Goaf monitoring system

Abstract

The goaf monitoring system comprises a detection pipeline, the detection pipeline comprises a protection net sleeve, a first beam tube, a second beam tube and a third beam tube, the protection net sleeve is arranged on the side wall of an air return roadway, a protection channel is formed in the protection net sleeve, and the first beam tube, the second beam tube and the third beam tube are arranged in the protection channel respectively; the first end of the first beam tube is located in a suffocation zone of the goaf, the first end of the second beam tube is located in an oxidation heating zone of the goaf, and the first end of the third beam tube is located in a heat dissipation zone of the goaf. According to the goaf monitoring system disclosed by the invention, stable protection can be realized by utilizing the protective net sleeve, so that the first beam tube, the second beam tube and the third beam tube are prevented from being damaged or even damaged due to collapse of the goaf, meanwhile, the gas monitoring cost of the goaf is effectively reduced, and the gas monitoring efficiency of the goaf is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of goaf monitoring, and in particular to a goaf monitoring system. Background Art

[0002] In mine mining, it is necessary to use bundle pipes for air transmission to achieve gas monitoring in goafs. However, when arranging the bundle pipes, iron pipes are needed to protect them to prevent them from being damaged by collapse in the goaf. However, the arrangement of iron pipes is difficult and requires a lot of manpower and material resources, resulting in high costs and low efficiency for gas monitoring in goafs. Summary of the Invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, the purpose of the present disclosure is to provide a goaf monitoring system.

[0005] To achieve the above-mentioned purpose, the present disclosure provides a goaf monitoring system, comprising: a detection pipeline, the detection pipeline comprising: a protective mesh, a first bundle of tubes, a second bundle of tubes and a third bundle of tubes, the protective mesh being arranged on the side of the return air tunnel, and a protective channel being arranged in the protective mesh, the first bundle of tubes, the second bundle of tubes and the third bundle of tubes being respectively arranged in the protective channels, the first end of the first bundle of tubes being located in the asphyxiation zone of the goaf, the first end of the second bundle of tubes being located in the oxidation and warming zone of the goaf, and the first end of the third bundle of tubes being located in the heat dissipation zone of the goaf; a monitoring device, the detection end of the monitoring device being respectively connected to the second end of the first bundle of tubes, the second end of the second bundle of tubes and the second end of the third bundle of tubes.

[0006] Optionally, the detection pipeline further includes: a plurality of temperature measuring optical fibers, which are arranged in the wall of the protective mesh sleeve, and the plurality of temperature measuring optical fibers are distributed at intervals along the circumference of the protective mesh sleeve, and the temperature measuring optical fibers are connected to the detection end of the monitoring device.

[0007] Optionally, the multiple temperature measuring optical fibers include: a first optical fiber and a second optical fiber, the first optical fiber and the second optical fiber are arranged at intervals in the wall of the protective mesh, and the first optical fiber and the second optical fiber are located on the side of the protective mesh close to the side of the return air duct, and the first optical fiber and the second optical fiber are used to detect the coal wall temperature.

[0008] Optionally, the multiple temperature measuring optical fibers include: a third optical fiber and a fourth optical fiber, the third optical fiber and the fourth optical fiber are arranged at intervals in the wall of the protective mesh, and the third optical fiber and the fourth optical fiber are located on the side of the protective mesh close to the goaf, and the third optical fiber and the fourth optical fiber are used to detect the temperature of the goaf.

[0009] Optionally, the protective net sleeve is made of heat-conducting material.

[0010] Optionally, the monitoring device includes: an optical fiber temperature measurement host, which is arranged close to the stop-mining line of the goaf, and the detection end of the optical fiber temperature measurement host is connected to the temperature measurement optical fiber.

[0011] Optionally, the monitoring device includes: a bundle tube monitoring host, which is arranged near the stop-mining line of the goaf, and the detection end of the bundle tube monitoring host is respectively connected to the second end of the first bundle tube, the second end of the second bundle tube and the second end of the third bundle tube.

[0012] Optionally, the pore diameter of the mesh of the protective net sleeve is 0.1 mm.

[0013] Optionally, the distance between the protective net and the bottom plate of the return air duct is 1m.

[0014] Optionally, the first bundle of tubes, the second bundle of tubes, and the third bundle of tubes have different shapes and / or markings.

