A goaf gas continuous and convenient extraction protection device

Abstract

The present invention provides a protective device for continuous and convenient gas extraction in goafs, which belongs to the technical field of coal mine gas extraction. The front end of the extraction pipeline is provided with an anti-blocking module, and the front end of the anti-blocking module is provided with a stone pusher. The present invention arranges multiple groups of extraction pipelines in the goaf for automated extraction. During the extraction process, three groups of stone block semi-rings with successively larger radii are used to block the coal slag therein from falling, and the slag falls to the outside through the rock drop pipe groove to prevent the extraction pipeline from being blocked; multiple groups of buffer spring racks and rubber buffer columns are used to buffer the vertical force to prevent the slag from being crushed, and at the same time, the anti-tilt springs are used to link and fix the devices used for supporting and fixing, thereby buffering the lateral force and preventing the equipment from tipping over to the left and right; when the falling objects block the extraction pipeline, the stone pusher directly pushes away the loose and light falling objects. When the heavy objects are too heavy to be pushed away, the stone-striking micro drill is started to crush the falling objects and push them away, thereby preventing the falling objects from clogging the extraction pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine gas extraction, and specifically to a protective device for continuous and convenient gas extraction in goaf areas. Background Art

[0002] Coal has always occupied a dominant position in the current energy structure. Coal seams typically lie 300 to 500 meters underground, so coal mining takes place underground, creating a relatively harsh environment. Coalbed methane (CBM) is one of the major hazards threatening coal production safety. CBM is a byproduct of coal formation, stored in the coal seams in an adsorbed state. The main component of CBM is methane, a clean energy source. However, when methane concentrations in coal seams are too high, it can significantly reduce the oxygen content in the air, causing suffocation. Methane is also highly flammable and can form explosive mixtures with air, posing a risk of combustion and explosion when exposed to heat sources and open flames. Therefore, developing and utilizing CBM can not only fully utilize underground gas resources, but also prevent and control gas hazards, improve the coal production environment, and ultimately increase economic efficiency.

[0003] During the actual mining process, in addition to the coal seam gas produced in the coal seam being mined, there will also be gas remaining in the goaf area near the coal seam being mined because the coal mine has been mined out. These gases will flow to the working face adjacent to the coal seam, thereby posing a threat to coal mining.

[0004] During the coal mining operation in coal mines, gas in the coal seam will be released. Part of the gas will be discharged along with the coal transportation and underground ventilation, while part of the gas will remain in the goaf and store and accumulate in the goaf, increasing the gas concentration and posing a great safety hazard.

[0005] How to prevent and eliminate gas accidents is a very important research topic.

[0006] The patent application with publication number CN106437632B provides a method for extracting gas from old goafs in coal mines. A group of extraction boreholes are designed for each goaf. The extraction borehole opening position is located near the closed wall with relatively low air pressure, and the drilling end position is located in the "O" ring of the roof cracks in the upper part of the goaf where gas is enriched. Water is used for deslagging during drilling construction, and the water deslagging method is used to determine whether the borehole has been drilled into the "O" ring of the roof cracks. Temporary air control facilities are set at different positions on both sides of the old goaf to adjust the air pressure difference in the closed walls on both sides, thereby promoting the flow of gas from the goaf to the extraction borehole side. Safety monitoring facilities and powder spray explosion suppression devices are set in the extraction pipeline to improve the safety of gas extraction in the old goaf. The gas extraction method provided by the present invention drills holes in the old goaf underground in the production mine, reducing the danger of gas leakage from the old goaf into the tunnel space, while turning waste into treasure and increasing the utilization of gas resources.

[0007] The patent application with publication number CN110552735B provides a method and system for the combined extraction of coal seam gas and gas in adjacent goafs. A horizontal directional well is formed by extending a horizontal directional borehole set in the coal seam gas layer to the ground, and a vertical goaf surface well is formed by extending a horizontal docking well and a conventional directional well in the adjacent goaf to the ground. The control gate valve set between the horizontal directional well and the vertical goaf surface well is connected, and the gas extraction pump connected to the existing gas extraction pipeline in the coal mine is used to directly transport the gas to the gas gathering station without adding additional work. Using the aforementioned extraction method, coal seam gas and gas in adjacent goafs are extracted together, saving manpower and material resources and reducing costs. Furthermore, the combined extraction is carried out from underground, and the existing extraction pipelines in the underground coal mine tunnels can be used to directly transport the extracted gas to the gas gathering station, and there is no problem of occupying land.

