Self-advancing integrated pipe dragging device for goaf of mine and use method thereof

Abstract

The present application relates to a kind of self-advancing mine goaf integrated drag pipe equipment and its use method, self-advancing mine goaf integrated drag pipe equipment includes: drag pipe pipeline and goaf gas extraction device;One end of drag pipe pipeline passes through the gap between adjacent hydraulic support and extends into goaf, the other end is installed on the base of hydraulic support, so that the hydraulic support can drive drag pipe pipeline to move forward, the inside of drag pipe pipeline is formed with suction passage along the axis direction, and goaf gas extraction device is communicated with suction passage by first pipeline.Due to the above structure, the drag pipe pipeline of the present application can move along with the hydraulic support, realize self-advancing, and the goaf gas extraction device can extract gas in goaf through the drag pipe pipeline, and can also sample and monitor the gas in goaf, which provides basis for goaf spontaneous combustion three-zone division, which significantly reduces the workload and operation cost of goaf gas extraction.

Description

Technical Field

[0001] This invention relates to the field of coal mine goaf gas extraction equipment, and in particular to a self-propelled integrated pipe-dragging device for mine goaf and its usage method. Background Technology

[0002] The division of the "three zones" for sealing air leaks in mines and spontaneous combustion in goaf areas remains a difficult problem to solve in the mining industry. According to a large number of studies, the main air leakage channels in goaf areas are the triangular zones formed by the natural collapse of the overlying rock on both sides of the goaf area (located on both sides of the goaf area).

[0003] Chinese patent document CN104696007B discloses a method for increasing the concentration and flow rate of gas extraction in the goaf during coal mining, comprising the following steps: First, excavating a high-efficiency extraction roadway along the mining direction of the working face. Second, during the mining process, laying gas injection pipelines in the intake airway, with the gas outlets located within the oxidation zone of the goaf and higher than the residual coal in the goaf. Third, installing grouting baffles behind the working face supports, and laying grouting pipes along the return airway and the working face, with filling pipes passing through the baffles along the working face. Finally, filling the void area behind the supports to form a sealed filling wall, preventing CO2 injected into the goaf from leaking to the working face, and injecting liquid CO2 into the oxidation zone of the goaf along the pipeline in the intake airway to replace CH4. The defects and shortcomings of this method for increasing the concentration and flow of gas in the goaf during coal mining are as follows: (1) This gas extraction method requires the excavation of a high extraction roadway along the mining direction of the working face and the laying of gas injection pipelines in the intake roadway. In actual use, the construction operation is relatively complicated and the cost is high; (2) The pre-embedded gas injection pipelines are easily damaged by the falling rocks from the roof, increasing the workload; (3) The gas injection pipelines and grouting pipelines are set up separately, which increases the operating cost.

[0004] Therefore, there is an urgent need to provide a self-propelled integrated pipe-dragging device for goaf areas in mines that is simple to operate and has low operating costs, as well as its usage method. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a self-propelled integrated pipe-dragging device for goaf areas in mines and its usage method, which solves the technical problems of complex operation and high cost of existing goaf gas extraction methods.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] In a first aspect, embodiments of the present invention provide a self-propelled integrated pipe-dragging device for goaf areas in mines, comprising: a pipe-dragging pipeline and a gas extraction device for goaf areas;

[0010] One end of the trailing pipe extends into the goaf area through the gap between adjacent hydraulic supports, and the other end is installed on the base of the hydraulic support, so that the hydraulic support can drive the trailing pipe to move forward. An axially formed air extraction channel is formed inside the trailing pipe, and the goaf gas extraction device is connected to the air extraction channel through a first pipeline.

[0011] Optionally, the self-propelled integrated pipe-dragging equipment for goaf areas in mines further includes: a motor and a motor mounting bracket;

[0012] The motor body is fixedly mounted on the base of the hydraulic support by the motor mounting bracket. The main shaft of the motor is connected to the end of the drag pipe near the base of the hydraulic support, so that the motor can drive the drag pipe to rotate. Multiple cutting teeth are provided on the outer side of the drag pipe.

