Protective device for continuously and conveniently extracting gas in goaf

Abstract

The invention provides a protective device for continuous and convenient extraction of goaf gas, and belongs to the technical field of coal mine gas extraction, an anti-blocking module is arranged at the front end of an extraction pipeline, and a stone pushing plate is arranged at the foremost end of the anti-blocking module. According to the method, multiple sets of extraction pipelines are arranged in the goaf, automatic extraction is achieved, in the extraction process, coal cinder in the goaf is blocked and falls off through the three sets of stone blocking plate semi-rings with the radiuses becoming larger in sequence, the coal cinder falls to the outside through the stone falling pipe groove, and the extraction pipelines are prevented from being blocked; the vertical stress of the device is buffered through multiple sets of buffer spring frames and rubber buffer columns to prevent the device from being crushed, and meanwhile devices used for supporting and fixing are linked and fixed through anti-toppling springs, so that the transverse stress of the device is buffered, and the device is prevented from toppling leftwards and rightwards; the falling objects block the extraction pipeline, the stone pushing plate directly pushes away the loose falling objects with light mass, and when the heavy objects are heavy and cannot be pushed away, the stone hitting micro drill bit is started to crush the falling objects and push away the falling objects, so that the falling objects are prevented from blocking 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 extraction of gas from goaf areas. Background Art

[0002] In the current energy structure, coal has always occupied a major position. Coal seams containing coal are generally 300 to 500 meters underground. Therefore, coal mining is carried out underground, and the environment is relatively harsh, and major disasters and accidents occur frequently. Coalbed gas is one of the main disasters that endanger coal production safety. Coalbed gas is a byproduct in the coal formation process and is stored in the coal seam in an adsorbed state. The main component of coalbed gas is methane, which is a clean energy source. However, when the methane concentration in the coal seam is too high, the oxygen content in the air will be significantly reduced, causing suffocation. Methane is flammable and will form an explosive mixture when mixed with air. There is a risk of combustion and explosion when encountering heat sources and open flames. Therefore, the development and utilization of coalbed gas can not only make full use of underground gas resources, but also prevent and control gas disasters, improve the coal production environment, and thus improve economic benefits.

[0003] In 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, thus posing a threat to coal mining.

[0004] During the coal mining operation in coal mines, the 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] Gas accidents are prominent disasters in coal mines, especially in goaf areas. Gas accidents and deaths account for more than 50% of the total number of accidents. 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 opening position of the extraction boreholes is located near the closed wall with relatively low air pressure, and the end position of the boreholes is located in the "O"-shaped ring of the roof cracks where gas is enriched in the upper part of the goaf. Water is used for slag removal during drilling construction, and the water slag removal method is used to determine whether the borehole has been drilled into the "O"-shaped ring of the roof cracks. Temporary wind 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, so as to promote the flow of gas in the goaf to the side of the extraction borehole. 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 in the underground of the production mine, reduces the danger of gas leakage from the old goaf to the tunnel space, and at the same time turns waste into treasure, increasing the utilization of gas resources.

[0007] The patent application with publication number CN110552735B provides a method and system for combined extraction of coal seam gas and gas in adjacent goafs, which extends a horizontal directional borehole set in the coal seam gas layer to the ground to form a horizontal directional well, and a horizontal butt well and a conventional directional well in the adjacent goaf are extended to the ground to form a vertical well on the ground in the goaf, and the control gate valve set between the horizontal directional well and the vertical well on the ground in the goaf is connected, and the gas extraction pump connected to the gas extraction pipeline in the coal mine is used, and it is directly transported 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 extracted from underground, and the existing extraction pipelines in the underground tunnels of the coal mine can be used to directly transport the extracted gas to the gas gathering station, and there is no problem of occupying land.

[0008] Although the above technical solutions can facilitate gas extraction in goafs to a certain extent and prevent excessive gas concentration, there are still some problems. First, the goaf is the area where coal mining has been completed. There is no dedicated person to manage it in real time. When the gas concentration is abnormal, it is impossible to effectively extract and reduce the concentration in time to ensure safety; second, heavy objects such as stones and slag are easy to fall from high places such as the roof of the goaf, which can easily damage the extraction equipment; third, fallen objects are easy to fall and block the gas extraction pipeline, which reduces the 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 prior art, the present invention provides a continuous and convenient gas extraction protection device for goafs, which can comprehensively solve the problems of the inability to timely and effectively extract gas from goafs, heavy objects falling and damaging equipment, and heavy objects blocking the extraction pipeline outlets.

[0011] To achieve the above purpose, the present invention adopts the following technical means: The present invention provides a protective device for continuous and convenient gas extraction in goafs, 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 at 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 extraction pipeline, a stone pushing plate is provided at the front end of the anti-blocking module, a gas concentration sensor and a laser sensor are symmetrically embedded on both sides of the front end of the stone pushing plate, and a stone-strike 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 provided on the inner side of 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 a group of the second support frames and a group of the buffer telescopic frames, and two groups of the second support frames are connected by a second anti-dumping spring.

