A device and method for discharging gas by vibration while drilling

Abstract

The present application discloses a vibration gas drainage device and method while drilling, which relates to the field of tunnel engineering. The vibration gas drainage device while drilling includes a casing, a central pipe, a vibration mechanism and a driving mechanism; the vibration gas drainage device while drilling of the present application realizes the radial telescopic movement of the vibration mechanism through a driving assembly and an elastic member, and promotes gas desorption through the vibration of the vibration mechanism. The vibration mechanism adopts the form of an arc-shaped contact plate and a vibration rod. A larger contact area is achieved through the circumferentially extending arc-shaped contact plate, and the vibration rod provides a higher frequency of vibration, expanding the effective drainage radius and allowing more energy input to cause pressure relief of the coal seam near the hole, increasing the gas concentration in the hole, promoting the desorption and seepage of coal seam gas, and enhancing the efficiency of gas drainage; the present application also discloses a gas drainage method, which can effectively and fully release the gas in the coal seam.

Description

Technical Field

[0001] This application relates to the field of tunnel engineering, and particularly to a vibration gas drainage device and method during drilling. Background Art

[0002] With the strong promotion of national infrastructure construction, the number of tunnel engineering constructions is increasing continuously, and tunnels passing through coal-bearing strata are becoming more and more common. Tunnels passing through coal seams need to carry out coal uncovering and outburst prevention construction during the construction process to ensure the safety of tunnel construction under normal gas outburst conditions.

[0003] The existing vibration gas drainage devices have the following problems: 1. It is necessary to retract the drilling equipment first and then put the vibration device for gas drainage into the hole, and the operation process is complex and time-consuming; 2. The vibration contact area is limited and effective release cannot be achieved. Summary of the Invention

[0004] The embodiments of this application provide a vibration gas drainage device and method during drilling to solve the problems of complex gas desorption operation process and low efficiency.

[0005] In a first aspect, this application provides a vibration gas drainage device during drilling, including a pipe sleeve, a central pipe, a vibration mechanism, and a driving mechanism; the pipe sleeve is provided with an activity groove along its radial direction; the central pipe is arranged inside the pipe sleeve; the vibration mechanism is slidably arranged in the activity groove along the radial direction, and the vibration mechanism can be attached to the hole wall; the vibration mechanism includes a main body block, an arc-shaped contact plate, and a vibration rod; the main body block is slidably arranged in the activity groove; the arc-shaped contact plate is arranged at one end of the main body block facing away from the central pipe, and the arc-shaped contact plate can be attached to the hole wall; the vibration rod is arranged in the main body block or the arc-shaped contact plate and is used to drive the arc-shaped contact plate to vibrate; the driving mechanism includes a driving component and an elastic member; the driving component is respectively connected to the central pipe and the vibration mechanism and is used to drive the vibration mechanism to move in the radial direction; both ends of the elastic member are respectively connected to the central pipe and the vibration mechanism, and the telescopic direction of the elastic member is configured as the radial direction of the pipe sleeve.

[0006] In a second aspect, this application provides a gas drainage method, including:

[0007] Connect the vibration gas drainage device during drilling to the drill pipe through threaded connection and drill towards the target coal seam with the drill bit, and stop drilling after entering the coal seam;

[0008] Start the vibration gas drainage device during drilling, control the driving member to loosen the pull rope, the arc-shaped contact plate of the vibration mechanism expands radially outwards under the elastic force of the elastic member until the arc-shaped contact plate tightly adheres to the inner hole wall of the hole, start the vibration rod to vibrate, the vibration load is transmitted to the coal seam through the arc-shaped contact plate, and the gas in the coal seam is quickly desorbed under the vibration load and enters the hole through the seepage holes on the arc-shaped contact plate;

[0009] Monitor the gas concentration at the orifice of the borehole. After the gas concentration drops to the target value, start the driving member. The output shaft of the driving member rotates to tighten the pull rope and drive the arc-shaped contact plate of the vibration mechanism to approach the pipe sleeve radially. Finally, the vibration-assisted gas drainage device during drilling is pushed out of the hole together with the drill pipe.

