Methods, devices, electronic equipment and media for detecting air leakage in coal seam mining faces
By using multiple isotopes of sulfur hexafluoride gas for multi-point detection in the coal seam mining face, the problem of low detection efficiency of single gas source was solved, and accurate detection of multiple leakage points and analysis of leakage degree were achieved, which improved detection efficiency and provided an effective basis for treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANDI SCI & TECH CO LTD
- Filing Date
- 2022-10-28
- Publication Date
- 2026-06-30
AI Technical Summary
In existing technologies, single-source air source detection cannot accurately reflect the multiple air leakage points that may exist in the coal seam group mining face under complex fractured surrounding rock environment, resulting in low air leakage detection efficiency.
Multiple isotopes of sulfur hexafluoride gas with different structural types were released and collected at multiple test points. The leakage situation at each test point was determined by gas analysis, including the leakage detection results and the degree of leakage.
It enables accurate detection of multiple sources of air leakage in coal seam mining faces, improves detection efficiency, reduces negative impacts on normal mine production, and provides reliable guidance for air leakage control.
Smart Images
Figure CN115822715B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of coal mining technology, specifically to a method, device, electronic equipment, and medium for detecting air leakage in coal seam mining faces. Background Technology
[0002] Air leakage at the working face is a major cause of spontaneous combustion of coal underground, seriously threatening mine safety. Therefore, it is necessary to detect air leakage at the working face in a timely manner. Currently, the detection of sulfur hexafluoride tracer gas in coal mines uses a single gas source, meaning that a single test can only detect one leakage point. However, single-source testing cannot accurately and truly reflect the actual situation where there may be multiple leakage points at the working face in the complex and fractured surrounding rock environment of the mine, resulting in low efficiency in air leakage detection at current coal seam mining faces. Summary of the Invention
[0003] This application provides a method, device, electronic equipment, and medium for detecting air leakage in coal seam mining faces, which solves the problem that current single-source testing cannot accurately and realistically reflect the actual situation that there may be multiple air leakage points in the working face under complex fractured surrounding rock environment of the mine, resulting in low air leakage detection efficiency in current coal seam mining faces.
[0004] In a first aspect, embodiments of this application provide a method for detecting air leakage in a coal seam mining face, including:
[0005] Determine the test points in the area to be tested, wherein the number of test points is at least two;
[0006] Determine the gas sampling point on the return airflow of the area to be tested;
[0007] The isotope sulfur hexafluoride gas is released at each of the test points, and the gas is collected at the gas collection points to obtain the test gas; wherein, different test points release the isotope sulfur hexafluoride gas with different structural types.
[0008] The leakage detection results of each test point are determined based on the gas to be tested.
[0009] In one embodiment, determining the air leakage detection result at each test point based on the gas to be tested includes:
[0010] The gas to be tested is subjected to gas analysis to obtain gas analysis results;
[0011] If the gas analysis results indicate the presence of sulfur hexafluoride isotope in the gas to be tested, then the leak detection result at the test point that released the sulfur hexafluoride isotope is determined to be a leak.
[0012] In one embodiment, determining that the gas analysis result indicates the presence of sulfur hexafluoride isotope gas in the gas to be tested, and then determining the leakage detection result of the test point releasing the sulfur hexafluoride isotope gas as a leakage, includes:
[0013] If the gas analysis results indicate that the gas to be tested contains sulfur hexafluoride gas of multiple structural types, then the leakage detection results of the test points that release sulfur hexafluoride gas of each structural type are respectively determined as leakage.
[0014] In one embodiment, after determining that the leakage detection result of the test point releasing the isotope sulfur hexafluoride gas is a leakage, the method further includes:
[0015] Determine the gas concentration of the isotope sulfur hexafluoride gas;
[0016] The degree of air leakage at the test point that releases the isotope sulfur hexafluoride gas is determined based on the gas concentration.
[0017] In one embodiment, the degree of air leakage is proportional to the gas concentration.