[0012] Furthermore, the third extraction pipeline is an inverted U-shaped pipeline, with a first rockfall pipe groove on the top, and the second rockfall pipe groove, the third rockfall pipe groove and the fourth rockfall pipe groove are provided at the bottom from left to right in sequence. The extraction pipeline is an L-shaped pipeline, and a fifth rockfall pipe groove is provided at the corner of the L-shaped pipeline.

[0013] 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 in sequence 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.

[0014] Furthermore, a base frame is provided at the rear of the anti-blocking module, the base frame is connected to three groups of supporting connecting frames, and the base frame is fixedly connected to the extraction pipeline through the supporting connecting frames, and a small hydraulic pump is provided at the front end of the base frame.

[0015] 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.

[0016] Furthermore, four groups of telescopic top frames are provided on the four sides of the front end of the support plate, 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.

[0017] 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-striking micro drill is installed at the front end of the driving shaft, and the stone-striking micro drill passes through the stone pushing plate. In the initial state, the stone-striking micro drill does not exceed the stone pushing plate.

[0018] 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.

[0019] 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 the bottom thereof. A support frame plate is provided at the bottom of the second support frame, a support column is provided at the bottom of the support frame plate, and 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.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. Automatic monitoring and gas extraction. The present invention arranges multiple sets of extraction pipelines at intervals according to the size of the goaf, sets gas concentration sensors in the extraction pipelines and transmits data to the equipment underground. When the gas concentration reaches a critical value, the external extraction auxiliary device is controlled to start and automatic extraction begins.

[0021] 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, and drops it to the outside through the rock drop pipe slot to prevent clogging the extraction pipeline.

[0022] 3. Prevent fallen objects from blocking the extraction pipeline. If fallen objects happen to fall on the front of the extraction pipeline, during the extraction operation, the laser sensor will sense the front situation in real time. When blocked, the anti-blocking module will be activated, and the stone pusher will directly push away the loose and light fallen objects. When the heavy objects are too heavy to be pushed away, the stone-smashing micro drill will be activated to crush the fallen objects and push them away, so as to prevent the fallen objects from blocking the extraction pipeline and affecting the extraction effect.

[0023] 4. Prevent falling objects from crashing the equipment. The present invention uses multiple groups of buffer spring frames and rubber buffer columns at the bottom of the protective cover to buffer its vertical force to prevent it from being crushed. At the same time, the anti-dumping spring between the second support frame and the buffer telescopic frame will link and fix the supporting and fixing devices to buffer its lateral force and prevent the equipment from tipping over. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 2 is a schematic diagram of the structure of a goaf gas continuous and convenient extraction protection device according to an embodiment of the present invention; Figure 2 1. It is a front view of a goaf gas continuous and convenient extraction protection device according to an embodiment of the present invention; Figure 3 It is a right view of the goaf gas continuous and convenient extraction protection device according to an embodiment of the present invention; Figure 4 It is a partial structural schematic diagram of a goaf gas continuous and convenient extraction protection device according to an embodiment of the present invention; Figure 5 is a schematic diagram of the structure of the extraction pipeline in an embodiment of the present invention; Figure 6 is a structural schematic diagram of an anti-blocking module in an embodiment of the present invention; Figure 7 is a front view of the anti-blocking module in an embodiment of the present invention; Figure 8 The present invention Figure 7 A partial enlarged view of the middle part; Fig. 9 is a schematic diagram of a protective structure in an embodiment of the present invention; Fig.10 is a front view of a protective structure in an embodiment of the present invention; Fig.11 is a cross-sectional view of an anti-blocking module in an embodiment of the present invention; Fig.12 is a schematic diagram of the internal structure of the fourth extraction pipeline in an embodiment of the present invention; Fig.13 It is a cross-sectional view of the fourth extraction pipeline in the embodiment of the present invention.

[0025] In the figure: 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 slot; 41. Second rockfall pipe slot; 42. Third rockfall pipe slot; 43. Fourth rockfall pipe slot; 44. First stone baffle semi-ring; 45. Second stone baffle semi-ring; 46. Third stone baffle semi-ring; 51. Fifth rockfall pipe slot; 52. Anti-blocking module; 61. Buffer side plate; 62. Buffer bottom plate; 63. Second buffer spring frame; 64. First buffer 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

[0026] The present invention is further described below in conjunction with the accompanying drawings: Example

[0027] As attached Figure 1 To Attachment Figure 4 As shown, in one embodiment of the present invention, a protective device for continuous and convenient gas extraction in a 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 extraction pipe 5 is an L-shaped pipeline.

[0028] As attached Figure 6 To Attachment Fig.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 on the inner side of the buffer telescopic frame 67, and the upper part of the second support frame 66 is provided with a rubber buffer column 65, 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.

