing the grouting position with the grouting accumulation height. When the connecting pipe is connected to the guide pipe, one end of the vibration component passes through the interior of the guide pipe and extends into the grouting cavity.

[0008] Preferably, the vibration component includes a vibrator fixedly mounted on one end of the connecting pipe near the guide pipe, and the vibration end of the vibrator is arranged on the inner side of the connecting pipe, and the vibration end of the vibrator is fixedly connected to a vibration rod arranged along the central axis direction of the end of the connecting pipe, and a plurality of slurry passing grooves are provided on the outer side of the end of the vibrating rod near the guide pipe, and a contraction component for increasing the contact area between the vibrating rod and the slurry is provided at the end of the vibrating rod away from the connecting pipe, and a driving component for controlling the contraction action of the contraction component is provided at the end of the vibrating rod near the connecting pipe.

[0009] Preferably, the contraction assembly includes a piston block and multiple air bags, a movable groove is opened at the end of the vibrating rod away from the connecting pipe, the piston block is slidably installed in the movable groove, and the multiple air bags are fixedly installed at the end of the vibrating rod close to the piston block and are all connected to the movable groove, and a tension spring is fixedly connected between one side of the piston block and the inner wall of the movable groove.

[0010] Preferably, the driving assembly includes a movable part in a T-shape and slidably installed inside the vibrating rod, one end of the horizontal section of the movable part passes through the outside of the vibrating rod, and an elastic part is fixedly connected between the vertical section of the movable part and the vibrating rod, and the vertical section of the movable part is fixedly connected to one side of the piston block through a rope.

[0011] Preferably, the guide pipe is composed of a transverse conduit and a vertical conduit, one end of the connecting pipe is threadedly connected to one end of the transverse conduit, the transverse conduit is away from the first sealing bag and extends into the grouting cavity, the vertical conduit is vertically fixed on one end of the transverse conduit located in the grouting cavity, and a plurality of first grouting holes are evenly opened on the outside of the vertical conduit from bottom to top.

[0012] Preferably, both ends of the transverse conduit are fixedly connected with sealing plugs with passing gaps, and a plurality of second grouting holes are evenly opened at one end of the transverse conduit close to the vertical conduit.

[0013] Preferably, the end of the vibration rod away from the connecting pipe is configured to be in a pointed shape, and the end of the vibration rod close to the airbag is configured to be in an outwardly convex shape.

[0014] Preferably, a tightenable round hole is provided in the middle of the first sealing bag and the second sealing bag, and a slurry return pipe is fixedly connected to the upper end of one side of the first sealing bag, and the slurry return pipe is connected to the grouting cavity.

[0015] Preferably, the above-mentioned multi-coal seam gas extraction drilling and grouting process includes the following steps: S1, first using a drilling device to drill a coal seam borehole of a certain size at a specified position in the coal seam.

[0016] S2. Then, the sealing device is assembled and installed in the coal seam drill hole.

[0017] S3. Connect the grouting part to the grouting pump and inject slurry into the grouting cavity.

[0018] S4. Then separate the connecting pipe fittings and the diversion pipe fittings.

[0019] Compared with the related art, the multi-coal seam gas extraction drilling grouting and sealing equipment provided by the embodiment of the present invention has the following beneficial effects: (1) by arranging a vibrator and a vibrating rod on the connecting pipe, when injecting slurry into the grouting cavity, the vibrating rod is used to contact the slurry, and the vibrator drives the vibrating rod to vibrate, which can make the inside of the slurry vibrate synchronously, and then quickly discharge the internal air to the outside, making the inside of the slurry more substantial, avoiding the formation of more pores after solidification, and improving the sealing and supporting stability of the slurry to the borehole.

[0020] (2) A guide pipe is formed by arranging a combination of a transverse conduit and a vertical conduit to transport the slurry to the grouting cavity. During grouting, grouting is first performed from the second grouting hole on the transverse conduit, and then from the first grouting hole at different positions on the vertical conduit, so that the slurry injection position changes with the change of the slurry accumulation height. The slurry can always be higher than the height of the slurry accumulated in the grouting cavity, avoiding the accumulation of slurry to hinder the injected slurry, ensuring that the injected slurry is always in a fast flow state, and greatly shortening the grouting time into the grouting cavity. In addition, in conjunction with the sealing plug in the transverse conduit, the slurry backflow problem can be prevented when the vibrating rod is pulled out.