[0013] Optionally, the number of self-advancing integrated pipe-dragging devices for goaf areas in a mine is two. One of the two self-advancing integrated pipe-dragging devices for goaf areas in a mine is arranged near the intake airway of the coal mining face, and the other self-advancing integrated pipe-dragging device for goaf areas in a mine is arranged near the return airway of the coal mining face.

[0014] Optionally, the self-propelled integrated pipe-dragging equipment for goaf areas in mines further includes: a bearing housing and a rolling bearing;

[0015] The bearing housing is fixedly installed on the base of the hydraulic support, the rolling bearing is installed inside the bearing housing, and the inner ring of the rolling bearing is fitted onto the trailing pipe.

[0016] Optionally, a driven gear ring is provided at one end of the pipe near the motor, and a driving gear is mounted on the main shaft of the motor, the driving gear meshing with the driven gear ring.

[0017] Optionally, the self-propelled integrated pipe-driving equipment for goaf areas in mines further includes: an air injection device and a grouting device;

[0018] The interior of the pipe also has a grouting channel and an air injection channel along the axial direction. The grouting channel, the air injection channel and the air extraction channel are isolated from each other. The air injection device is connected to the air injection channel through a second pipeline, and the grouting device is connected to the grouting channel through a third pipeline.

[0019] Optionally, the pipe is divided into an air extraction area, a grouting area, and an air injection area along the circumference. The air extraction area forms the air extraction channel, the grouting area forms the grouting channel, and the air injection area forms the air injection channel.

[0020] Optionally, the first pipeline is equipped with a first pipeline valve and a first flow meter, and the second pipeline is equipped with a second pipeline valve and a second flow meter.

[0021] Secondly, embodiments of the present invention provide a method for using the above-mentioned self-advancing integrated pipe-dragging equipment for goaf areas in mines, comprising the following steps:

[0022] S1. Arrange the trailing pipe between adjacent hydraulic supports, and install one end of the trailing pipe on the base of the hydraulic support;

[0023] S2. When the coal mining face moves forward, the trailing pipe moves forward with the hydraulic support, achieving self-advancing;

[0024] S3. After the dragging pipeline has been moved, the goaf gas extraction device is connected to the gas extraction channel in the dragging pipeline through the first pipeline, the grouting device is connected to the grouting channel in the dragging pipeline through the third pipeline, and the gas injection device is connected to the gas injection channel in the dragging pipeline through the second pipeline.

[0025] S4. Activate the goaf gas extraction device to extract gas from the goaf; and / or activate the grouting device to inject grout into the goaf to seal the air leak; and / or activate the gas injection device to inject gas into the goaf to inert the gas in the goaf.

[0026] S5. Remove the gas extraction device, the grouting device and the gas injection device from the goaf, and repeat steps S2-S4 until coal mining operations are stopped.

[0027] Optionally, step S2 further includes: turning on the motor, the motor driving the drag pipe to rotate, and the cutting teeth on the drag pipe cutting the fallen overburden.

[0028] (III) Beneficial Effects

[0029] The beneficial effects of this invention are as follows: The self-propelled integrated goaf extraction device of this invention includes a pipe and a goaf gas extraction device. One end of the pipe extends into the goaf through the gap between adjacent hydraulic supports, and the other end is installed on the base of the hydraulic support, enabling the hydraulic support to drive the pipe forward. An axial extraction channel is formed inside the pipe, and the goaf gas extraction device is connected to the extraction channel through a first pipeline. Compared with the existing method of excavating high-pressure extraction roadways, the pipe of this invention can move with the hydraulic support, achieving self-propelled advancement and avoiding the excavation of high-pressure extraction roadways. At the same time, the goaf gas extraction device can extract gas from the goaf through the pipe and also sample and monitor the gas in the goaf, providing data for the division of the three spontaneous combustion zones in the goaf. This significantly reduces the workload and operating cost of goaf gas extraction.