[0010] The vibration-assisted gas drainage device and method during drilling of the present application at least have the following beneficial effects:

[0011] The drainage device of the present application starts from the aspect of enhancing the permeability of coal seam gas. Through the driving component and the elastic member, the vibration mechanism realizes the telescopic movement in the radial direction. The elastic member can press the vibration mechanism against the hole wall, and the vibration mechanism vibrates to promote gas desorption. After the desorption is completed, the driving component can drive the vibration mechanism to approach the pipe sleeve radially to reduce the overall outer diameter of the vibration-assisted gas drainage device during drilling and enable it to smoothly withdraw from the hole. The vibration mechanism of the present application adopts the form of an arc-shaped contact plate and a vibrating rod. A larger contact area is achieved through the circumferentially extending arc-shaped contact plate, and the vibrating rod provides a higher frequency of vibration, expanding the effective drainage radius and allowing more energy input to cause pressure relief in the coal seam near the hole, increasing the gas concentration in the hole, promoting the desorption and seepage of coal seam gas, and enhancing the efficiency of gas drainage. Description of the Drawings

[0012] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0013] Figure 1 is the structural schematic diagram of the vibration-assisted gas drainage device during drilling in the present application;

[0014] Figure 2 is the top view of the vibration-assisted gas drainage device during drilling in the present application;

[0015] Figure 3 is Figure 2 the A-A view in

[0016] Figure 4 is the structural schematic diagram of the vibration mechanism in the present application (showing the hidden lines);

[0017] Figure 5 is the schematic diagram of the vibration-assisted gas drainage device during drilling in the present application propping against the hole wall (hiding the elastic member);

[0018] Figure 6 is the schematic diagram of the driving member in the present application;

[0019] Figure 7 It is a schematic diagram of the in - drill vibration gas drainage device during operation in this application;

[0020] Figure 8 It is a flow chart of the gas drainage method in this application;

[0021] The description of the reference numerals is as follows:

[0022] 100, casing; 110, movable groove; 120, male thread; 130, female thread;

[0023] 200, central pipe;

[0024] 300, vibration mechanism; 310, main body block; 311, mounting blind hole; 312, end cover; 320, arc contact plate; 321, seepage hole; 322, protrusion; 330, vibration rod;

[0025] 400, drive mechanism; 410, drive assembly; 411, drive part; 4111, output shaft; 412, pull rope; 420, elastic part;

[0026] 500, hole wall;

[0027] 600, drill bit;

[0028] 700, drill pipe. Detailed implementation manners

[0029] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the purpose, technical solutions and advantages of this application more clear and understandable, the following further describes this application in combination with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application, rather than limiting this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of this application by showing examples of this application.

[0030] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0031] As Figure 1 and Figure 2 shown, this embodiment discloses a downhole vibration gas drainage device and method. First, the downhole vibration gas drainage device of this embodiment will be introduced. The downhole vibration gas drainage device includes a casing 100, a central pipe 200, a vibration mechanism 300, and a driving mechanism 400;

[0032] As Figure 1 shown, the casing 100 is cylindrical in shape, and the two axial ends of the casing 100 are respectively connected to a drill bit 600 and a drill pipe 700. In some preferred embodiments, a male thread 120 is provided at one axial end of the casing 100, and the male thread 120 is threadedly connected to the drill bit 600. A female thread 130 is provided at the other axial end of the casing 100, and the female thread 130 is threadedly connected to one end of the drill pipe 700. The casing 100 can be part of the drill pipe 700 and transmit torque between the drill pipe 700 and the drill bit 600. The threaded connection method can achieve quick connection and has a certain sealing performance.

[0033] As Figure 1 shown, in this embodiment, the casing 100 is provided with a movable groove 110 along its radial direction. The movable groove 110 penetrates the side wall of the casing 100 along the radial direction, and the movable groove 110 has a certain length along the axial direction of the casing 100. The specific length value is selected according to the actual situation. The movable groove 110 of this embodiment can provide an avoidance position for the vibration mechanism 300 and can play a radial guiding role for the main body block 310 of the vibration mechanism 300.

[0034] As Figure 3As shown, in some preferred embodiments, there are multiple movable slots 110. The multiple movable slots 110 are arranged at equal intervals along the circumferential direction of the sleeve 100. In this embodiment, it is illustrated that the number of movable slots 110 is four. The vibration mechanisms 300 are slidably arranged in the movable slots 110 in a one-to-one correspondence. By providing multiple movable slots 110 and vibration mechanisms 300, a large range and large area of vibration can be provided.