[0021] (3) By setting up the contraction component and the driving component for use in conjunction, the driving component can drive the contraction component to automatically expand while the connecting pipe is connected to the guide pipe. On the one hand, the air bag deployed in the contraction component is used together with the vibration rod as a contact structure with the slurry, which further increases the contact area between the vibration rod and the slurry. When the vibration plate vibrates the slurry, the vibration range is wider and the vibration effect is stronger, which greatly speeds up the discharge speed of the air inside the slurry. On the other hand, the air bag is deployed to prevent the slurry from entering the interior and affecting its normal contraction, and the contraction component and the driving component can be reused, making it more convenient and worry-free to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a multi-coal seam gas extraction drilling and grouting sealing device provided in an embodiment of the present invention.

[0023] Figure 2 for Figure 1 Schematic diagram of the structure between the sealing part and the grouting part shown.

[0024] Figure 3 for Figure 2 A partial enlarged view of area a is shown.

[0025] Figure 4 for Figure 2 A local enlarged view of area b is shown.

[0026] Figure 5 It is a structural schematic diagram of the flow guide pipe in the present invention.

[0027] Figure 6 Schematic diagram of the structure of the vibration rod in the present invention.

[0028] : Numbers in the figure: 1. Mixing barrel; 2. Grouting pump; 3. Sealing device; 4. Sealing part; 41. Gas outlet pipe; 42. First sealing bag; 43. Second sealing bag; 44. Round hole; 45. Slurry return pipe; 5. Grouting part; 51. Connecting pipe; 52. Vibrating component; 521. Vibrator; 522. Vibrating rod; 523. Slurry passing groove; 524. Contraction component; 5241. Piston block; 5242. Air bag; 5243. Tension spring; 525. Driving component; 5251. Movable part; 5252. Elastic part; 5253. Rope; 526. Movable groove; 53. Diversion pipe; 531. Horizontal conduit; 532. Vertical conduit; 533. First grouting hole; 534. Sealing plug; 535. Second grouting hole; 6. Coal seam drilling. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described below with reference to the accompanying drawings. In the process, to ensure clarity and convenience of the description, we may exaggerate the width of the lines or the size of the components in the drawings.

[0030] In addition, the terms used below are defined based on their functions in the present invention and may vary depending on the operator's intention or custom; therefore, these terms are defined based on the entire content of this specification.

[0031] Please refer to Figure 1 A multi-coal seam gas extraction drilling grouting sealing device includes: a mixing barrel 1, a grouting pump 2 and a sealing device 3 for sealing the coal seam borehole 6. The mixing barrel 1 is used to stir to obtain slurry. The grouting pump 2 is connected to the mixing barrel 1 and is used to suck out the slurry in the mixing barrel 1. The sealing device 3 includes a blocking part 4. The blocking part 4 includes a gas outlet pipe 41 for guiding the gas in the coal seam borehole 6. A valve is provided at one end of the gas outlet pipe 41 away from the coal seam borehole 6. After the sealing device 3 is installed, it is connected to an external gas conduit to guide the gas in the coal seam borehole 6. The two ends of the outer side of the gas outlet pipe 41 are respectively A first sealing bag 42 and a second sealing bag 43 are provided, and a grouting cavity is formed between the first sealing bag 42, the second sealing bag 43 and the inner wall of the coal seam borehole 6. A first tightenable circular hole 44 is provided in the middle of the first sealing bag 42 and the second sealing bag 43, which facilitates the passage of the gas outlet pipe 41 through the first sealing bag 42 and the second sealing bag 43. A slurry return pipe 45 is fixedly connected to the upper end of one side of the first sealing bag 42, and the slurry return pipe 45 is connected to the grouting cavity. After the grouting cavity is filled with slurry, the slurry return pipe 45 discharges excess slurry, so that the staff can know that the grouting cavity has been filled.

[0032] When in use, the first sealing bag 42 and the second sealing bag 43 are respectively placed on the outside of the gas extraction pipe through the circular hole 44, and the first sealing bag 42 is close to the port position of the coal seam drill hole 6, and there is a certain distance between the first sealing bag 42 and the second sealing bag 43 to form a grouting cavity, thereby completing the assembly of the sealing part 4.