[0008] While the above technical solutions can, to a certain extent, facilitate gas extraction from goafs and prevent excessive gas concentrations, certain issues still exist. First, goafs are areas where coal has been mined and lack dedicated personnel for real-time management. When gas concentrations are abnormal, it's difficult to effectively extract and reduce the concentration and ensure safety. Second, heavy objects like rocks and slag can easily fall from high places like the goaf roof, damaging extraction equipment. Third, falling objects can easily block the gas extraction pipe openings, reducing extraction efficiency.

[0009] In summary, it is necessary to improve the existing goaf gas equipment. Summary of the Invention

[0010] In order to comprehensively solve the above problems, especially to address the shortcomings of the existing technology, the present invention provides a continuous and convenient gas extraction protection device for goafs, which can comprehensively solve the problems of goaf gas not being able to be extracted in a timely and effective manner, heavy objects falling and damaging equipment, and heavy objects blocking the extraction pipeline openings.

[0011] To achieve the above objectives, the present invention adopts the following technical means:

[0012] The present invention provides a protective device for continuous and convenient gas extraction in a goaf, comprising a goaf, wherein a first extraction pipeline is provided inside the goaf, and the first extraction pipeline is connected to an external extraction auxiliary device, a second extraction pipeline is provided at the front end of the first extraction pipeline, a third extraction pipeline is provided on the upper part of the second extraction pipeline, a fourth extraction pipeline is provided at the front end of the third extraction pipeline, and an extraction pipeline is provided at the front end of the fourth extraction pipeline; an anti-blocking module is provided at the front end of the anti-blocking module, a stone pushing plate is provided at the front end, gas concentration sensors and laser sensors are symmetrically embedded on both sides of the front end of the stone pushing plate, and a stone-striking micro drill is provided in the middle of the stone pushing plate; a protective cover is provided at the top of the second extraction pipeline, a buffer telescopic frame and a second support frame are respectively provided at the bottom of the protective cover, and the second support frame is inside the buffer telescopic frame, a rubber buffer column is provided on the upper part of the second support frame, a first anti-dumping spring is provided between one group of the second support frames and one group of the buffer telescopic frames, and the two groups of the second support frames are connected by a second anti-dumping spring.

[0013] Furthermore, the third extraction pipeline is an inverted U-shaped pipeline with a first rockfall pipe trough on the top, and the second rockfall pipe trough, the third rockfall pipe trough and the fourth rockfall pipe trough are provided at the bottom from left to right. The extraction pipeline is an L-shaped pipeline, and a fifth rockfall pipe trough is provided at the corner of the L-shaped pipeline.

[0014] Furthermore, the interior of the fourth extraction pipeline is provided with a first stone baffle half ring, a second stone baffle half ring and a third stone baffle half ring from left to right, and a second rock drop pipe groove is provided directly below the first stone baffle half ring, a third rock drop pipe groove is provided directly below the second stone baffle half ring, and a fourth rock drop pipe groove is provided directly below the third stone baffle half ring.

[0015] Furthermore, a base frame is provided at the rear of the anti-blocking module, the base frame is connected to three groups of support connecting frames, and the base frame is fixedly connected to the extraction pipeline through the support connecting frames, and a small hydraulic pump is provided at the front end of the base frame.

[0016] Furthermore, a hydraulic telescopic frame is provided at the front end of the small hydraulic pump, a support plate is provided at the front end of the hydraulic telescopic frame, and four sets of stabilizing frames are provided on the upper part of the hydraulic telescopic frame, one end of which is connected to the front end of the hydraulic telescopic frame and the other end is fixedly connected to the support plate.