[0015] The technical solution provided by the present disclosure may have the following beneficial effects:

[0016] Since the protective net is arranged on the side of the return air tunnel and a protective channel is arranged in the protective net, the first bundle of pipes, the second bundle of pipes and the third bundle of pipes are respectively arranged in the protective channels, so that the first bundle of pipes, the second bundle of pipes and the third bundle of pipes can be stably arranged on the side of the return air tunnel by using the protective net, and can also be stably protected by the protective net, thereby avoiding damage or even destruction of the first bundle of pipes, the second bundle of pipes and the third bundle of pipes due to the collapse of the goaf. At the same time, the first bundle of pipes, the second bundle of pipes, the third bundle of pipes and the protective net are integrated and arranged, which is easy to install and arrange, thereby effectively saving a lot of manpower and material resources, and thus effectively reducing the gas monitoring cost of the goaf and improving the gas monitoring efficiency of the goaf.

[0017] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a schematic axial cross-sectional view of a goaf monitoring system proposed in one embodiment of the present disclosure;

[0020] Figure 21 is a schematic radial cross-sectional view of a goaf monitoring system according to an embodiment of the present disclosure;

[0021] As shown in the figure: 1. Detection pipeline, 11. Protective net, 12. First bundle of pipes, 13. Second bundle of pipes, 14. Third bundle of pipes,

[0022] 15. Temperature measuring optical fiber, 151. First optical fiber, 152. Second optical fiber, 153. Third optical fiber, 154. Fourth optical fiber. DETAILED DESCRIPTION

[0023] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure. On the contrary, the embodiments of the present disclosure include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0024] like Figure 1 and Figure 2 As shown, the embodiment of the present disclosure proposes a goaf monitoring system, including: a detection pipeline 1 and a monitoring device (not shown in the figure), the detection pipeline 1 includes: a protective mesh 11, a first bundle of tubes 12, a second bundle of tubes 13 and a third bundle of tubes 14, the protective mesh 11 is arranged on the side of the return air tunnel, and a protective channel is arranged in the protective mesh 11, the first bundle of tubes 12, the second bundle of tubes 13 and the third bundle of tubes 14 are respectively arranged in the protective channels, the first end of the first bundle of tubes 12 is located in the asphyxiation zone of the goaf, the first end of the second bundle of tubes 13 is located in the oxidation and heating zone of the goaf, and the first end of the third bundle of tubes 14 is located in the heat dissipation zone of the goaf, and the detection end of the monitoring device is connected to the second end of the first bundle of tubes 12, the second end of the second bundle of tubes 13 and the second end of the third bundle of tubes 14 respectively.

[0025] It can be understood that since the first end of the first bundle of tubes 12 is located in the asphyxiation zone of the goaf, and the second end of the first bundle of tubes 12 is connected to the detection end of the monitoring device, the first bundle of tubes 12 can transmit the air in the asphyxiation zone of the goaf to the detection end of the monitoring device, thereby realizing gas monitoring of the asphyxiation zone of the goaf using the monitoring device; since the first end of the second bundle of tubes 13 is located in the oxidation and warming zone of the goaf, and the second end of the second bundle of tubes 13 is connected to the detection end of the monitoring device, the second bundle of tubes 13 can transmit the air in the oxidation and warming zone of the goaf to the detection end of the monitoring device, thereby realizing gas monitoring of the oxidation and warming zone of the goaf using the monitoring device; since the first end of the third bundle of tubes 14 is located in the heat dissipation zone of the goaf, and the second end of the third bundle of tubes 14 is connected to the detection end of the monitoring device, the third bundle of tubes 14 can transmit the air in the heat dissipation zone of the goaf to the detection end of the monitoring device, thereby realizing gas monitoring of the heat dissipation zone of the goaf using the monitoring device. Therefore, through the cooperation of the first bundle of tubes 12, the second bundle of tubes 13, the third bundle of tubes 14 and the monitoring device, gas monitoring can be achieved in the asphyxiation zone, oxidation heating zone and heat dissipation zone of the goaf, thereby reducing the risk of spontaneous combustion in the goaf and improving the safety of underground operations.