[0033] Please refer to Figure 1 、 Figure 2 and Figure 5 The sealing device 3 also includes a grouting part 5 for injecting slurry into the grouting cavity; the grouting part 5 includes a connecting pipe 51 connected to the grouting pump 2 and a vibrating component 52 for uniformly vibrating the slurry inside the grouting cavity. The vibrating component 52 is arranged at the end of the connecting pipe 51 away from the grouting pump 2, and the end of the connecting pipe 51 away from the grouting pump 2 is detachably connected to a guide pipe 53 with a function of synchronously changing the grouting position with the grouting accumulation height. A second tightening circular hole 44 is provided at the lower end of the first sealing bag 42 to facilitate the guide pipe 53 to pass through the first sealing bag 42; the guide pipe 53 is composed of a horizontal conduit 531 and a vertical conduit 532. One end of the connecting pipe 51 is threadedly connected to one end of the horizontal conduit 531, and the horizontal conduit 531 is away from the first sealing bag 42. And it extends into the grouting cavity. The vertical conduit 532 is vertically fixedly installed on one end of the horizontal conduit 531 located in the grouting cavity. A plurality of first grouting holes 533 are evenly opened on the outside of the vertical conduit 532 from bottom to top. When the slurry enters the vertical conduit 532 from the horizontal conduit 531, as the slurry height continues to increase, the slurry can be discharged through the first grouting holes 533 on the vertical conduit 532 that are higher than the slurry height position, thereby avoiding being obstructed by the slurry. Both ends of the horizontal conduit 531 are fixedly connected with a sealing plug 534 with a passing gap. A plurality of second grouting holes 535 are evenly opened at one end of the horizontal conduit 531 close to the vertical conduit 532, which are used to introduce slurry into the grouting cavity; the guide pipe 53 is located on the side of the gas outlet pipe 41, and the two do not intersect.

[0034] like Figure 1As shown, when the guide pipe 53 is in use, the end of the horizontal guide pipe 531 away from the vertical guide pipe 532 is passed through the second tightening circular hole 44 on the first sealing bag 42 from right to left, so that one end of it is in the grouting space. After the sealing part 4 is fixed inside the coal seam borehole 6, the guide pipe 53 is connected to the connecting pipe 51. When the connecting pipe 51 is connected to the guide pipe 53, one end of the vibration component 52 passes through the inside of the guide pipe 53 and extends to the grouting cavity. After that, the slurry first flows into the grouting cavity from the second grouting hole 535 of the horizontal pipe 531. When the height of the slurry accumulation inside the grouting cavity is flush with the second grouting hole 535, the second grouting hole 535 is affected. The obstruction of the slurry causes most of the slurry to flow into the vertical pipe 532, and then the first grouting hole 533 on it continues to flow into the grouting cavity. When the slurry height in the grouting cavity exceeds the second grouting hole 535, the slurry will continue to flow out through the first grouting hole 533 which is higher than the slurry height, so that the slurry is always discharged higher than the slurry height in the grouting cavity to avoid being obstructed by the slurry. When the slurry is injected into the grouting cavity, the air inside it can be quickly discharged by vibrating the slurry at the same time, thereby avoiding the existence of air holes inside after solidification, until the grouting cavity is filled with slurry, and the slurry is discharged outward through the slurry return pipe 45. At this time, the staff knows that the grouting is completed and stops grouting.

[0035] Please refer to Figure 2 、 Figure 3 and Figure 6The vibration component 52 includes a vibrator 521 fixedly mounted on the connecting pipe 51 near one end of the guide pipe 53, and the vibration end of the vibrator 521 is arranged on the inner side of the connecting pipe 51, which is convenient for connecting with the vibration rod 522. The vibrator 521 is a conventional arrangement in the prior art and is not described in detail here. The vibration end of the vibrator 521 is fixedly connected to a vibration rod 522 arranged along the central axis direction of the end of the connecting pipe 51. The length of the vibration rod 522 is longer than the length of the guide pipe 53, ensuring that the vibration rod 522 can smoothly pass through the guide pipe 53; four slurry passing grooves 523 are opened on the outside of the vibration rod 522 near one end of the guide pipe 53, and the four slurry passing grooves 523 are evenly distributed on the circumference of the vibration rod 522, and the slurry passing grooves 523 are located near the sealing plug 534 at one end of the connecting pipe 51, so that the slurry will not be affected The slurry can continue to flow forward directly through the groove 523 without being blocked by the sealing plug 534, thereby solving the problem that the vibrating rod 522 blocks the flow of the slurry in the transverse duct 531. The end of the vibrating rod 522 away from the connecting pipe 51 is set to a pointed shape, so that the vibrating rod 522 can quickly pass through the two sealing plugs 534; the end of the vibrating rod 522 away from the connecting pipe 51 is provided with a contraction component 524 for increasing the contact area between the vibrating rod 522 and the slurry, and the end of the vibrating rod 522 close to the connecting pipe 51 is provided with a driving component 525 for controlling the contraction action of the contraction component 524. The end of the vibrating rod 522 close to the airbag 5242 is set to an outward convex shape, which can increase the expansion degree of the sealing plug 534 through the gap when in contact with the sealing plug 534, so that the contraction component 524 can smoothly pass through the sealing plug 534.