[0029] As attached Figure 4 To Attachment Figure 5 As shown, the third extraction pipeline 3 is provided with a first rockfall pipe groove 31 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 from left to right at the bottom, and the L-shaped extraction pipeline 5 is provided with a fifth rockfall pipe groove 51 at its corner.

[0030] In this embodiment, the gas is extracted into the extraction pipeline, and the slag carried in the gas flow passes through three groups of first baffle plate semi-rings 44, second baffle plate semi-rings 45 and third baffle plate semi-rings 46, which are successively larger, and the slag is blocked by them and falls. Fig.12 To the attached Fig.13 , and is discharged through multiple sets of rockfall pipe troughs.

[0031] 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.

[0032] Furthermore, in order to achieve the effect of lateral buffering to prevent tipping, a linkage buffering 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

[0033] As attached Figure 3 To Attachment Figure 8 , Attachment Fig.12 and attached Fig.13 As shown, in one embodiment of the present invention, specifically, the first stone baffle semi-ring 44, the second stone baffle semi-ring 45 and the third stone baffle semi-ring 46 are provided in sequence from left to right inside the fourth extraction pipeline 4, 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; a base frame 521 is provided at the rear end of the anti-blocking module 52, 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.

[0034] As attached Figure 4 and attached Fig.10As shown, 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 groups of stabilizing frames 5241 are provided on the upper part of the hydraulic telescopic frame 524, 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 a top frame telescopic spring frame 5261 is provided inside the telescopic top frame 526, and the front end of the telescopic top frame 526 is fixedly installed A stone pushing plate 527 is provided, 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.

[0035] As attached Figure 1 To the attached Figure 3 , Attachment Fig. 9 and attached Fig.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 plate 61, a first buffer spring frame 64 is provided between the buffer side plate 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 the bottom of the second support frame 66, a support frame plate 8 is provided at the bottom of the support frame plate 8, and 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.

[0036] 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.

[0037] Furthermore, when the object at the front end is lighter, the stone 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 stone 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 increasing force and is compressed. At this time, the stone-strike micro drill 530 exceeds the stone pushing plate 527. At the same time, the stone-strike micro drill 530, driven by the driving motor 528, crushes the object into a loose structure, which is then pushed away under the action of the stone pushing plate 527.

[0038] Working principle: 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 devices.

[0039] 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.

[0040] During the extraction process, the laser sensor 5272 starts to emit laser. When an object blocks the front end of the extraction pipeline 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 support plate 525 and the stone pushing plate 527 at the front end to move forward synchronously. When the mass of the object at the front end is light, the stone pushing 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 stone pushing plate 527 cannot push the object. In this way, the top frame telescopic spring frame 5261 in the telescopic top frame 526 is continuously compressed by the force. At this time, the stone-strike micro drill 530 exceeds the stone pushing plate 527. 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 then pushed away under the action of the stone pushing plate 527.

[0041] The gas is extracted and enters the extraction pipeline. The slag carried in the gas flow passes through three groups of first baffle plate semi-rings 44, second baffle plate semi-rings 45 and third baffle plate semi-rings 46, which are successively larger. The slag is blocked by them and falls. Fig.12 To the attached Fig.13 , and is discharged through multiple sets of rockfall pipe troughs.

[0042] At the same time, the protective cover 6 covers the entire extraction device to prevent rocks from falling from the top from directly hitting the extraction device and causing damage. Specifically, during the protection process, first, the vertical buffer protection effect is achieved, including the first buffer protection of the buffer side plate 61 and the first buffer spring frame 64 at the bottom, and the second buffer 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 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 lateral force.

[0043] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is 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 can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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 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), 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 located inside the buffer telescopic frame (67). A rubber buffer column (65) is provided on the top of the second support frame (66), and a first anti-dumping spring (69) is provided between one group of the second support frames (66) and one group of the buffer telescopic frames (67), and two groups of the second support frames (66) are connected via a second anti-dumping spring (68).

2. A goaf gas continuous and convenient extraction protection device according to claim 1, characterized in that: The third extraction pipeline (3) is an inverted U-shaped pipeline, with a first rockfall pipe groove (31) provided at 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) at the bottom from left to right; 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 radii 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. A goaf gas continuous and convenient extraction protection device according to claim 1, 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 supporting connection frames (522), and the base frame (521) is fixedly connected to the extraction pipeline (5) via the supporting connection 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 groups of stabilizing frames (5241) are provided on the upper part of the hydraulic telescopic frame (524), 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).

6. A goaf gas continuous and convenient extraction protection device according to claim 5, characterized in that: Four groups of telescopic top frames (526) are provided on four sides of the front end of the support plate (525), a top frame telescopic spring frame (5261) is provided inside the telescopic top frame (526), ​​a stone push 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 push 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 extend beyond 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: The bottom of the protective cover (6) is provided with buffer side plates (61) around its periphery, the bottom of the buffer side plates (61) is provided with a buffer bottom plate (62), 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: 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 a second support frame (66) at the bottom thereof; 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 mounted 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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