[0026] Among them, since the protective net 11 is arranged on the side of the return air tunnel and a protective channel is provided in the protective net 11, the first bundle of pipes 12, the second bundle of pipes 13 and the third bundle of pipes 14 are respectively arranged in the protective channels, so that the first bundle of pipes 12, the second bundle of pipes 13 and the third bundle of pipes 14 can be stably arranged on the side of the return air tunnel using the protective net 11, and can also be stably protected by the protective net 11, thereby avoiding damage or even destruction of the first bundle of pipes 12, the second bundle of pipes 13 and the third bundle of pipes 14 due to the collapse of the goaf. At the same time, the first bundle of pipes 12, the second bundle of pipes 13, the third bundle of pipes 14 and the protective net 11 are integrated and easy to install and arrange, thereby effectively saving a lot of manpower and material resources, and thus effectively reducing the gas monitoring cost of the goaf and improving the gas monitoring efficiency of the goaf.

[0027] It should be noted that the goaf is an underground space gradually formed during underground operations. The goaf includes: asphyxiation zone, oxidation warming zone and heat dissipation zone. These three areas are of great significance in the prevention and control of spontaneous combustion in the goaf.

[0028] Specifically, the asphyxiation zone refers to an area in the goaf where the oxygen content is extremely low and insufficient to support the continued spontaneous combustion of coal. In this area, due to the extremely low oxygen concentration, the oxidation reaction of the coal basically stops, the temperature gradually decreases, and the remaining coal gradually cools down.

[0029] The oxidation and warming zone refers to the area in the goaf that has sufficient oxygen supply conditions and good heat storage conditions. The heat generated by coal spontaneous combustion can maintain the continued oxidation and heating of the coal. This is the key area for preventing coal spontaneous combustion in the goaf.

[0030] The heat dissipation zone refers to the goaf area close to the working face, with high air leakage speed, high oxygen concentration but no obvious temperature rise. In this area, although there is sufficient oxygen, due to the high air leakage speed, most of the heat generated by coal spontaneous combustion is carried away by the airflow, so spontaneous combustion is not easy to occur.

[0031] Among them, the asphyxiation zone is usually located deep in the goaf, far away from the working face, the heat dissipation zone is close to the working face, and the oxidation warming zone is located between the asphyxiation zone and the heat dissipation zone.

[0032] The first bundle of tubes 12 is used to cooperate with the monitoring device to monitor the gas in the asphyxiation belt. The specific type of the first bundle of tubes 12 can be set according to actual needs and is not limited to this.

[0033] The second bundle of tubes 13 is used to cooperate with the monitoring device to monitor the gas in the oxidation and heating zone. The specific type of the second bundle of tubes 13 can be set according to actual needs and is not limited to this.

[0034] The third bundle of tubes 14 is used to cooperate with the monitoring device to monitor the gas in the heat dissipation belt. The specific type of the third bundle of tubes 14 can be set according to actual needs and is not limited to this.

[0035] Among them, the first end of the first bundle of tubes 12, the first end of the second bundle of tubes 13, and the first end of the third bundle of tubes 14 are respectively located at the return air tunnel entrance of the working face in the initial stage of operation. Moreover, as the working face advances, the first end of the first bundle of tubes 12, the first end of the second bundle of tubes 13, and the first end of the third bundle of tubes 14 are respectively located in the asphyxiation zone, oxidation warming zone, and heat dissipation zone of the goaf. As the working face continues to advance, the first bundle of tubes 12, the second bundle of tubes 13, and the third bundle of tubes 14 are alternately cut in sequence so that the first end of the first bundle of tubes 12, the first end of the second bundle of tubes 13, and the first end of the third bundle of tubes 14 are always located in the asphyxiation zone, oxidation warming zone, and heat dissipation zone of the goaf, thereby realizing gas monitoring of the three zones in the goaf.

[0036] The protective channel in the protective mesh sleeve 11 is used to accommodate and protect the first bundle of tubes 12, the second bundle of tubes 13 and the third bundle of tubes 14. The specific type of the protective mesh sleeve 11 can be set according to actual needs and is not limited to this. For example, the protective mesh sleeve 11 is provided with multiple mesh holes, and the mesh holes penetrate the sleeve wall of the protective mesh sleeve 11 along the radial direction of the protective mesh sleeve 11 and are connected to the protective channel. The protective mesh sleeve 11 can be made of metal or other materials with greater structural strength. At the same time, based on the multiple mesh structure of the protective mesh sleeve 11, the protective mesh sleeve 11 has a certain flexibility and can be arranged along a straight line direction, a curved direction, etc.