[0035] As Figure 3 shown, the central tube 200 is arranged inside the sleeve 100. In this embodiment, the central tube 200 is coaxially and fixedly arranged inside the sleeve 100. The central tube 200 can provide installation positions for the various components of the driving mechanism 400.

[0036] As Figure 3 shown, the vibration mechanism 300 is slidably arranged in the movable slot 110 along the radial direction. The vibration mechanism 300 can move in the radial direction and can move to fit against the hole wall 500. In this embodiment, the vibration mechanism 300 includes a main body block 310, an arc-shaped contact plate 320, and a vibration rod 330. The main body block 310 is slidably arranged in the movable slot 110, that is, the main body block 310 can slide relative to the movable slot 110 in the radial direction of the sleeve 100. The arc-shaped contact plate 320 is arranged at one end of the main body block 310 facing away from the central tube 200. In this embodiment, it is preferably that the arc-shaped contact plate 320 is integrally formed with the main body block 310 to ensure the structural strength. The vibration rod 330 is used to generate vibration and transmit the vibration to the coal seam through the arc-shaped contact plate 320 to promote gas desorption. In this embodiment, the vibration rod 330 can be arranged inside the main body block 310 or the arc-shaped contact plate 320. The vibration rod 330 is used to drive the arc-shaped contact plate 320 to vibrate.

[0037] As Figure 4 shown, in some preferred embodiments, the main body block 310 is provided with a mounting blind hole 311 for mounting the vibration rod 330. The depth direction of the mounting blind hole 311 is configured as the axial direction of the sleeve 100. The vibration rod 330 is arranged in the mounting blind hole 311, and an end cap 312 is arranged at the open end of the mounting blind hole 311. The end cap 312 is threadedly connected to the mounting blind hole 311. After the vibration rod 330 is installed in the mounting blind hole 311, the end cap 312 is threadedly tightened into the mounting blind hole 311, and the end cap 312 presses the vibration rod 330 in the mounting blind hole 311. In this embodiment, the vibration rod 330 can refer to the vibration rod with a built-in battery in the prior art.

[0038] As Figure 4As shown, in some preferred embodiments, the surface of the arc-shaped contact plate 320 facing away from the sleeve 100 is configured as a contact surface capable of fitting with the hole wall 500. This contact surface extends a certain length both circumferentially and axially. The specific length value can be selected according to the actual situation. For example, the arc length of the contact surface in the circumferential direction is configured to be 1 / 3π to 1 / 2π, and the length of the contact surface in the axial direction is configured to be 1 / 3 to 3 / 4 of the axial length of the sleeve.

[0039] As Figure 4 shown, in some preferred embodiments, a plurality of seepage holes 321 are provided on the arc-shaped contact plate 320. Under the vibration load, the seepage holes 321 facilitate the gas to pass through the arc-shaped contact plate 320 and enter the hole. In this embodiment, a plurality of seepage holes 321 are arranged in an array on the arc-shaped contact plate 320.

[0040] As Figure 4 shown, in some preferred embodiments, a plurality of protrusions 322 are provided on the contact surface between the arc-shaped contact plate 320 and the hole wall 500. The protrusions 322 extend in the direction away from the main body block 310 (i.e., radially). The radial height of the protrusions 322 can be selected according to the actual situation, and this embodiment does not limit it. The protrusions 322 can be inserted into the coal seam to increase the vibration contact area, so that the vibration generated by the vibrating rod 330 can be more effectively transmitted to the coal seam through the protrusions 322 to improve the desorption efficiency.

[0041] As Figure 3 shown, the driving mechanism 400 includes a driving component 410 and an elastic member 420; the driving component 410 is respectively connected to the central tube 200 and the vibration mechanism 300, and is used to drive the vibration mechanism 300 to move in the radial direction; both ends of the elastic member 420 are respectively connected to the central tube 200 and the vibration mechanism 300, and the telescopic direction of the elastic member 420 is configured as the radial direction of the sleeve 100.