[0017] Furthermore, four groups of telescopic top frames are provided on the four sides of the front end of the support plate, and a top frame telescopic spring frame is provided inside the telescopic top frame. A pushing stone plate is fixedly installed at the front end of the telescopic top frame, and gas concentration sensors and laser sensors are symmetrically embedded on both sides of the front end of the pushing stone plate.

[0018] Furthermore, a driving motor is provided in the middle position of the front end of the support plate, a driving shaft is provided at the front end of the driving motor, a stone-strike micro drill is installed at the front end of the driving shaft, and the stone-strike micro drill passes through the stone pushing plate. In the initial state, the stone-strike micro drill does not exceed the stone pushing plate.

[0019] Furthermore, buffer side plates are provided around the bottom of the protective cover, a buffer bottom plate is provided at the bottom of the buffer side plates, a first buffer spring frame is provided between the buffer side plates and the buffer bottom plate, and a second buffer spring frame is provided between the protective cover and the buffer bottom plate.

[0020] Furthermore, a rubber buffer column is connected to the bottom of the protective cover, and the rubber buffer column passes through the buffer bottom plate and is connected to the second support frame at its bottom. A support frame plate is provided at the bottom of the second support frame, and a support column is provided at the bottom of the support frame plate. The buffer telescopic frame is directly installed on the upper part of the support column, and the bottom of the support column is connected to the second extraction pipeline.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Automated gas monitoring and extraction. This system arranges multiple extraction pipelines at intervals based on the size of the goaf. Gas concentration sensors are installed in the extraction pipelines and transmit data to equipment underground. When the gas concentration reaches a critical value, an external extraction auxiliary device is activated, initiating automated extraction.

[0023] 2. Prevent coal slag from clogging the extraction pipeline during extraction. During the extraction process, the present invention uses three groups of stone baffle semi-rings with successively larger radii to block the coal slag from falling, which then falls to the outside through the rockfall pipe slot, preventing it from clogging the extraction pipeline.

[0024] 3. Prevent fallen objects from clogging the extraction pipeline. If fallen objects happen to fall in front of the extraction pipeline, the laser sensor will detect the situation in real time during the extraction operation. If there is a blockage, the anti-blocking module will be activated. The stone pusher will directly push away the loose and light fallen objects. If the heavy objects are too heavy to push away, the stone micro-drill will be activated to crush the fallen objects and push them away, thus preventing the fallen objects from clogging the extraction pipeline and affecting the extraction effect.

[0025] 4. Prevent falling objects from damaging the equipment. This invention uses multiple groups of buffer spring racks and rubber buffer columns at the bottom of the protective cover to buffer the vertical force and prevent it from being crushed. At the same time, the anti-dumping springs between the second support frame and the buffer telescopic frame link and fix the supporting and fixing devices, thereby buffering the lateral force and preventing the equipment from tipping over. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 2. It is a schematic structural diagram of a goaf gas continuous and convenient extraction protection device according to an embodiment of the present invention;

[0027] Figure 2 This is a front view of a goaf gas continuous and convenient extraction protection device according to an embodiment of the present invention;

[0028] Figure 3 This is a right view of a goaf gas continuous and convenient extraction protection device according to an embodiment of the present invention;

[0029] Figure 4 This is a partial structural diagram of a goaf gas continuous and convenient extraction protection device according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic structural diagram of an extraction pipeline in an embodiment of the present invention;

[0031] Figure 6 This is a schematic structural diagram of an anti-blocking module according to an embodiment of the present invention;

[0032] Figure 7 This is a front view of the anti-blocking module in an embodiment of the present invention;

[0033] Figure 8 This invention Figure 7 A partial enlarged view of the middle part;

[0034] Figure 9 is a schematic diagram of a protective structure in an embodiment of the present invention;

[0035] Figure 10 is a front view of a protective structure according to an embodiment of the present invention;

[0036] Figure 11 is a cross-sectional view of an anti-blocking module according to an embodiment of the present invention;

[0037] Figure 12 Schematic diagram of the internal structure of the fourth extraction pipeline in an embodiment of the present invention;

[0038] Figure 13 It is a cross-sectional view of the fourth extraction pipeline in an embodiment of the present invention.