[0037] The monitoring device is used for gas detection, analysis and processing, etc. The specific type of the monitoring device can be set according to actual needs and is not limited to this.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments, the detection pipeline 1 also includes: a plurality of temperature measuring optical fibers 15, which are arranged in the wall of the protective mesh sleeve 11, and the plurality of temperature measuring optical fibers 15 are distributed at intervals along the circumference of the protective mesh sleeve 11, and the temperature measuring optical fibers 15 are connected to the detection end of the monitoring device.

[0039] It can be understood that since the temperature measuring optical fiber 15 is arranged in the wall of the protective net sleeve 11, and the temperature measuring optical fiber 15 is connected to the detection end of the monitoring device, the monitoring device can use multiple temperature measuring optical fibers 15 to detect the temperature at the position where the protective net sleeve 11 passes, thereby easily realizing the monitoring of the goaf temperature, coal wall temperature, etc. At the same time, the temperature measuring optical fiber 15 can also use the protective net sleeve 11 to achieve stable protection, thereby avoiding damage or even destruction of the temperature measuring optical fiber 15 due to the collapse of the goaf, thereby ensuring accurate monitoring of the underground temperature.

[0040] It should be noted that the temperature-sensing optical fiber 15 infers temperature changes by measuring the intensity or phase of the light transmitted through it. When the optical fiber is affected by temperature, its refractive index and reflectivity change, which in turn affects the transmission of the optical signal. Specifically, light in the optical fiber changes with temperature, causing the optical index of the fiber to change. This change in refractive index causes a change in the optical path length difference of the light, which in turn reflects the temperature change through changes in phase difference or light intensity. The specific type of temperature-sensing optical fiber 15 can be set according to actual needs and is not limited to this.

[0041] like Figure 2 As shown, in some embodiments, multiple temperature measuring optical fibers 15 include: a first optical fiber 151 and a second optical fiber 152, the first optical fiber 151 and the second optical fiber 152 are spaced apart in the wall of the protective mesh 11, and the first optical fiber 151 and the second optical fiber 152 are located on the side of the protective mesh 11 close to the side of the return air channel, and the first optical fiber 151 and the second optical fiber 152 are used to detect the coal wall temperature.

[0042] It can be understood that since the first optical fiber 151 and the second optical fiber 152 are arranged at intervals in the wall of the protective mesh 11, and the first optical fiber 151 and the second optical fiber 152 are located on the side of the protective mesh 11 close to the side of the return air channel, the monitoring device can use the first optical fiber 151 and the second optical fiber 152 to detect the temperature of the side of the return air channel, thereby facilitating the monitoring of the coal wall temperature. At the same time, the first optical fiber 151 and the second optical fiber 152 can also use the protective mesh 11 to achieve stable protection, thereby avoiding damage or even destruction of the first optical fiber 151 and the second optical fiber 152 due to the collapse of the goaf, thereby ensuring accurate monitoring of the coal wall temperature.

[0043] It should be noted that the first optical fiber 151 and the second optical fiber 152 are both temperature measurement optical fibers 15 .

[0044] like Figure 2 As shown, in some embodiments, the multiple temperature measuring optical fibers 15 include: a third optical fiber 153 and a fourth optical fiber 154, the third optical fiber 153 and the fourth optical fiber 154 are spaced apart in the wall of the protective net sleeve 11, and the third optical fiber 153 and the fourth optical fiber 154 are located on the side of the protective net sleeve 11 close to the goaf, and the third optical fiber 153 and the fourth optical fiber 154 are used to detect the temperature of the goaf.

[0045] It can be understood that since the third optical fiber 153 and the fourth optical fiber 154 are arranged at intervals in the wall of the protective net 11, and the third optical fiber 153 and the fourth optical fiber 154 are located on the side of the protective net 11 close to the goaf, the monitoring device can use the third optical fiber 153 and the fourth optical fiber 154 to detect the temperature of the goaf, thereby facilitating the monitoring of the goaf temperature. At the same time, the third optical fiber 153 and the fourth optical fiber 154 can also use the protective net 11 to achieve stable protection, thereby avoiding damage or even destruction of the third optical fiber 153 and the fourth optical fiber 154 due to the collapse of the goaf, thereby ensuring accurate monitoring of the goaf temperature.