[0018] In one embodiment, determining the test point in the region to be detected includes:
[0019] Acquire images of the fractured surrounding rock of the preceding coal seam and the working face of the subsequent coal seam in the area to be detected;
[0020] Based on the image, at least two test points are determined in the region to be detected.
[0021] In one embodiment, the gas collection point includes at least the upper corner of the working face of the subsequent mining coal seam in the area to be detected, the working face return airway, and the mine main return air passage.
[0022] Secondly, embodiments of this application provide an air leakage detection device for coal seam group mining faces, comprising:
[0023] The first determining module is used to determine the test points in the area to be detected, wherein the number of test points is at least two;
[0024] The second determining module is used to determine the gas sampling point on the return airflow of the area to be detected;
[0025] The release and acquisition module is used to release sulfur hexafluoride isotope gas at each of the test points and to collect the gas at the gas acquisition points to obtain the test gas; wherein, different test points release sulfur hexafluoride isotope gas of different structural types.
[0026] The third determining module is used to determine the air leakage detection result of each of the test points based on the gas to be tested.
[0027] Thirdly, embodiments of this application provide an electronic device, including a processor and a memory storing a computer program, wherein the processor executes the program to implement the steps of the coal seam group mining face leakage detection method described in the first or second aspect.
[0028] Fourthly, embodiments of this application provide a storage medium, which is a computer-readable storage medium including a computer program. When the computer program is executed by a processor, it implements the steps of the coal seam group mining face leakage detection method described in the first or second aspect.
[0029] The coal seam group mining face leakage detection method, device, electronic equipment, and storage medium provided in this application embodiment release different structural types of sulfur hexafluoride isotope gas at multiple test points in the test area simultaneously, and determine the leakage detection results of each test point based on the collected test gas. This enables simultaneous multi-source leakage point detection, accurately determines the leakage situation of each test point in the test area, and improves the leakage detection efficiency of coal seam group mining faces. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is one of the flowcharts illustrating the method for detecting air leakage in a coal seam mining face provided in this application embodiment;
[0032] Figure 2 This is the second flowchart illustrating the method for detecting air leakage in a coal seam mining face provided in this application embodiment;
[0033] Figure 3 This is the third flowchart illustrating the method for detecting air leakage in coal seam mining faces provided in this application embodiment;
[0034] Figure 4 This is a schematic diagram of the functional modules of an embodiment of the air leakage detection device for coal seam group mining face in this application;
[0035] Figure 5 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation
[0036] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0037] In the process of creating this application, the applicant considered the following aspects:
[0038] Coal spontaneous combustion refers to the physical and chemical adsorption of heat between coal and oxygen in the air at normal temperatures. In poor heat dissipation conditions, the coal temperature rises slowly, accelerating at the critical self-heating temperature until it reaches its ignition point and combusts. Simultaneously, in underground coal mining, fresh air must be continuously supplied to the working face due to personnel and equipment requirements. When the surrounding rock fissures are developed and fractured, airflow will escape through these fissures, entering the coal seam and goaf, causing air leakage. This leaked air then continuously contacts the underground coal seam, oxidizing and generating heat, significantly increasing the risk of spontaneous combustion and threatening the safety of personnel and equipment underground.
[0039] Due to the diverse geological ages and long history of coal formation in my country, underground coal resources characterized by coal seam clusters are prevalent. Coal resources in coal seam clusters are generally mined sequentially, meaning that after the preceding coal seam is mined and the roof collapses and compacts, the subsequent coal seam is mined. In close-proximity coal seam clusters (interlayer spacing generally less than 30m), the small distance between seams causes the fractured surrounding rock generated by mining to overlap, leading to communication between the working face of the subsequent coal seam and the surrounding rock fissures of the goaf of the preceding coal seam. This not only becomes a conduit for underground mine water, inducing mine water inrushes, but also a major channel for the loss of fresh air supply underground, causing spontaneous combustion of the coal seam and excessive gas levels at the working face, seriously threatening safe production in the mine. Because the development and conduction of surrounding rock fissures under repeated mining of coal seams are influenced by many factors, the conduction law of surrounding rock fissures under this condition cannot be accurately described and predicted to date. Therefore, adopting scientific and technical means to accurately detect and master the air leakage channels of mining fissures under coal seam conditions is a key technical problem that urgently needs to be solved to prevent and control related induced disasters.