[0036] Please refer to Figure 3 and Figure 4 The contraction component 524 includes a piston block 5241 and four air bags 5242. The number of air bags 5242 is not limited to four and can be adjusted according to actual use requirements. The end of the vibration rod 522 away from the connecting pipe 51 is provided with a movable groove 526. The piston block 5241 is slidably installed in the movable groove 526. The four air bags 5242 are fixedly installed at the end of the vibration rod 522 close to the piston block 5241 and are all connected to the movable groove 526, so that the internal gas between the movable groove 526 and the air bags 5242 can circulate with each other. The piston block 5 A tension spring 5243 is fixedly connected between one side of 241 and the inner wall of the movable groove 526; the driving component 525 includes a movable part 5251 in a T-shape that is slidably installed inside the vibrating rod 522, and one end of the horizontal section of the movable part 5251 passes through the outer side of the vibrating rod 522. An elastic part 5252 is fixedly connected between the vertical section of the movable part 5251 and the vibrating rod 522. The elastic part 5252 is preferably a spring structure, and the vertical section of the movable part 5251 is fixedly connected to one side of the piston block 5241 through a rope 5253.

[0037] When the contraction component 524 and the driving component 525 are in use, the connecting pipe 51 is first threadedly connected to one end of the transverse guide tube 531, so that the tip of the vibrating rod 522 passes through the transverse guide tube 531 and extends into the grouting cavity. Then, when the transverse guide tube 531 is rotated and threadedly connected to the connecting pipe 51, the end of the transverse guide tube 531 is simultaneously in contact with one end of the horizontal section of the movable part 5251, and a horizontal squeezing force is generated thereon, so that the movable part 5251 squeezes the elastic part 5252 to contract. At the same time, the movable part 5251 generates a pulling force on the connecting rope 5253, which can drive the piston block 5241 to slide inside the movable groove 526 and compress the air inside the movable groove 526, and the tension spring 5243 is also synchronously stretched, so that the air enters the four air bags 5242 from the inside of the movable groove 526, so that the air bags 5242 begin to expand, and the transverse guide tube 5 31 is fully threadedly connected to the connecting pipe 51, so that the movable part 5251 is squeezed to the maximum contraction state, and the piston block 5241 also stops sliding, and the airbag 5242 maintains the expanded shape. At this time, the expanded airbag 5242 is used as the vibration rod 522 and the slurry contact structure. When the vibration rod 522 vibrates, the airbag 5242 can be vibrated synchronously, thereby fully vibrating the slurry. After the slurry is added, the connecting pipe 51 and the transverse guide tube 531 are separated, so that the movable part 5251 is no longer squeezed, and under the elastic force of the elastic part 5252 and the tension spring 5243, the movable part 5251 and the piston block 5241 can be reset respectively, and the gas inside the airbag 5242 is also absorbed into the movable groove 526. The airbag 5242 is finally shrunk, and then the vibration rod 522 can be pulled out.

[0038] In addition, the present invention also provides a multi-coal seam gas extraction drilling grouting and sealing process, which includes the following steps: S1, first use drilling equipment to drill a coal seam borehole 6 of a certain size at a specified position in the coal seam.

[0039] S2. Then, assemble the sealing part 4 first, and then connect the guide pipe 53 to the sealing part 4. After the sealing part 4 is assembled, it is installed in the coal seam borehole 6, and the two sealing bags are squeezed so that the two sealing bags begin to expand inside the borehole and are in close contact with the inner wall of the coal seam borehole 6. A grouting cavity is formed between the two expanded sealing bags and the inner wall of the borehole.