[0042] Among them, the elastic member 420 is configured as a spring, the telescopic direction of the elastic member 420 is configured as the radial direction, and the elastic member 420 can drive the arc-shaped contact plate 320 of the vibration mechanism 300 to closely fit on the inner hole wall of the hole, so that the arc-shaped contact plate 320 can effectively transmit vibration. Preferably in this embodiment, a first installation groove is provided on the side of the main body block 310 of the vibration mechanism 300 facing the central tube 200, a second installation groove is provided on the outer circumference of the central tube 200, and both ends of the elastic member 420 are respectively fixedly arranged in the first installation groove and the second installation groove. In some preferred embodiments, the number of the elastic members 420 is multiple, and each main body block 310 of the vibration mechanism 300 is correspondingly connected with four elastic members 420. The four elastic members 420 are arranged at intervals along the axial direction of the sleeve 100, and the multiple elastic members 420 can tightly press the arc-shaped contact plate 320 on the inner hole wall at various positions.

[0043] In some other embodiments, the natural frequency of the elastic member 420 matches the frequency generated by the vibrating rod 330, and resonance can occur to amplify the amplitude of the arc-shaped contact plate 320, effectively promoting desorption.

[0044] The driving assembly 410 is used to realize the radial movement of the vibrating mechanism 300 (specifically, the arc-shaped contact plate 320). In some other embodiments, the driving assembly 410 directly uses a telescopic member (such as an electric push rod, etc.) to drive the arc-shaped contact plate 320 to move radially. Although this method is feasible, the vibrating rod 330 may affect the structures such as the telescopic member rigidly connected to it during operation, reducing its service life. Therefore, in this embodiment, the driving assembly 410 preferably adopts the following structural form.

[0045] As Figure 5 shown, the driving assembly 410 includes a driving member 411 and a pulling rope 412. The two ends of the pulling rope 412 are respectively connected to the output shaft 4111 of the driving member 411 and the main body block 310 of the vibrating mechanism 300. When the output shaft 4111 of the driving member 411 rotates, it can drive the main body block 310 and the arc-shaped contact plate 320 to move radially inward close to the tube sleeve 100 or unwind the pulling rope 412, so that the main body block 310 and the arc-shaped contact plate 320 approach the inner hole wall, and further enable the arc-shaped contact plate 320 to closely adhere to the hole wall 500. Among them, the driving member 411 is fixedly arranged on the outer peripheral surface of the central tube 200. One end of the pulling rope 412 is fixed on the output shaft 4111 of the driving member 411 and at least part of the pulling rope 412 is wound around the outer periphery of the output shaft 4111. The other end of the pulling rope 412 is fixed on the main body block 310. In this embodiment, during the operation of the vibrating rod 330, since the main body block 310 and the output shaft 4111 of the driving member 411 are connected by the pulling rope 412 (non-rigid connection), the vibration generated by the vibrating rod 330 will not be directly transmitted to the output shaft 4111 through the main body block 310, which can improve the service life of the driving member 411 and reduce the installation requirements of the driving member 411 on the central tube 200. Because if a rigid installation method is adopted, the vibration will be transmitted to the central tube 200, and a shock-absorbing mechanism needs to be designed between the driving member 411 and the central tube 200.

[0046] As Figure 5 and Figure 6As shown, in some preferred embodiments, there are multiple driving members 411. The multiple driving members 411 are circumferentially fixed on the outer periphery of the central tube 200. In this embodiment, four driving members 411 are illustrated. Each driving member 411 is provided with two output shafts 4111. For example, the driving member 411 is configured as a motor with double output shafts. Two circumferentially adjacent driving members 411 can be used to radially pull the main body block 310 of a vibration mechanism 300. Specifically, the pulling rope 412 has three connection ends. The first connection end of the pulling rope 412 is fixedly connected to the main body block 310, the second connection end is connected to the output shaft 4111 of one driving member 411, and the third connection end is connected to the output shaft 4111 of another driving member 411. When these two adjacent driving members 411 rotate synchronously, the main body block 310 and the arc contact plate 320 can be pulled inward and retracted through the pulling rope 412. Or, when the arc contact plate 320 needs to be brought into contact with the inner hole wall, the output shafts 4111 of two circumferentially adjacent driving members 411 rotate and pay out the pulling rope 412, and the arc contact plate 320 is attached to the inner hole wall under the action of the elastic member 420. It should be noted that the driving member 411 (motor) in this embodiment has a charging function and stores electric energy inside, without the need for external wires.