[0030] The self-propelled integrated pipe-dragging device for goaf areas in this invention also includes a motor and a motor mounting frame. The motor body is fixedly mounted on the base of the hydraulic support via the motor mounting frame. The main shaft of the motor is connected to the end of the pipe-dragging pipe near the base of the hydraulic support, enabling the motor to drive the pipe-dragging pipe to rotate. Multiple cutting teeth are provided on the outer surface of the pipe-dragging pipe. When the pipe-dragging pipe moves forward with the hydraulic support, the motor can drive the pipe-dragging pipe to rotate. The cutting teeth on the pipe-dragging pipe can cut the rocks falling from the coal seam roof, which significantly reduces the resistance encountered by the pipe-dragging pipe during movement and prevents it from being crushed by falling rocks.

[0031] The self-propelled integrated pipe-dragging equipment for goaf areas in this invention divides the pipe-dragging pipeline into an air extraction area, a grouting area, and an air injection area along the circumference. An air extraction channel is formed in the air extraction area, a grouting channel is formed in the grouting area, and an air injection channel is formed in the air injection area, which are used for air extraction, grouting, and air injection, respectively. This achieves multi-functional integration and further reduces costs and operating procedures. Attached Figure Description

[0032] Figure 1 This is a top view of the self-advancing integrated pipe-dragging device for goaf areas in mines according to the present invention, placed at the coal mining face.

[0033] Figure 2 This is a side view schematic diagram of the self-advancing integrated pipe-dragging device and hydraulic support for goaf areas in mines according to the present invention.

[0034] Figure 3 This is a schematic diagram of the pipe-dragging pipeline of the self-propelled integrated pipe-dragging device for goaf areas in mines according to the present invention.

[0035] [Explanation of Labels in the Attached Image]

[0036] 1: Hydraulic support; 2: Pipeline; 3: Cutting teeth; 4: Motor; 5: Air extraction channel; 6: Grouting channel; 7: Gas injection channel; 8: Gas injection device; 9: Grouting device; 10: Goaf gas extraction device; 11: First pipeline; 12: Second pipeline; 13: Third pipeline. Detailed Implementation

[0037] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This diagram shows a top view of the self-propelled integrated pipe-dragging device for goaf areas in this embodiment, placed at the coal face. Figure 2 This diagram shows a side view of the self-propelled integrated pipe-dragging device and hydraulic support in the goaf of this embodiment. Figure 3 A schematic diagram of the pipe-dragging pipeline structure of the self-propelled mine goaf integrated pipe-dragging equipment of this embodiment is shown.

[0039] The self-propelled integrated goaf extraction device of this embodiment includes: a pipe 2 and a goaf gas extraction device 10. The pipe 2 has an axially formed extraction channel 5 inside, with one end extending into the goaf through the gap between hydraulic supports 1, and the other end mounted on the base of the hydraulic supports 1, allowing the hydraulic supports 1 to drive the pipe 2 forward. The goaf gas extraction device 10 is connected to the extraction channel 5 inside the pipe 2 via a first pipeline 11. In use, the goaf gas extraction device 10 can both extract gas from the goaf and sample the gas within the goaf to monitor the types and content of gases inside the goaf, thus providing a practical basis for the division of the three zones of spontaneous combustion in the goaf and the identification of spontaneous combustion hazards.

[0040] The self-propelled integrated pipe-dragging equipment for goaf areas in this embodiment also includes a motor 4 and a motor mounting bracket. The motor 4 is fixedly mounted on the base of the hydraulic support 1 via the motor mounting bracket. The main shaft of the motor 4 is connected to the end of the pipe-dragging pipe 2 near the base of the hydraulic support 1 to drive the pipe-dragging pipe 2 to rotate. Multiple cutting teeth 3 are provided on the outer surface of the pipe-dragging pipe 2. When the hydraulic support 1 drives the pipe-dragging pipe 2 forward, the motor 4 drives the pipe-dragging pipe 2 to rotate, and the cutting teeth 3 on the pipe-dragging pipe 2 cut the overburden rock falling from the coal seam roof, thereby reducing the resistance encountered by the pipe-dragging pipe 2 during movement.