[0040] Tracer gases are a general term for gases that can mix with air, remain unchanged, and can be detected at very low concentrations when studying air movement.
[0041] SF6 gas is a colorless, odorless, non-toxic, and non-flammable inert gas composed of sulfur (S) and sulfur (F). It possesses excellent insulating properties and is widely used in tracer gas monitoring. In nature, based on the number of neutrons in sulfur (F), there are 18 isotopes of F. However, due to its extremely short half-life, only a small fraction of F are stable isotopes. 18 F and 19 F. Meanwhile, element S has 32 S, 33 S, 34 S and 36 S has four stable isotopes. Because the SF6 molecule has an octahedral spatial structure, the single isotope S can combine with... 18 F and 19 F forms 10 stable SF6 isotopic molecular structures, and then 32 S, 33 S, 34 S and 36 S and 18 F and 19 There are a maximum of 40 stable SF6 isotope structures.
[0042] Currently, most SF6 tracer gas detection applications in coal mines use a single gas source, meaning a single test can only detect one leak point. Since gas concentration is highly sensitive to underground temperature and wind speed, and these conditions are not constant, the test results for the same leak point can vary at different times due to changes in wind speed and temperature. Therefore, single-source testing cannot scientifically compare and reflect the degree of leakage at different points, nor can it accurately reflect the actual situation where multiple leak points may exist in the complex, fractured rock environment of a mine.
[0043] Based on the above considerations, the applicant has proposed various embodiments of this application.
[0044] The following describes in detail the method, apparatus, electronic equipment, and storage medium for detecting air leakage in coal seam mining faces provided by the present invention, with reference to specific embodiments.
[0045] Figure 1 This is one of the flowcharts illustrating the air leakage detection method for coal seam group mining faces provided in this application embodiment. (Refer to...) Figure 1 This application provides a method for detecting air leakage in a coal seam mining face, which may include:
[0046] Step S100: Determine the test points in the area to be tested;
[0047] It should be noted that the execution subject of the coal seam group mining face air leakage detection method provided in this application embodiment can be a computer device, such as a mobile phone, tablet computer, laptop computer, handheld computer, vehicle electronic device, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA). In some scenarios, it can also be executed manually.
[0048] The areas to be inspected are those involved in underground coal mining that require safety inspections.
[0049] The area to be detected may include the preceding coal mining area, the goaf, the subsequent coal mining area, and the surface involved in coal mining.
[0050] The test point is the area in the test area where air leakage may occur.
[0051] In this embodiment, multiple test points can be determined simultaneously to perform air leakage detection on multiple test points at the same time.
[0052] The points to be measured can be determined through on-site human surveys, by taking images and analyzing them manually, or by using artificial intelligence to identify them.
[0053] In some embodiments, the testing personnel may conduct a survey of the area to be tested based on their testing experience, and determine the possible points of air leakage and fractures in the fractured surrounding rock of the preceding coal seam and the working face of the subsequent coal seam as test points based on the survey results. Understandably, the number of test points is generally greater than or equal to 2.
[0054] It should be noted that since the number of structural molecules of the stable isotope sulfur hexafluoride gas is 40, the number of test points to be tested simultaneously should be less than or equal to 40.
[0055] In some embodiments, if detection or surveying determines that there is only one suspected air leak point in an area, then only one test point can be identified, and air leak detection can be performed on that test point alone.
[0056] Step S200: Determine the gas sampling point on the return airflow of the area to be tested;
[0057] In this application, several gas collection points can be sequentially set on the return airflow of the coal seam working face subsequently mined in the area to be detected. The number of gas collection points in this application is greater than or equal to three.