[0047] In some preferred embodiments, the number of the driving assemblies 410 can be multiple. The multiple driving assemblies 410 are axially spaced along the sleeve 100. Arranging multiple driving assemblies 410 can drive the arc contact plate 320 to smoothly retract inward or extend outward at multiple positions simultaneously.

[0048] This embodiment also discloses a gas emission method, as Figure 7 and Figure 8 shown:

[0049] When the driving face is about 10 m away from the coal seam, stop the construction, conduct on-site investigation, determine the drilling position and hole diameter size, and ensure the accuracy and safety of the drilling position. According to the design requirements and the actual on-site situation, conduct detailed measurement and layout, mark the specific position of the drilling point, and determine the hole spacing and hole angle. Move the drilling vehicle to the working face. During the drilling process, it is necessary to record in detail the starting depth and ending depth of the coal seam, so as to calculate the coal seam thickness, and select a vibration gas emission device with a suitable specification according to different coal seam thicknesses.

[0050] The gas emission method includes the following steps

[0051] Step S100: Connect the downhole vibration gas drainage device to the drill pipe 700 through threaded connection and drill towards the target coal seam with the drill bit 600. Stop drilling after entering the coal seam. Specifically: One end of the sleeve 100 of the downhole vibration gas drainage device is threadedly connected to the drill pipe 700, and the drill bit 600 is threadedly connected to the other end of the sleeve 100. When the drill pipe 700 drills, the sleeve 100 can transmit torque between the drill pipe 700 and the drill bit 600. At the same time, before entering the coal seam, multiple driving members 411 of the driving assembly 410 pull the arc contact plate 320 of the vibration mechanism 300 through the pull rope 412, and at this time, the elastic member 420 is in a compressed state; Judge whether the downhole vibration gas drainage device has entered the coal seam through the water and slag return situation, and stop drilling when the downhole vibration gas drainage device enters the coal seam;

[0052] Step S200: Start the downhole vibration gas drainage device, control the driving member 411 to release the pull rope 412, and the arc contact plate 320 of the vibration mechanism 300 expands radially outward under the elastic force of the elastic member 420 until the arc contact plate 320 closely adheres to the hole wall 500 of the hole. Start the vibrating rod 330 to vibrate, and the vibration load is transmitted into the coal seam through the arc contact plate 320. The gas in the coal seam is quickly desorbed under the vibration load and enters the hole through the seepage holes 321 on the arc contact plate 320. Specifically: The external control system controls the output shaft 4111 of the driving member 411 to rotate and unwind the pull rope 412, so that the arc contact plate 320 gradually approaches the inner hole wall. Finally, the main body block 310 of the vibration mechanism 300 and the arc contact plate 320 are under the action of the elastic member 420, and the arc contact plate 320 is pressed tightly against the inner hole wall; Then start the vibrating rod 330, and the vibrating rod 330 drives the main body block 310 and the arc contact plate 320 to vibrate. Since the arc contact plate 320 is in close contact with the inner hole wall, the vibration of the vibrating rod 330 can be transmitted into the coal seam to promote desorption, and the gas can enter the hole through the seepage holes 321 on the arc contact plate 320. Then the compressed air is discharged from the drill bit 600, carrying the gas in the hole to flow towards the hole mouth and be discharged into the air;

[0053] Step S300: Monitor the gas concentration at the orifice. After the gas concentration drops to the target value, start the driving member 411. The output shaft 4111 of the driving member 411 rotates, thereby tightening the pull rope 412 and driving the arc-shaped contact plate 320 of the vibration mechanism 300 to approach the pipe sleeve 100 radially. Finally, the vibration-assisted gas discharge device follows the drill pipe 700 and is pushed out of the hole. Specifically: During the discharge process, the gas concentration at the orifice is continuously monitored by the sensor. After the gas concentration drops to the target value (e.g., 0.25%), all the driving members 411 work synchronously, and the output shafts 4111 of the driving members 411 rotate synchronously, causing the output shafts 4111 of the driving members 411 to wind up the pull rope 412. The elastic member 420 is gradually compressed, and the main body block 310 and the arc-shaped contact plate 320 gradually deviate from the hole wall 500 radially and approach the pipe sleeve 100. After the overall outer diameter of the vibration-assisted gas discharge device becomes smaller, the vibration-assisted gas discharge device is retracted to the outside of the hole together with the drill pipe 700.