[0041] Preferably, multiple cutting teeth 3 are evenly arranged in a spiral pattern on the outer surface of the pipe 2. The purpose of this arrangement of cutting teeth 3 is to reduce the number of cutting teeth 3, thereby reducing the cost and weight of the pipe 2, while also enabling the pipe 2 to cut the collapsed overburden rock from 360 degrees.

[0042] The self-propelled integrated goaf-laying pipe system of this embodiment also includes an air injection device 8 and a grouting device 9. The interior of the pipe 2 also forms an axially oriented grouting channel 6 and an air injection channel 7. The grouting channel 6, air injection channel 7, and extraction channel 5 are isolated from each other. The air injection device 8 is connected to the air injection channel 7 via a second pipe 12, and the grouting device 9 is connected to the grouting channel 6 via a third pipe 13. The function of the air injection device 8 is to inject inert gas or carbon dioxide gas into the goaf to inertize the gas within the goaf, thereby reducing the risk of spontaneous combustion. Nitrogen gas is preferred as the inert gas. The function of the grouting device 9 is to inject premixed organic or inorganic filler material into the goaf, filling the gaps between the fallen rocks in the goaf to achieve the purpose of sealing air leaks.

[0043] Furthermore, a first pipeline valve and a first flow meter are installed on the first pipeline 11, and a second pipeline valve and a second flow meter are installed on the second pipeline 12. The first pipeline valve is used to control the opening and closing of the first pipeline 11, and the first flow meter is used to detect the flow rate of the gas in the first pipeline 11; the second pipeline valve is used to control the opening and closing of the second pipeline 12, and the second flow meter is used to detect the flow rate of the gas in the second pipeline 12.

[0044] In this embodiment, the pipe 2 is divided into an air extraction zone, a grouting zone, and an air injection zone at 120° intervals along its circumference. An air extraction channel 5 is formed in the air extraction zone, a grouting channel 6 is formed in the grouting zone, and an air injection channel 7 is formed in the air injection zone. In addition, the air extraction zone, the grouting zone, and the air injection zone are marked with mutually distinguishing marks to prevent confusion between the air extraction channel 5, the grouting channel 6, and the air injection channel 7, which could lead to a decrease in performance.

[0045] Furthermore, the air injection device 8 and the grouting device 9 are trailer-mounted or installed in the roadway as air injection pipes and grouting pipes, which provides multiple options and gives them more practical value.

[0046] Furthermore, in this embodiment, there are two self-propelled mine goaf integrated pipe-laying devices. One of the devices is located near the intake airway at the coal face, and the other is located near the return airway at the coal face. Since the triangular zone formed by the natural collapse of the overlying rock on both sides of the goaf (corresponding to the intake and return airways) is the main air leakage channel in the goaf, placing the self-propelled mine goaf integrated pipe-laying devices at the aforementioned locations can better block air leakage.

[0047] In this embodiment, the self-propelled integrated pipe-dragging equipment for goaf areas in mines further includes: a bearing housing and a rolling bearing. The bearing housing is fixedly installed on the base of the hydraulic support 1, the rolling bearing is installed inside the bearing housing, and the inner ring of the rolling bearing is fitted onto the pipe-dragging pipe 2.

[0048] Furthermore, a driven gear ring is provided at one end of the pipe 2 near the motor 4, and a driving gear is mounted on the main shaft of the motor 4. The driving gear and the driven gear ring mesh. The purpose of providing the driven gear ring and the driving gear is to form a drive connection between the motor 4 and the pipe 2, so as to transmit the rotational power to the pipe 2.