[0046] It should be noted that the third optical fiber 153 and the fourth optical fiber 154 are both temperature measurement optical fibers 15 .

[0047] For example, the first optical fiber 151 , the second optical fiber 152 , the third optical fiber 153 and the fourth optical fiber 154 are evenly distributed along the circumference of the protective net 11 .

[0048] In some embodiments, the protective mesh sleeve 11 is made of a heat-conductive material.

[0049] It can be understood that since the protective mesh 11 is made of heat-conducting material, the protective mesh 11 can protect the first bundle of tubes 12, the second bundle of tubes 13, the third bundle of tubes 14 and the temperature measuring optical fiber 15 while also achieving efficient heat transfer, thereby reducing the impact on the temperature detection of the temperature measuring optical fiber 15, and thus ensuring accurate monitoring of the downhole temperature.

[0050] It should be noted that the specific type of the thermal conductive material can be set according to actual needs and is not limited to this. For example, the thermal conductive material can be copper, aluminum, or other materials.

[0051] In some embodiments, the monitoring device includes: an optical fiber temperature measurement host, which is set close to the stop-mining line in the goaf, and the detection end of the optical fiber temperature measurement host is connected to the temperature measurement optical fiber 15.

[0052] It can be understood that since the detection end of the optical fiber temperature measuring host is connected to the temperature measuring optical fiber 15, the optical fiber temperature measuring host can use multiple temperature measuring optical fibers 15 to detect the temperature at the position where the protective net sleeve 11 passes, thereby facilitating the monitoring of the goaf temperature, coal wall temperature, etc. At the same time, since the optical fiber temperature measuring host is set close to the stop-mining line of the goaf, the optical fiber temperature measuring host is not easily affected by the advancement of the working face, thereby ensuring stable monitoring of the underground temperature.

[0053] It should be noted that the optical fiber temperature measurement host is used to cooperate with the temperature measurement optical fiber 15 to achieve temperature monitoring. The specific type of the optical fiber temperature measurement host can be set according to actual needs and is not limited to this.

[0054] In some embodiments, the monitoring device includes: a bundle tube monitoring host, which is set near the stop-mining line of the goaf, and the detection end of the bundle tube monitoring host is respectively connected to the second end of the first bundle tube 12, the second end of the second bundle tube 13 and the second end of the third bundle tube 14.

[0055] It can be understood that since the detection end of the bundle tube monitoring host is respectively connected to the second end of the first bundle tube 12, the second end of the second bundle tube 13 and the second end of the third bundle tube 14, the bundle tube monitoring host can use the first bundle tube 12, the second bundle tube 13 and the third bundle tube 14 to realize gas monitoring in the asphyxiation zone, the oxidation heating zone and the heat dissipation zone of the goaf, thereby reducing the risk of spontaneous combustion in the goaf and thus improving the safety of underground operations. At the same time, since the bundle tube monitoring host is set close to the stop line of the goaf, the bundle tube monitoring host is not easily affected by the advancement of the working face, thereby ensuring stable monitoring of underground gas.

[0056] It should be noted that the bundle tube monitoring host is used to cooperate with the first bundle tube 12, the second bundle tube 13 and the third bundle tube 14 to realize gas monitoring in the asphyxiation zone, oxidation heating zone and heat dissipation zone of the goaf. The specific type of the bundle tube monitoring host can be set according to actual needs and is not limited to this.

[0057] In some embodiments, the mesh of the protective net 11 has a pore diameter of 0.1 mm.

[0058] It is understandable that by setting the mesh pore diameter of the protective net 11 to 0.1 mm, the mesh size of the protective net 11 is avoided to be too large, thereby ensuring that the protective net 11 effectively protects the first bundle of tubes 12, the second bundle of tubes 13 and the third bundle of tubes 14.

[0059] In some embodiments, the distance between the protective net 11 and the bottom plate of the return air duct is 1 m.

[0060] It is understandable that by setting the distance between the protective net cover 11 and the bottom plate of the return air channel to 1m, the height of the protective net cover 11 can be avoided from being set too high or too low, which facilitates construction while reducing the impact on underground construction.