[0058] In some embodiments, gas collection points may be located in areas such as the upper corner of the coal seam working face, the working face return airway, and the main return air passage of the mine.
[0059] It should be noted that this application does not specify the exact location of the gas collection points in areas such as the upper corner of the working face of the coal seam being mined subsequently, the return airway of the working face, and the main return air passage of the mine. For example, gas collection points can be set in areas such as the upper corner of the working face of the coal seam being mined subsequently, the return airway of the working face, and the main return air passage of the mine, based on actual needs or experience.
[0060] The term "upper corner" is generally used in mining terminology and refers to the triangular area on the return air side of a coal mining face, which is close to the upper side of the return airway and the edge of the goaf.
[0061] It should be noted that in mine ventilation, the airflow that flows out after cleaning the working face is called "return air," and the roadway through which the return air flows is called a return airway. Return airways include the main return airway, the primary return airway, the mining area return airway, and the working face return airway.
[0062] Step S300: Release sulfur hexafluoride isotope gas at each test point and collect the gas at the gas collection point to obtain the test gas;
[0063] In this application, after determining the test points and gas collection points, the corresponding isotope sulfur hexafluoride gas can be released simultaneously at each test point. That is, a single test point releases sulfur hexafluoride gas of the same structural type, while different test points release sulfur hexafluoride gas of different structural types.
[0064] Meanwhile, the following parameters at each test point must be consistent: 1) the time of release start T0; 2) the concentration N0 and rate V0 of the released gas; 3) the duration T of a single release. C (T C Under the condition of not less than the farthest path, the time for the tracer gas (isotope sulfur hexafluoride gas) to reach the gas collection point from the release point is generally greater than 30 minutes; 4) the number of times the tracer gas is released, n.
[0065] To avoid missing the time it takes for the tracer gas released from the test point to pass through the gas collection point, immediately after releasing sulfur hexafluoride isotope gas at the test point, gas samples that may contain sulfur hexafluoride gas should be collected from the return airflow at each gas collection point. At least three samples should be collected at a time, and the time interval between collections should be less than T. C This ensures that the isotopic sulfur hexafluoride gas flowing through the test point is collected. After the gas collection is completed, the test gas is obtained.
[0066] Step S400: Determine the air leakage detection results at each test point based on the gas to be tested.
[0067] In this application, the collected gas to be tested can be analyzed to determine whether sulfur hexafluoride isotope gas released from each test point exists in the gas to be tested, thereby obtaining the leakage detection result of whether each test point is leaking air.
[0068] In this application, the air leakage test result can be either air leakage or no air leakage.
[0069] The method for detecting air leakage in coal seam mining faces provided in this application involves determining at least two test points within the detection area; identifying gas collection points on the return airflow within the detection area; releasing sulfur hexafluoride (SF6) isotope gas at each test point and collecting the gas at the collection points to obtain the test gas; wherein different test points release SF6 isotope gas with different structural types; and determining the air leakage detection result for each test point based on the test gas. By simultaneously releasing SF6 isotope gas with different structural types at multiple test points within the detection area and determining the air leakage detection result for each test point based on the collected test gas, simultaneous multi-source air leakage detection can be achieved, accurately determining the air leakage situation at each test point within the detection area, thus improving the air leakage detection efficiency of coal seam mining faces.
[0070] This application innovatively utilizes the differences between isotopic sulfur hexafluoride gases of different structural types to propose the use of multiple isotopic sulfur hexafluoride gases of different structural types to detect and analyze the sources and extent of multi-source air leakage in working faces under coal seam mining and fractured surrounding rock conditions. This solves the technical problem that the sources and extent of air leakage in working faces under coal seam mining and fractured surrounding rock conditions cannot be quantitatively and qualitatively analyzed and detected, and provides an effective scientific basis for air leakage control in coal mining working faces in severely fractured surrounding rock geological environments under coal seam conditions.