[0054] As described above, only the specific embodiments of the present application are provided. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be repeated here. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present application.

Claims

1. A drilling vibration gas discharge device, characterized in that: It includes a pipe sleeve, a center pipe, a vibration mechanism and a driving mechanism; The sleeve is provided with a movable groove along its radial direction; The central tube is arranged in the tube sleeve; The vibration mechanism is slidably arranged in the movable groove along the radial direction, and the vibration mechanism can be attached to the hole wall; the vibration mechanism includes a main body block, an arc-shaped contact plate and a vibration rod; the main body block is slidably arranged in the movable groove; the arc-shaped contact plate is arranged at one end of the main body block away from the central tube, and the arc-shaped contact plate can be attached to the hole wall; the vibration rod is arranged in the main body block or the arc-shaped contact plate, and is used to drive the arc-shaped contact plate to vibrate; The driving mechanism comprises a driving assembly and an elastic member; the driving assembly is respectively connected to the central tube and the vibration mechanism, and is used to drive the vibration mechanism to move in the radial direction; the two ends of the elastic member are respectively connected to the central tube and the vibration mechanism, and the expansion and contraction direction of the elastic member is configured to be the radial direction of the tube sleeve; The driving assembly includes a driving member and a pull rope, and the driving member is arranged on the central tube; one end of the pull rope is fixedly connected to the output shaft of the driving member, and the other end of the pull rope is connected to the main body block of the vibration mechanism, and the main body block and the arc contact plate are radially retracted and extended by rotating the output shaft of the driving member.

2. The drilling vibration gas discharge device according to claim 1, characterized in that: The two axial ends of the pipe sleeve are respectively threadedly connected with the drill bit and the drill rod.

3. The drilling vibration gas discharge device according to claim 1 or 2, characterized in that: The sleeve is provided with a plurality of movable grooves at intervals along its circumference, and the vibration mechanisms are provided in one-to-one correspondence with the movable grooves.

4. The drilling vibration gas discharge device according to claim 1, characterized in that: The main body block is provided with a mounting blind hole for mounting a vibrating rod, and an end cover is provided at the open end of the mounting blind hole, and the end cover is threadedly connected to the inner wall of the mounting blind hole.

5. The drilling vibration gas discharge device according to claim 4, characterized in that: The arc-shaped contact plate is provided with a plurality of seepage holes in an array.

6. The drilling vibration gas discharge device according to claim 4 or 5, characterized in that: A plurality of protrusions are arranged on the contact surface between the arc-shaped contact plate and the hole wall, and the protrusions extend in a direction away from the main body block.

7. The drilling vibration gas discharge device according to claim 1, characterized in that: The driving assembly includes a plurality of driving members arranged along the circumference of the central tube, each driving member is provided with two output shafts; the pull rope has three connecting ends, the first connecting end of the pull rope is connected to the main body block, and the other two connecting ends are respectively connected to the output shafts of two adjacent driving members.

8. A gas emission method, characterized in that: include: The drilling vibration gas discharge device according to any one of claims 1 to 7 is connected to the drill pipe through a threaded connection and drilled toward the target coal seam along with the drill bit, and the drilling is stopped after entering the coal seam; The drilling vibration gas discharge device is started, and the driving member is controlled to loosen the pull rope. The arc contact plate of the vibration mechanism expands radially outward under the elastic force of the elastic member until the arc contact plate is in close contact with the inner wall of the hole. The vibration rod is started to vibrate, and the vibration load is transmitted to the coal seam through the arc contact plate. The gas in the coal seam is quickly desorbed under the vibration load and enters the hole through the seepage holes on the arc contact plate; Monitor the gas concentration at the hole mouth, and start the drive component when the gas concentration drops to the target value. The output shaft of the drive component rotates to tighten the pull rope and drive the arc contact plate of the vibration mechanism to approach the pipe sleeve radially. Finally, the drilling vibration gas discharge device is pushed out of the hole together with the drill pipe.

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