[0039] In the picture:

[0040] 1. First extraction pipeline; 2. Second extraction pipeline; 3. Third extraction pipeline; 4. Fourth extraction pipeline; 5. Extraction pipeline; 6. Protective cover; 7. Support column; 8. Support frame plate; 9. Goaf; 31. First rockfall pipe trough; 41. Second rockfall pipe trough; 42. Third rockfall pipe trough; 43. Fourth rockfall pipe trough; 44. First stone baffle half ring; 45. Second stone baffle half ring; 46. Third stone baffle half ring; 51. Fifth rockfall pipe trough; 52. Anti-blocking module; 61. Buffer side plate; 62. Buffer bottom plate; 63. Second buffer spring frame; 64. First buffer Impact spring frame; 65. Rubber buffer column; 66. Second support frame; 67. Buffer telescopic frame; 68. Second anti-dump spring; 69. First anti-dump spring; 521. Base frame; 522. Support connecting frame; 523. Small hydraulic pump; 524. Hydraulic telescopic frame; 525. Support plate; 526. Telescopic top frame; 527. Stone pushing plate; 528. Drive motor; 529. Drive shaft; 530. Stone-strike micro drill; 5241. Stabilizing frame; 5261. Top frame telescopic spring frame; 5271. Gas concentration sensor; 5272. Laser sensor. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings: Example

[0042] As attached Figure 1 To the attached Figure 4 As shown, in one embodiment of the present invention, a protective device for continuous and convenient gas extraction in goaf includes a goaf 9, a first extraction pipeline 1 is provided inside the goaf 9, and the first extraction pipeline 1 is connected to an external extraction auxiliary device, a second extraction pipeline 2 is provided at the front end of the first extraction pipeline 1, a third extraction pipeline 3 is provided on the upper part of the second extraction pipeline 2, and the third extraction pipeline 3 is an inverted U-shaped pipeline, a fourth extraction pipeline 4 is provided at the front end of the third extraction pipeline 3, and an extraction pipe 5 is provided at the front end of the fourth extraction pipeline 4, and the fourth extraction pipeline 4 is provided at the front end, and the L-shaped pipeline.

[0043] As attached Figure 6 To the attached Figure 10 As shown, the front end of the extraction pipeline 5 is provided with an anti-blocking module 52, the front end of the anti-blocking module 52 is provided with a stone pushing plate 527, and the middle of the stone pushing plate 527 is provided with a stone-strike micro drill 530; the top of the second extraction pipeline 2 is provided with a protective cover 6, and the bottom of the protective cover 6 is respectively provided with a buffer telescopic frame 67 and a second support frame 66, and the second support frame 66 is inside the buffer telescopic frame 67, and a rubber buffer column 65 is provided on the upper part of the second support frame 66, and a first anti-dumping spring 69 is provided between a group of the second support frames 66 and a group of the buffer telescopic frames 67, and a second anti-dumping spring 68 is passed between the two groups of the second support frames 66.

[0044] As attached Figure 4 To the attached Figure 5 As shown, the top of the third extraction pipeline 3 is provided with a first rockfall pipe groove 31, the bottom of the fourth extraction pipeline 4 is provided with a second rockfall pipe groove 41, a third rockfall pipe groove 42 and a fourth rockfall pipe groove 43 from left to right, and the L-shaped extraction pipeline 5 is provided with a fifth rockfall pipe groove 51 at its corner.

[0045] In this embodiment, the gas is extracted into the extraction pipeline, and the slag carried in the gas flow passes through three groups of successively larger first baffle half rings 44, second baffle half rings 45 and third baffle half rings 46, and the slag is blocked and falls. Figure 12 To the attached Figure 13 , and is discharged through multiple sets of rockfall pipe troughs.

[0046] Furthermore, during the protection process, in order to achieve the effect of vertical buffering protection, the first level of buffering protection is achieved by the buffering side plate 61 and the first buffering spring frame 64 at the bottom, the second level of protection is achieved by the buffering bottom plate 62 and the second buffering spring frame 63, and the third level of protection is formed between the buffering telescopic frame 67 and the rubber buffer column 65.