[0071] Furthermore, compared to multiple tests of multiple leak points using a single gas source, simultaneous testing of multiple leak points reduces the number of leak detections underground, improves the efficiency of leak detection, and reduces the negative impact of detection work on normal mine production.
[0072] Compared to traditional single-source leak detection, multi-source leak detection simultaneously collects tracer gases released from different leak detection points, fundamentally avoiding interference from changes in airflow velocity and temperature within the mine. By analyzing the concentration of sulfur hexafluoride isotope gas released from each leak point along the leak path, not only can the leak path be accurately determined, but the degree of leakage at different points can also be reliably compared, providing reliable guidance for the precise and efficient development of leak prevention measures at the working face.
[0073] This application solves the technical challenge of accurately and comprehensively detecting air leakage paths under complex and fractured surrounding rock conditions in coal seams. Multi-source air leakage testing can more realistically and comprehensively reflect the actual situation of multiple air leakage points that may exist under complex surrounding rock conditions after repeated mining of coal seams. It innovatively proposes a reliable method for determining air leakage paths and degrees, providing effective technical support for subsequent air leakage control work in working faces under these conditions.
[0074] Figure 2 This is the second flowchart illustrating the method for detecting air leakage in a coal seam mining face provided in this application. (Refer to...) Figure 2 In one embodiment, determining the test point in the region to be detected includes:
[0075] Step S101: Obtain images of the fractured surrounding rock of the preceding coal seam and the working face of the subsequent coal seam in the area to be detected;
[0076] In this application, images of the fractured surrounding rock of the preceding coal seam and the working face of the subsequent coal seam in the area to be detected can be obtained using photographic equipment.
[0077] Among them, the photography equipment can be cameras, webcams, mobile phones, etc.
[0078] Step S102: Determine the test points in the detection area based on the image.
[0079] After obtaining images of the fractured surrounding rock of the preceding coal seam and the working face of the subsequent coal seam in the area to be tested, the images can be sent to the testing personnel. The testing personnel can then identify the possible points of air leakage and conduction in the fractured surrounding rock of the preceding coal seam and the working face of the subsequent coal seam in the area to be tested, and use these points as the test points.
[0080] Understandably, in this application, a leak point prediction model can also be pre-constructed based on the scenario, and the leak point prediction model can be trained using sample images and leak point information marked in the sample images to obtain a prediction model for predicting leak points based on the input image.
[0081] Therefore, this application can input the images of the preceding coal seam mining and fractured surrounding rock and the subsequent coal seam working face in the area to be detected into the prediction model obtained above. The prediction model can then predict the images of the preceding coal seam mining and fractured surrounding rock and the subsequent coal seam working face in the area to be detected, and obtain the prediction results output by the prediction model.
[0082] Furthermore, the regions in the prediction results where the predicted value is greater than the predicted value threshold are identified as test points. The predicted value threshold can be between 0.5 and 1, for example, 0.5, 0.6, 0.7, 0.8, 0.9, etc.
[0083] This embodiment can acquire images of the fractured surrounding rock of the preceding coal seam mining and the working face of the subsequent coal seam mining in the area to be detected. By acquiring the images, the test points can be quickly and accurately determined from the area to be detected, so as to facilitate air leakage detection at the test points. This can accurately determine the air leakage situation of each test point in the area to be detected, improve the air leakage detection efficiency of the coal seam group mining working face, and thus ensure the safety of underground coal mining operations.
[0084] Figure 3 This is the third flowchart illustrating the method for detecting air leakage in a coal seam mining face provided in this application. (Refer to...) Figure 3 In one embodiment, determining the leakage detection result at each test point based on the gas to be tested includes:
[0085] Step S401: Perform gas analysis on the gas to be tested and obtain the gas analysis results;
[0086] After obtaining the gas to be tested, this application can perform gas analysis on the gas to be tested using an isotope mass spectrometer to determine whether there are isotopic sulfur hexafluoride gases of various structural types released at each test point in the gas components of the gas to be tested, and obtain gas analysis results.
[0087] The gas analysis results can include information on all gas components of the gas being analyzed.