[0049] In this embodiment, the ends of the first pipe 11, the second pipe 12, and the third pipe 13 are all equipped with connectors, which are threadedly connected to the air extraction channel 5, the grouting channel 6, and the air injection channel 7. Specifically, the outer surface of the connector is provided with external threads, and the inner wall surfaces of the air extraction channel 5, the grouting channel 6, and the air injection channel 7 are provided with internal threads. The two are screwed together to achieve connection.

[0050] This embodiment also provides a method for using the above-mentioned self-advancing integrated pipe-dragging equipment for goaf areas in mines, including the following steps:

[0051] S1. Arrange the pipe 2 between adjacent hydraulic supports 1, and install one end of the pipe 2 on the base of the hydraulic support 1. Specifically, firstly, the pipe 2 can be driven by a drilling rig to pass through the gap between adjacent hydraulic supports 1 and drill into the goaf; secondly, install bearing seats and rolling bearings on the base of the hydraulic support 1, and the end of the pipe 2 near the hydraulic support 1 passes through the rolling bearing and is fixedly connected to the inner ring of the rolling bearing; finally, fix the body of the motor 4 on the base of the hydraulic support 1, and the driving gear on the main shaft of the motor 4 meshes with the driven gear ring on the pipe 2 to form a driving connection.

[0052] S2. When the coal mining face moves forward, the drag pipe 2 moves forward with the hydraulic support 1 to achieve self-advancement; at the same time, the motor 4 is turned on, and the motor 4 drives the drag pipe 2 to rotate, cutting the fallen overburden, reducing the resistance encountered by the drag pipe 2 in its movement, and preventing it from being crushed by the fallen overburden.

[0053] S3. After the dragging pipe 2 has been moved, the motor 4 is turned off. The goaf gas extraction device 10 is connected to the extraction channel 5 inside the dragging pipe 2 through the first pipe 11. The grouting device 9 is connected to the grouting channel 6 inside the dragging pipe 2 through the third pipe 13. The gas injection device 8 is connected to the gas injection channel 7 inside the dragging pipe 2 through the second pipe 12. Specifically, before the goaf gas extraction device 10 extracts gas, the first pipe valve on the first pipe 11 is opened; before the gas injection device 8 injects gas into the goaf, the second pipe valve on the second pipe 12 is opened.

[0054] S4. Activate the goaf gas extraction device 10 to extract gas from the goaf to identify the three zones of spontaneous combustion; and / or, activate the grouting device 9 to inject grout into the goaf to seal any leaks; and / or, activate the gas injection device 8 to inject gas into the goaf to inerte the gas and reduce the risk of spontaneous combustion. It should be noted that the gas extraction operation of the goaf gas extraction device 10, the grouting operation of the grouting device 9, and the gas injection operation of the gas injection device 8 are not performed simultaneously. Operators can choose to activate the goaf gas extraction device 10, the grouting device 9, or the gas injection device 8 according to the needs of the coal face to complete the tasks of goaf gas extraction monitoring, leak sealing, and goaf gas inerting.

[0055] S5. Close the first pipeline valve and the second pipeline valve, remove the gas extraction device 10, grouting device 9 and gas injection device 8 in the goaf area, and repeat the above steps S2-S4 until coal mining operations are stopped.

[0056] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A self-propelled integrated pipe-dragging device for goaf areas in mines, characterized in that: The self-propelled mine goaf integrated pipe-dragging equipment includes: a pipe-dragging pipeline (2), a goaf gas extraction device (10), a motor (4), a motor mounting frame, a bearing seat, and a rolling bearing; One end of the drag pipe (2) extends into the goaf area through the gap between adjacent hydraulic supports (1), and the other end is installed on the base of the hydraulic support (1), so that the hydraulic support (1) can drive the drag pipe (2) to move forward. An air extraction channel (5) is formed axially inside the drag pipe (2), and the goaf gas extraction device (10) is connected to the air extraction channel (5) through the first pipeline (11). The bearing housing is fixedly installed on the base of the hydraulic support (1), the rolling bearing is installed inside the bearing housing, and the inner ring of the rolling bearing is sleeved on the drag pipe (2). The motor (4) body is fixedly mounted on the base of the hydraulic support (1) by the motor mounting bracket. The main shaft of the motor (4) is connected to the end of the drag pipe (2) near the base of the hydraulic support (1) to drive the drag pipe (2) to rotate. A driven gear ring is provided at the end of the drag pipe (2) near the motor (4). A drive gear is mounted on the main shaft of the motor (4). The drive gear and the driven gear ring mesh. Multiple cutting teeth (3) are provided on the outer surface of the drag pipe (2). The multiple cutting teeth (3) are arranged in a spiral shape and are used to cut the collapsed overburden rock 360 degrees as the drag pipe (2) rotates.