[0047] Furthermore, in order to achieve the effect of lateral buffering to prevent tipping, a linkage buffer structure is formed by multiple groups of first anti-tip springs 69 and second anti-tip springs 68 between the buffer telescopic frame 67 and the rubber buffer column 65 to reduce the lateral force. Example

[0048] As attached Figure 3 To the attached Figure 8 , Attachment Figure 12 and attached Figure 13 As shown, in one embodiment of the present invention, specifically, the interior of the fourth extraction pipeline 4 is provided with a first stone baffle semi-ring 44, a second stone baffle semi-ring 45 and a third stone baffle semi-ring 46 from left to right, and a second rock drop pipe groove 41 is provided directly below the first stone baffle semi-ring 44, a third rock drop pipe groove 42 is provided directly below the second stone baffle semi-ring 45, and a fourth rock drop pipe groove 43 is provided directly below the third stone baffle semi-ring 46; the rear part of the anti-blocking module 52 is provided with a base frame 521, and three groups of supporting connecting frames 522 are provided on four sides of the base frame 521, and the base frame 521 is fixedly connected to the extraction pipeline 5 through the supporting connecting frames 522, and a small hydraulic pump 523 is provided at the front end of the base frame 521.

[0049] As attached Figure 4 and attached Figure 10As shown, the front end of the small hydraulic pump 523 is provided with a hydraulic telescopic frame 524, the front end of the hydraulic telescopic frame 524 is provided with a support plate 525, and the upper part of the hydraulic telescopic frame 524 is provided with four groups of stabilizing frames 5241, one end of which is connected to the front end of the hydraulic telescopic frame 524, and the other end is fixedly connected to the support plate 525; four groups of telescopic top frames 526 are provided on the four sides of the front end of the support plate 525, and the top frame telescopic spring frame 526 is provided inside the telescopic top frame 526. It is equipped with a stone pushing plate 527, and gas concentration sensors 5271 and laser sensors 5272 are symmetrically embedded on both sides of the front end of the stone pushing plate 527; a driving motor 528 is provided in the middle position of the front end of the support plate 525, and a driving shaft 529 is provided at the front end of the driving motor 528, and a stone-strike micro drill 530 is installed at the front end of the driving shaft 529, and the stone-strike micro drill 530 passes through the stone pushing plate 527. In the initial state, the stone-strike micro drill 530 does not exceed the stone pushing plate 527.

[0050] As attached Figure 1 To the attached Figure 3 , Attachment Figure 9 and attached Figure 11 As shown, buffer side plates 61 are provided around the bottom of the protective cover 6, a buffer bottom plate 62 is provided at the bottom of the buffer side plates 61, a first buffer spring frame 64 is provided between the buffer side plates 61 and the buffer bottom plate 62, and a second buffer spring frame 63 is provided between the protective cover 6 and the buffer bottom plate 62; a rubber buffer column 65 is connected to the bottom of the protective cover 6, and the rubber buffer column 65 passes through the buffer bottom plate 62 and is connected to the second support frame 66 at its bottom, a support frame plate 8 is provided at the bottom of the second support frame 66, a support column 7 is provided at the bottom of the support frame plate 8, and the buffer telescopic frame 67 is directly installed on the upper part of the support column 7, and the bottom of the support column 7 is connected to the second extraction pipeline 2.

[0051] In this embodiment, during the extraction process, the laser sensor 5272 starts to emit laser. When an object blocks the front end of the extraction pipe 5 at a close distance, the emitted laser is quickly reflected. After receiving the information, the small hydraulic pump 523 is controlled to start, and the hydraulic telescopic frame 524 is unfolded. The hydraulic telescopic frame 524 drives the front support plate 525 and the stone push plate 527 to move forward synchronously.