[0088] An isotope mass spectrometer is a precision instrument used to determine the ratio of isotopes. It works in a closed vacuum system by using an ion source inside the instrument to convert the sample into charged ions. These different ions have different masses, and the ions with different masses reach the detector at different times under the influence of a magnetic field. The result is a mass spectrum.
[0089] Step S402: If the gas analysis result indicates the presence of sulfur hexafluoride isotope in the gas to be tested, then the leak detection result at the test point that released sulfur hexafluoride is determined to be a leak.
[0090] If, after completing the gas analysis, the gas analysis results indicate the presence of sulfur hexafluoride isotope in the gas being tested, it means that at least one of the test points has an air leak.
[0091] Therefore, the structural type of the isotopic sulfur hexafluoride gas can be determined, and the leakage detection result of the test point that releases the isotopic sulfur hexafluoride gas of this structural type can be determined as leakage.
[0092] Furthermore, if the gas analysis results confirm the presence of sulfur hexafluoride isotope in the gas being tested, then the leak detection result at the test point releasing sulfur hexafluoride is determined to be a leak, including:
[0093] Step S4021: If the gas analysis result is determined to be that the gas to be tested contains sulfur hexafluoride gas of multiple structural types, then the leakage detection result of the test point that releases sulfur hexafluoride gas of each structural type is determined to be a leakage.
[0094] Furthermore, if, after completing the gas analysis, it is determined that the gas contains multiple structural types of sulfur hexafluoride isotopes, it indicates that multiple test points are leaking air simultaneously.
[0095] Therefore, the structural type of each isotope of sulfur hexafluoride gas can be determined, and the leakage detection result of the test point releasing each structural type of isotope sulfur hexafluoride gas can be determined as leakage.
[0096] Furthermore, after confirming that the leak detection result at the test point releasing sulfur hexafluoride gas is indeed a leak, the following steps are also included:
[0097] Step S403: Determine the gas concentration of the isotope sulfur hexafluoride gas;
[0098] After confirming that the leak detection result of the test point releasing sulfur hexafluoride gas is a leak, the gas concentration of sulfur hexafluoride gas of each structural type can be determined according to the gas analysis results of the isotope mass spectrometer.
[0099] Step S404: Determine the degree of air leakage at the test point that releases sulfur hexafluoride isotope gas based on the gas concentration.
[0100] After determining the gas concentration of sulfur hexafluoride isotope for each structural type, the degree of air leakage at the test point is directly proportional to the gas concentration of the tracer gas released and collected from the test point. That is, the higher the gas concentration of the tracer gas released and collected from the test point, the higher the degree of air leakage at the test point.
[0101] Therefore, based on the direct proportionality between the degree of air leakage and the gas concentration, the degree of air leakage at the test point can be determined according to the gas concentration at the test point. This application does not specifically limit the direct proportionality between the degree of air leakage and the gas concentration; it can be determined based on actual needs or experience.
[0102] This embodiment can accurately determine whether there is air leakage at each test point by analyzing the collected gas, which can improve the air leakage detection efficiency of coal seam mining faces.
[0103] Furthermore, the degree of air leakage at the test point can be determined based on the gas concentration of sulfur hexafluoride isotope released at the test point, providing effective support for subsequent air leakage control work at the working face under these conditions.
[0104] Furthermore, this application also provides a device for detecting air leakage in coal seam mining faces.
[0105] Reference Figure 4 , Figure 4 This is a schematic diagram of the functional modules of an embodiment of the air leakage detection device for coal seam group mining face in this application.
[0106] The air leakage detection device for the coal seam group mining face includes:
[0107] The first determining module 410 is used to determine the test points in the area to be detected, wherein the number of test points is at least two.
[0108] The second determining module 420 is used to determine the gas collection point on the return airflow of the area to be detected;
[0109] The release and acquisition module 430 is used to release isotopic sulfur hexafluoride gas at each of the test points and to collect the gas at the gas acquisition points to obtain the test gas; wherein, different test points release isotopic sulfur hexafluoride gas with different structural types.