2. The self-propelled integrated pipe-laying equipment for goaf areas in mines as described in claim 1, characterized in that: The number of self-advancing integrated pipe-dragging devices for goaf areas is two. One of the two self-advancing integrated pipe-dragging devices for goaf areas is arranged near the intake airway of the coal mining face, and the other self-advancing integrated pipe-dragging device for goaf areas is arranged near the return airway of the coal mining face.

3. The self-propelled integrated pipe-laying equipment for goaf areas in mines as described in claim 1, characterized in that: The self-propelled mine goaf integrated pipe-laying equipment also includes: an air injection device (8) and a grouting device (9). The interior of the pipe (2) also has a grouting channel (6) and an air injection channel (7) formed along the axial direction. The grouting channel (6), the air injection channel (7) and the air extraction channel (5) are isolated from each other. The air injection device (8) is connected to the air injection channel (7) through the second pipeline (12). The grouting device (9) is connected to the grouting channel (6) through the third pipeline (13).

4. The self-propelled integrated pipe-laying equipment for goaf areas in mines as described in claim 3, characterized in that: The pipe (2) is divided into an air extraction area, a grouting area and an air injection area along the circumference. The air extraction area forms the air extraction channel (5), the grouting area forms the grouting channel (6), and the air injection area forms the air injection channel (7).

5. The self-propelled integrated pipe-laying equipment for goaf areas in mines as described in claim 3, characterized in that: The first pipeline (11) is equipped with a first pipeline valve and a first flow meter, and the second pipeline (12) is equipped with a second pipeline valve and a second flow meter.

6. A method of using the self-propelled integrated pipe-dragging equipment for goaf areas in mines according to any one of claims 3-5, characterized in that: Includes the following steps: S1. Arrange the drag pipe (2) between adjacent hydraulic supports (1) and install one end of the drag pipe (2) on the base of the hydraulic support (1); S2. When the coal mining face moves forward, the trailing pipe (2) moves forward with the hydraulic support (1) to achieve self-advancement; S3. After the drag pipe (2) has been moved, the gas extraction device (10) in the goaf area is connected to the gas extraction channel (5) in the drag pipe (2) through the first pipeline (11), the grouting device (9) is connected to the grouting channel (6) in the drag pipe (2) through the third pipeline (13), and the gas injection device (8) is connected to the gas injection channel (7) in the drag pipe (2) through the second pipeline (12). S4. Turn on the gas extraction device (10) in the goaf area, and the gas extraction device (10) extracts the gas in the goaf area; and / or, turn on the grouting device (9), and the grouting device (9) injects grout into the goaf area to seal the air leak; and / or, turn on the gas injection device (8), and the gas injection device (8) injects gas into the goaf area to inertize the gas in the goaf area. S5. Remove the gas extraction device (10), the grouting device (9), and the gas injection device (8) in the goaf area, and repeat steps S2-S4 until coal mining operations are stopped.

7. The method of using the self-propelled integrated pipe-laying equipment for goaf areas in mines as described in claim 6, characterized in that: Step S2 further includes: turning on the motor (4), the motor (4) driving the drag pipe (2) to rotate, and the cutting teeth (3) on the drag pipe (2) cutting the fallen overburden.

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