[0040] S3. After that, the connecting pipe 51 is connected to the guide pipe 53, and the slurry in the mixing barrel 1 is transported to the connecting pipe 51 through the grouting pump 2, and then transported to the guide pipe 53 by the connecting pipe 51, and finally enters the grouting cavity. At the same time, the vibrator 521 is started, so that the vibrating rod 522 starts to vibrate, and the tip of the vibrating rod 522 and the inflated airbag 5242 are in contact with the slurry in the grouting cavity and vibrate, so as to discharge the air in the slurry. When the slurry is discharged from the return pipe, the grouting into the grouting cavity is stopped.

[0041] S4. Finally, the threaded connection between the connecting pipe 51 and the guide pipe 53 is released, and the connecting pipe 51 is pulled to separate the vibrating rod 522 from the guide pipe 53. After the slurry in the grouting cavity cools and solidifies, it forms a sealing structure for the borehole together with the two sealing bags to prevent the gas inside the borehole from flowing out.

[0042] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-coal seam gas extraction drilling and grouting sealing device, comprising:

20. The repairing kit for automotive dents, according to claim 19, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole comprises a through-hole, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole comprises a through-hole, a screw bolt, and a nut. The through-hole comprises a through-hole, a screw bolt, and a nut. The vibration component includes a vibrator fixedly mounted on one end of the connecting pipe close to the guide pipe, and the vibration end of the vibrator is arranged on the inner side of the connecting pipe. The vibration end of the vibrator is fixedly connected to a vibration rod arranged along the central axis direction of the end of the connecting pipe. A plurality of slurry passing grooves are provided on the outer side of the vibration rod close to the end of the guide pipe. A contraction component for increasing the contact area between the vibration rod and the slurry is provided on the end of the vibration rod away from the connecting pipe. A driving component for controlling the contraction action of the contraction component is provided on the end of the vibration rod close to the connecting pipe.

2. The multi-coal seam gas extraction drilling and grouting sealing equipment according to claim 1 is characterized in that: The contraction assembly includes a piston block and multiple air bags. A movable groove is provided at the end of the vibrating rod away from the connecting pipe. The piston block is slidably installed in the movable groove. Multiple air bags are fixedly installed at the end of the vibrating rod close to the piston block and are all connected to the movable groove. A tension spring is fixedly connected between one side of the piston block and the inner wall of the movable groove.

3. The multi-coal seam gas extraction drilling and grouting sealing equipment according to claim 2 is characterized in that: The driving assembly includes a T-shaped movable part slidably installed inside the vibrating rod, one end of the horizontal section of the movable part passes through the outside of the vibrating rod, an elastic part is fixedly connected between the vertical section of the movable part and the vibrating rod, and the vertical section of the movable part is fixedly connected to one side of the piston block through a rope.

4. The multi-coal seam gas extraction drilling and grouting sealing equipment according to claim 1, characterized in that: The guide pipe is composed of a transverse conduit and a vertical conduit. One end of the connecting pipe is threadedly connected to one end of the transverse conduit. The transverse conduit is away from the first sealing bag and extends into the grouting cavity. The vertical conduit is vertically fixed on one end of the transverse conduit located in the grouting cavity. A plurality of first grouting holes are evenly opened on the outside of the vertical conduit from bottom to top.

5. The multi-coal seam gas extraction drilling and grouting sealing equipment according to claim 4 is characterized in that: Both ends of the transverse conduit are fixedly connected with sealing plugs with passing gaps, and a plurality of second grouting holes are evenly opened at one end of the transverse conduit close to the vertical conduit.

6. The multi-coal seam gas extraction drilling and grouting sealing equipment according to claim 2, characterized in that: The end of the vibration rod away from the connecting pipe is configured to be in a pointed shape, and the end of the vibration rod close to the airbag is configured to be in an outwardly convex shape.

7. The multi-coal seam gas extraction drilling and grouting sealing equipment according to claim 1, characterized in that: A tightenable round hole is provided in the middle of the first sealing bag and the second sealing bag. A slurry return pipe is fixedly connected to the upper end of one side of the first sealing bag, and the slurry return pipe is communicated with the grouting cavity.

8. The coal seam drilling and grouting process of the multi-coal seam gas extraction drilling and grouting sealing equipment according to claim 1 is characterized in that: The above-mentioned coal seam drilling and grouting process includes the following steps: S1. First, use drilling equipment to drill a coal seam hole of a certain size at a specified location in the coal seam; S2. Afterwards, the sealing device is assembled and installed in the coal seam drill hole; S3, connecting the grouting part to the grouting pump and injecting slurry into the grouting cavity; S4. Then separate the connecting pipe fittings and the diversion pipe fittings.

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