[0110] The third determining module 440 is used to determine the air leakage detection result of each of the test points based on the gas to be tested.
[0111] The coal seam group mining face leakage detection device provided in this application embodiment determines the test points in the test area, with at least two test points; determines gas collection points on the return airflow in the test area; releases sulfur hexafluoride isotope gas at each test point and collects the gas at the gas collection point to obtain the test gas; wherein different test points release sulfur hexafluoride isotope gas with different structural types; and determines the leakage detection result of each test point based on the test gas. By simultaneously releasing sulfur hexafluoride isotope gas with different structural types at multiple test points in the test area and determining the leakage detection result of each test point based on the collected test gas, multi-source leakage point detection can be achieved simultaneously, accurately determining the leakage situation of each test point in the test area, and improving the leakage detection efficiency of coal seam group mining faces.
[0112] In one embodiment, the first determining module 410 is specifically used for:
[0113] Acquire images of the fractured surrounding rock of the preceding coal seam and the working face of the subsequent coal seam in the area to be detected;
[0114] The test points in the region to be detected are determined based on the image.
[0115] In one embodiment, the third determining module 440 is specifically used for:
[0116] The gas to be tested is subjected to gas analysis to obtain gas analysis results;
[0117] If the gas analysis results indicate the presence of sulfur hexafluoride isotope in the gas to be tested, then the leak detection result at the test point that released the sulfur hexafluoride isotope is determined to be a leak.
[0118] In one embodiment, the third determining module 440 includes a first determining unit, the first determining unit being configured to:
[0119] If the gas analysis results indicate that the gas to be tested contains sulfur hexafluoride gas of multiple structural types, then the leakage detection results of the test points that release sulfur hexafluoride gas of each structural type are respectively determined as leakage.
[0120] In one embodiment, the third determining module 440 includes a second determining unit, the second determining unit being used for:
[0121] Determine the gas concentration of the isotope sulfur hexafluoride gas;
[0122] The degree of air leakage at the test point that releases the isotope sulfur hexafluoride gas is determined based on the gas concentration.
[0123] Figure 5 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communication interface 520, and the memory 530 communicate with each other via the communication bus 540. The processor 510 can call the computer program in the memory 530 to execute the steps of the coal seam group mining face leakage detection method, such as including:
[0124] Determine the test points in the area to be tested, wherein the number of test points is at least two;
[0125] Determine the gas sampling point on the return airflow of the area to be tested;
[0126] The isotope sulfur hexafluoride gas is released at each of the test points, and the gas is collected at the gas collection points to obtain the test gas; wherein, different test points release the isotope sulfur hexafluoride gas with different structural types.
[0127] The leakage detection results of each test point are determined based on the gas to be tested.
[0128] Furthermore, the logical instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0129] On the other hand, embodiments of this application also provide a storage medium, which is a computer-readable storage medium storing a computer program. The computer program is used to cause a processor to execute the steps of the methods provided in the above embodiments, including, for example:
[0130] Determine the test points in the area to be tested, wherein the number of test points is at least two;
[0131] Determine the gas sampling point on the return airflow of the area to be tested;
[0132] The isotope sulfur hexafluoride gas is released at each of the test points, and the gas is collected at the gas collection points to obtain the test gas; wherein, different test points release the isotope sulfur hexafluoride gas with different structural types.
[0133] The leakage detection results of each test point are determined based on the gas to be tested.
[0134] The computer-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO)), optical storage (e.g., CD, DVD, BD, HVD), and semiconductor storage (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)).
[0135] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0136] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.