[0061] In some embodiments, the first bundle of tubes 12 , the second bundle of tubes 13 , and the third bundle of tubes 14 have different shapes and / or markings.

[0062] It can be understood that the different shapes and / or markings of the first bundle of tubes 12 , the second bundle of tubes 13 , and the third bundle of tubes 14 can enable quick differentiation among the first bundle of tubes 12 , the second bundle of tubes 13 , and the third bundle of tubes 14 , thereby effectively improving the layout efficiency of the first bundle of tubes 12 , the second bundle of tubes 13 , and the third bundle of tubes 14 .

[0063] It should be noted that the first bundle of tubes 12, the second bundle of tubes 13, and the third bundle of tubes 14 may have different shapes. For example, the cross-sections of the first bundle of tubes 12, the second bundle of tubes 13, and the third bundle of tubes 14 are circular, square, and triangular, respectively. The first bundle of tubes 12, the second bundle of tubes 13, and the third bundle of tubes 14 may have different markings. For example, the markings may be numbers, patterns, marks, colors, etc. Furthermore, by setting different markings, automated equipment can be used for identification and automatic tube arrangement can be performed.

[0064] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "plurality" is two or more.

[0065] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0066] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations 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 any one or more embodiments or examples.

[0067] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A goaf monitoring system, characterized in that: include: A detection pipeline, comprising: a protective mesh, a first bundle of tubes, a second bundle of tubes, and a third bundle of tubes; the protective mesh is disposed on a side wall of a return air tunnel, and a protective channel is disposed within the protective mesh; the first bundle of tubes, the second bundle of tubes, and the third bundle of tubes are respectively disposed within the protective channel; a first end of the first bundle of tubes is located in a suffocation zone of the goaf; a first end of the second bundle of tubes is located in an oxidation and heating zone of the goaf; and a first end of the third bundle of tubes is located in a heat dissipation zone of the goaf; A monitoring device, wherein a detection end of the monitoring device is respectively connected to the second end of the first bundle of tubes, the second end of the second bundle of tubes, and the second end of the third bundle of tubes.

2. The goaf monitoring system according to claim 1, characterized in that: The detection pipeline also includes: A plurality of temperature measuring optical fibers are arranged in the wall of the protective net sleeve, and the plurality of temperature measuring optical fibers are distributed at intervals along the circumference of the protective net sleeve, and the temperature measuring optical fibers are connected to the detection end of the monitoring device.

3. The goaf monitoring system according to claim 2, characterized in that: The plurality of temperature measuring optical fibers include: A first optical fiber and a second optical fiber are arranged at intervals in the wall of the protective mesh sleeve, and the first optical fiber and the second optical fiber are located on a side of the protective mesh sleeve close to the side of the return air channel, and the first optical fiber and the second optical fiber are used to detect the coal wall temperature.

4. The goaf monitoring system according to claim 2, characterized in that: The plurality of temperature measuring optical fibers include: The third optical fiber and the fourth optical fiber are arranged at intervals in the wall of the protective net sleeve, and the third optical fiber and the fourth optical fiber are located on the side of the protective net sleeve close to the goaf, and the third optical fiber and the fourth optical fiber are used to detect the temperature of the goaf.

5. The goaf monitoring system according to claim 2, characterized in that: The protective net sleeve is made of heat-conducting material.

6. The goaf monitoring system according to claim 2, characterized in that: The monitoring device comprises: An optical fiber temperature measurement host is arranged close to the stop-mining line of the goaf, and a detection end of the optical fiber temperature measurement host is connected to the temperature measurement optical fiber.

7. The goaf monitoring system according to claim 1, characterized in that: The monitoring device comprises: A bundle tube monitoring host is provided near the stop-mining line of the goaf, and a detection end of the bundle tube monitoring host is respectively connected to the second end of the first bundle tube, the second end of the second bundle tube, and the second end of the third bundle tube.

8. The goaf monitoring system according to claim 1, characterized in that: The pore diameter of the mesh of the protective net is 0.1 mm.

9. The goaf monitoring system according to claim 1, characterized in that: The distance between the protective net and the bottom plate of the return air channel is 1m.

10. The goaf monitoring system according to claim 1, characterized in that: The first bundle of tubes, the second bundle of tubes, and the third bundle of tubes have different shapes and / or markings.

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