[0052] Furthermore, when the object at the front end is lighter, the pushing plate 527 directly pushes the object away. If the object is heavier and cannot be pushed away directly, the support plate 525 continues to apply force to the telescopic top frame 526 under the action of the hydraulic telescopic frame 524, and the pushing plate 527 cannot push the object. In this way, the top frame telescopic spring frame 5261 in the telescopic top frame 526 is subjected to a continuously increasing force and is compressed. At this time, the stone-strike micro drill 530 exceeds the stone-strike micro drill 530. At the same time, the stone-strike micro drill 530, driven by the driving motor 528, crushes the object into a loose structure, and is then pushed away under the action of the pushing plate 527.

[0053] Working principle:

[0054] The operating personnel arrange appropriate extraction pipelines at intervals in the goaf 9 according to the size of the space, and the extraction pipelines are connected to the external extraction auxiliary device.

[0055] The gas concentration sensor 5271 monitors the gas concentration information of the goaf 9 in real time and transmits it to the equipment on the well. When the concentration reaches the warning value, the external extraction auxiliary device is controlled to start extracting gas.

[0056] During the extraction process, the laser sensor 5272 starts to emit laser. When an object blocks the front end of the extraction pipe 5 at a close distance, the emitted laser is quickly reflected. After receiving the information, the small hydraulic pump 523 is controlled to start, and the hydraulic telescopic frame 524 is unfolded. The hydraulic telescopic frame 524 drives the front support plate 525 and the pushing stone plate 527 to move forward synchronously. When the mass of the object at the front end is light, the pushing stone plate 527 directly pushes the object away. If the object is heavy and cannot be pushed away directly, the support plate 525 continues to apply force to the telescopic top frame 526 under the action of the hydraulic telescopic frame 524, and the pushing stone plate 527 cannot push the object. In this way, the top frame telescopic spring frame 5261 in the telescopic top frame 526 is subjected to increasing force and is compressed. At this time, the stone-strike micro drill 530 exceeds the stone-strike micro drill 530. At the same time, the stone-strike micro drill 530, driven by the drive motor 528, crushes the object into a loose structure, and is now pushed away under the action of the pushing stone plate 527.

[0057] The gas is extracted and enters the extraction pipeline. The slag carried in the gas flow passes through three groups of successively larger first baffle half rings 44, second baffle half rings 45 and third baffle half rings 46. The slag is blocked by them and falls down. Figure 12 To the attached Figure 13 , and is discharged through multiple sets of rockfall pipe troughs.

[0058] At the same time, the protective cover 6 covers the entire extraction device to prevent falling rocks from directly hitting the extraction device and causing damage. Specifically, during the protection process, first, the vertical buffering protection effect is achieved, including the first buffering protection of the buffer side plate 61 and the first buffer spring frame 64 at the bottom, and the second buffering protection of the buffer bottom plate 62 and the second buffer spring frame 63, as well as the third protection formed between the buffer telescopic frame 67 and the rubber buffer column 65; second, the lateral buffering effect of preventing tipping is achieved, and a linkage buffer structure is formed between the buffer telescopic frame 67 and the rubber buffer column 65 to reduce lateral force.

[0059] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0060] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A goaf gas continuous and convenient extraction protection device, comprising a goaf (9), wherein a first extraction pipeline (1) is provided inside the goaf (9), and the first extraction pipeline (1) is connected to an external extraction auxiliary device, characterized in that: A second extraction pipeline (2) is provided at the front end of the first extraction pipeline (1), a third extraction pipeline (3) is provided on the upper part of the second extraction pipeline (2), a fourth extraction pipeline (4) is provided at the front end of the third extraction pipeline (3), and an extraction pipe (5) is provided at the front end of the fourth extraction pipeline (4); The front end of the extraction pipe (5) is provided with an anti-blocking module (52), the front end of the anti-blocking module (52) is provided with a stone pushing plate (527), the front ends of the stone pushing plate (527) are symmetrically embedded with gas concentration sensors (5271) and laser sensors (5272), and the middle of the stone pushing plate (527) is provided with a stone-striking micro drill (530); A protective cover (6) is provided on the top of the second extraction pipeline (2), and a buffer telescopic frame (67) and a second support frame (66) are provided at the bottom of the protective cover (6), and the second support frame (66) is inside the buffer telescopic frame (67). A rubber buffer column (65) is provided on the upper part of the second support frame (66), and a first anti-dumping spring (69) is provided between a group of the second support frames (66) and a group of the buffer telescopic frames (67). The two groups of the second support frames (66) are connected by a second anti-dumping spring (68).