[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A coal seam group mining working face air leakage detection method, characterized in that, include: Determine the test points in the area to be tested, wherein the number of test points is at least two; Determine the gas sampling point on the return airflow of the area to be tested; Isotope sulfur hexafluoride gas is released at each of the test points, and gas is collected at the gas collection points to obtain the test gas; wherein, different test points release sulfur hexafluoride gas of different structural types; the start time, gas concentration, duration of a single release, and number of releases of sulfur hexafluoride gas of different structural types at each of the test points are the same. The air leakage detection results at each test point are determined based on the gas to be tested. The step of determining the air leakage detection result at each test point based on the gas to be tested includes: The gas to be tested is subjected to gas analysis to obtain gas analysis results; If the gas analysis result indicates that sulfur hexafluoride isotope is present in the gas to be tested, then the air leakage detection result of the test point that releases sulfur hexafluoride is determined to be an air leakage. After determining that the leakage detection result of the test point releasing the isotope sulfur hexafluoride gas is a leakage, the method further includes: Determine the gas concentration of the isotope sulfur hexafluoride gas; The degree of air leakage at the test point that releases the isotope sulfur hexafluoride gas is determined based on the gas concentration. The determination of the test points in the area to be detected includes: Acquire images of the fractured surrounding rock of the preceding coal seam and the working face of the subsequent coal seam in the area to be detected; The image is input into the air leakage point prediction model for prediction to obtain the prediction result; the area in the prediction result where the predicted value is greater than the predicted value threshold is determined as the test point; wherein, the air leakage point prediction model is trained by the sample image and the air leakage point information marked in the sample image.
2. The coal seam group mining face air leakage detection method according to claim 1, characterized in that, If the gas analysis result indicates the presence of sulfur hexafluoride isotope gas in the gas to be tested, then the leak detection result at the test point releasing the sulfur hexafluoride isotope gas is determined to be a leak, including: If the gas analysis results indicate that the gas to be tested contains sulfur hexafluoride gas of multiple structural types, then the leakage detection results of the test points that release sulfur hexafluoride gas of each structural type are respectively determined as leakage.
3. The coal seam group mining face air leakage detection method according to claim 1, characterized in that, The degree of air leakage is directly proportional to the gas concentration.
4. The method for detecting air leakage in a coal seam group mining face according to claim 1, characterized in that, The gas collection points include at least the upper corner of the working face of the coal seam to be mined in the area to be detected, the return airway of the working face, and the main return air passage of the mine.
5. A device for detecting air leakage in a coal seam mining face, characterized in that, include: The first determining module is used to determine the test points in the area to be detected, wherein the number of test points is at least two; The second determining module is used to determine the gas sampling point on the return airflow of the area to be detected; The release and acquisition module is used to release sulfur hexafluoride isotope gas at each of the test points and to acquire the gas at the gas acquisition point to obtain the test gas; wherein, different test points release sulfur hexafluoride isotope gas of different structural types; the start time, gas concentration, duration of a single release, and number of releases of sulfur hexafluoride isotope gas of different structural types at each of the test points are the same. The third determining module is used to determine the air leakage detection result of each of the test points based on the gas to be tested. The third determining module is specifically used to perform gas analysis on the gas to be tested and obtain gas analysis results; if the gas analysis results determine that sulfur hexafluoride isotope gas is present in the gas to be tested, then the leakage detection result of the test point that releases sulfur hexafluoride isotope gas is determined to be leakage. The third determining module includes a second determining unit, which is used to determine the gas concentration of the isotopic sulfur hexafluoride gas; and to determine the degree of air leakage at the test point that releases the isotopic sulfur hexafluoride gas based on the gas concentration. The first determining module is specifically used for: Acquire images of the fractured surrounding rock of the preceding coal seam and the working face of the subsequent coal seam in the area to be detected; The image is input into the air leakage point prediction model for prediction to obtain the prediction result; the area in the prediction result where the predicted value is greater than the predicted value threshold is determined as the test point; wherein, the air leakage point prediction model is trained by the sample image and the air leakage point information marked in the sample image.
6. An electronic device comprising a processor and a memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method for detecting air leakage in a coal seam mining face as described in any one of claims 1 to 4.
7. A medium, said medium being a computer-readable storage medium, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for detecting air leakage in a coal seam mining face as described in any one of claims 1 to 4.