2. The goaf gas continuous and convenient extraction protection device according to claim 1 is characterized by: The third extraction pipeline (3) is an inverted U-shaped pipeline, with a first rockfall pipe groove (31) provided on the top; the fourth extraction pipeline (4) is provided with a second rockfall pipe groove (41), a third rockfall pipe groove (42) and a fourth rockfall pipe groove (43) in sequence from left to right at the bottom; the extraction pipeline (5) is an L-shaped pipeline, with a fifth rockfall pipe groove (51) provided at the corner of the L-shaped pipeline.

3. A goaf gas continuous and convenient extraction protection device according to claim 2, characterized in that: The fourth extraction pipeline (4) is provided with a first stone baffle semi-ring (44), a second stone baffle semi-ring (45) and a third stone baffle semi-ring (46) with gradually increasing radius from left to right, and a second rock drop pipe groove (41) is provided directly below the first stone baffle semi-ring (44), a third rock drop pipe groove (42) is provided directly below the second stone baffle semi-ring (45), and a fourth rock drop pipe groove (43) is provided directly below the third stone baffle semi-ring (46).

4. The device for continuous and convenient gas extraction protection in goaf according to claim 1 is characterized in that: A base frame (521) is provided at the rear of the anti-blocking module (52), the base frame (521) is connected to three groups of support connecting frames (522), and the base frame (521) is fixedly connected to the extraction pipeline (5) through the support connecting frames (522), and a small hydraulic pump (523) is provided at the front end of the base frame (521).

5. A goaf gas continuous and convenient extraction protection device according to claim 4, characterized in that: A hydraulic telescopic frame (524) is provided at the front end of the small hydraulic pump (523), a support plate (525) is provided at the front end of the hydraulic telescopic frame (524), and four sets of stabilizing frames (5241) are provided on the upper portion of the hydraulic telescopic frame (524), one end of each stabilizing frame being connected to the front end of the hydraulic telescopic frame (524) and the other end being fixedly connected to the support plate (525).

6. A goaf gas continuous and convenient extraction protection device according to claim 5, characterized in that: Four sets of telescopic top frames (526) are provided on the four sides of the front end of the support plate (525), and a top frame telescopic spring frame (5261) is provided inside the telescopic top frame (526). A stone pushing plate (527) is fixedly installed on the front end of the telescopic top frame (526), ​​and a gas concentration sensor (5271) and a laser sensor (5272) are symmetrically embedded on both sides of the front end of the stone pushing plate (527).

7. A goaf gas continuous and convenient extraction protection device according to claim 6, characterized in that: A driving motor (528) is provided at the middle position of the front end of the support plate (525), a driving shaft (529) is provided at the front end of the driving motor (528), a stone-striking micro drill (530) is installed at the front end of the driving shaft (529), and the stone-striking micro drill (530) passes through the stone-pushing plate (527). In an initial state, the stone-striking micro drill (530) does not exceed the stone-pushing plate (527).

8. The device for continuous and convenient gas extraction protection in goaf according to claim 1 is characterized in that: Buffer side plates (61) are provided around the bottom of the protective cover (6), a buffer bottom plate (62) is provided at the bottom of the buffer side plates (61), a first buffer spring frame (64) is provided between the buffer side plates (61) and the buffer bottom plate (62), and a second buffer spring frame (63) is provided between the protective cover (6) and the buffer bottom plate (62).

9. A goaf gas continuous and convenient extraction protection device according to claim 8, characterized in that: The bottom of the protective cover (6) is connected to a rubber buffer column (65), and the rubber buffer column (65) passes through the buffer bottom plate (62) and is connected to the second support frame (66) at the bottom thereof, the second support frame (66) is provided with a support frame plate (8) at the bottom, the support frame plate (8) is provided with a support column (7) at the bottom, and the buffer telescopic frame (67) is directly installed on the upper part of the support column (7), and the bottom of the support column (7) is connected to the second extraction pipeline (2).

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